Lanli Technology offers a wide range of possibilities for precise and accurate CNC turning parts. We provide design for CNC turning helps to improve the part functionality, cosmetic appearance and reduce production cost. There are some design restrictions and considerations you may consider when you want to develop any machined part.

The Metal Shaft Parts On Cylindrical Grinding Machine For Surface Finishing Process. The Automotive Parts Manufacturing Process By Surface Grinding Machine Control By Cnc Program600

Part 1:
The Basic

  • What is CNC turning?
  • What types of machines are there?
  • Which are their key benefits & limitations?
Cnc Machining Process

Part 2:
Design for CNC Turning

  • CNC Turning design restrictions
  • Design Rules for CNC Turning
  • Designing undercuts
The Metal Shaft Parts On Cylindrical Grinding Machine For Surface Finishing Process. The Automotive Parts Manufacturing Process By Surface Grinding Machine Control By Cnc Program. Min

Part 3: Material for CNC Turning

  • Metal
  • Plastic
  • Surface treatment
Cnc Machining Process

Part 4: Cost reduction tips

Tips to keep your CNC Turning project on budget

Cnc Machining Process

Part 5: Start CNC Turning

Cnc Machining Process

Part 6: What can CNC Turning process do?

Part 1:

What is CNC turning?

CNC tuning is a complex and detailed manufacturing method for custom parts and components. In this method, you can put a cutting tool against a spinning tool. The turning method is the best suitable for manufacturing symmetrical parts and is a fast and cheap method compared to CNC milling parts. With CNC lathe, you can cut the material such as plastic, wood, and metal.


It is a subtractive method and uses to create CNC-turned parts and components. CNC turning can use for the manufacturing of oblique and cylindrical shapes. CNC lathe is the oldest machining tool, but now it has many new modern technologies and processes to create the most rigid and detailed parts. 

What Types of Machines can use for CNC Turning and Machining?

The manufacturing industry uses CNC machines for the manufacturing of various parts and components. The CNC machines replace the conventional machines such as verticle miller, CNC router, shaping machine, center lathe, and other manually operated machines. This CNC machining system allows automating parts production. The significant advantages of CNC machines are:

  • High productivity & reduction in waste material
  • Less risky & error-free
  • High accuracy & detailed parts of precision

Several types of CNC machining are using in the manufacturing industry, and each machine has its rare functionality and features. Some different types of CNC machines we employ in the CNC system are:

1: CNC Lathe Machines

CNC lathes machines can rotate material during operation. Lathes consist of two axis-X and Z. The operating and controlling systems of lathe and mill machines are the same. Lathe machines are more compact and smaller than other CNC machines as it has less number of axis. A lathe can spin the workpiece in a spindle. More heavy features of lathe call “turning centers.” More superior turning centers also have milling capacities. These CNC turning centers comprehend as mill-turn machines. You can direct the lathe by proprietary code or G-code. Essential parts of turning centers and lathe are:

  • Leadscrew & feeder screw
  • Tailstock & carriage
  • Bed & headstock
  • Cutting tool & tool turrets
  • Chunks & carriages

Many operations can perform on the turning center, and some primary functions are knurling, threading, boring, drilling, reaming, and taper turning.


2: EDM (Electric Discharge Machines)

EDM also refer as die sinking and a spark CNC machine. EDM is a unique process that can mold workpieces into desire shapes with electrical sparks. Electrical discharge with its erosion effect can deform the material. This erosion effect is one of the significant advantages of EDM machines, and we can produce control sparks that can reshape the material. In the wire EDM (a subtype of EDM), we use spark erosion for removing the portion from an electrically conductive material. In the sinker, EDM workpiece and electrode soak in a dielectric fluid. It is for the piece formation. A computer can dictate the electrode production and electrical discharge when material place between upper and lower electrodes.

3: CNC Milling Machines

It is one of the standard machines we use for cutting and drilling. When material keeps inside the milling machines, tools can cut or pierce the fabric with mechanical dictation. The primary milling machine has three axes, X, Y, and Z, and state-of-the-art machines are available with three further axes. These six-axis configurations are mostly available for CNC milling machines. Most complicated milling machines also name machining centers, such as horizontal and vertical machining centers.

Besides these machines, CNC plasma cutter, CNC laser cutting, spark erosion, and water jets can use in the CNC machining industry to produce various turned parts.

What are The Key Benefits & Limitations of CNC Turning?

The CNC turning machines have unlimited advantages and increase CNC machines’ usage in several manufacturing industries. The industry that demands strict designing and high accuracy parts chooses the CNC turning and machining methods. These industries can get the best, and high-tolerance CNC turned parts that can meet their needs. Some of the significant vital benefits of CNC machining are:

1: Less Maintenance & Maximum Use of CNC Machining & Turning

CNC turning and machining need less maintenance and care than manually handled machines. The functionality rate of CNC machines is much higher than traditional machines. Manually devices can’t work without skilled engineers and workers. CNC machines can operate 24 hours, and maintenance requirements for using these machines are short. Rapid change for parts and manufacturing is possible, and you can get repeatable and precise CNC turned parts.

2: Requirement of Low Labor & Option for the Prototype Creation

CNC machining method is an automated process, so fewer personnel require for oversight and operation. It also decreases the overall expenses of the process. CAD and CAM software can control all functions and reduces all chances of human errors. The other significant key benefit of CNC machining is the production of a prototype for parts manufacturing. The model inspection and review is possible before production, and it eliminates the components error. You can view the parts from all perspectives, and it also saves your time and material.

3: More Versatility & Parts Precision

CNC machines produce more versatile and precise parts for various industries such as aerospace, automobile, and medical industries. The production of components that need critical accuracy and precision requirements is possible with the CNC machining and turning operations. We can perform CNC machining with a wide range of materials, making sure versatility in parts production. We use rigid foam and plastic for the CNC procedure.

4: High Accuracy for Machining Components & More Flexibility

The use of computer software makes possible high accuracy and flexibility for the components. Human mistakes can cause significant problems, and CNC machining proves helpful in this regard, and you find fewer chances for errors as the complete process control by a computer. You can get and produce different parts quickly and easily with software reprogramming and get parts according to your demands.

The limitation of CNC Turning

There are some limitations that you encounter when choosing the CNC machining process. So make sure you know all pros and cons of CNC turning and machining. Some of the rules of this process are:

1: The Possibility of Errors

The possibility of error can’t eliminate in CNC machining, affecting the accuracy of the machining parts. A well-trained engineer can give you the most remarkable accuracy and precision. So make sure you are choosing the right company for your order. A good company can help you with the whole process of parts production, from prototypes to parts manufacturing. A slight error can produce improper alignments and can create problems for you. So select the expertise of CNC machining and turning process for avoiding any inconvenience.

2: The High Cost

You may find material for CNC turning a little costly than other manufacturing methods. You need a big budget for the initial investment. Tooling cost and purchasing parts are also affecting the overall cost of the features and components. With the increasing technology, the supply of CNC parts is increasing. As a result, the prices of CNC parts are decreasing. So high cost is one main weak point for the CNC turning and machining process. 


3: Deficiency of Skill & Human Resource

CNC machines have replaced manually operated machines, and people have stopped adopting these skills. This lack can lead to skill deficiency, and no more people are trying to learn the skills. Therefore, CNC machining eliminates the industry’s skilled personnel, and most of the work complete with robots and machines. So the need for staffing also happens due to automated machines. This CNC process also is a reason for the increase in unemployment in the world.

Part 2

Design for CNC Turning

CNC turning offers a wide range of possibilities for precise and accurate parts. You can get your high-quality end product if you set a good design for your components. Design for CNC turning helps to improve the part functionality, cosmetic appearance and reduce production cost. There are some design restrictions and considerations you may consider when you want to develop any machined part.

CNC Turning Design Restrictions

1: Tool Restriction

Lathe machine has tools that can add additional milling features on turning parts such as grooves, slots, and flat. Axial, on-axis and a radial hole can add for turning parts, and for the aluminum and brass machined parts, you can use mill off-axis holes. Lathe specially designs for tuning material, and it uses for the cylindrical complex turned parts and shape.

2: Size Limitation

For any part, the Diameter should be more than 0.76mm, and the angle suggests to have greater than 30 degrees. The maximum dimension for CNC turning steel, titanium, and stainless steel parts is 74.93mm in diameter. It should be 100.33 mm for the brass and aluminum.

3: Length

The maximum length for CNC-turned parts should be 228.6 mm, and the minimum length requirements are 1.27mm for turned parts.

4: Threaded Hole & Radii

CNC machining can add threaded features to turned and milled parts. You can select a limited selection of metric, UNC, and UNF threads for CNC turned and milled parts. On-turned parts thread holes can model at a proper diameter, and the choice of thread holes may be different for CNC turning and milling machined parts. Some thread hole for CNC turning parts are:

  • Coil insert & key insert
  • Standard hole & OD thread

5: Angle

CNC turning can produce rounded corners both for internal and external corners. Sharp inner angles are not suitable for the CNC turning. Sharp inner angles are right for CNC milling.

6: CNC Live Tooling

CNC live tooling can add extra features such as slot, drill, and mill surfaces and stop the bar’s rotation. Live tooling is a rotary cutting tool. An independent generator powers it, and because of its power generator, it can drill holes, which prove very useful. Live tooling can provide more flexibility and capacities. One of the main benefits of live tooling is that it can reduce work-in-process, and it can prove cost-effective for your machined parts.

7: Spindle

Some manufacturing shops have one spindle, and others may have two spindles, one primary spindle, and the other sub-spindle. One spindle performs work from one side. You can use partially machine parts on the main spindle, and then it can move to the sub-spindle, and it complete the additional work.

8: Small Features

Cavities and holes less than 2.5mm prove very difficult to machine and consider micromachining. Micromachining needs special tooling and expert personnel. Try to avoid small features and use small parts when you need them essentially.

Design Rule for CNC Turning

1: Grooves

Minimum OD grooves for the brass and aluminum parts are 0.5mm, and the maximum OD groove depth is 24.1mm.

2: Radii

Radii must identify before the milling process of a part, and turning outside corner has a 0.005-inch chamfer. CNC machining procedure can round the sharp inside corner of a piece.

3: Wall Thickness

Your CNC turned part design should comply with minimum wall thickness. Try to avoid the thin feature or thin wall. Thin wall features are very prone to vibration, and they may cause damage or break. The Wall thickness of CNC turning is 0.51mm. Reduction in the wall thickness can also reduce the material stiffness. The wall thickness may vary according to material and tools. Standard thickness guidelines are for metal material 0.8mm and 1.5 for plastic material.

4: Tolerance

+/- 0.13mm

5: Maximum & Minimum Length

The maximum length of CNC turning machine parts is 228.6mm, and the minimum size is 1.27mm.

6: Minimum diameter

The minimum diameter of CNC turning parts is 4.07.

Design Rule for CNC Turning Parts

The design guideline for the turning parts is as follows:

  1. Design the turned parts stubby instead of long turning parts with a high aspect ratio. Make it possible a long tailstock should not make during the part designing.
  2. Cast parts turn down, and you can avoid burr by keeping the surface perpendicular to the turned down.
  3. Removal of burr should only suggest a specific one, and blanket specifications like break all corners don’t recommend. It proves very costly if you try to remove all burrs. Grossing of some specific burrs is an excellent and cost-effective process for turned parts.
  4.  Parting lines flash, and weldment areas should not turn because it can increase the cutter life.
  5. Several setups should minimize, and it is better to group milling into a set of parallel planes.
  6. The blend of radii with an existing surface is not correct. It will be costly to get the cosmetic quality of blending.
  7.  If you face a surface, it should angle, and it will help provide the tool clearance.
  8. Carbide cutting surface has high cutting performance, and it requires minor toll variations.
  9. The chuck clamp’s cylindrical surface will be better if it doesn’t have parting lines, and the flash can’t precede error.

Undercut for CNC Turning

Undercut turning requires special tools, and different design practices can use for the various undercut. The undercut can’t machine and cut with the standard cutting tool, and we have to use a unique tool for the machine undercut. Make sure you are selecting the proper depth of your undercut. It should have a standard dimension. CNC tools have some length limitations, so the undercut should not be too deep. It will become tough to produce the undercut as the tool can’t reach the deep area. It also knows as relief groove and neck. The undercut thread length should be 1.5, and the diameter should be at least 0.38mm. The most common undercuts are:

1: T-slot Undercut

It features a horizontal and cutting blade on a verticle shaft and makes a flat cutting blade attach with a shaft. The width of the undercut should be at least 0.3 mm to You can select fraction or whole increment for defining your undercut.

2: Dovetail Undercut

Dovetail undercut base on an angle and standard angles are 45 and 60 degrees. You can find many other tools with various angles; the standard ratio for the shaft and cutting diameter maybe 1 to 2 mm. For non-standard depth, a custom tool can use. The undercut amount should be small because it proves difficult to machine, and it also requires multiple setups and specific tools.

Part 3

CNC Turning Material

You can select any type of material for the CNC turning and machining process. It would be best to consider the properties, cosmetic appearance, rate, and material’s manufacturing properties. You can choose the material that suits CNC turning and for the various parts applications. Common material we use for CNC turning is:

Plastic material

1: Nylon

It also names polyamide and a silky thermoplastic material. Nylon material can melt and use various types of turned parts with friction resistance and high compressor strength. CNC turning manufacturing process can provide the exact configuration for the nylon parts. Nylon twisted parts have tight tolerance. The processing of nylon is significantly cost-effective and time-saving. Various industries apply nylon CNC turned parts. We can use nylon parts for electronic insulation and medical devices. Some nylon parts are:

  • Gears & Bearings
  • Bushes & Nylon screws
  • Sprockets & Mechanical damper
  • Electrical housing & Washers
  • Aerospace parts
  • Spacer for panel-mounted circuit board

Nylon parts have many advantages, and some significant nylon advantages are:

  • Lightweight & low maintenance
  • A good alternative for metal material
  • Durable & cost-effective than other plastic material
  • High heat resistance & tolerance
  • High production capacities
  • High rigidity & dimensional stability

2: PVDF (Polyvinylidene Fluoride)

PVDF is challenging and sturdy material, and these properties you can see in its tensile and strength. It is UV stable and has good abrasion resistance, and you can use PVDF as insulation for electrical writing. It can make possible because of its low thermal conductivity, heat erosion, light-weighted, and flexibility. PVDF is possible to machine and has resistance to creeping under mechanical loading. It highly recommends for the applications and process which require super resistance to acid and sound purity.


PVC is the right choice for the CNC machining and turning process as it is highly machineable and has good chemical resistance. PVC is a rigid polymer and has a good rating for fire resistance. Some prominent features of PVC are:

  • Good compressive strength & Less moisture absorption
  • Excellent insulation & Electrical properties
  • Good resistance to strong alkyds & acids
  • Difficult to ignite & Good material for various parts fabrication

You can choose PVC for your parts manufacturing. You can get:

  • Wear parts
  • Rings & Rollers
  • Bushes
  • Electrical Components

Assistance is necessary for selecting material for your part manufacturing. It can affect the quality of your part.


1: Brass

It is a metal alloy mixture of copper and zinc. Brass most commonly uses in the production industry. Brass can find easy-to-machine as compared to aluminum. Brass has a low melting point and flows characteristics that make it easy to cast. Brass mainly uses plumbing, medical and electrical work, and many other industries such as the musical instruments industry use brass in their parts manufacturing procedure. Demands and applications of brass are increasing. There are many features of brass that make this material exceptional and unique for parts fabrication. Some features of brass are:

     Recyclable & have corrosion resistance.

     Durable & inexpensive

     High conductivity & reduction in wastage

Brass can cut quickly and have no negative impact on chip formation and surface finishes. Brass is accessible to the machine compared to aluminum and other manufacturing materials use for CNC turning.

2: Aluminum

The physical properties of aluminum make it one of the best materials for the manufacturing of parts. It has an outside layer of oxidized, having corrosion resistance. Aluminum is a sturdy material, and for this sturdiness, it is the best for mechanical parts. It can help for improving the CNC machining and turning process and offers good machinability. Due to aluminum’s unlimited benefits, it uses various industries such as consumer electronics, medical, aerospace, and automotive industries. Some significant advantages of aluminum are:

     Accessible to machine & high corrosion resistance

     Lightweight & high strength

     Have good electrical conductivity

     Have high recyclability & good anodized potential.

3: Stainless Steel

Stainless steel alloy requires careful machining and tooling for its maintenance. Therefore experts engineers who have excellent knowledge of stainless steel can give you the best parts with stainless steel alloy. It is one of the famous materials use for parts manufacturing, and you can achieve high productivity. Working with stainless steel is not an easy job; that’s why you may find it challenging to find the most qualified service-providing companies for stainless steel alloy. It has high flexibility and strength. It also has increased repeatability and accuracy. Some types of stainless steel alloy are:

     Alloy 302,2303,and 304

     Alloy 400 series & 17-ph stainless steel

Many industries use stainless steel, such as mining, construction, military, transportation, automotive and industrial industries. Some primary applications of stainless steel are:

     Pressure tank & Cables

     Marine parts & Automotive parts

     Electronic components & Medical devices

     Handles & Engine parts

     Lab instrument & Weld ferrules

4: Titanium

Titanium is the most common material. Its popularity is its elasticity, high strength, ease to the machine, and many surface treatment options.

CNC turning of titanium carries out with various tools and equipment that have 3 and 4 axes. You can use the vertical and horizontal mill, turning centers, and tool grinders. CNC turning of titanium can carry out various operations such as drilling, knurling, parting, and grooving. You can use a wide variety of titanium alloy and grade use for this process. Some commonly use grades and alloy is titanium grade 1-4, grade 5, and grade 9 that most widely can use in the CNC turning of titanium. Some titanium parts are:

     Engine parts & Heat exchanger

     Machine frame & Routers

     Medical prostheses & Compressor blade

     Aircraft engine parts & Orthopedic implant

     Wheelchair & Hip replacement

5: Steel Alloy

CNC turning of steel alloy carries out with CNC mill, vertical and horizontal mill, CNC turning centers, and tool room lathe equipment. You can manufacture steel alloy parts by precision machining and can produce high-quality steel alloy parts. Operations that can use for steel alloy parts production are threading, boring, grooving, parting, and knurling. Some grades of steel alloy are

   Carbon steel

   Mild steel

   Low and high alloy steel

   Plain carbon steel


These four grades most commonly can use for the CNC turning of steel alloy. Alloy steel 4140 has excellent toughness and good strength. It is not suitable for welding, but it ideal for various industrial applications. 

Surface treatment

CNC turning parts has smooth surface finishing.  But subtractive CNC may cause to produce minor tool marks on the surface of the piece. So you have to choose various finishing treatment methods to improve the visual properties, roughness, and wear resistance for the CNC turning parts. You may consider the best surface finish for your objects, and some common use surface treatments are:

  1. Bead blasting
  1. Powder coating
  2. Tinted
  3. Paint
  4. As- Machined
  1. Sandblasting
  2. Anodizing Type II and III
  3. Metalizing


Surface finish can improve the solderability, hardness, conductivity, and appearance of CNC-turning machined parts. You can get your desired look and shape of your pieces after the surface treatment. Skilled experts can provide you with high-quality surface treatments, so select the best company to give you quality surface finishing service for the CNC turning parts.


Bead blasting

  • Bead blasting can use for visual design, and these parts have a light texture and matte finish.

Powder coating

  • Powder coating can use for any material. It has high impact resistance and can add corrosion resistance and wear finish to the CNC turning parts.


  • Tinted is a method to color plastic prototypes, and it is an excellent alternative method for tail lamps and turn signals. ABS, PS, and PC are suitable materials for tinted.


  • Paint is one of the flexible methods use for surface treatment. You can get satin, high gloss, soft touch, and matt finish with the painting process.


  • As machined standard surface roughness is 3.2 μm and it can use for the miner tool marks.


  • Sandblasting can apply to remove the printing and cutting marks from the CNC turning parts. You can get a smooth finish with sandblasting.


  • Anodizing type ll adds a ceramic layer to the part surface, and it can dye in various colors. Anodizing Type III applies to titanium and aluminum.


  • Metallizing and chromed finish create a protective layer. It also gives a great look at the turning parts.

Part 4

Cost reduction tips

Although most producers follow the basic principles of edge welded bellows manufacturing. But only we understand the unique qualities and exceptional performance characteristics. That go into creating a superior product. thus, we practice a more rigorous manufacturing process to the most exacting standards.

Are you wondering how to reduce of cost of CNC turning and machining? You can find some valuable suggestions and tips to reduce the cost. A slight modification in your design can make your parts cost-effective. Various factors can affect and increase the cost of CNC turning parts. Material, finishes, time, part geometry, and tolerance are some main factors that can affect CNC parts’ cost. So make sure you know all about these factors before starting your project. By applying some proven cost reduction tips, you can enable to reduce the cost to some extent.

Some cost reduction tips are as following:

1: Don’t choose high detailed & complex parts geometry

Complex and high complicated parts need multiple machines and processes for their manufacturing. So turning part geometry can increase setup, fixture, and programming cost and consider parts production factors. Part’s dimension, complexity, and size can significantly impact the manufacturing process’s overall cost.

2: Minimize deep pockets

Deep pockets, often call as internal cavities, can also affect the cost of CNC turning and machining. To get the deep cavities, you have to remove a lot of material, and it also requires specific tooling to get the required depth for the cavity. These deep pockets require long timing and also prove challenging to remove chips. Tools that need for the creation of these cavities may break. Try to keep your cavity depth a maximum of four times to the length of your part. So minimizing deep pockets may prove less costly for your project.

3: Avoid unnecessary tight tolerance for material

Tight tolerance can increase time and manual machining and ultimately increases the cost of CNC turning parts production. Tight tolerance doesn’t require all parts; only numerically, callouts have tight tolerance requirements. You can prefer standard tolerance +/-0.127mm for the features of the less important role. Decimal points are essential in your dimension. You should reduce the unimportant and extra decimal points, and it will also reduce the cost of your part. More decimal

places mean more complex features, and it will be more costly than other parts having fewer decimal places. So they are critically important in affecting your part’s price, and you can decrease your parts’ costs by reducing decimal points and areas.

4: Avoid multiple surface finishes and consider as-machined for your parts

Surface finishes can improve the appearance of your parts and also can increase the cost of parts. It also protects your part against the harsh environment. Multiple and unnecessary surface finishes can make your parts more costly. Heat treatment, anodizing and special coating are also some of the main factors for the cost increment. So select the as- machined for your parts and use multiple surface finishes for the necessary parts.

5: Increase the wall thickness

The thin wall is not the right decision for CNC turning and machining. Light wall parts are fragile and require more machining time and multiple passes for their machining. A thin wall causes distortion, which makes thin-wall parts difficult for tolerance maintenance, and the thin wall can slow down the machining and increase the cost of your pieces. To minimize your parts’ cost, choose the design wall thickness for your metal parts than 0.8 mm, and for the plastic parts, it should more than 1.5 mm. Thick wall proves more stable and less costly than thin-wall parts, so try to consider this point when you want to reduce your parts’ cost.

6: Optimize your material

The material can affect the price of your parts, so choose it according to your budget. Make sure you are selecting the suitable material for your job. Soft materials prove less costly as it is easy to cut and machine. It also requires less time for CNC machining and turning. On the contrary, the rigid material may prove more costly because it is difficult to cut and machine the hard material. You require more operational time for complex material, and it extends the cost of the production. Risky material can also prove more costly because it needs extra safety and precautionary measures to the machine and operate this material, and it also increases cost. Optimization of material is suitable for cost reduction.

7: Don’t use small feature having a high aspect ratio

Small features having a high aspect ratio are not easy to operate, and they also prone to vibration. Therefore these parts are more costly, and you should select a design feature with less than a four aspect ratio to minimize the cost. You can also connect a minor component to a wall or add bracing support for improving its stiffness. Try to avoid the small features with a high aspect ratio for minimizing your cost of parts manufacturing.

8: Try to avoid text & lettering

Don’t use text and lettering on the part’s surface as it proves more costly for your parts. It requires additional and lengthy steps and also increases the price of your part. Painting and silk screening are less expensive to add text and lettering on the surface of machined parts. It can remove the text and lettering from parts and try to choose the font size 20. Engraving over embossed text and lettering are proving effective in minimizing the cost of machined parts.

9: Quantity & turnout time

Quantity and turnout time have a significant effect on CNC machine parts, and an increase in quality will become a decrease in cost. 1 to 5 increase in quantity decreases the price of the unit by more than 50%. So order a large amount and placing a repeat order can reduce the cost of the machining process. Delivery time can also affect your project cost. If your part shipped within 2 or 3 days, they would become more costly than those shipped after a week. So you can select turnout delivery time that proves cost-effective for your machined parts.

10: Adjust rounded internal corner

Additional steps such as 90 degrees and sharp corners require more machining time, and you have to pay more money for performing these steps. Therefore some changes and modifications in the internal corner design have a positive impact on your part cost. Try to include a rounded inner corner and maintain the same radii for all your internal corners. It will decrease the machining time and cost.

Except for all these tips, some other points such as adding a radius in the inner vertical edge, depth cavity limitation, thread length limitation, standard tap hole, and drill size and design accuracy should consider the cost reduction of CNC machining and turning parts.  

Part 5

Start CNC Turning

  • Before submitting your order, make sure some essential clarification.

    1: Do you have the basic knowledge of tolerance and know how to use geometric dimensions for your parts?

    2: Is your part optimize for machinability?

    3: Can you get the full functionality of your parts by removing some features in your model?

    4: Can you modify your design? Is any other cheap material that can meet your needs?

    5: How can you eliminate the particular tooling cost and cost of multiple machine setups?

    When you get the positive answer to these questions, as mentioned above, you can start CNC turning.

    Your selective design should be in a compatible CAD file format. The company can use these files for opensource, and you have another option you can upload the file and get a free quote for your design.

    We are the best CNC turning parts manufacturer, and you can trust us for exceptional services. Our CNC turned parts have superior quality and second to none. We can help you at each step of production by identifying material from the shipment to your location.

    We can fully understand your perspective and can offer you quality products. If you need more information about CNC turning parts manufacturing, Contact us today and send your requirements. Our skilled engineers will review and help you with the best method and material. At Lanli Technology, we offer the latest technology, short lead time, fast response, and superior quality products.

Part 6

What can CNC Turning process do?

CNC Turning is used to produce rotational, typically axisymmetric, parts that have many features, such as holes, grooves, threads, tapers, various diameter steps, and even contoured surfaces. The turning machines can produce the followings:

  • Prototypes


  • Fittings


  • Shafts


  • Spacers


  • Bushings


  • And more

CNC Turning advantage

CNC Turning is a complex and detailed method of creating customized parts and components using a turning lathe. which is used to make rotational parts by cutting away unwanted material.

  • Tight precision of CNC turning is our most competitive advantages. Our machines can follow strict features and eliminate the waste of human errors.


  • The turning centres have flexibility diverse applications, which offer a range of size capabilities.


  • CNC turning provides exceptional repeatability. Which maximize its output and reduce its costs.