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Mastering Canned Cycles: In-Depth Turning CNC Examples and Best Practices


Canned cycles are a simple and efficient way to automate repetitive CNC machining operations. They can save time and effort by reducing the amount of code needed for complex operations, as well as providing a more consistent approach to machining. In this blog post, we'll explore various canned cycle turning CNC examples, offering practical tips and techniques to elevate your CNC machining skills.

What are Canned Cycles?

Canned cycles are pre-programmed routines within a CNC machine's control system designed to automate specific machining processes. These standardized routines simplify programming and can help to improve machining efficiency and consistency. Some common examples include drilling, boring, tapping, and turning operations.

Types of Canned Cycles for Turning CNC

For turning CNC, there are several canned cycles for different operations, which usually include:

1. Rough Turning Cycle (G71): This cycle is used for roughing operations, removing material from the workpiece to a specified depth in multiple passes.

2. Finish Turning Cycle (G70): Once the roughing process is complete, the G70 cycle is used to finish the workpiece by cutting to its final shape.

3. Groove Cutting Cycle (G74 & G75): These two cycles cater to grooving operations in both the X and Z-axis, respectively.

4. Threading Cycle (G76): This cycle is responsible for creating internal or external threads on a workpiece.

5. Boring Cycle (G85): G85 is a canned cycle designed to automate the boring process, producing precise holes in workpieces.

Canned Cycle Turning CNC Examples

Let's now dive into some practical examples of canned cycles for CNC turning operations:

Example 1: Rough Turning and Finish Turning

Here's a simple example that demonstrates the use of G71 and G70 for rough and finish turning:

O0001 (Program number)T0101 (Select tool 1 and offset 1)G97 S500 M3 (Spindle speed 500 RPM in a clockwise direction)G00 X30 Z2 (Initial positioning - rapid traverse to X30 and Z2)G71 P10 Q20 U2 W0.1 F0.2 (Rough turning cycle parameters)G70 P10 Q20 (Finish turning cycle parameters)M30 (End of program)%N10 G00 X40 Z0.5 (Rough cutting profile starting point)N20 G01 X32 Z-1.0 (Cutting movement)N30 X24 Z-3.0N40 X20 Z-5.0N50 X12 Z-7.0N60 G00 X40 (Return to the starting point)N70 G01 Z-8.0 (Final shape cutting)

Example 2: Groove Cutting

An example using G74 and G75 for grooving operations:

O0002 (Program number)T0201 (Select tool 2 and offset 1)G97 S500 M3 (Spindle speed 500 RPM in a clockwise direction)G00 X25 Z0 (Initial positioning)G74 X20 Z-5.0 P3000 Q1200 F0.2 (Groove cutting cycle parameters in the Z-axis)G00 X50 Z50 (Move the tool away from the workpiece)M30 (End of program)%

Example 3: Threading

Below is a simple example for the G76 threading cycle:

O0003 (Program number)T0301 (Select tool 3 and offset 1)G97 S1000 M3 (Spindle speed 1000 RPM in clockwise direction)G00 X50 Z2 (Initial positioning)G76 Z-20 P1000 Q500 F2 (Threading cycle parameters - pitch, depth, and feed rate)G00 X50 Z50 (Move the tool away from the workpiece)M30 (End of program)%

Tips and Best Practices

To make the most of canned cycles in CNC turning operations, consider these best practices:

1. Optimize tool path: Design the tool path to minimize non-cutting movements, which can help reduce machining time.

2. Choose the right cutting speed and feed rate: Consider the material, tooling, and machine capabilities for optimal cutting parameters.

3. Familiarize yourself with G-code: Although canned cycles simplify programming, it's essential to understand G-code for better control and customization of your machining processes.

4. Test your program: Always run a simulation or dry run to verify the tool path, parameters, and accuracy of your canned cycle program.

5. Ensure proper cutting conditions: Ensure that your workpiece is properly fixtured, and maintain sufficient coolant flow during the machining process.

By understanding these canned cycle turning CNC examples and following best practices, you can enhance your CNC turning operations, reduce errors, and increase productivity.

canned cycle turning cnc examples

What is CNC Turning

CNC turning is a process that involves using computer numerical control (CNC) machines to shape and finish various materials, such as metals and plastics, into desired shapes and sizes.
This process is typically used in the manufacturing industry to produce precision parts and components for a wide range of applications, including automotive, automation, aerospace, medical, machinery, and industrial.

CNC Turning service

Asianstar Professional CNC Turning Service

Asianstar CNC turning Service offers precision machining for a wide range of materials, including metals, plastics, and composites. With high level facilities and skillful operators, we can produce high-quality parts with tight tolerances and intricate designs.

Our CNC turning capabilities allow us to produce parts with diameters ranging from 0.5 mm to 480mm and lengths up to 450mm. We offer both single and multi-axis turning, as well as live tooling options for added complexity and accuracy.

We use proven processes and quality control measures to ensure that every part we produce meets our clients' specifications and expectations.

Whether you need a single prototype or high-volume production runs, our CNC turning service can provide the precision and reliability you need to get your project completed on time and on budget.

CNC Turning service

Components Sizes of Asianstar CNC Turning Service

Unit (mm) Min Max
Out Diameter 0.5 480
Inner Diameter (Hole) 0.3 465
Length 1.0 450
Groove Diameter 0.4 above
Thread M1.2 above

Components Tolerance of Asianstar CNC Turning Service

Unit (mm) Tolerance according to sizes
Height Tolerance Diameter Size 0.5 to 3 3 to 6 6 to 30 30 to 120 120 to300 300 to480
Tolerance ±0.003 ±0.010 ±0.020 ±0.030 ±0.035 ±0.040
Length Tolerance Length Size 0.5 to 3 3 to 6 6 to 10 10 to 20 20 to 30 30 above
Tolerance ±0.010 ±0.020 ±0.250 ±0.250 ±0.030 ±0.035

Components shape and position tolerance of Asianstar CNC Turning Service

Tolerance Class followed Tolerance (mm)
Straightness and Flatness Verticality Symmetry
10 10 to 30 30 to 100 100 to 300 300 to 1000 1000 to 3000 to 100 100 to 300 300 to 1000 1000 to 3000 to 100 100 to 300 300 to 1000 1000 to 3000
H ±0.015 ±0.02 ±0.03 ±0.05 ±0.10 ±0.15 ±0.02 ±0.025 ±0.03 ±0.035 ±0.02 ±0.03 ±0.04 ±0.05

Capability of Asianstar CNC Turning Service

Type of Turning Machine Diameter Size (mm) Length Size (mm) Productivity (PCS/Month)
Auto Turning Machine Simple Turning Machine Multi Turning Machine Pin Turning Machine Min 0.5 Max 480 Min 1.0 Max 450 200’000/Item


Multiple Machining Processes

Multiple Machining Processes

Asianstar has various machining processes to support different types of components from client, we can choose the best suitable manufacturing solution to carry result in perfect performance and cheap cost

Flexible Custom Service

Flexible Custom Service

With skillful machining technologies, Asianstar is flexible to support clients on different materials and different structures of the components, we also flexible on the components quantities and even assembly

Create Designing for Clients

Create Designing for Clients

Not only producing according to clients drawings, Asianstar also propose the better designing to clients, supporting clients to buildup improved designing or even new generation components

Standard Procedures

Standard Procedures

Asianstar production, as experienced by many years, is strictly following internal Standard Operating Procedures, to make sure the production schedule is smooth and plans are well carried out well without accidents

Standard Procedures

Standard Procedures

Asianstar strictly controlling product quality by system. We start QC controlling from production plan once setting up, to production process by monitoring QC checking and until the final Inspection before packing

Fast Lead-Time Delivery

Fast Lead-Time Delivery

Asianstar strictly control the production processes, teams keep the plan moving ahead according to the procedures, we have internal time management schedule which mostly bring earlier lead-time of delivery

Asianstar: Professional CNC Machining Supplier

From year of 2005, Asianstar Company establish the CNC Machining Factory in Guangdong Province, China.
We mostly provide CNC Turning, Milling, Drilling, Grinding, and Multi Machining processes service on various materials.
With the Belief of becoming a key supplier in the supply-chain of Precision Components, we strictly control our product quality, keep high precision on our components production, buildup the whole-process QC System and submit the satisfaction for every order.
By long term development, we have buildup partnership with world-wide clients, supporting our partners in Designing, Optimizing, Producing and Testing on each type of components.


CNC Turning Service

CNC Turning Service

Our CNC Turning Service provides different sizes of roll shape work-pieces, the diameter range is from 0.5mm to 480mm, reaching tolerance +/-0.003mm.

CNC Milling Service

CNC Milling Service

Our milling machines and CNC centers are able to produce complicated structure part, five-axis devices produce multi-sides at one-time jag which bring high precision result

Sheet Metal Fabrication

Sheet Metal Fabrication

Our Sheet Metal Fabrication provides slicing, punching, bending, welding, painting and assembling for set products, unique tooling for each project to raise production efficiency

Aluminum Extrusion

Aluminum Extrusion

Our Aluminum Extrusion brings clients various shapes of aluminum parts, high efficiency for mass quantity, our precision extrusion mold control tolerance within 0.01mm

Forging Service

Forging Service

For some steel serious products, we apply Forging Service to make out their outer shape and them use CNC devices to start drilling, forming, rolling, cutting, etc.

Finishing Service

Finishing Service

Our Surface Finishing Service uses chemical or electro post-treatments after machining tasks are finished, normally includes Oxide, Anodizing, Passivation, E-Plating, Painting,etc.


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    Yes, we support ODM/OEM, we provide custom-made service for clients or even support clients on designing or improving

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