| Permissible deviations in mm for ranges in nominal lengths | Tolerance class:designation (description) | |||
|---|---|---|---|---|
| f (fine) | m (medium) | c (coarse) | ||
| Linear Dimensions | ||||
| 0.5 up to 3 | ±0.05 | ±0.1 | ±0.2 | |
| over 3 up to 6 | ±0.05 | ±0.1 | ±0.3 | |
| over 6 up to 30 | ±0.1 | ±0.2 | ±0.5 | |
| over 30 up to 120 | ±0.15 | ±0.3 | ±0.8 | |
| over 120 up to 400 | ±0.2 | ±0.5 | ±1.2 | |
| over 400 up to 1000 | ±0.3 | ±0.8 | ±2.0 | |
| over 1000 up to 2000 | ±0.5 | ±1.2 | ±3.0 | |
| over 2000 up to 4000 | - | ±2.0 | ±4.0 | |
| External Radius and Chamfer Heights | ||||
| 0.5 up to 3 | ±0.2 | ±0.2 | ±0.4 | |
| over 3 up to 6 | ±0.5 | ±0.5 | ±1.0 | |
| over 6 | ±1.0 | ±1.0 | ±2.0 | |
| Angular Dimensions | ||||
| up to 10 | ±1º | ±1º | ±1º30' | |
| over 10 up to 50 | ±0º30' | ±0º30' | ±1º | |
| over 50 up to 120 | ±0º20' | ±0º20' | ±0º30' | |
| over 120 up to 400 | ±0º10' | ±0º10' | ±0º15' | |
| over 400 | ±0º5' | ±0º5' | ±0º10' | |
A：Shaft-type parts (most common): drive shafts, motor shafts, valve cores, stepped shafts, linear shafts, threaded shafts
Bushing / sleeve-type parts (hollow rotational parts): bearing sleeves, bushings, tubes, cylinder sleeves, nuts (with internal thread), hollow pipe fittings
Also suitable for disc / flange parts, threaded parts (internal & external threads), and complex curved turning components.
The core advantage of CNC turning lies in high-precision and high-efficiency machining of rotationally symmetric parts, especially for batch production where dimensional consistency and surface finish are critical.
For non-rotational or asymmetric parts — such as square, polygonal, irregular surfaces or parts with complex/deep cavities — CNC turn-mill machining is recommended to achieve integrated and efficient manufacturing.
A: Machining Principle:
CNC turning involves a rotating workpiece with a stationary cutting tool, ideal for producing rotationally symmetric parts (shafts, sleeves, discs).
CNC milling uses a rotating cutting tool while the workpiece moves, focusing on non-rotational or complex geometry parts (housings, brackets, irregular shapes).
Machining Targets:
CNC Turning: cylindrical parts with round cross-sections (e.g. motor shafts, bearing sleeves).
CNC Milling: flat surfaces, slots, holes, and curved features (e.g. machine brackets, gearbox housings).
A：Yes, we are fully capable of producing plastic turned parts. Common plastics processed on our CNC lathes include ABS, polycarbonate, PTFE (Teflon), nylon, and POM.
5-Axis CNC Machining Services simplify complex part production by reducing setups, improving accuracy, and enabling efficient machining of difficult geometries.
Learn how 3-axis, 4-axis, and 5-axis CNC machining differ in setup, geometry, accuracy, cost, and applications to choose the right process.
A practical look at how a digital part design becomes a finished CNC component through engineering review, programming, machining, inspection, and finishing.
