CNC Turning Machining Services CNC Steel Machined Part Stainless Steel Machining CNC Turning Parts
CNC Turned Stainless Steel Customised Construction Hardware Processing Part
Turning Steel Non Standard CNC Machining Services
CNC turning is a machining process that involves securing a rotating workpiece in a chuck or collet
while cutting tools are used to remove material, shaping the workpiece as desired.
This process is controlled by a computer numerical control (CNC) system, enabling precise operations
like turning, facing, threading, and grooving by moving the cutting tools along multiple axes.
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Materials Suitable for CNC Turning
The turning process primarily involves the machining of various metals.
These metals encompass a wide range of materials, including alloy steel, carbon steel, cast iron,
stainless steel, aluminum, copper, magnesium, and zinc.
Nevertheless, it is essential to note that the turning process is not limited to metals alone;
it can also be applied to plastic components and a diverse array of materials such as ceramics,
composites, thermoplastics, and thermosetting materials.
| Common Materials |
| Name | Description |
| Aluminum | High machinability and ductility, good strength-to-weight ratio. |
| Stainless steel | High tensile strength, corrosion and temperature resistant. |
| Mild steel | High machinability and weldability, high stiffness. |
| Brass | Low friction, excellent electrical conductivity, golden appearance. |
| Copper | Excellent thermal and electrical conductivity. |
| Titanium | Excellent strength to weight ratio, used in aerospace, automotive and medical industries. |
| POM | High stiffness, high accuracy, low friction, easy to machine. |
| ABS | Common thermoplastic, impact resistant, easy to machine. |
| Nylon | Excellent mechanical properties, thermal, chemical and abrasion resistant. |
| CNC Turning Tolerances |
| Limits for nominal size | Plastics | Metals |
| 0.5mm* to 3mm | ±0.1mm | ±0.05mm |
| Over 3mm to 6mm | ±0.1mm | ±0.05mm |
| Over 6mm to 30mm | ±0.2mm | ±0.10mm |
| Over 30mm to 120mm | ±0.3mm | ±0.15mm |
| Over 120mm to 400mm | ±0.5mm | ±0.20mm |
| Over 400mm to 1000mm | ±0.8mm | ±0.30mm |
| Over 1000mm to 2000mm | ±1.2mm | ±0.50mm |
| Over 2000mm to 4000mm | ±2.0mm | |
| *Please clearly indicate tolerances for nominal sizes below 0.5mm on your technical drawing. |
Typical Applications of CNC Turning
Turning is employed in the fabrication of rotational, predominantly axi-symmetric components
that encompass a myriad of features.
These features may include apertures, grooves, threads, tapers, varying diameter transitions,
and even intricately contoured surfaces. Products that are entirely manufactured through turning
are frequently comprised of components produced in limited quantities, particularly for prototypes.
Such components may include bespoke shafts and fasteners.
Moreover, turning is frequently utilized as a secondary process to introduce or enhance features on
components that were originally produced using alternative manufacturing techniques.
Illustrative examples of products that undergo the turning process encompass camshafts,
crankshafts, baseball bats, bowls, cue sticks, signage, musical instruments,
as well as table and chair legs.
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FAQ's
1. How long does a typical CNC turning process take?
The duration of a typical CNC turning process varies based on factors such as part complexity,
material type, tolerances, and machining operations. It can range from minutes to hours.
For projects with time constraints, lead times as short as 3 days.
2. Is CNC turning suitable for prototypes or large-scale production?
CNC turning is a versatile machining process suitable for producing both prototypes and large-scale
production runs.
It provides cost-effective manufacturing for large quantities of parts, while also offering the
flexibility to efficiently machine prototypes with rapid setup and easy programming adjustments.
3. Design Recommendations for Turned parts
1. Avoid designing long, thin structures
2. Consider specifying a desired surface roughness
3. Bored holes become difficult when the ratio between depth and diameter is high
4. Differences Between Rough Turning and Finish Turning
Rough turning and finish turning are two distinct phases in the CNC turning process:
1. Rough Turning: This phase focuses on material removal and shaping the workpiece, without
prioritizing accuracy or surface finish. It aims to get the workpiece close to the desired shape quickly.
2. Finish Turning: In this phase, the emphasis shifts to achieving precise dimensions and a smooth
surface finish. It "finishes" the workpiece to meet the desired accuracy and aesthetics.
These two stages work together to create CNC turned components with both the desired shape and
the necessary precision and surface quality.
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