A2 Tool Steel has excellent wear resistance and toughness, commonly used to make fixtures, tools, tool holders, gauges, and punches.
Capabilities
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A2 Tool Steel
ABS
Acrylic
Aluminum
Brass
Bronze
Cast Iron
Copper
Delrin
Garolite G-10
HDPE
Nylon
PEEK
Polycarbonate
Polypropylene
PPS
PTFE
Stainless Steel
Steel
Titanium
UHMW
Ultem
A2 Tool Steel has excellent wear resistance and toughness, commonly used to make fixtures, tools, tool holders, gauges, and punches.
Physical and mechanical properties are not guaranteed. They are intended only as a basis for comparison and not for design purposes.
Download CNC Material DatasheetName | Applicable Materials | Colors | Can be applied with | |
---|---|---|---|---|
Alodine | Aluminum | Clear, gold | Media Blasting, Tumbling, Type II Anodizing* Type III Anodizing*, Type III Anodizing with PTFE* | |
Anodizing | Aluminum | Clear, black, grey, red, blue, gold | Media Blasting, Tumbling, Alodine* | |
Black Oxide | Steel, Stainless Steel | Black | Media Blasting, Tumbling, Passivation | |
Electroless Nickel Plating | Aluminum, Steel, Stainless Steel | — | Media Blasting, Tumbling | |
Electropolishing | Steel, Stainless Steel | — | — | |
Media Blasting | Aluminum, Steel, Stainless Steel, Brass, Bronze, Copper | — | All post processes except Electropolish and Powdercoat | |
Nickel Plating | Aluminum, Steel, Stainless Steel | — | Media Blasting, Tumbling | |
Passivation | Steel, Stainless Steel | — | Black Oxide, Electroless Nickel Plating, Zinc Plating, Tumbling, Media Blasting | |
Powder Coating | Aluminum, Steel, Stainless Steel | Black (20% or 90% gloss), white (20% or 90% gloss) | — | |
Tumbling | Aluminum, Steel, Stainless Steel, Brass, Bronze, Copper | — | All post processes except Electropolish and Powdercoat | |
Zinc Plating | Steel, Stainless Steel | Clear: light blue coating, black: glossy black coating | Media Blasting, Tumbling, Passivation |
* = requires masking
Metals, PEEK, And ULTEM With Drawing | Other Plastics With Drawing | No Drawing | |
---|---|---|---|
Linear Dimension | +/- 0.01 mm +/- 0.0003 inch | +/- 0.05 mm
+/- 0.002 inch | ISO 2768 Medium |
Hole Diameters (Not Reamed) | +/- 0.008 mm
+/- 0.0003 inch | +/- 0.05 mm +/- 0.002 inch | ISO 2768 Medium |
Shaft Diameters | +/- 0.004 mm
+/- 0.00016 inch | +/- 0.05 mm
+/- 0.002 inch | ISO 2768 Medium |
Part lengths of up to 48" available on our platform, process dependant. Please inquire about anything larger. Tolerances listed here are minimums for an ideal case. Looser tolerances may be required depending on process, material choice, or part geometry.
Download Tolerance Chart“Being able to use China Manufacturing parts, Inc. for gears is very exciting. We know they're going to hit their lead times and we're going to be in constant communication to see where our parts are in the supply chain.”
Andrew Willig
Mechanical Engineer, HEBI Robotics
+/- 0.0004" tolerances
6 weeks for 650 gears
China Manufacturing parts CNC Machining Advantages
Mid Stage Prototypes
Prototype CNC machining is an ideal process for mid-stage functional prototypes. China Manufacturing parts, Inc. can help you accelerate development cycles with rapid prototyping by providing instant online quotes, intelligent DFM feedback, and quick lead times.
Production Parts
Custom CNC machining is often leveraged for end-use production grade parts. China Manufacturing parts’s global manufacturing network is optimized for production machining, with volumes up to 1M units.
Production Tooling
Online CNC machining services are ideal for manufacturing components needed for production, including fixtures, jigs, gauges, molds, dies, cutting equipment, and patterns.
Technology Overview
CNC stands for computer numerical control. So, CNC machining is any kind of machining process controlled by a computer. Computerized automation allows parts to be made more quickly, accurately, precisely, and with more complex geometries than those produced via manual machining. CNC also reduces manual machining labor that would otherwise be done by humans. While they aren’t machining each part themselves, people are essential for programming and operating the machines, ensuring that every operation goes smoothly.
CNC, or computer numerical control machining, is a subtractive manufacturing method that leverages a combination of computerized controls and machine tools to remove layers from a solid block of material. The desired cuts in the metal are programmed according to corresponding tools and machinery, which perform the machining task in an automated fashion.
Depending on the type of part that needs to be machined, there are different types of CNC machines best fit for the job. CNC milling utilizes CNC mills, which consist of a multi-axis system (three, four, or five axes, depending on the part complexity). CNC turning involves Lathe machines, which generally have 2 axes and cut pieces using a circular motion. Electric discharge machines (EDM) utilize electrical sparks into order to mold work pieces into the desired shape. Hobbing is another type of machining process used for cutting gears, splines, and sprockets. Additional CNC machine types include plasma cutters and water jet cutters.
The programs used for CNC machining these days are written with G-code, and are usually automatically created by CAM software. CAM, or computer aided manufacturing software, generates the G-code for a 3D model with given tools and workpiece material. This G-code controls the CNC machines, i.e., the motion of the tool, the workpiece, and any tool changes. It even has commands to turn on or off the coolant and other auxiliary components.
CNC machining can be used for a wide variety of materials, with the most common being aluminum, steel, brass, ABS, Delrin, and nylon. But really, almost any hard material can be CNC machined. We’ll discuss materials more in depth later on.
Compared with parts manufacturing through additive methods, CNC machined parts are functionally stronger and typically have superior production quality and finish. Thus, CNC machining is typically used in the mid to late stages of development when parts are ready to be tested for functional accuracy.
While most of the details, such as tooling, spindle speed, cutter type, and depth of cut, and taken care of at the machine shop, there are some key things you can do while designing your parts to not only make sure they can be made, but also ensure you develop a lean product that doesn't break the bank.
The primary advantages of CNC machining include rapid prototyping and the ability to produce full-scale production parts quickly. It offers a high level of precision and accuracy in manufacturing parts and allows for tight tolerance machining for CNC parts of all sizes. It also offers maximum flexibility across volume, pricing, lead times, and the range of materials and finishes being used.
The two primary CNC machining processes are CNC turning and CNC milling. Other machining processes include drilling, gear hobbing and electrical discharge machining, among others.
Industries that use CNC machining include aerospace, automotive parts manufacturing, medical machine manufacturing, transportation, defense, and marine industries, along with oil and gas industries and electronics. CNC machining has allowed these industries to become more efficient at mass-producing custom CNC parts.
The standard machining tolerance is ± 0.005" or 0.13mm. Tolerances are the allowable range for a dimension. If a CNC machining tool has a tolerance of ± 0.01 mm this means that the machining tool can have a deviation of 0.01 mm in every cut. With a drawing, China Manufacturing parts's CNC machining service can produce CNC parts with tolerance as low as ± 0.0002 in. Without a drawing, all CNC parts are produced to our ISO 2768 medium standard. We can also machine to tighter tolerances, ±0.025mm or ±0.001", with an attached engineering drawing calling out critical features.
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