What tolerance levels can CNC machining achieve for medical components?-JIUJU CNC

What tolerance levels can CNC machining achieve for medical components?

2025-02-28

CNC machining can achieve quite high tolerance levels for medical components. Here are the common tolerance levels in different aspects:

Linear Dimensions:

Tolerances can typically reach ±0.1 mm. In some high-precision machining scenarios, it is possible to achieve ±0.05 mm or even higher precision. For example, in the machining of some precision surgical instruments, such as scalpel handles and forceps, such precision can ensure their smooth operation and accurate use.

Diameter Dimensions:

For diameters with inserts, the tolerance can be controlled at +0.06 mm / -0.0 mm. For components like bone screws and suture anchors, which require high precision in diameter, CNC machining can meet the requirements well.

Angularity:

The angular tolerance can generally be controlled within ±2°. In the production of some medical device shells and components that require a specific angle, this accuracy can ensure the accuracy of their assembly and use.

Micro Tolerance Parts:

With the development of technology, 5-axis CNC machining can achieve tolerances as low as 0.005 mm, which is suitable for the production of some miniature and high-precision medical components, such as stents and some special dental implants.

Forming and Bending:

The tolerance for forming and bending is usually ±0.4 mm, and for simple bending operations, it can be controlled at ±0.2 mm. It should be noted that these tolerance levels are affected by many factors, including the accuracy of the CNC machine tool itself, the quality of the cutting tools, the properties of the materials being processed, the complexity of the part design, and the experience of the operators.

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Shape accuracy detection

In addition to dimensional accuracy, the shape accuracy of the parts cannot be ignored. Detect shape errors such as roundness, cylindricity, and flatness of parts using equipment such as roundness meters and contour meters. For example, when processing high-precision bearing rings, the accuracy of roundness and cylindricity directly affects the rotational accuracy and service life of the bearing.

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