Renishaw M3 threaded stylus range

Selling M3 stylus for probe head.

A FULL RANGE OF STYLI FOR ALL APPLICATIONS

Renishaw M3 threaded stylus range

Renishaw's probing systems are designed to give optimum performance using styli from Renishaw's comprehensive range. The following probes all use M3 threaded styli, however with suitable adaptors, other thread sizes may be used.

Accuracy at the point of contact
As industry has developed its requirement for increasingly diverse and complex manufactured parts, inspection systems have had to work hard to keep up. The use of co-ordinate measuring machines (CMMs) with probing systems and in-process inspection on machine tools are two of the solutions offered by Renishaw to help you maximise your productivity and maintain the highest quality.
Successful gauging depends very much on the ability of the probe’s stylus to access a feature and then maintain accuracy at the point of contact. At Renishaw, we have used our expertise in probe and stylus design to develop a comprehensive range of CMM and machine tool styli to offer you the greatest possible precision.
These notes explain the critical features of every stylus type, helping you to choose the right design for each inspection need.

Styli for probe sensors to Accuracy at the point of contact

Styli M3

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Overview

CHOOSING STYLI FOR INSPECTION

A few simple rules can be applied to maximize accuracy for most probing applications.

TERMINOLOGY

A = ball diameter
B = overall length
C = stem diameter
D = effective working length

OVERALL LENGTH

Renishaw uses a standard description of overall length, measured from the rear mounting face of the stylus to the centre of the ball.

EFFECTIVE WORKING LENGTH (EWL)

This is measured from the centre of the ball to the point at which the stem will foul against the feature when measuring 'normal' to the part.

RULES FOR CHOOSING A STYLUS

A few simple rules for stylus selection can be applied to maximize accuracy for most probing applications

KEEP STYLI SHORT

The more the stylus bends or deflects, the lower the accuracy. Probing with the minimum stylus length for your application is the best option.

MINIMISE JOINTS

Every time you join styli and extensions, you introduce potential bending and deflection points. Try, wherever possible, to keep to the minimum number of pieces possible for your application.

KEEP THE STYLUS BALL AS LARGE AS POSSIBLE

There are several reasons for this:
- it maximises your ball/stem clearance, thereby reducing the chance of false triggers caused by 'shanking out' on the stylus stem, and increasing the EWL;
- a larger ball allows a larger stem diameter, increasing the stiffness of the stylus;
- the larger ruby ball reduces the effect of the surface finish of the component being inspected.
EWL can also be affected by assembly tolerances. For this reason Renishaw styli are assembled to exacting standards in controlled conditions.