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Styli for Probes
ID：Styli
A stylus is the part of the measuring system which makes contact with the component, causing the probe's mechanism to displace. The generated signal enables a measurement to be taken. The feature to be inspected dictates the type and size of stylus used. In all cases, however, maximum rigidity of the stylus and perfect sphericity of the tip are vital.
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Straight styli
For simple features with which direct contact can be made.
Star styli
For surfaces and holes with which direct contact can be made. This configuration gives flexibility, enabling the tip to make contact with different features without changing the stylus.
Swivel styli
For angled surfaces and angled holes, this configuration gives flexibility, enabling you to make contact with different features without changing the stylus.
Disc styli
These styli are used to probe undercuts and grooves within bores, which may be inaccessible to star styli. Probing with the ‘spherical edge' of a simple disc is effectively the same as probing on or about the equator of a large stylus ball. However, only a small area of this ball surface is available for contact and hence thinner discs require angular alignment in order to ensure correct contact with the feature being probed.
Semi-spherical disc styli
Also for undercuts, stepped bores and grooves within bores. Using the hemispheres above and below you can also measure in the Z direction e.g. to measure the width of a groove.
Cylinder styli
For measuring sheet metal, pressed components and thin work pieces with which proper contact cannot be guaranteed with ball styli. In addition, various threaded features can be probed and the centres of tapped holes located. Ball-ended cylinder styli allow full datuming and probing in X, Y and Z directions, thus allowing surface inspection to be performed.
Ceramic hemispherical styli
For measuring deep features and bores. Suitable also for contact with rough surfaces, as the roughness is mechanically filtered out by the large diameter surface.
Adaptor plates
If you need to measure certain features repeatedly, it is a good idea to set up the required styli configurations on adaptor plates.
Extensions
Extensions are used for measuring very deep features and bores, or probing points that are difficult to access.
Accessories
Bodies and cubes - Combine to create specific styli configurations.
Knuckles - The angular alignment of the probe component for making vertical contact with angled work piece surfaces or angled holes. -
Renishaw precision styli
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