Styli

Styli


Renishaw styli are recommended in the measurement system using touch-trigger and continue scanning.
Renishaw styli are produced in a variety of sizes, using materials such as ruby, carbon fiber, titanium, zirconium, etc.

Styli

Styli

Styli

Straight styli

Straight stylusThese are suitable for the majority of probing applications. They incorporate highly spherical industrial ruby balls. Ruby is an extremely hard ceramic material and hence wear of stylus balls is minimised. It is also of low density keeping tip mass to a minimum which avoids unwanted probe triggers caused by machine motion or vibration. Ruby balls are available mounted on a variety of materials including non-magnetic stainless steel, ceramic and carbide, to maintain stiffness over the total range of styli.

Star styli

Star stylusThese can be used to inspect a variety of different features.
Using star styli to inspect the extreme points of internal features such as the sides or grooves in a bore, minimises the need to move the probe, due to their multi-tip probing capability.
Each tip on a star stylus requires datuming in the same manner as a single ball stylus.
Star styli are not recommended for use on machine tools.

Pointer styli

Pointer stylusThese should not be used for conventional XY probing as they have been designed for the measurement of thread forms, specific points and scribed lines (to lower accuracy). Using radius end pointer styli allows more accurate datuming and probing of features, and can also be used to inspect the location of very small holes.
Pointer styli are not generally recommended for use on machine tools.

Ceramic hollow ball styli

Hollow ball stylusThese are ideal for probing deep features and bores in X, Y and Z directions with the need to datum only one ball. In addition, the effects of very rough surfaces can be averaged out by probing with such a large diameter ball.

Disc styli

Disc stylus
These ‘thin sections’ of a large sphere are usually used to probe undercuts and grooves.
Although 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, only a small area of this ball surface is available for contact. Hence thinner discs require careful angular alignment to ensure correct contact of the disc surface with the feature being probed.
A simple disc requires datuming on only one diameter (usually in a ring gauge) but limits effective probing to only X and Y directions.
Adding a radius end roller allows you to datum and hence probe in the Z direction, providing the centre of the ‘radius end roller’ extends beyond the diameter of the probe.
The radius end roller can be datumed on a sphere or a slip gauge. Rotating and locking the disc about its centre axis allows the ‘radius end roller’ to be positioned to suit the application.
Disc may also have an M2 threaded centre to allow the fixing of a centre stylus, giving the additional flexibility of probing the bottom of deep bores (where access for the disc may be limited).
Disc styli are not generally recommended for use on machine tools.

Cylinder styli

Cylinder stylusThese are used for probing holes in thin sheet material, probing various threaded features and locating the centres of tapped holes.
Ball ended cylinder styli allow full datuming and probing in X, Y and Z directions thus allowing surface inspection to be carried out.

Tool datuming styli

Tool datuming stylusThe tolerances to which tools can be set depends upon the flatness and parallelism of the stylus tip to the machine axis. Fine adjustment is provided on all probes and probe holders to allow these settings to be achieved. Where rotating tools are to be datumed for diameter the tools must be rotated in reverse to the cutting direction.

Crash protection

Crash protection deviceRenishaw’s stylus crash protection devices are designed to break in the event of impact and protect the probe from damage

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