CMM styli & probe accessories
ITP Styli Touch Every Feature.
1,367 ITP lines from Protool for CMM probes: straight, star, disc, cylinder and hemispherical styli, extensions, adaptors and holders, and calibration accessories, in M2, M3, M4, M5 and M6 threads and the M3 XXT thread.
The ITP range
Shop ITP Styli by Type
Start with the stylus that reaches the feature, then add the extensions, adaptors and holders to build the probe configuration.
902Straight Styli
Ball tipped styli for most features, in ruby, silicon nitride, zirconia, carbide, ceramic and diamond coated.
Shop straight styli
42Star Styli
Probe bores, slots and undercuts in several directions without changing the stylus.
Shop star styli
58Disc Styli
A section of a large sphere for undercuts, grooves and large inside features.
Shop disc styli
16Cylinder Styli
For holes in thin material and edges a ball cannot reach squarely.
Shop cylinder styli
8Hemispherical Styli
A large ball diameter with less weight, for deep features and rough surfaces.
Shop hemispherical styli
192Extensions
Add reach to get into deep features, in titanium, carbon fibre, stainless steel, aluminium and ceramic.
Shop extensions
125Adaptors & Holders
Build multi-stylus configurations and adapt between thread sizes.
Shop adaptors
17Adaptor Plates
Stylus change plates to swap probe configurations quickly.
Shop adaptor plates
24Accessories
Calibration spheres, clamping screws, stylus tools and thread measuring gauges.
Shop accessoriesChoose ball and stem
ITP Stylus Materials
The ball material is in every stylus title; pick it for the material you are measuring. Then pick a stem stiff enough for the length.
| Material | Used for | Choose it when |
|---|---|---|
| Ruby | Ball | The standard choice. Very hard and smooth, for most materials. |
| Silicon nitride | Ball | For aluminium, where ruby can pick up material when scanning. |
| Zirconia | Ball | For cast iron and scanning work, where it resists wear. |
| Diamond coated | Ball | For abrasive materials such as composites, where other balls wear quickly. |
| Ceramic | Large ball | Large, light balls from 12mm for big features and rough surfaces. |
| Carbide | Stem | Stiff stems that keep small styli accurate. |
| Carbon fibre | Stem and extension | Light and stiff, for long styli and extensions. |
| Titanium, stainless, aluminium | Stem, extension and base | Strong, light parts for extensions, adaptors and holders. |
Build the configuration
ITP Adaptors, Holders and Accessories
Everything between the probe and the stylus, and the spares and references to keep it accurate.
| Part | What it does | Shop |
|---|---|---|
| Adaptor plates | Stylus change plates, Vast M5 and XXT M3 | Shop |
| Cubes | Mount several styli at right angles to each other | Shop |
| Knuckles & rotary adaptors | Set a stylus at an angle | KnucklesRotary adaptors |
| Thread adaptors | Fit a stylus with one thread to a probe with another | Shop |
| Styli holders | Holders for threaded and non-threaded styli | ThreadedNon-threaded |
| Plate extensions | Extensions for stylus change plates, M5 | Shop |
| Calibration spheres | Reference spheres to qualify the stylus, 15 to 30mm | Shop |
| Clamping screws & tools | Spare screws and stylus tools | ScrewsTools |
| Thread measuring gauges | For measuring threads on the CMM | Shop |
Choosing a stylus
Choose an ITP Stylus in Four Steps
A short, stiff stylus with the largest ball that fits gives the most accurate result.
- 1
Thread
Match the thread on the probe or stylus module: M2, M3, M4, M5, M6, or M3 XXT.
- 2
Reach
Choose the shortest stylus that reaches the feature. Add an extension only where you need the depth.
- 3
Ball
Pick the largest ball that fits the feature, in a material that suits the part.
- 4
Stem
Carbide for short, stiff styli; carbon fibre or ceramic for long, light ones.
Questions
ITP Styli: Common Questions
What is a CMM stylus?
The stylus is the part of a coordinate measuring machine probe that touches the workpiece. It screws into the probe, and its ball or tip makes contact with the part so the machine can record each point.
Ruby or silicon nitride?
Ruby is the standard ball material for most work. For aluminium, choose silicon nitride: when scanning aluminium, material can stick to a ruby ball. For cast iron, zirconia resists wear better.
Which thread do I need?
Check the thread on your probe or stylus module. ITP styli come in M2, M3, M4, M5 and M6, and in the M3 XXT thread used on XXT probe heads. Thread adaptors let you fit a stylus with one thread to a probe with another.
Why choose a carbon fibre or ceramic stem?
Long styli need to be stiff but light, or they bend and reduce accuracy. Carbon fibre and ceramic stems are stiff and light, so they suit long styli and extensions. Carbide stems are the stiffest choice for shorter styli.
What is a calibration sphere for?
A calibration sphere is a precise reference ball fixed on the CMM table. The machine measures it to qualify each stylus before measuring parts. ITP spheres come in 15, 20, 25 and 30mm.
Not Sure Which Stylus You Need?
Send us your probe, the thread and the feature you are measuring, and we will help you choose the stylus and any adaptors.
