Stylus: Stylus Length 20 mm to 500 mm

Component Specifications

Definition

A stylus is a slender, rigid component of a touch-trigger probe system on coordinate measuring machines (CMMs) and machine tools. It serves as the physical interface that makes contact with the workpiece surface during dimensional inspection. When the stylus tip deflects upon contact, it triggers a signal to the probe head, recording the precise coordinate position. Styluses are designed for minimal deflection, high repeatability, and geometric accuracy to ensure measurement integrity across various materials and surface conditions.

Working Principle

The stylus operates on mechanical deflection and electrical triggering. When the stylus tip contacts a workpiece, it causes a slight deflection in the probe's suspension mechanism (e.g., kinematic mount or strain gauges). This deflection closes an electrical circuit or alters a signal, generating a trigger pulse. The CMM or machine tool controller captures the machine's position at that instant, recording the measurement point. The stylus must return precisely to its neutral position after each contact to maintain accuracy.

Materials

Common materials include tungsten carbide for the shaft (high stiffness, wear resistance), ruby or sapphire for the ball tip (hardness, low friction, corrosion resistance), and stainless steel for shanks and threads. Ceramic and silicon nitride are also used for specialized applications requiring electrical insulation or thermal stability.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Thread Type	M2, M3, M4, or proprietary (e.g., Renishaw PH10)
Tip Diameter	0.3 mm to 8 mm (common range)
Repeatability	<0.1 µm (for high-precision models)
Stylus Length	20 mm to 500 mm
Shank Diameter	3 mm, 4 mm, 6 mm (standard)
Bending Strength	>50 N/mm (varies by material)
Max Operating Speed	Up to 500 mm/s

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 10360, ISO 15530, DIN 32877

Parent Products

This component is used in the following industrial products

Touch-Trigger Probe

A precision sensor component used in coordinate measuring machines (CMMs) that detects physical contact with a workpiece to initiate measurement data capture.

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Engineering Analysis

Risks & Mitigation

Tip wear leading to measurement drift
Bending or breakage from excessive force
Contamination affecting trigger accuracy
Thermal expansion in varying environments

FMEA Triads

Trigger: Abrasive workpiece surfaces or high-frequency use
Failure: Tip wear causes increased effective diameter, leading to measurement errors
Mitigation: Use harder tip materials (e.g., ruby), regular calibration, and replace stylus based on usage cycles

Trigger: Improper setup or collision during machine movement
Failure: Stylus bending or breakage, resulting in probe damage and downtime
Mitigation: Implement collision avoidance software, use breakaway modules, and train operators on safe practices

Trigger: Dust, coolant, or oil accumulation on the stylus
Failure: False triggers or delayed signals, reducing measurement repeatability
Mitigation: Apply protective covers, use air purge systems, and perform regular cleaning

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Tip sphericity: ≤0.1 µm, shaft straightness: ≤1 µm/100 mm

Test Method

Laser interferometry for dimensional accuracy, repeatability tests per ISO 10360, and material hardness testing per ASTM E384

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Stylus

Manufacturer profiles associated with Stylus.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the purpose of a stylus in a touch-trigger probe?

The stylus physically contacts the workpiece to trigger measurement points, enabling dimensional inspection on CMMs or machine tools.

How do I select the right stylus for my application?

Consider tip diameter (for feature access), length (for reach), material (for wear and compatibility), and stiffness based on measurement speed and accuracy requirements.

Can styluses be interchanged between different probe brands?

No, styluses are often brand-specific due to thread and interface differences, though adapters may allow some cross-compatibility.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Stylus