Stylus shaft: Diameter 1.5-8 mm, Length 20-100 mm

Component Specifications

Definition

A cylindrical or tapered precision component that serves as the structural connection between the stylus tip and the probe body in tactile coordinate measuring systems. It transmits mechanical contact signals from the measurement tip to the probe's sensing mechanism while maintaining dimensional stability, rigidity, and alignment accuracy under measurement forces.

Working Principle

The stylus shaft functions as a rigid mechanical link that transfers contact forces from the measurement tip to the probe's deflection sensing system. When the stylus tip contacts a workpiece surface, minimal deflection occurs through the shaft, which is detected by strain gauges or optical sensors in the probe head, converting physical contact into precise coordinate data.

Materials

High-strength stainless steel (AISI 440C, 17-4PH), tungsten carbide, ceramic (zirconia), or titanium alloys. Surface finish: Ra ≤ 0.2 μm. Hardness: 58-62 HRC for steel, ≥85 HRA for carbide.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	20-100 mm
Weight	2-50 g
Diameter	1.5-8 mm
Max Load	0.1-1 N
Thread Type	M2, M3, M4, or proprietary quick-change
Straightness	≤2 μm/100 mm

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

Tactile probe stylus

A precision contact sensor component used for dimensional measurement and surface profiling.

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Measurement Probe (Stylus)

A precision contact sensor used on Coordinate Measuring Machines (CMMs) to physically touch and collect dimensional data from manufactured parts.

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Engineering Analysis

Risks & Mitigation

Shaft bending under excessive force
Thread wear causing mounting instability
Thermal expansion affecting accuracy
Material fatigue from cyclic loading
Contamination affecting surface contact

FMEA Triads

Trigger: Excessive measurement force or accidental impact
Failure: Permanent shaft bending or fracture
Mitigation: Implement force limits in CMM software, use protective covers, and train operators on proper probing techniques

Trigger: Thread wear from frequent mounting/dismounting
Failure: Loose connection causing measurement drift
Mitigation: Use torque-limiting tools, implement scheduled thread inspection, and consider quick-change systems with wear-resistant materials

Trigger: Thermal gradients in measurement environment
Failure: Dimensional changes affecting measurement accuracy
Mitigation: Use low thermal expansion materials (carbide, ceramic), implement temperature compensation, and maintain stable environment (±1°C)

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 1101: Straightness ≤0.002 mm, Circularity ≤0.001 mm, Position ≤0.005 mm

Test Method

Coordinate measuring machine verification per ISO 10360, roundness testing per ISO 12181, surface roughness per ISO 4287

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 shaft

Manufacturer profiles associated with Stylus shaft.

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Frequently Asked Questions

What is the primary function of a stylus shaft in tactile probing?

The stylus shaft transmits contact forces from the measurement tip to the probe's sensing system while maintaining precise alignment and minimal deflection to ensure accurate coordinate measurement data.

How do material choices affect stylus shaft performance?

Materials impact rigidity, weight, thermal stability, and wear resistance. Stainless steel offers good balance, tungsten carbide provides maximum stiffness, ceramics reduce weight, and titanium alloys offer strength with lighter weight for longer shafts.

What are critical tolerances for stylus shafts?

Straightness (≤2 μm/100 mm), diameter consistency (±5 μm), thread concentricity (≤10 μm TIR), and surface finish (Ra ≤0.2 μm) are critical for measurement accuracy and repeatability.

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 shaft