Pinion: Pitch Diameter 20-500 mm, Face Width 10-100 mm

Component Specifications

Definition

A pinion is a precision-engineered gear component designed to engage with a mating gear (typically larger) or a linear rack in rack-and-pinion systems. It converts rotational motion into linear motion or transmits torque between parallel or intersecting shafts. Pinions are characterized by their smaller diameter compared to mating gears, higher rotational speed, and specific tooth geometry optimized for load distribution and minimal backlash.

Working Principle

The pinion operates on the principle of gear meshing, where its teeth engage with the teeth of a mating gear or rack. As the pinion rotates, it drives the mating component, transferring motion and force. In rack-and-pinion systems, the rotational motion of the pinion is converted into linear motion of the rack, commonly used in steering mechanisms and linear actuators.

Materials

Common materials include alloy steels (e.g., AISI 4140, 4340), stainless steels (e.g., 304, 316), case-hardened steels, brass, and engineered plastics (e.g., nylon, acetal). Material selection depends on load, speed, corrosion resistance, and environmental conditions.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Module	1-10 mm
Backlash	0.05-0.2 mm
Hardness	HRC 45-60 (for steel)
Face Width	10-100 mm
Pitch Diameter	20-500 mm
Pressure Angle	20° or 14.5°
Number Of Teeth	10-50

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 1328, DIN 3960, AGMA 2000

Parent Products

This component is used in the following industrial products

Rack and Pinion

A mechanical linear actuator that converts rotational motion into linear motion.

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Engineering Analysis

Risks & Mitigation

Tooth wear or breakage due to overload
Misalignment causing uneven wear
Insufficient lubrication leading to overheating
Backlash increase affecting precision

FMEA Triads

Trigger: Excessive load or shock loading
Failure: Tooth fracture or bending
Mitigation: Design with adequate safety factor, use impact-resistant materials, implement load monitoring

Trigger: Poor lubrication or contamination
Failure: Abrasive wear or pitting
Mitigation: Use proper lubricants, install seals, regular maintenance schedules

Trigger: Misalignment during installation
Failure: Uneven tooth contact and premature wear
Mitigation: Precision alignment tools, training for installers, use of flexible couplings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 1328 Class 5-7 for precision applications

Test Method

Gear measurement via coordinate measuring machines (CMM), backlash testing, hardness testing per ASTM E18

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

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Manufacturers of Pinion

Manufacturer profiles associated with Pinion.

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Frequently Asked Questions

What is the difference between a pinion and a gear?

A pinion is a type of gear, specifically the smaller gear in a pair. The term 'pinion' emphasizes its role as the driving or smaller component, often in rack-and-pinion systems or gear trains.

How do I select the right pinion for my application?

Consider factors like load capacity, speed, material compatibility, environmental conditions, and mating component specifications. Consult ISO or AGMA standards for gear design guidelines.

What maintenance does a pinion require?

Regular lubrication, inspection for wear or damage, alignment checks, and monitoring of backlash to ensure optimal performance and longevity.

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.

Pinion