Pinion Gear Teeth: Face Width 10-100 mm, Module 1.5-10 mm

Component Specifications

Definition

Pinion gear teeth are precision-engineered projections on the circumference of a pinion gear, designed to engage with the teeth of a mating gear (typically a larger gear or rack) to transfer rotational motion and torque. As part of the input shaft and pinion assembly, these teeth convert input rotational energy into controlled mechanical output, with tooth geometry (including pressure angle, module/diametral pitch, and profile) optimized for specific load, speed, and efficiency requirements in industrial machinery.

Working Principle

Pinion gear teeth operate on the principle of conjugate action, where the precisely shaped tooth profiles of the pinion and mating gear maintain continuous contact during rotation. This ensures smooth transmission of motion and torque through rolling and sliding contact, minimizing backlash and vibration. The teeth convert rotational input from the shaft into mechanical force, with the gear ratio determined by the number of teeth on the pinion relative to the mating gear.

Materials

Typically alloy steels (e.g., AISI 4140, 4340, or case-hardened steels like 20MnCr5), stainless steels (e.g., 304, 316 for corrosion resistance), or specialty materials like bronze or plastics (e.g., nylon, acetal) for specific applications. Surface treatments include carburizing, nitriding, or induction hardening to enhance wear resistance and fatigue strength.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Module	1.5-10 mm
Backlash	0.05-0.15 mm
Hardness	58-62 HRC (surface)
Face Width	10-100 mm
Accuracy Grade	ISO 1328 Class 5-8
Pressure Angle	20° (standard), 14.5° or 25°
Number Of Teeth	12-40

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, JIS B 1702

Parent Products

This component is used in the following industrial products

Input Shaft & Pinion

A combined component consisting of an input shaft integrated with a pinion gear, serving as the primary torque input and initial speed reduction stage in a main drive gearbox.

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Engineering Analysis

Risks & Mitigation

Tooth breakage from overload
Premature wear due to misalignment
Pitting from insufficient lubrication
Noise and vibration from improper meshing

FMEA Triads

Trigger: Excessive torque or shock loads
Failure: Tooth bending fatigue or fracture
Mitigation: Implement torque limiters, use higher-strength materials, and ensure proper gear sizing for application loads.

Trigger: Misalignment during installation
Failure: Uneven wear and reduced service life
Mitigation: Use precision alignment tools, follow installation guidelines, and conduct regular alignment checks.

Trigger: Inadequate or contaminated lubrication
Failure: Surface pitting and accelerated wear
Mitigation: Follow manufacturer lubrication schedules, use recommended lubricants, and maintain clean lubrication systems.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Tooth profile tolerance per ISO 1328 Class 6-8, backlash within 0.05-0.15 mm depending on application

Test Method

Coordinate measuring machines (CMM) for geometry, hardness testing (Rockwell C), and non-destructive testing (e.g., magnetic particle inspection) for defects

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 Gear Teeth

Manufacturer profiles associated with Pinion Gear Teeth.

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Frequently Asked Questions

What is the primary function of pinion gear teeth?

The primary function is to transmit torque and rotational motion by meshing with a mating gear, converting input energy into controlled mechanical output with minimal loss.

How do I select the right material for pinion gear teeth?

Material selection depends on application requirements: alloy steels for high-load scenarios, stainless steels for corrosive environments, and plastics for low-noise or lightweight applications. Consider factors like load capacity, speed, and environmental conditions.

What are common failure modes for pinion gear teeth?

Common failures include pitting, wear, bending fatigue, and tooth breakage due to overload, misalignment, improper lubrication, or material defects.

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 Gear Teeth