INDUSTRY COMPONENT

Pinion Gear

A pinion gear is a small cylindrical gear that meshes with a larger gear or rack to transmit rotational motion and torque in mechanical systems.

Component Specifications

Definition
A pinion gear is a precision-engineered mechanical component designed to engage with a larger gear (typically called a gear or ring gear) or a linear rack to convert rotational motion into linear motion or to transfer torque between shafts. As the driving element in many gear systems, it operates at higher rotational speeds than the mating gear, providing mechanical advantage through gear ratio optimization. Pinion gears are critical in applications requiring speed reduction, torque multiplication, or directional change in power transmission systems.
Working Principle
The pinion gear operates on the fundamental principle of gear meshing, where its teeth engage with the teeth of a mating gear or rack. As the pinion rotates, it transfers rotational motion and torque through direct tooth contact, following the laws of kinematics and dynamics. The gear ratio (ratio of teeth between mating gears) determines speed and torque conversion. In rack-and-pinion systems, the pinion's rotation converts to linear motion of the rack. Proper meshing requires precise tooth geometry, alignment, and lubrication to minimize friction and wear while maximizing power transmission efficiency.
Materials
Typically manufactured from alloy steels (AISI 4140, 4340), carbon steels (1045, 1144), stainless steels (303, 304), or case-hardened steels. High-performance applications may use bronze, brass, or engineered polymers. Surface treatments include carburizing, nitriding, induction hardening, or coating with wear-resistant materials.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Module1-10 mm
Backlash0.05-0.20 mm
HardnessHRC 45-60 (surface)
Face Width10-100 mm
Quality GradeISO 1328 Class 5-9
Pitch Diameter10-400 mm
Pressure Angle20° or 14.5°
Number Of Teeth6-40 teeth

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

Engineering Analysis

Risks & Mitigation
  • Tooth breakage due to overload
  • Premature wear from improper lubrication
  • Misalignment causing uneven load distribution
  • Noise and vibration from poor meshing
  • Corrosion in harsh environments
FMEA Triads
Trigger: Insufficient lubrication or contaminated lubricant
Failure: Accelerated wear, scoring, and overheating
Mitigation: Implement scheduled lubrication maintenance, use filtration systems, and monitor oil quality regularly
Trigger: Misalignment during installation or operation
Failure: Uneven tooth loading, premature fatigue, and noise generation
Mitigation: Use precision alignment tools during installation, implement regular alignment checks, and use flexible couplings where appropriate
Trigger: Overload beyond design capacity
Failure: Tooth bending fatigue or sudden fracture
Mitigation: Install torque limiters, conduct regular load monitoring, and ensure proper gear selection for application requirements

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Tooth profile tolerance per ISO 1328 Class 7, runout tolerance within 0.02 mm, backlash tolerance ±0.05 mm
Test Method
Coordinate measuring machine (CMM) inspection, gear rolling test for noise evaluation, hardness testing per ASTM E18, surface roughness measurement 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.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Pinion Gear

6 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Fujian Guanwei Auto Parts Co., Ltd.
Quanzhou, Fujian, CN
Also makes: Differential Case
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Crown and Pinion Gear”
View source page ↗ gw-autoparts.com · recorded 2026-09-17
Fujian Jinquan Group
Fuzhou, Fujian, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Pinion Gear Box.jpg”
View source page ↗ fzjq.cn · recorded 2026-09-04
Henan Xintengfei Cast Steel Co., Ltd.
Henan, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Ball Mill Pinion Gear”
View source page ↗ tenfaye.com · recorded 2026-09-05
Jinhua Machinery
Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Ring & Pinion Gears”
View source page ↗ jinhuamach.com · recorded 2026-09-18
Shanghai Michigan Machinery Co., Ltd.
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Helical Rack And Pinion Gear ...”
View source page ↗ michiganmech.com · recorded 2026-08-31
Shanghai Yingyong Machinery Co., Ltd.
Shanghai, CN
Also makes: Impact Crusher, Cone Crusher, Jaw Crusher and 3 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “pinion gear”
View source page ↗ shyychina.com · recorded 2026-09-05

Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.

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Frequently Asked Questions

What is the difference between a pinion gear and a regular gear?

A pinion gear is specifically the smaller gear in a gear pair, typically the driving element, while 'gear' can refer to any toothed wheel. Pinions usually have fewer teeth and rotate faster than their mating gears.

How do I select the right pinion gear for my application?

Consider torque requirements, speed ratios, operating environment, material compatibility, and mounting constraints. Key parameters include module, pressure angle, number of teeth, and material hardness based on load conditions.

What maintenance do pinion gears require?

Regular lubrication with appropriate gear oil, periodic inspection for wear patterns (pitting, scoring), alignment checks, and monitoring of backlash and vibration levels to prevent premature failure.

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.

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