INDUSTRY COMPONENT

Gear Teeth

Gear teeth are the projecting elements on gear wheels that transmit torque and motion through meshing engagement in mechanical systems.

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Component Specifications

Definition
Gear teeth are precisely engineered projections arranged around the circumference of gear wheels, designed to mesh with corresponding teeth on mating gears to transmit rotational motion and torque. In helical and bevel gears, teeth are cut at an angle to the gear axis (helical) or on conical surfaces (bevel), enabling smooth power transmission, reduced noise, and higher load capacity compared to spur gears. Their geometry follows specific involute or cycloidal profiles to ensure constant velocity ratio and proper contact patterns.
Working Principle
Gear teeth operate on the principle of mechanical engagement, where the meshing of tooth profiles converts input rotational motion into output motion with controlled speed, torque, and direction. In helical gears, angled teeth engage gradually, reducing shock and noise while distributing load across multiple teeth. In bevel gears, teeth on conical surfaces transmit motion between intersecting shafts, typically at 90-degree angles. The involute tooth profile ensures smooth rolling contact and compensates for minor misalignments.
Materials
Common materials include alloy steels (e.g., AISI 4140, 8620), carbon steels, stainless steels (e.g., 304, 316 for corrosion resistance), cast iron, bronze, and engineered plastics (e.g., nylon, acetal for lightweight applications). Heat treatments like carburizing, nitriding, or induction hardening are applied to enhance surface hardness (typically 55-65 HRC) and wear resistance while maintaining a tough core.
Technical Parameters
  • Module 1-10 mm
  • Hardness 55-65 HRC (surface)
  • Face Width 10-100 mm
  • Helix Angle 15°-30°
  • Accuracy Grade ISO 1328 Class 5-9
  • Pressure Angle 20° (common), 14.5° (legacy)
  • Surface Finish Ra 0.4-1.6 μm
Standards
ISO 1328, ISO 6336, DIN 3960, AGMA 2001

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Gear Teeth.

gear teeth helical gear teeth bevel gear teeth gear tooth design gear manufacturing power transmission components industrial gears gear specifications Gear Teeth in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Helical/Bevel Gears

Gear components within a main drive gearbox that transmit power and motion between non-parallel shafts.

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Swing Bearing

A large-diameter bearing that enables the upper structure of a crawler excavator to rotate relative to the undercarriage.

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Main Reduction Gear

The primary gear component within an elevation gear assembly responsible for achieving the main speed reduction and torque multiplication.

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Engineering Analysis

Risks & Mitigation
  • Tooth breakage due to overload or fatigue
  • Wear and pitting from inadequate lubrication
  • Noise and vibration from misalignment or improper meshing
  • Scoring from poor surface finish or contamination
FMEA Triads
Trigger: Excessive torque or shock loads
Failure: Tooth bending fatigue or fracture
Mitigation: Design with adequate safety factors, use high-toughness materials, implement overload protection devices
Trigger: Insufficient or contaminated lubrication
Failure: Abrasive wear, pitting, or scoring
Mitigation: Follow manufacturer lubrication schedules, use filters, select appropriate lubricant viscosity
Trigger: Misalignment during installation or operation
Failure: Uneven load distribution leading to premature wear
Mitigation: Precision alignment during assembly, use flexible couplings, regular maintenance checks

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Tooth profile tolerance per ISO 1328 Class 5-9, backlash control within 0.05-0.2 mm depending on application
Test Method
Coordinate measuring machines (CMM) for geometry, hardness testers (Rockwell), surface roughness testers, noise and vibration analysis, load testing under simulated conditions

Buyer Feedback

★★★★☆ 4.7 / 5.0 (10 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Gear Teeth meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Gear Teeth arrived with full certification."

"Great transparency on the Gear Teeth components. Essential for our Machinery and Equipment Manufacturing supply chain."

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Frequently Asked Questions

What is the difference between helical and bevel gear teeth?

Helical gear teeth are cut at an angle to the gear axis, providing smooth, quiet operation and higher load capacity for parallel shafts. Bevel gear teeth are mounted on conical surfaces and transmit motion between intersecting shafts, commonly at 90 degrees, used in applications like differential drives.

Why are gear teeth typically made with an involute profile?

The involute profile ensures constant velocity ratio during meshing, reduces friction and wear, allows for variable center distances without affecting motion transmission, and is easier to manufacture precisely compared to other profiles like cycloidal.

How does material selection affect gear tooth performance?

Material choice impacts durability, load capacity, and application suitability. Alloy steels offer high strength and wear resistance for heavy loads, stainless steels provide corrosion resistance, bronze reduces friction in worm gears, and plastics are used for lightweight, low-noise applications.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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