INDUSTRY COMPONENT

Teeth

Gear teeth are the projecting elements on gears that mesh with other gears to transmit torque and motion in mechanical systems.

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Component Specifications

Definition
Gear teeth are precisely engineered projections on the periphery of gears that engage with corresponding teeth on mating gears to transfer rotational motion and power. They convert input torque and speed into desired output characteristics through controlled meshing, with geometry defined by parameters like module, pressure angle, and tooth profile to ensure smooth, efficient power transmission with minimal backlash and wear.
Working Principle
Gear teeth operate on the principle of conjugate action, where the tooth profiles are designed to maintain a constant velocity ratio during meshing. As teeth engage, they roll and slide against each other, transmitting force along the line of action. The involute tooth profile ensures smooth engagement and disengagement, while proper tooth geometry minimizes friction, vibration, and power loss.
Materials
Common materials include alloy steels (AISI 4140, 8620), carbon steels, stainless steels, cast iron, brass, bronze, and polymers (nylon, acetal). Surface treatments: carburizing, nitriding, induction hardening, or coatings (TiN, DLC) for wear resistance.
Technical Parameters
  • Module 1-10 mm
  • Backlash 0.05-0.2 mm
  • Face Width 10-100 mm
  • Tooth Profile Involute, cycloidal
  • Accuracy Grade AGMA 9-12, ISO 1328 Class 5-8
  • Pressure Angle 20° (common), 14.5° or 25°
  • Number of Teeth 12-200
  • Surface Hardness HRC 45-60
Standards
ISO 1328, DIN 3960, AGMA 2000, JIS B 1702

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Teeth.

gear teeth sprocket teeth involute profile tooth module pressure angle gear meshing power transmission tooth wear gear standards Teeth Teeth in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Sprockets/Gears

Mechanical components that transmit motion and power through meshing teeth or engagement with chains.

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Bucket (Standard Digging)

The primary digging and material handling attachment for mining excavators

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Mining Bucket

The primary digging and material handling attachment of a hydraulic mining shovel.

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Engineering Analysis

Risks & Mitigation
  • Tooth breakage from overload
  • Pitting and spalling from surface fatigue
  • Scuffing due to poor lubrication
  • Excessive wear from contamination
  • Noise and vibration from misalignment
FMEA Triads
Trigger: Insufficient hardness or material defects
Failure: Tooth bending fatigue or breakage
Mitigation: Use properly heat-treated materials, conduct non-destructive testing, and design with adequate safety factors.
Trigger: Inadequate lubrication or contamination
Failure: Scuffing, pitting, or accelerated wear
Mitigation: Implement proper filtration, use recommended lubricants, and maintain correct oil viscosity and cleanliness.
Trigger: Misalignment or improper mounting
Failure: Uneven load distribution leading to premature failure
Mitigation: Ensure precise alignment during installation, use alignment tools, and check mounting surfaces regularly.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Tooth profile tolerance per ISO 1328 Class 7, backlash tolerance ±0.1 mm, tooth thickness tolerance IT7-IT9
Test Method
Coordinate measuring machines (CMM) for geometry, hardness testers (Rockwell), surface roughness testers, and gear analyzers for noise/vibration.

Buyer Feedback

★★★★☆ 4.8 / 5.0 (22 reviews)

"The technical documentation for this Teeth is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Teeth so far."

"Testing the Teeth now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What is the most common pressure angle for gear teeth?

20° is the most common pressure angle for modern gear teeth, offering a balance of strength, smooth operation, and reduced undercutting compared to older 14.5° designs.

How does tooth profile affect gear performance?

The involute tooth profile ensures constant velocity ratio, smooth engagement, and tolerance to center distance variations, while cycloidal profiles offer higher strength but are less common due to manufacturing complexity.

What causes gear tooth failure?

Common failures include pitting from surface fatigue, bending fatigue at the tooth root, scuffing from inadequate lubrication, and wear from abrasive particles or misalignment.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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