Bushing: Load Capacity Up to 500 kN, Inner Diameter 20-100 mm

Component Specifications

Definition

A bushing is a precision-engineered cylindrical sleeve designed to serve as a bearing surface between the pin and link plates in track chain systems. It provides a sacrificial wear surface, absorbs radial loads, and maintains proper alignment while minimizing metal-to-metal contact. Bushings are critical for extending the service life of track chains by distributing stress and preventing premature failure of more expensive components.

Working Principle

The bushing operates on the principle of providing a low-friction interface between rotating or sliding surfaces. In track chains, it rotates around the stationary pin while the track links move, creating a bearing surface that converts sliding friction into more manageable rolling or controlled friction. This reduces heat generation, wear, and energy loss while maintaining structural integrity under heavy loads and harsh environmental conditions.

Materials

Typically made from case-hardened alloy steel (e.g., AISI 8620, 4140) with surface hardness of 55-62 HRC and core toughness of 25-35 HRC. Advanced versions may use through-hardened steels, boron steels, or composite materials with wear-resistant coatings like chrome plating or induction hardening.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	40-200 mm
Hardness	55-62 HRC surface
Load Capacity	Up to 500 kN
Inner Diameter	20-100 mm
Outer Diameter	30-150 mm
Surface Finish	Ra 0.8-1.6 μm
Operating Temperature	-40°C to 120°C

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 286-2, DIN 1494, ISO 5753, SAE J429

Parent Products

This component is used in the following industrial products

Track Chain

A continuous chain assembly that forms the structural backbone of a tracked vehicle's undercarriage, transferring power from the drive sprocket to the ground.

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Engineering Analysis

Risks & Mitigation

Premature wear due to inadequate lubrication
Seizure from contamination ingress
Fatigue cracking under cyclic loading
Improper installation causing misalignment

FMEA Triads

Trigger: Insufficient or contaminated lubrication
Failure: Accelerated wear, overheating, and eventual seizure
Mitigation: Implement regular lubrication schedules with proper filtration systems and use sealed bushing designs where possible

Trigger: Excessive side loading or misalignment
Failure: Uneven wear patterns, reduced service life, and potential catastrophic failure
Mitigation: Ensure proper installation alignment, use precision mounting tools, and implement regular alignment checks

Trigger: Material defects or improper heat treatment
Failure: Premature cracking, spalling, or deformation under load
Mitigation: Implement strict quality control measures, material certification, and non-destructive testing during manufacturing

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

IT7-IT8 for diameter tolerances, concentricity within 0.05 mm, straightness within 0.1 mm per 100 mm length

Test Method

Dimensional verification per ISO 286-2, hardness testing per ISO 6508, non-destructive testing (MPI/UT), wear testing per ASTM G99

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.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Bushing

Manufacturer profiles associated with Bushing.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a bushing in a track chain?

The primary function is to provide a sacrificial wear surface between the pin and link plates, reducing friction, distributing loads, and extending the overall service life of the track chain assembly.

How often should track chain bushings be inspected?

Bushings should be inspected every 250-500 operating hours or according to manufacturer recommendations. Regular inspection includes checking for wear patterns, cracks, and proper lubrication.

Can worn bushings be repaired or must they be replaced?

Bushings are typically replaced rather than repaired due to their role as sacrificial components. Attempting to repair worn bushings can compromise structural integrity and lead to catastrophic 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.

Bushing