Eccentric Bushing

Establishes and supports eccentric motion through a replaceable low-friction sliding bearing.

Eccentric Bushing (Eccentric Bushing)— Gyratory Crusher Wear part, position 06.

Installation and Function

Installation PositionInside the eccentric assembly, corresponding to location 06 in the FLS cutaway diagram marked on this site.
Main FunctionEstablishes and supports eccentric motion through a replaceable low-friction sliding bearing.
Replacement FrequencyMedium replacement frequency; replace for excessive clearance, scoring, melting damage, local hot spots or abnormal metal content in the oil.

Materials and Mechanical Properties

ItemDetails
Material OptionsLeaded tin bronze of the C93200/C93800 type, aluminium bronze or an OEM-specified centrifugally cast copper bearing alloy
Typical Properties and Acceptance CriteriaOperates at low speed, high contact pressure and oscillating motion with continuous oil lubrication. For example, the main composition ranges for C93200 are Sn 6.3–7.5%, Pb 6–8%, Zn 2–4% and Cu 81–85%. Confirm the actual grade and impurity limits against OEM requirements and the material standard. Acceptance checks cover composition, casting soundness, segregation, hardness, coaxiality, cylindricity, oil grooves, surface finish, interference fit and running clearance.
Principal Failure MechanismSliding or three-body abrasion, localized impact and cracking around fastener holes; contact fatigue, lubricant contamination, temperature rise, seizure and seal failure

Material and Design Considerations

  • Identify material hardness, particle size, abrasiveness, moisture, temperature, pH, impact and tramp material;
  • High hardness does not replace core toughness, fatigue strength, corrosion resistance or high-temperature performance;
  • For composite, hardfaced, ceramic and elastomer designs, assess substrate bonding, edge protection, fastening and maintainability;
  • For parts that mate with shafts, gears, seals, roll surfaces or housings, control fits, tolerances, surface finish and assembly clearances together;
  • Assess material upgrades using cumulative throughput, dimensional wear, failure modes, product quality and downtime costs.

Required Ordering / RFQ Information

  • Equipment manufacturer, machine model, serial number, part number and latest drawing revision;
  • Part dimensions, unit weight, key tolerances, assembly and fastening method;
  • Current material, chemical composition, heat treatment, hardness and mechanical property reports;
  • Processed material, maximum particle size, hardness/abrasiveness, moisture and tramp material records;
  • Speed, load, temperature, pressure, process medium chemistry and continuous operating time;
  • Failure photographs, wear measurements, crack/fracture locations and current service life;
Materials and values are for preliminary engineering selection. Final chemical composition, heat treatment, hardness and dimensional tolerances must follow the OEM drawings and technical agreement.
Related Equipment and Materials

Equipment, Materials and OEM Identification

Use these links for preliminary selection. Confirm the complete model, serial or drawing number, drawing revision, dimensions and actual operating conditions to establish fit.

Independent aftermarket information. OEM names and trademarks belong to their respective owners and do not imply authorization, affiliation or endorsement. Confirm the series, complete model, serial or drawing number, drawings and operating conditions before manufacture.

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