Hammer Spacer Ring

Maintains axial hammer spacing, swing clearance and coverage across the crushing width.

Hammer Spacer Ring

Hammer Spacer Ring (Hammer Spacer Ring)— Hammer Crusher Wear part, position 04.

Installation and Function

Installation PositionBetween hammers and rotor discs or adjoining hammers, item 04 in the HDS location and internal exploded diagrams.
Main FunctionMaintains axial hammer spacing, swing clearance and coverage across the crushing width.
Replacement FrequencyMedium; replace as a set for end-face wear, bore enlargement, cracks or excessive thickness variation within the set.

Materials and Mechanical Properties

ItemDetails
Material OptionsQuenched and tempered alloy steel, wear-resistant steel or OEM-specified spacer/wear ring material
Typical Properties and Acceptance CriteriaSpacer rings maintain axial hammer arrangement while resisting fretting, impact and trapped particles. Control thickness variation within the set, bore, end-face parallelism, surface hardness, cracks and safe clearance to hammer shafts and rotor discs. Arbitrary thickness changes disrupt full-width hammer coverage and rotor mass distribution.
Principal Failure MechanismImpact, cutting and abrasion

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.

Material Options for This Part

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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Drawing confirmation, material and process control, production tracking, inspection and acceptance coordination.

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