Drawing and Engineering Review
We review mating surfaces and interface dimensions and assess material, heat treatment and manufacturing feasibility.
Main Shaft Protective Sleeve
Protects the mainshaft body, threads and assembly faces, providing a replaceable interface after wear or removal damage.
Main Shaft Protective Sleeve (Mainshaft Sleeve)— Gyratory Crusher Wear part, position 01.
Location and Function
| Material Options | Quenched and tempered alloy steel such as 42CrMo/SAE 4140 or 34CrNiMo6, or OEM-specified forged or cast steel |
| Typical Properties and Acceptance Criteria | This is a replaceable protective mainshaft sleeve, distinct from a copper alloy sliding bushing. Key requirements are core strength and toughness, resistance to seizure at threads and mounting faces, coaxiality, cylindricity, wall thickness and NDT. Typical quenched and tempered hardness may fall around 260–340 HB, but the specific drawing governs. Before changing strength or surface hardening, assess removal and installation, mating threads and mainshaft stress concentrations. |
| Principal Failure Mechanism | Sliding or three-body abrasion, localized impact and cracking around fastener holes; contact fatigue, lubricant contamination, temperature rise, seizure and seal failure |
Information Required for RFQ
- Equipment manufacturer, machine model, serial number, model details 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 Pages
Equipment, Materials and OEM Installations
Use these links for engineering pre-selection. Final fit must be checked against the full model, serial number, drawing revision, dimensions and actual duty.
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Independent aftermarket information. OEM names and trademarks belong to their owners and do not imply authorization, affiliation or endorsement. Confirm the series, full model, serial number, drawings and duty before manufacture.