Mining & Heavy Equipment Components
Precision Sleeves Built for Extreme Industrial Conditions
SleeveMFG produces custom-machined sleeves, bushings, and spacers for machinery exposed to constant vibration, abrasive dust, and extreme loads. We manufacture directly from your engineering drawings or technical specifications.
±0.005 mm
Grinding tolerance capability
Ø3–500 mm
Sleeve diameter range
1500 mm
Maximum component length
Manufactured to your drawing
Designed for reliable integration into existing rotating assemblies without field modifications.
Engineered for harsh environments
Exact fits for equipment that cannot afford downtime
Mining equipment such as crushers, excavators, conveyors, and drilling rigs requires more than standard dimensions. Strict control over bore and outside diameter tolerances helps prevent premature failure caused by misalignment or vibration.
We machine sleeves for specific H6/H7 and h6/h7 fits, while controlling concentricity and runout for rotating assemblies. By manufacturing to your exact print, we help components integrate into existing machinery and reduce maintenance-cycle downtime.
Material and process expertise
Built around the demands of your application
We select materials and secondary processes according to load, wear, corrosion, friction, and the intended service environment.
Wear-resistant materials
Material selection- Alloy steels: 4140, 4340, and 42CrMo for high tensile strength and toughness.
- Case-hardened steels: A hard, wear-resistant surface combined with a ductile core.
- Stainless steels: 17-4PH, 410, and 420 for wet or chemically active environments.
- Tool steels: D2 and A2 where extreme abrasion resistance is the priority.
- Bronze alloys: For bushing applications requiring self-lubrication or anti-galling properties.
Materials can be sourced to international standards or specified mechanical properties to match the original equipment design intent.
Precision machining and grinding
Process controlCNC turning
Shoulders, flanges, grooves, and complex profiles.
OD/ID grinding
Tolerances down to ±0.005 mm and finishes to Ra 0.2 μm.
Geometry control
Cylindricity and roundness controlled within 0.005–0.01 mm.
Component range
Diameters from Ø3 mm to Ø500 mm and lengths up to 1500 mm.
Surface performance
Extend service life beyond the base material
Surface condition directly affects sleeve life in the field. We coordinate treatments that improve hardness, wear resistance, corrosion protection, and sliding performance.
Heat treatment
Quenching and tempering, induction hardening, and carburizing to increase hardness levels.
Hard coatings
Hard chrome plating and electroless nickel plating for wear and corrosion resistance.
Advanced coatings
PVD and DLC coatings for high-friction or extreme sliding-wear applications.
Surface finishing
Honing and polishing for reliable seal interfaces and reduced mating-component wear.
One manufacturing partner, two workflows
Support for OEM production and urgent MRO replacement
For OEMs
We provide consistent production quality for new equipment builds and maintain your specifications across batches, so production sleeves match prototypes validated by your engineering team.
Documentation includes material certificates and inspection reports to support your internal quality standards.
For MRO and repair teams
When machinery is down, waiting for an OEM lead time is not an option. We manufacture replacements from physical samples, old drawings, or reverse-engineered dimensions.
For discontinued parts or unavailable original manufacturers, we provide direct replacements machined to the required fit and finish.
Quality assurance
Verified before shipment
Every component is inspected against your drawings using calibrated measurement equipment, ensuring sleeves are ready for immediate installation.
CMM inspection
Complex geometries and profiles verified with a coordinate measuring machine.
Bore and micrometer gauges
Precise ID and OD verification for critical fits.
Surface roughness testing
Seal and bearing surfaces checked for finish integrity.
Hardness testing
Heat treatment effectiveness verified before release.
Request a quote
Send us your mining component requirements
SleeveMFG manufactures custom sleeves to your specific requirements. We accept PDF, STEP, DWG, and DXF files.
For a prompt quotation, include the material, quantity, tolerances, and any surface treatment requirements in your request.
RFQ email: info@sleevemfg.com
Facility address:
SleeveMFG — Precision Sleeves, Manufactured to Your Drawing.
Start your inquiry
Share your drawing, sample details, or component specifications with our team.