Made-to-Print Manufacturing · Dongguan, China
Custom Alloy Steel Sleeves: Precision Machined to Your Drawing
SleeveMFG provides custom manufacturing services for alloy steel sleeves, bushings, and spacers. We produce components based directly on customer engineering drawings and specifications, focusing on parts that require tight tolerances, specific material grades, and controlled geometric features for pumps, power transmission, and heavy machinery.
We do not supply off-the-shelf catalog parts. Our process is built for made-to-print manufacturing, ensuring that every sleeve matches your design requirements for fit, function, and material properties.
- Outside Diameter Range
- Ø3 – Ø500 mm
- Grinding Tolerance
- ±0.005 mm
- Surface Finish
- Ra 0.2 μm
- RFQ Response
- 24 – 48 h
Material Selection
Alloy Steel Material Selection
The performance of a sleeve is determined by the base material. We maintain a steady supply of industrial-grade alloy and carbon steels suited for high-load, high-wear, and high-impact applications. Our machine shop is optimized for the following grades:
Standard Carbon Steels
For general structural and spacer applications.
Chromium-Molybdenum Alloys
Standard for high-strength, fatigue-resistant shafts and sleeves.
Nickel-Chromium-Molybdenum Alloys
For high-toughness, deep-hardening applications.
Bearing & Tool Steels
For wear-resistant bushings and hardened contact surfaces.
If your engineering design requires a specific international standard (ASTM, AISI, DIN, JIS) or a custom chemical composition, we source raw materials from verified steel mills and provide material test reports (MTRs) with your shipment.
Precision Machining
Capabilities Held to Tight Tolerances
Machining alloy steel requires a balance of speed, feed, and tooling geometry to manage heat and maintain dimensional stability. Our facility utilizes CNC turning and grinding processes to hold tolerances that standard machine shops often struggle to achieve.
We specialize in parts that require multiple operations — from first cut to final fit.
| Process Parameter | SleeveMFG Capability |
|---|---|
| Outside Diameter | Ø3 mm – Ø500 mm |
| Inside Diameter | Ø1 mm – Ø450 mm |
| Length | 3 mm – 1500 mm |
| CNC Turning Tolerance | ±0.01 mm |
| Precision Grinding Tolerance | ±0.005 mm |
| Concentricity / Runout | Down to 0.01 mm |
| Surface Finish | Ra 0.2 μm – Ra 1.6 μm |
A Typical Multi-Operation Production Run
CNC Turning
Blanking, profiling, and boring to ±0.01 mm on CNC lathes.
Hardening
Heat treatment coordinated with specialized local partners to reach specified hardness.
Precision Grinding
Centerless or ID/OD grinding to ±0.005 mm, meeting critical fit requirements such as H7/h6 for bearing housings.
Heat Treatment & Surface Modification
Engineered to Survive the Operating Environment
Alloy steel components often require heat treatment to survive the operating environment. We coordinate with specialized local heat-treatment partners to ensure the mechanical properties of your sleeves meet design specifications. Common post-machining processes include:
Through Hardening
Quenching and tempering for uniform hardness throughout the cross-section.
Case Hardening
Carburizing or nitriding to create a hard, wear-resistant surface while maintaining a tough, ductile core.
Induction Hardening
Selective hardening for areas subject to high friction, such as bearing journals or seal faces.
Surface Protection
Black oxide, zinc plating, or electroless nickel plating to provide the required level of corrosion resistance for your specific application.
Quality Control
Inspection on Every Batch
SleeveMFG follows a rigorous inspection protocol for every batch. We treat dimensions, geometry, and material integrity as critical variables.
Our inspection department uses calibrated equipment, including CMMs, profile projectors, bore gauges, and surface roughness testers.
All production orders include inspection reports and, upon request, material certification documentation.
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✓
Dimensional Accuracy
All diameters, lengths, and wall thicknesses verified against the drawing.
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✓
Geometric Tolerances
Concentricity, roundness, and cylindricity checked for rotational balance.
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✓
Fitment
Bores checked against gauges to ensure proper clearance or interference fits.
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✓
Surface Integrity
Finish requirements confirmed to prevent premature seal or bearing failure.
Industries & Applications
Applications for Alloy Steel Sleeves
We manufacture components for companies operating in demanding industrial sectors. Alloy steel is selected for these applications due to its high strength-to-weight ratio and ability to be heat treated for specific hardness levels.
Pump & Fluid Handling
Seal sleeves, shaft sleeves, and wear rings that require resistance to mechanical stress and fluid pressure.
Power Transmission
Spacer sleeves, couplings, and bearing sleeves that support rotational loads.
Mining & Heavy Equipment
Hardened bushings and sleeves designed for high-impact and abrasive environments.
Automotive & Industrial Machinery
Precision-ground components where dimensional stability under load is critical.
Get Started
Request a Quote for Your Project
SleeveMFG is ready to review your technical drawings and provide a competitive quote for your alloy steel sleeves. Whether you are sourcing for a new OEM project or replacing an obsolete part for MRO, our team is equipped to handle your requirements.
To receive an accurate quote, please provide the following:
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1
Engineering Drawings: PDF, STEP, DWG, or DXF files.
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2
Material Specifications: Required grade or mechanical property requirements.
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3
Quantity: From one-off prototypes to medium-volume production runs.
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4
Special Requirements: Tolerances, heat treatment, or surface finish specifications.
Send your RFQ to info@sleevemfg.com. We typically respond within 24–48 hours.
Contact SleeveMFG
Reach our engineering team directly or use the inquiry module below.
- info@sleevemfg.com
- Facility
Online Inquiry
Submit your drawings and specifications through our inquiry module, and our team will get back to you with a quote.
SleeveMFG
Custom Sleeves. Made to Your Drawing.