Custom Machined Sleeves for Industrial Machinery
SleeveMFG provides precision-machined sleeve components for industrial machinery and rotating equipment. We focus on made-to-print manufacturing, producing parts directly from customer drawings or physical samples.
From prototype development to high-volume production, we support OEMs, MRO providers, and industrial distributors with components that meet specific dimensional and geometric requirements.
Precision Engineering Standards
Sleeves in industrial machinery often operate under demanding conditions, requiring strict control over bore diameter, concentricity, and surface finish. Standard catalog parts frequently fail to meet the specific fitment needs of custom gearboxes, pumps, and heavy-duty motors.
CNC Turning Tolerance
±0.01 mm
Precision Grinding Tolerance
±0.005 mm
Concentricity / Runout
Down to 0.01 mm
Surface Finish
Down to Ra 0.2 μm
Achieving these specifications requires more than basic turning; it demands controlled processes for thin-wall components to prevent distortion and ensure consistent fits (H6, H7, h6, h7, etc.).
Manufacturing Capabilities
Our facility in Dongguan is equipped for the full lifecycle of sleeve manufacturing, from initial CNC turning to final grinding and inspection.
| Process | Capability |
|---|---|
| CNC Turning | Ø3 mm – Ø500 mm |
| Grinding (OD/ID/Centerless) | Precision fits for bearings and seals |
| Milling / Drilling | Keyways, cross holes, oil grooves |
| Threading | Metric, NPT, BSP, UNC, UNF |
| Part Length | 3 mm – 1500 mm |
Ø3–500 mm
Turning Range
We operate multiple CNC turning centers, allowing us to manage parts ranging from simple spacer sleeves to complex geometry with shoulders, flanges, and internal profiles.
Types of Components We Machine
We specialize in rotating components used across various industrial sectors. Our production is strictly custom—we do not carry standard inventory.
Shaft & Wear Sleeves
Hardened and ground surfaces for mechanical seal and bearing contact areas.
Bearing Sleeves
High-precision bores for interference or transition fits.
Spacer Sleeves
Precision-ground lengths for controlling axial stack-up in gearboxes and pump assemblies.
Pump & Seal Sleeves
Materials selected for corrosion and wear resistance in fluid handling.
Guide & Bushing Sleeves
For automation and linear motion applications.
Flanged & Stepped Sleeves
Complex profiles manufactured to specific assembly requirements.
Material Selection
We machine a wide range of industrial metals to match the mechanical, thermal, and chemical requirements of your application. We can source materials per your specified grade and provide material certification upon request.
Stainless Steel
304, 316, 316L, 17-4PH, 15-5PH (for corrosion resistance).
Carbon & Alloy Steel
1018, 1045, 4140, 42CrMo (for high-strength applications).
Tool & Bearing Steel
D2, 52100, GCr15 (for wear resistance).
Copper Alloys
Brass, Bronze, Aluminum Bronze.
Nickel Alloys
Inconel, Monel, Hastelloy (for extreme environments).
Secondary Operations & Surface Treatments
A sleeve's performance is often dictated by its surface properties. We coordinate the full supply chain to deliver finished parts ready for immediate assembly.
Heat Treatment
Quenching, tempering, carburizing, nitriding, and induction hardening.
Surface Coating
Hard chrome plating, electroless nickel plating, zinc plating, black oxide, and phosphating.
Advanced Finishing
PVD/DLC coating for extreme wear environments, precision honing, and electropolishing.
Why Industrial OEMs Choose SleeveMFG
We operate as an extension of your production line. Unlike general-purpose machine shops, our infrastructure is optimized for sleeve-type components.
Made-to-Print
We work from your PDF, STEP, DWG, or physical samples. We do not sell catalog parts.
Flexible Volume
We support the transition from prototype engineering samples to low-volume batches and mass production.
Supply Chain Consolidation
We manage the entire process—machining, heat treatment, surface finishing, and inspection—simplifying your procurement process.
Inspection Rigor
Every batch is verified using CMM, profile projectors, and high-precision gauges to ensure your parts meet drawing specifications before they leave our facility.
Request a Custom Sleeve Quote
To receive a quote for your industrial machinery components, please provide your engineering drawings or 3D models. Include the material specification, required tolerances, and estimated order quantity.
Email: info@sleevemfg.com
Phone:
Address:
Send your technical files to our engineering team today for a prompt response.