Custom 304 Stainless Steel Slotted Expansion Sleeve | Precision CNC Machined Centering Bushing

Custom 304 stainless steel expansion sleeves for fixture centering and shaft clamping. In-house CNC machining from raw tube to finished part, tight tolerance, corrosion-resistant. Send your drawing for a quote.

Looking for reliable, high-precision centering and clamping components for your automation jigs and test equipment? Our custom slotted expansion sleeves are engineered to deliver stable, backlash-free shaft gripping. Every sleeve is fully machined in-house, starting directly from seamless 304 stainless steel tubing, all the way through turning, slotting, drilling and final quality inspection. Whether you need one-off prototypes, small trial batches or high-volume serial production, we tailor every part to match your drawing specifications.

Product Overview

This expansion sleeve (also known as an expanding centering bushing) is a critical elastic clamping component widely adopted in precision fixture systems. The elastic segmented structure contracts evenly under axial compression to wrap tightly around the shaft, achieving coaxial positioning without gaps. Compared with rigid clamping solutions, it distributes gripping force uniformly, avoids damage to mating shaft surfaces and allows for easy assembly and disassembly. The photos showcase our complete production workflow: raw seamless stainless tube → CNC internal & external turning → precision slotting and hole machining → deburring & finished component.

Core Specifications & Benefits

✅ Material: 304 Stainless Steel Offers excellent corrosion resistance, good ductility and stable elasticity.

Suitable for workshop, wet and general corrosive working environments. ✅

Precision CNC Machining In-house turning, slotting and drilling. Strict control on concentricity, roundness and wall thickness. All edges are deburred and radiused as required. ✅

Uniform Elastic Clamping Slotted segmented design ensures even shrinkage, high centering accuracy and consistent holding force. Zero-backlash positioning. ✅

 Flexible Customization We follow your CAD drawings for dimension adjustment, tolerance tuning and modification of slot/hole layout. Prototype sampling is supported. ✅

Full Quality Check Each batch undergoes dimensional verification. Inspection reports can be provided upon request.

Typical Applications

· Custom automation fixtures & workholding jigs

· Precision inspection and testing equipment

· Spindle centering and positioning mechanism

· Special-purpose machinery and transmission assemblies

· Lab & metering instrument tooling

Why Choose Us for Your Expansion Sleeve Machining?

Many suppliers only process semi-finished blanks. We handle the entire manufacturing process internally, starting from raw stainless steel tubing. This full-process control helps shorten lead times, stabilizes quality and keeps your unit cost competitive. Our engineering team is experienced with custom non-standard fixture parts. We can review your drawings, flag manufacturability risks and offer practical suggestions before production.

Ready to get a quotation?

Send your technical drawings, quantity requirements and tolerance specs to us. Our team will reply promptly with pricing and lead time.