304 Stainless Steel Spacer Bushings / Hollow Cylindrical Sleeves Φ6 – Φ11 Series
Precision‑machined seamless tubular components — spacing, alignment, wear protection for automotive, machinery & industrial assemblies.
DISLAB Precision offers 304 stainless steel spacer bushings (hollow cylindrical sleeves, standoff tubes, plain bearing sleeves) manufactured from premium 304 stainless. Tight‑tolerance ID/OD, polished finish reduces friction and prevents galling. Inner diameters from Φ6mm to Φ11mm, outer diameters from 8mm to 20mm, lengths from 2.0mm up to 45.0mm — over 290+ combinations. These multi‑purpose bushings serve as spacers, shaft protectors, alignment aids and low‑load plain bearings for durable, corrosion‑resistant performance.
✔ Seamless construction | ✔ Deburred edges | ✔ OEM/ODM ready
✦ Core Product Advantages
📐 Precision Dimensional Consistency
Tight-tolerance machining ensures uniform ID/OD, ideal for alignment and spacing in high-volume assembly. Smooth inner bore minimizes friction for plain bearing usage.
🛡️ Corrosion-Resistant 304 SS
Premium 304 stainless steel resists rust and corrosion, suitable for humid environments, outdoor equipment or moisture-exposed machinery. Polished finish prevents buildup.
⚙️ Multi‑Functional Design
Acts as spacers, protective sleeves, alignment aids — reduces need for multiple custom parts, simplifies assembly and shaft protection.
📦 Comprehensive Size Range
ID Φ6–Φ11, OD 8–20mm, length 2–45mm — over 290 combinations reduce custom machining and shorten lead times.
Seamless Construction & Industrial Applications
The seamless tube design provides uniform strength and eliminates weak points, ensuring the bushing maintains shape under load. Deburred edges prevent snags or damage during installation. These bushings are widely used in automotive manufacturing (door hinges, suspension components, engine assemblies), construction machinery (loaders, excavators, wear sleeves), mechanical assembly & alignment, and as low-load plain bearings for light‑duty rotational or sliding components. The corrosion‑resistant polished bore reduces friction without lubrication in many scenarios, extending equipment life.
✅ Real case: a leading construction machinery manufacturer ordered 80,000 pcs of Φ8×12×15mm bushings for loader hinge assemblies. After 18 months, zero wear or corrosion issues reported, leading to follow‑up orders.
📏 Dimension Specification — Hollow Liner (mm)
| Inner Diameter (ID) | Φ6 | Φ7 | Φ8 | Φ9 | Φ10 | Φ11 |
|---|---|---|---|---|---|---|
| Matched OD (mm) | 8,15,17,25 | 9,18,28 | 10,20,30 | 12,32 | 13,35 | 14,16,20,22,40,45 |
| Standard OD options | 8,9,10,12,13,14,15,16,17,18,20 (up to 20mm depending on ID) | |||||
| Length (Width) mm | 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 7.5, 8.0, 9.0, 10.0, 11.0, 12.0, 12.5, 13.0, 14.0, 15.0, 16.0, 18.0, 20.0, 22.0, 25.0, 28.0, 30.0, 32.0, 35.0, 40.0, 45.0 | |||||
📌 Real Customer Case — 80,000 pcs Bulk Order
A leading construction machinery manufacturer in eastern China placed a bulk order of 80,000 pieces of Φ8×12×15mm 304 stainless steel spacer bushings for loader hinge assemblies. DISLAB Precision delivered strict dimensional checks, smooth finish to prevent galling. After 18 months field use, zero bushing wear or corrosion, even under heavy loads & moisture. Follow‑up order for additional sizes placed.
❓ Frequently Asked Questions
A: Cylindrical design maintains spacing over distance, acts as shaft protector — washers cannot.
A: Ideal for low/medium speed; for high-load high-speed, contact us for hardened options.
A: Yes, seamless construction allows easy cutting; deburr cut edge to maintain smooth finish.
A: 304 SS is generally non‑magnetic; slight magnetism may appear after machining, not affecting performance.
Direct Contact Channels
- One-stop service: design, customization, production, and global delivery
- OEM/ODM solutions for industrial and export-oriented buyers
© DISLAB Precision — High quality stainless steel bushings | Global shipping | Custom drawing support