Shaft Spacer Sleeve
We take a φ20×φ16×20 mm (OD×ID×length) spacer sleeve as an example. The outer diameter φ20 h7 is 20.000 to 19.985 mm. The inner diameter φ16 H8 is 16.000 to 16.027 mm. The length tolerance is ±0.1 mm. The concentricity of OD and ID is ≤0.05 mm. The two end faces are parallel within ≤0.05 mm.
Keep the Right Gap with Our Shaft Spacer Sleeve
Do you need to protect a hole wall from wear? Do you need to keep a precise axial gap between two parts? Our Shaft Spacer Sleeve does this job. It includes spacer sleeves and bushings. A spacer sleeve keeps the axial gap between bearings. A bushing takes radial friction. It protects the main body. We are a Shanghai factory. We have supplied fasteners for 20 years.
Check Our Tolerance Data and Load Capacity
We take a φ20×φ16×20 mm (OD×ID×length) spacer sleeve as an example. The outer diameter φ20 h7 is 20.000 to 19.985 mm. The inner diameter φ16 H8 is 16.000 to 16.027 mm. The length tolerance is ±0.1 mm. The concentricity of OD and ID is ≤0.05 mm. The two end faces are parallel within ≤0.05 mm. We take a bushing with 40Cr material, 3 mm wall thickness, and 30 mm length. The radial static load limit is ≥15 kN. When used as a spacer, take a φ16×φ20×10 mm part. The elastic deformation is ≤0.02 mm under a 10 kN axial load. We choose materials based on the use. 20Cr with carburizing and quenching gives surface hardness HRC 56-62 and core hardness HRC 25-35. It is wear resistant and tough. 40Cr with heat treatment and induction hardening gives surface hardness HRC 50-55. It has high overall strength. GCr15 with full hardening gives HRC 60-64. It is for high wear bearing bushings. Q235 is for normal loads.
|
Parameter |
Standard / Value |
|
OD Tolerance (φ20 h7) |
20.000 - 19.985 mm |
|
ID Tolerance (φ16 H8) |
16.000 - 16.027 mm |
|
Concentricity (OD to ID) |
≤ 0.05 mm |
|
Radial Load Limit (40Cr, 3mm wall) |
≥ 15 kN |
Why Our Equipment and Certification Matter
We have thread rollers, automatic lathes, CNC lathes, and cold heading machines. We also have a full automatic packing machine. We have salt spray testers, 2D projectors, hardness testers, and optical sorters. We check every batch. We accept third-party inspections. We can do a 100% full check before packing. We passed IATF 16949:2016 certification. Surface finish includes zinc plating, black oxide, or phosphating. Phosphating makes a phosphate coating. It holds oil well. This is good for sliding friction. For GCr15 material with full hardening, the sliding wear rate is ≤0.005 mm per 1000 hours with oil lubrication. This follows GB/T 12444. Spacers keep the bearing gap on motor shafts. Bushings are wear parts for excavator pin holes. They protect the main body. Guide bushings work with guide posts in stamping molds.
The entire product line is fully customizable.
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