BOLTTE 45 Steel 8-Bolt Single & Double Disc Diaphragm Couplings
BOLTTE 45 steel 8-bolt diaphragm couplings connect motor and driven shafts in servo, ball-screw, pump and machine transmission assemblies. Single- and double-disc configurations are available with clamp, set-screw, stepped and locking-assembly hub styles.
Configuration guide
- Single-disc series: HJNB, HJSWT, HJSB, HJSTB, HJSZT and HJSYT.
- Double-disc series: HJLWT, HJMB, HJLB, HJLTB and HJLZT.
- Outer diameter, overall length and available bore range are shown in the configuration selector.
- Configurations marked Bore A and Bore B allow different finished bore ranges on the two hubs.
8-bolt disc couplings: do not merge Bore A and Bore B
This range includes single- and double-disc models with different hub styles. Some labels give separate bore ranges for the two ends; each range must be respected independently.
| Selection detail | What to check |
|---|---|
| HJNB / OD 65 x L 55.5 mm | The example lists Bore A 12–30 mm and Bore B 12–38 mm. |
| Hub type | Check clamp, set-screw, stepped or locking-assembly construction against the shaft interface. |
| Final specification | State disc count, full series, length and the finished bore required at each end. |
Does an 8-bolt pattern establish a torque rating?
No. Bolt count is a construction detail, not a substitute for the model's verified torque, speed and misalignment limits.
Related selection references
Compare the drawings and intended function; these references are not a statement of direct interchangeability.
Ordering and installation
- Select the required disc count, hub style, series, outer diameter, length and bore range.
- State the finished bore dimensions for both shafts in the order requirements.
- Confirm shaft tolerances, keyway or clamping requirements, installation clearance and fastener access before ordering.
- Verify torque, speed and permitted axial, angular and parallel misalignment for the application before use.
