BOLTTE 45 Steel Diaphragm Couplings - DJM, JM, JMJ, SJM and ZJM Types
BOLTTE diaphragm shaft couplings use black-oxide 45 steel hubs and metallic diaphragm elements for precision power-transmission connections. The listed selection covers DJM, HJDBN, ZJM, JM, SJM and JMJ configurations.
Model range
- DJM00 through DJM12, including exact outer diameter, length where supplied, and bore range.
- HJDBN56-D94 and HJDBN56-D104 extended-length configurations.
- ZJM01 through ZJM07 locking configurations in the listed lengths and bore ranges.
- JM01 through JM14 plus custom SJM and JMJ double-diaphragm configurations.
DJM, JM and ZJM: choose a fully specified configuration
This listing combines several diaphragm-coupling families, including custom configurations. Select the exact series before comparing outside diameter, available length and bore range.
| Selection detail | What to check |
|---|---|
| DJM00 / OD 57 / L 44.9 mm | A model with explicit length and an 8–20 mm bore range in its label. |
| Models without a listed length | Request the full drawing before confirming installation spacing. |
| ZJM and custom SJM/JMJ options | Confirm locking arrangement or custom dimensions; do not treat a family label as a complete machining instruction. |
Can I choose by shaft bore alone?
No. Check shaft spacing, hub engagement, torque, speed and permitted misalignment, and state both finished bores and keyway requirements.
Related selection references
Compare the drawings and intended function; these references are not a statement of direct interchangeability.
Ordering notes
- Select the exact model, outer diameter, overall length when listed, and bore range shown in the option name.
- State the required finished bore for each hub in the order notes. Confirm whether the two bores are equal or different.
- For keyed bores, state the keyway width, depth and applicable shaft standard. For ZJM configurations, confirm the shaft fit and locking arrangement.
- Confirm torque, speed, axial and angular misalignment, shaft spacing, operating temperature and service environment before ordering.
All dimensions in the model names are in millimetres. Verify the selected coupling and interface dimensions against the actual equipment before installation.
Product Details and Technical Reference
