Rock Bolt Coupling
Physical Properties
| Type Thread | Length | Outside Diameter | Weight |
| mm | mm | kg | |
| M16x2.0 pitch | 50 | 22 | 0.13 |
| M20x2.5 pitch | 60 | 28 | 0.25 |
| M24x3.0 pitch | 75 | 33 | 0.28 |
| U227x8.0 pitch | 120 | 35 | 0.53 |
| 20mm Thread Bar | 110 | 36.5 | 0.58 |
General Features
- Rock Bolt Couplings are used when:
- Head room is limited and prevents the installation of the desired bolt length.
- Longer bolts than those that are practical to manufacture are required.
- Multiple bolts can be coupled together to create longer tendons.
- DSI Rock Bolt Couplings are threaded from each end so that an equal length of bolt thread within the coupling can be reasonably assured.
- DSI Rock Bolt Couplings are manufactured from higher tensile material and will equal the tensile strength of the bolts if installed correctly.
- Corrosion protection may be provided by hot dip galvanizing (refer to Section G) or zinc plated to AS 1789-1984.
Notes
- DSI's Mining Products Division is Quality Assured to ISO 9001:2000, Registration No.QAC/R61/0315.