PM Multi-Jackbolt Pretensioners (MJP)
with Mammoth™ Jackbolts
Functional description
Mechanical Multi-Jackbolt Pretensioners (MJP) are the perfect solution for purely axial pretensioning.
MJP are designed according to ISO 898-2 and are used for general bolting applications in all areas of industry.
Due to the captive mounted Mammoth™ Jackbolts they are best suited for highly dynamic applications such as turbine runners.
The hexalobular head (Torx®) of the Jackbolts is extremely wear-resistant and safe to handle.
- International PCT Patent Application WO2018/065898
- United States Patent No.: US 11,092,186 B2
PM Standard Series
- PM08 » Tech. Details
- steel property class 8 according to ISO 898-2
- operational temperature from -10 to +250 °C
- for screw bolts M16 … M160
- for preload forces FV nom. 70 … 6230 kN
- PM10 » Tech. Details
- steel property class 10 according to ISO 898-2
- operational temperature from -50 to +250 °C
- for screw bolts M16 … M160
- for preload forces FV nom. 95 … 7610 kN
- PM12 » Tech. Details
- steel property class 12 according to ISO 898-2
- operational temperature from -50 to +250 °C
- for screw bolts M16 … M160
- for preload forces FV nom. 110 … 8300 kN » strongest standard series worldwide!
Special solutions
Larger diameters (> M160), special thread geometries, special materials (e.g. corrosion-resistant, amagnetic, etc.), extended temperature ranges or other application-specific designs » see Special solutions
Applications
General mechanical engineering, shipbuilding, heavy mechanical engineering, power plants, chemical industry. Used on couplings, slewing bearings, foundations, presses, bolted split joints and many more » see Applications
