Bolt specifications

There are several specifications, such as M36, M42, M48, if not say how much nut, is the metric bolts and nuts on the opposite side of the sleeve, M36 in the nut on the other side of the hexagonal 55, M42 is 65, M48 is 75. If the bolt size is too large, and the torque span is large, it is necessary to use these two types of wrenches.

Bolt torque

Reminder: bolt specifications, the strength of the bolt level is the most common hydraulic torque wrench selection parameters, different bolts, different torque, the same bolt strength grade different torque, the same bolt strength level, different working conditions, the torque is different In the rolling mill equipment and chemical equipment on the bolt torque is not the same, the general design drawings will give the torque size, if not give, will give the corresponding scale number, such as heavy machinery and equipment is the national standard -JB / T5000.10- 2007, such as 8.8 M42 bolts torque of 2744Nm; M36 bolt torque of 1764Nm; M48 bolt torque of 3920Nm; above three bolts can choose a type of wrench.