Out and in again - stud bolt assembly tool -BGM PRO- Assembly and disassembly

How to install stud bolts correctly

Brake drums, cylinders, engine housings -

stud bolts

are often used everywhere. stud bolts are often used. The lock nut method is often used for installation. We have even seen pliers in use... but that doesn't have to be the case:

Gentle and easy installation

Replacing these stud bolts is quite simple with a securely gripping tool.


Our tool for stud bolts is specially designed for the requirements of derailleur pulleys. All sizes can easily cope with a short piece of thread and can also be used in tight installation conditions. Precisely because the assembly tool manages with a very short piece of thread, care should be taken to ensure that the minimum screw-in depth is achieved.

Special tools for Vespa, Lambretta and co.

Special cases are, for example, the stud bolts on the engine housing or the cylinder outlet. Here the space is tight and the stud bolts are very short. A conventional tool with a roller clamp would inevitably damage the thread here or is not practical to use due to the limited space available.

Our BGM tool does not stress the thread of the stud bolt. The actual clamping takes place via the integrated ball, which engages with the face of the stud.

Thanks to their small size, these little helpers are also easy to stow in a luggage box for every tour.

The tools for fitting the stud bolts are available as a set or individually in M6, M7 and M8.