Turn of the Bolt Methods Implementation
Turn of the Bolt Methods Implementation
(OP)
Hello,
I have an application that required a preload of 50% of the proof load on a M24 x 70 to 120 long. The bolt goes thru a clearance hole and threaded on to a tapped hole. The space restriction does not allow the use of a torque wrench. I planned to use the "turn of the nut/bolt" method. The connection is pretty rigid and I calculated I need a rotation of 15-30 degrees. The problem I have is implementation. I can see this method working for "half turn" or "full turn" but 15-30 degrees seems rather hard to measure.
Do you have any recommendations or past experiences that you can share with me? Any help would be great! Thank you.
Regards,
Allan LeeĀ
I have an application that required a preload of 50% of the proof load on a M24 x 70 to 120 long. The bolt goes thru a clearance hole and threaded on to a tapped hole. The space restriction does not allow the use of a torque wrench. I planned to use the "turn of the nut/bolt" method. The connection is pretty rigid and I calculated I need a rotation of 15-30 degrees. The problem I have is implementation. I can see this method working for "half turn" or "full turn" but 15-30 degrees seems rather hard to measure.
Do you have any recommendations or past experiences that you can share with me? Any help would be great! Thank you.
Regards,
Allan LeeĀ





RE: Turn of the Bolt Methods Implementation
RE: Turn of the Bolt Methods Implementation
In actual practice, that is as close as you are likely to get. You will need to set some parameters to determine exactly what "snug tight" means before you start. Some guys are tougher than others and, therefore, snug takes on a new meaning. If your work is super critical, set up a Skidmore and practice before you do the real thing.
Rod
RE: Turn of the Bolt Methods Implementation
that wrench could be used as an extension for a
torque wrench.
- The wrench goes on the nut/bolt you want
to tighten;
- the torque wrench goes on the other
end of the wrench;
- the mechanical advantage is calculated and
applied to the torque requirement;
- the resulting torque is applied.
RE: Turn of the Bolt Methods Implementation
Using the screw head is a good idea but I have a socket head cap screw. The flat is inside the socket.
Do you know of any adapter/extension that can join an Allen Key with a torque wrench?
Snug tight is another tricky questions, as everyone's snug tight is different.
Allan Lee
RE: Turn of the Bolt Methods Implementation
http:
Here is synopsis of the bolt tensioning requirements.
http://www.boltcouncil.org/educ4.htm
RE: Turn of the Bolt Methods Implementation
Sure they make socketed allen drivers.
RE: Turn of the Bolt Methods Implementation