turn of the nut proceedure on a 1-1/2" stud

[jbar1]

how are we to proceed with this torque method.These 4 studs per are retaining a 6" dia shaft

 

[DVWE]

Hydraulic wrenches will probably be your best bet. Here is a web-site to a popular one, there are many others and plenty of places rent them...

http://www.hytorc.com

Another method you may want to consider, if the torque required on the nut is large, is stud tensioning. Really is a superior method to torquing a nut.

http://www.htico.com/variable-stud-tensioners.html

 

[Duwe6]

The problem with turn-of-the-nut is that the length of the bolt/stud changes the required rotation needed.

 

[tothepoint]

Take a look at jack-bolt nuts like Superbolt.