kilograms are a unit of force (kgf) and a unit of mass(kg). kgm used as a torque value is extremely common in a Japanese company. A redesign of the motor and mounting plate is not an option. Changing fasteners is also most likely not an option. I will either adjust the torque spec based on...
All of the bolt breaks have been in random places. Some at the beginning, some at the end. Some of them they don't let break, they back them out and they definately had already entered plastic deformation. All the ones that break are in the same place, right where the threads start in the...
I would have to look up preload, not sure at the moment. The plate thickness is around 25mm for the thru hole and the hydraulic motor casing that is threaded is around 150mm. There is no gasket in the joint.
The fasteners are not pressure washed, only the threaded motor housing is washed. It...
I guess you would call it a blind hole. All the bolts are placed into the front plate (hole), then the motor assembly with the threaded holes is lifted into place and all of the 21 bolts are started by hand, tightened with a small impact, and then brought to final torque with the transducerized...
We know the torque measurements are correct, we are using a transducerized Aimco dynatorque nutrunner that has been checked numerous times and calibrated. It gives a torque readout and elapsed time of torquing, and it will also do angle if we set it up to do so. Reason for the mixing of units...
I know that thread lubricants and contaminants cause the fastener torque requirement to be lower. How does water affect torque though? We have implemented torque equipment on a hydraulic motor assembly where we have 21 3/4-10 bolts to mate the plates together. The drawing is calling for 56...
