Is there an automated machine for performing a breaking torque measurement on bolts and screws? 1

[mxracer17788]

Hi all,

One of our departments is required to perform a simple breaking torque inspection on all fasteners that come in from the vendor. Traditionally, we just use a torque wrench and a vice to increase the torque until the bolt head breaks off. Obviously, this requires a great deal of time and labor and we were hoping to automate this process given the high volume of fasteners that require receiving inspections. Does anyone know of any machines that are available that will perform a loaded test that will calculate the max torque at fracture? If not, any ideas on how to automate this process?

Thanks,
Jeff

 

[CoryPad]

Here are some fastener testing equipment manufacturers that have suitable solutions.

http://www.schatz.ag/cat6174.html

http://www.pcbloadtorque.com/t-pcb_LabMaster_Professional.aspx

http://www.test-gmbh.com/en/d_en/d_en_0000_index.html

 

[Screwman1]

I agree with Cory's response; those are all good.
My question is why are you doing this test? Doesn't your vendor provide you with any inspection results? If you are trying to see if the parts are properly heat treated you can get the same result with hardness results. Ultimate torsional strength as an incoming inspection requirement is odd- it's a secondary characteristic of the other factors in the part.