Brake Motor Max Loading
Brake Motor Max Loading
(OP)
I am looking into buying a brake motor to support a vertical load. Our current design is a 200 to 1 two stage reduction gear reducer. The torque at the output of the reducer is around 3500in-lbs. I am looking at a leeson brake motor catalog #114167 that's brake can support 72in-lbs of torque. Based on that the calculation be as simple as:
1) 3500in-lbs/.7 = 5000in-lbs <-------I'm increasing the output torque to account for the loss of efficiency of the gearbox
2) 5000in-lbs/200 = 25in-lbs <-------I'm now dividing the torque at the output by the gear ratio to get the input torque at the shaft
Because 25in-lbs is less than the rated 72in-lbs I should be good correct?
I just want to make sure I'm thinking about this correctly
Thanks
1) 3500in-lbs/.7 = 5000in-lbs <-------I'm increasing the output torque to account for the loss of efficiency of the gearbox
2) 5000in-lbs/200 = 25in-lbs <-------I'm now dividing the torque at the output by the gear ratio to get the input torque at the shaft
Because 25in-lbs is less than the rated 72in-lbs I should be good correct?
I just want to make sure I'm thinking about this correctly
Thanks





RE: Brake Motor Max Loading
It is sometimes difficult to evaluate gearbox efficiencies because they change with wear, temperature, lubrication, manufacturing tolerances, alignment of drive shafts etc. So assume 100% efficiency for the load holding function and know that this will result in an overestimate of the brake torque you will actually require. I think that means that a brake torque of just 17.5 in-lbs would be sufficient.
If your brake is on the motor then any failure in the drive train or gearbox will cause the load to drop. The closer you can move the brake to the load the more failures you can tolerate - but you will then need your brake to have a higher torque.
DOL
RE: Brake Motor Max Loading