SKinzel
Mechanical
- Aug 28, 2003
- 17
Hello everybody,
I'm fairly new to the forum and have a question. A customer wants me to calculate the break away torque for a redesigned increasing gear drive. We are changing the ratio so he needs to select a new electric motor and this is the first time a customer has asked me for a break away torque.
I can calculate the WR^2 for both shafts but I'm not sure how to calculate what the break away torque for the reducer will be. With the input on the low speed shaft, would the break away torque be calculated using WR^2 referred to that shaft? WR^2 has units of lb-in^2 and torque has units of lb-in so I'm not sure how to find a torque from WR^2.
The unit has plain journal bearings so I imaging that will have some effect but I'm not sure if I need to consider that.
Any help is appreciated.
Stuart Kinzel
I'm fairly new to the forum and have a question. A customer wants me to calculate the break away torque for a redesigned increasing gear drive. We are changing the ratio so he needs to select a new electric motor and this is the first time a customer has asked me for a break away torque.
I can calculate the WR^2 for both shafts but I'm not sure how to calculate what the break away torque for the reducer will be. With the input on the low speed shaft, would the break away torque be calculated using WR^2 referred to that shaft? WR^2 has units of lb-in^2 and torque has units of lb-in so I'm not sure how to find a torque from WR^2.
The unit has plain journal bearings so I imaging that will have some effect but I'm not sure if I need to consider that.
Any help is appreciated.
Stuart Kinzel