07-01-2017, 01:16 PM
Yes, the motor is listed at 1700rpm so dropping from a six inch to a three inch Viel pulley should drop the SFM from 2670 to 1335. Hopefully, I can test the rpm on Monday to see the actual SFM range of the motor with the variability. I don't plan on changing the factoring settings.
You have me thinking about how I can measure the increase in torque, but my guess would be that the torque should double since, if I remember right, speed and torque are the inverse of each other. Hopefully, someone can chime in on this. I've used one of Rupert's belt grinders that also runs at 1700rpm and it has no problems removing stock.
Yes, you noticed correctly. The motor is mounted lower and closer to the front to help compensate for the change in diameter. I did have to increase the height of arm by adding spacers below the spring. Yes, Rupert showed me the knurled knobs that I needed to replace the tracking screws. Now adjustment does not require any tool. They were 10-24 x 7/8 and we got them at the local hardware store.
You have me thinking about how I can measure the increase in torque, but my guess would be that the torque should double since, if I remember right, speed and torque are the inverse of each other. Hopefully, someone can chime in on this. I've used one of Rupert's belt grinders that also runs at 1700rpm and it has no problems removing stock.
Yes, you noticed correctly. The motor is mounted lower and closer to the front to help compensate for the change in diameter. I did have to increase the height of arm by adding spacers below the spring. Yes, Rupert showed me the knurled knobs that I needed to replace the tracking screws. Now adjustment does not require any tool. They were 10-24 x 7/8 and we got them at the local hardware store.