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I was commenting on the max speed limitation of the Power Station, not its power. And suggesting that the OP stay away from the lower end of the speed range and try to get closer to the speed recommended for a Mark mount. IIRC the Power Station is 3/4 HP, same as a Greenie which was adequate in my experience running at ~5500 RPM.
Sorry, when I wrote 'slower speed' I meant 5500 as opposed to 5900, because you mentioned 5500 as adequate.DLB wrote: ↑Thu Dec 02, 2021 10:27 am I was commenting on the max speed limitation of the Power Station, not its power. And suggesting that the OP stay away from the lower end of the speed range and try to get closer to the speed recommended for a Mark mount. IIRC the Power Station is 3/4 HP, same as a Greenie which was adequate in my experience running at ~5500 RPM.
- David
Sorry I don't have any direct experience with a power stand. In the picture you posted it shows the hole in the top of the stand being about the same width as the space between the "feet" of the SPT stand. Is this the same on your Power Stand? If so, turning the SPT Stand around will not gain any additional belt clearance. The problem now appears to be the link belt and how it is constructed requiring additional clearance which could be corrected with a conventional V belt. One thing I didn't mention before but there has been a lot of discussion now is pulley diameters. Certainly, smaller pulleys would narrow the needed opening they pass through and still achieve the correct speed. Right now, the most inexpensive change would be to a conventional V belt.With the motor running, the link belt expands a bit to the point that it rubs on the two feet of the eccentric tube mounting base.
I am running a 3.5" pulley at the cutter head, the new motor pulley is 5.95" and motor RPM is 3450 giving me a cutter head RPM of 5815. That appears to be within spec,JPG wrote: ↑Thu Dec 02, 2021 10:23 am One can ignore the difference between the od and the pitch diameter (assuming equivalent v groove dimensions) unless considering belt linear speed. Unfortunately the OP has already obtained a new motor pulley equal to that originally on it. A more ideal 'solution' would to have obtained a smaller motor pulley so as to achieve more ideal cutter rpm.
I don't have the official "Power stand". I have a similar stand that has a more open frame, so the only impediments for the link belt expansion are the "feet" of the eccentric tube base. I'm going to try turning the base around, taking into consideration someone else's (@Majones1) suggestion that the large feet might be on the pulley side to provide support for the downward force of the belt on the pulley.chapmanruss wrote: ↑Thu Dec 02, 2021 11:22 am garyshell,
You said
Sorry I don't have any direct experience with a power stand. In the picture you posted it shows the hole in the top of the stand being about the same width as the space between the "feet" of the SPT stand. Is this the same on your Power Stand? If so, turning the SPT Stand around will not gain any additional belt clearance. The problem now appears to be the link belt and how it is constructed requiring additional clearance which could be corrected with a conventional V belt. One thing I didn't mention before but there has been a lot of discussion now is pulley diameters. Certainly, smaller pulleys would narrow the needed opening they pass through and still achieve the correct speed. Right now, the most inexpensive change would be to a conventional V belt.With the motor running, the link belt expands a bit to the point that it rubs on the two feet of the eccentric tube mounting base.