10 HP universal pump rpm question

[Longyearfarm]

Hi all. I have my eye on a 10hp universal vacuum pump on Craigslist right now. The unit comes without a motor, but the seller claims a 10hp elec motor came off of it. I have a 7hp 3450 rpm motor, which obviously is too fast, but I could reduce the rpms by increasing the pulley sizes. I haven’t done the math yet to see what size pulleys I would need, but I was curious if anyone knows what rpms these pumps were supposed to run at. 800 rpms comes to mind, but I’m not sure if that’s correct. Thanks in advance

[Bricklayer]

Can't help you with the pump specs but I use this calculator all the time. Might help with figuring out pully sizes.

https://www.blocklayer.com/pulley-belteng.aspx

[Longyearfarm]

Thanks. That’s a great link!

[BreezyHill]

700 to 1000 rpm is a standard speed for them.

your motor is not meant to run this slow of a device so start up may be difficult on the belts.