Hello. First post here but I’ve read around quite a bit. I Picked up this 1920s? Pratt Whitney 10” engine lathe and looking to get into metal working. It has all the threading gears and came with some tooling and both a 3 and 4 tooth chuck etc... Already ordered a couple books to learn more.
My question is regarding setting up a motor. I have single phase 120 and 240 power in my shop and a 3 phase 3hp GE induction motor (1725 rpm). Planning to buy a foreign 5hp VFD to run it in my shop.
My problem is: the back (bull) gear has a few broken teeth and therefore is probably not useable unless fixed..?
Would I be able to run the lathe without the back gear via direct drive from motor to the spindle and rely on the VFD for speed control?
Or should I plan on running an idle shaft with say a 3” v belt from motor to 10 or 12” v belt pulley on idle shaft with a smaller flat belt pulley also on idle shaft to the spindle? Basically use pulleys to slow the rpm?
Or.. should I run direct drive from motor to spindle and attempt to repair the broken teeth on the bull gear so I can use the it if needed.
Probably just doing hobby stuff won’t really run if for more than an hour at a time most likely.
Thanks in advance.
My question is regarding setting up a motor. I have single phase 120 and 240 power in my shop and a 3 phase 3hp GE induction motor (1725 rpm). Planning to buy a foreign 5hp VFD to run it in my shop.
My problem is: the back (bull) gear has a few broken teeth and therefore is probably not useable unless fixed..?
Would I be able to run the lathe without the back gear via direct drive from motor to the spindle and rely on the VFD for speed control?
Or should I plan on running an idle shaft with say a 3” v belt from motor to 10 or 12” v belt pulley on idle shaft with a smaller flat belt pulley also on idle shaft to the spindle? Basically use pulleys to slow the rpm?
Or.. should I run direct drive from motor to spindle and attempt to repair the broken teeth on the bull gear so I can use the it if needed.
Probably just doing hobby stuff won’t really run if for more than an hour at a time most likely.
Thanks in advance.