View Full Version : Enlarging Lathe Spindle Hole?
03-06-2006, 12:56 AM
I've got an itty-bitty 7x10 (actually 7x8) mini lathe from HF. The spindle can only handle up to 5/8 through the spindle. I'm not really wanting to upgrade to the HF or Grizzly 9x series due to the price involved, because I really need it only to handle larger stock and I'd be OK with the 8" travel.
SO... can the spindle be bored out from 5/8" (.625") to 3/4" (.750")? That means removing 0.0625 from the ID of the spindle. I think it can be done, but I'm not sure what would be the best way to do it.
I would think that maybe using a chuck in the tailstock, I could chuck a reamer and spin it into the spindle, kinda like how a chamber reamer would be used. ???
Is there an easy way to cut this hard metal? Stupid idea?
03-06-2006, 01:10 AM
What's the OD of the spindle? Would removing the metal screw up the taper for centers and collets?
03-06-2006, 12:13 PM
It is a through-spindle so long stock can be inserted through the machine and anchored in the jaws. In theory I could cut a 10-foot long steel rod, 7" at a time.
The jaws certainly have enough room to accomodate a larger opening as there is enough meat on them to allow for a 3/4" hole in the center.
03-06-2006, 06:49 PM
The mini-lathe site says it can be done, they say the bore starts at 3/4 and can be reamed out to 13/16. I don't have any real experience here to be able to comment on opening up a 5/8" bore.
03-06-2006, 07:27 PM
When I work running leaths we incresed the id on a 24ft acuma so I think it will work on yours.
Like unknown said,check mini-lathe.com I read about some guys doing this and there is actually a fellow who would loan the reamer out to ya(pretty nice of him).I just bought me a mini 7x12 so i have been researching alot about these little machines...
03-07-2006, 01:43 PM
Found some more info:
Search that page for "ream", there's a link to a guy that rents a reamer just for this purpose.
03-07-2006, 02:18 PM
WELL... I missed that page by looking in the wrong section. COOL INFO. I have an adjustable reamer so it looks like all I need now is to get a chuck for the tailstock and I'm pretty sure I'd be set.