Spindle thread size on Buffalo Power BP-1236? The chuck is off!!!

[jlficken]

Does anyone have any idea what size the spindle is? I can’t get the chuck off but was going to order another adapter plate so I have one when I actually get it off.

It’s smaller than 2-1/4 x 8 but larger than 2”. Could it be metric?

It was made in Taiwan in 1984. I have the manual that came with it, however, it's beyond useless as it says that it uses a D4 type spindle...which is wrong as it's most definately threaded.

ETA: Another thing that might help is the equivalent of this but in imperial if anyone knows of one I could print.

ETA: Found a printable imperial thread gauge set here.

 

[markba633csi]

I think they had a 2-1/8" x 8 size

 

[jlficken]

I think they had a 2-1/8" x 8 size

That may very well be as I've tried 2-1/4" x 8 and 2" x 8 and one was too big and the other too small so I'm printing a 2-1/8" x 8 now to test. I'll know in an hour or so.

I was just hoping it wasn't metric or something. Now if it is 2-1/8" I'll have to see if I can find a semi-finished backing plate for that size as CME Tools doesn't carry one.

 

[jlficken]

2-1/8” x 8tpi is very sloppy.

Could it be 2-3/16” x 8tpi possibly or should there be quite a bit of slop (side to side motion)?

 

[jcp]

The shop I worked in had a Taiwanese Summit 11X 32 lathe that used a 54mm x 3 pitch spindle nose. 54 mm is 2.12598". I would measure the pitch with a metric 3mm gauge and double check. 3mm is .11811". This thread can very easily confused with a 2 1/8 x 8 thread.

 

[matthewsx]

I’m surprised that’s not the same as mine. Looks just like a Tida.








Not sure I understand how you’ve determined its size without removing the chuck. I’d probably wait until I had it off before ordering anything.


John

 

[matthewsx]

What have you tried for removing the chuck so far?

John

 

[jlficken]

I’m surprised that’s not the same as mine. Looks just like a Tida.

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Not sure I understand how you’ve determined its size without removing the chuck. I’d probably wait until I had it off before ordering anything.


John

It does look like yours.

I have a face plate that came with it that I’m trying to test with.

 

[jlficken]

What have you tried for removing the chuck so far?

John

So far I’ve just tried Kroil with a 1.5” piece of hex in the chuck and an impact wrench to get it loose.

That was after I tried very lightly locking the back gear and a crescent wrench. I stopped that idea so I didn’t break anything though.

There’s no reverse option on this lathe or it’s not wired up anyway.

 

[matthewsx]

So far I’ve just tried Kroil with a 1.5” piece of hex in the chuck and an impact wrench to get it loose.

That was after I tried very lightly locking the back gear and a crescent wrench. I stopped that idea so I didn’t break anything though.

There’s no reverse option on this lathe or it’s not wired up anyway.

It will come off with the magic ingredient.

Patience….

Try locking the back gear and putting a cheater on your wrench with a weight hanging off the end as you’ll see detailed elsewhere on the forum.

Let’s get the chuck off and go forward from there.

John