Seneca Falls Star 11" spindle taper, looking for a center

R

ronnrwb

Plastic

Joined

Jan 10, 2014

Location

Klamath Falls Oregon

• Sep 29, 2019

• #1

I have a Seneca Falls 11"x 5ft screw cutting lathe that I am looking for a center for the spindle. The taper seems to measure out at .0367" per inch. the large dia. at end of spindle is approx. 1.115". Any thoughts on what was used for centers in these machines? The catalogue shows #2mt for centers and the tailstock does take a #2mt. I am guessing they must have used an adapter in the spindle?

 

M

millermachine

Cast Iron

Joined

Feb 12, 2004

Location

Carrollton IL

• Sep 29, 2019

• #2

Hi I can make you one if needed.
Brian Miller
[email protected]
phone 618 946 0793
Miller Machine and Fabrication

 

L

L Vanice

Diamond

Joined

Feb 8, 2006

Location

Fort Wayne, IN

• Sep 29, 2019

• #3

Page 10 of this catalog shows that they did use an adapter for their collets.

http://www.senecafallsmachines.com/STAR LATHES.pdf

Larry

 

R

ronnrwb

Plastic

Joined

Jan 10, 2014

Location

Klamath Falls Oregon

• Sep 29, 2019

• #4

I'll give you a call this week. Having one made will probably be the easiest. Thanks Ronn

 

R

ronnrwb

Plastic

Joined

Jan 10, 2014

Location

Klamath Falls Oregon

• Sep 29, 2019

• #5

I looked at the catalog my guess is they probably used an adapter for the center too. Thanks

 

L

LeeSt

Plastic

Joined

Oct 30, 2019

• Oct 30, 2019

• #6

Hi, I just joined here, also have a 12” Seneca Falls lathe, I need spindle center adapter too. I’m not a professional machinist. I don’t see any taper in the spindle bore. Maybe 2deg but that only extends in for 1/2”. Maybe 1.15dia from there thru. Very rough bore. I don’t get how an adapter would not spin in the spindle bore with almost no taper?

 

Last edited: Oct 31, 2019

enginebill

Stainless

Joined

Feb 17, 2005

Location

Plymouth Meeting PA

• Oct 30, 2019

• #7

Post some clear photos, there is probably something in the bore now.

 

L

LeeSt

Plastic

Joined

Oct 30, 2019

• Oct 30, 2019

• #8

Ok, thanks, good thought. I’ll do it when I get home. An old Star lathe sales brochure says the 12” should allow 1” stock thru the spindle, and mine does. I don’t know what’s up, but I’ll take a photo.

 

Last edited: Oct 31, 2019

L

LeeSt

Plastic

Joined

Oct 30, 2019

• Oct 30, 2019

• #9

Photos of my 12” lathe spindle. You can see a taper only goes in about 1/2”. I don’t see a MT2. What am I missing?

 

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Last edited: Oct 31, 2019

R

Riderusty

Hot Rolled

Joined

Jan 19, 2002

Location

Sea Cliff, NY & Portland, OR USA

• Oct 31, 2019

• #10

My 9" Seneca Fall Star lathe has a Jarno #8 taper in the headstock, #3 in the tailstock. Jarno taper was common in that era-you might check that out. S/F may have provided whatever taper the customer wanted.

Tom B.

 

enginebill

Stainless

Joined

Feb 17, 2005

Location

Plymouth Meeting PA

• Oct 31, 2019

• #11

LeeSt said:

Photos of my 12” lathe spindle. You can see a taper only goes in about 1/2”. I don’t see a MT2. What am I missing?

Click to expand...

It looks like someone might have bored it out for a collet.

 

L

LeeSt

Plastic

Joined

Oct 30, 2019

• Oct 31, 2019

• #12

Is a key way needed to keep the collet from spinning? I don't know much about collets. A 5C wouldn't fit, my spindle bore could take a 1.125dia.

 

L

L Vanice

Diamond

Joined

Feb 8, 2006

Location

Fort Wayne, IN

• Oct 31, 2019

• #13

LeeSt said:

Is a key way needed to keep the collet from spinning? I don't know much about collets. A 5C wouldn't fit, my spindle bore could take a 1.125dia.

Click to expand...

Yes, a key is needed to keep the collet from turning while tightening and loosening the draw bar. Friction on the tapered part of the collet keeps it from spinning once the collet is tightened on the workpiece. The key is likely a steel pin inserted through the spindle wall about 3 inches back from the nose.

The most common collet with a 1.125 body is a Hendey No. 3, which Hardinge called 3H. See below for the other dimensions. I have 17 of those collets that I would sell. Keep in mind that the tube of the draw bar will be bigger than 1.125, like 1.25 inches or so, so see if there is a bore that big to the left of the 1.125 inch bore.

Larry