Heavy 10 spindle / 5MT

S

SteveM

Diamond

Joined

Sep 22, 2005

Location

Wisconsin

• Apr 17, 2021

• #1

I got a 5MT backplate along with some other stuff.

I'm looking for a Heavy 10, and I think the spindle is some sort of proprietary "short" 5MT.

Would I be able to use a 5MT shank in the spindle?

Just trying to decide if I should keep this for later use.

Steve

 

J

jwearing

Hot Rolled

Joined

Aug 26, 2017

• Apr 17, 2021

• #2

5MT is quite a bit larger than the 10L taper.

 

johnoder

Diamond

Joined

Jul 16, 2004

Location

Houston, TX USA

• Apr 17, 2021

• #3

Would I be able to use a 5MT shank in the spindle?

Click to expand...

From the horses mouth. Depends on if MT5 is .602 taper per foot on dia.- too bad its .631 TPF like in here

Standard Tapers

 

SLK001

Stainless

Joined

Feb 8, 2015

Location

Coral Springs, FL USA

• Apr 17, 2021

• #4

The H10 spindle is a proprietary taper. It has the same taper as a MT#3, but has a larger diameter (1.628" at the large end). Your MT#5 backplate won't properly fit (if at all).

 

texasgeartrain

Titanium

Joined

Feb 23, 2016

Location

Houston, TX

• Apr 17, 2021

• #5

The proprietary South Bend Taper No3 is close to #5mt, but shorter. There's some other threads on it here somewhere with specs, but you need to search it up.

I believe at least some if not all heavy 10's use it. If you look at Miller fabrication's webpage down to test bars it lists it from 10's to 16":
Products – Miller Machine and Fabrication

The mt5 is not interchangeable with it though. I do recall a thread here maybe from 2012 or earlier where a guy had one crammed in in claimed it was ok , but no, its not.

I've got both South Bend No3 and 5mt test bars, the mt5 isn't going in there.

Some specs of South Bend tapers here:
Getting Another South Bend 16x6 Operational

Going back a little further in the thread to post #96 there some discussion on the tapers too:
Getting Another South Bend 16x6 Operational

 

D

Dobermann

Hot Rolled

Joined

Jan 2, 2014

Location

North Carolina

• Apr 18, 2021

• #6

I believe you'll find that a #5 Morse taper fits some of the 12" Chinese lathes--Grizzly Gunsmith lathe for example. It's not going to fit a South Bend 10"

 

johnoder

Diamond

Joined

Jul 16, 2004

Location

Houston, TX USA

• Apr 18, 2021

• #7

See post #3

If 5MT is .631 and SB is .602, the 5MT is off OVER .002 on dia per inch

Or as so well stated in Post #4

Your MT#5 backplate won't properly fit (if at all).

Click to expand...

 

texasgeartrain

Titanium

Joined

Feb 23, 2016

Location

Houston, TX

• Apr 18, 2021

• #8

johnoder said:

From the horses mouth. Depends on if MT5 is .602 taper per foot on dia.- too bad its .631 TPF like in here

Standard Tapers

View attachment 319192

Click to expand...

I hadn't zoomed on your pic, I thought is was a chart from your "standard tapers" link.

 

S

SteveM

Diamond

Joined

Sep 22, 2005

Location

Wisconsin

• Apr 27, 2021

• #9

Thanks guys. That clears it up.

If anyone needs a 5MT backplate, let me know.

Steve