Looking for 7/16-10 lh acme rod

W

woodchip

Plastic

Joined

Sep 3, 2009

Location

Memphis, Tenn

• Oct 24, 2012

• #1

Hi, I need to repair my crossfeed and need some acme stock. I've sent two emails to steve wells with no response, hopefully someone here can help.

TIA Jimmy

 

W

woodchip

Plastic

Joined

Sep 3, 2009

Location

Memphis, Tenn

• Oct 24, 2012

• #2

Just received a email from steve.

Jimmy

 

J

JPD

Aluminum

Joined

Apr 30, 2018

• Dec 16, 2022

• #3

Any word on this screw? I’m looking for the same.

 

texasgeartrain

Titanium

Joined

Feb 23, 2016

Location

Houston, TX

• Dec 17, 2022

• #4

Mcmaster Carr has a pretty decent variety of acme threaded rods and nuts. It won't bolt directly on as is, but not too hard to sort out if your lathe is already operational.

 

J

JPD

Aluminum

Joined

Apr 30, 2018

• Dec 17, 2022

• #5

Thanks, I did look at McMaster, google etc. seems like 7/16-10 is an obsolete size. Can down size to 3/8-10 but even that is hard to find, with a matching tap. If I had a follow rest I’d make it, but that’s not an option unless martin model ends up casting some for the 10ee.

 

D

Dobermann

Hot Rolled

Joined

Jan 2, 2014

Location

North Carolina

• Dec 18, 2022

• #6

Depending on lathe model and clearances, you may be able to up-size to 1/2-10 LH threaded rod. I did this on my 9" Jr. and it works just fine.

 

M

moonlight machine

Diamond

Joined

Nov 19, 2007

Location

marysville ohio

• Dec 18, 2022

• #7

Green Bay Manufacturing Co. in Two Rivers Wisconsin has left and right hand lead screws in whatever diameter, pitch and length you may need. they also have oversized machine to fit nuts in bronze and cast iron. I put a 5/8 8 LH in the cross feed on my holbrook, it is accurate enough that you can use the dial with confidence. www.greenbaymfgco.com 820 793 4848 I have no skin in this game, just a very satisfied customer.

 

J

JPD

Aluminum

Joined

Apr 30, 2018

• Dec 18, 2022

• #8

Thanks guys. It is for a smaller Rivett, unfortunately not enough room to go up to 1/2”. I did try green bay, no luck on the 7/16. Smallest 10 pitch they have is 1/2.

 

M

moonlight machine

Diamond

Joined

Nov 19, 2007

Location

marysville ohio

• Dec 18, 2022

• #9

JPD said:

Thanks guys. It is for a smaller Rivett, unfortunately not enough room to go up to 1/2”. I did try green bay, no luck on the 7/16. Smallest 10 pitch they have is 1/2.

Click to expand...

Sounds like you will have to make some clearance for the 1/2". I have never seen a lathe that you could not open up a bit around the cross feed screw.

 

J

JPD

Aluminum

Joined

Apr 30, 2018

• Dec 18, 2022

• #10

Oh there is one, and I have it. Rivett has an unusual assembly and I’d be afraid to get too wild with cutting things up. There is a 3/8-10 available but I cannot find a tap from a reputable maker.

 

G

garyphansen

Titanium

Joined

Feb 9, 2004

Location

Traverse City, MI

• Dec 19, 2022

• #11

JPD You could thread mill a nut. You could grind a single point point cutter to match the gullet of the acme thread and set up a die grinder in the tool post. Then set the gear box to cut 10 thread per inch and set the lathe to cut left hand threads then turn the spindle by hand as the die grinder cuts the thread.

 

jim rozen

Diamond

Joined

Feb 26, 2004

Location

peekskill, NY

• Dec 20, 2022

• #12

Also possible to simply single-point the nut. Not that tough for a fairly small item like that.