Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 06-30-2017, 07:26 PM   #1
Lawson Cox
Senior Member
 
Lawson Cox's Avatar
 
Join Date: May 2010
Location: Above the gnat line in Georgia
Posts: 7,009
Default thread size on early Ford grease fitting

What size drill and tap size for early Ford grease fittings, 1/4 NPT?

Going to tap cap on steering box to install grease fitting so I can fill with John Deer corn head grease.

'bout done with horn repair. Should zip it up tomorrow.
__________________
Life is like a roll of toilet paper. The closer to the end, the faster it goes.

It is better to be seen, than viewed.

"We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm".
Lawson Cox is offline   Reply With Quote
Old 06-30-2017, 07:49 PM   #2
woodiewagon46
Senior Member
 
Join Date: Jun 2012
Location: Long Island,NY
Posts: 1,551
Default Re: thread size on early Ford grease fitting

Lawson, I believe you are looking for 1/8" pipe. The tap drill for 1/8' pipe is R drill (.399). If you are looking for 1/4" pipe the drill size is 7/16".
woodiewagon46 is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 06-30-2017, 08:51 PM   #3
Lawson Cox
Senior Member
 
Lawson Cox's Avatar
 
Join Date: May 2010
Location: Above the gnat line in Georgia
Posts: 7,009
Default Re: thread size on early Ford grease fitting

Quote:
Originally Posted by woodiewagon46 View Post
Lawson, I believe you are looking for 1/8" pipe. The tap drill for 1/8' pipe is R drill (.399). If you are looking for 1/4" pipe the drill size is 7/16".
Thanks. That's what I thought. Just looking for confirmation.
__________________
Life is like a roll of toilet paper. The closer to the end, the faster it goes.

It is better to be seen, than viewed.

"We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm".
Lawson Cox is offline   Reply With Quote
Old 06-30-2017, 08:14 PM   #4
Brian
Senior Member
 
Brian's Avatar
 
Join Date: May 2010
Location: Masterton, New Zealand
Posts: 3,816
Default Re: thread size on early Ford grease fitting

I think you'll find the plug in a steering box is something like 5/8 NF, not a regular pipe thread.
__________________
Unfortunately, two half wits don't make a whole wit!
Brian is offline   Reply With Quote
Old 06-30-2017, 08:48 PM   #5
Lawson Cox
Senior Member
 
Lawson Cox's Avatar
 
Join Date: May 2010
Location: Above the gnat line in Georgia
Posts: 7,009
Default Re: thread size on early Ford grease fitting

Quote:
Originally Posted by brian View Post
i think you'll find the plug in a steering box is something like 5/8 nf, not a regular pipe thread.
i am going to tap the stock cap for a grease fitting.
__________________
Life is like a roll of toilet paper. The closer to the end, the faster it goes.

It is better to be seen, than viewed.

"We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm".
Lawson Cox is offline   Reply With Quote
Old 06-30-2017, 09:02 PM   #6
ford35lh
Senior Member
 
Join Date: May 2010
Location: Upstate; The Real New York
Posts: 441
Default Re: thread size on early Ford grease fitting

Sponsored Links (Register now to hide all advertisements)
Woodiewagon46 ,I think you made a typo. An R drill is .339.

Lawson, a 11/32 drill is .005 larger than the R drill.
Try it on a test piece and tap a little at a time until the grease
fitting is at the desired depth.
ford35lh is offline   Reply With Quote
Old 06-30-2017, 09:15 PM   #7
Brian
Senior Member
 
Brian's Avatar
 
Join Date: May 2010
Location: Masterton, New Zealand
Posts: 3,816
Default Re: thread size on early Ford grease fitting

The original cap is only a pressed tin affair, I suspect that if you put a tap through it, there'll be insufficient threads for a grease zerk to hold. Hence, suggest you find a 5/8 bolt.
__________________
Unfortunately, two half wits don't make a whole wit!
Brian is offline   Reply With Quote
Old 07-01-2017, 09:00 AM   #8
woodiewagon46
Senior Member
 
Join Date: Jun 2012
Location: Long Island,NY
Posts: 1,551
Default Re: thread size on early Ford grease fitting

ford35, yes, you are correct, thats why I failed math, thanks!
woodiewagon46 is offline   Reply With Quote
Old 07-01-2017, 07:57 PM   #9
Capsacto
Member
 
Capsacto's Avatar
 
Join Date: Sep 2015
Location: NorCal
Posts: 68
Default Re: thread size on early Ford grease fitting

I just use a 1 1/2" long needle grease gun tip to pump JDCH grease into the steering box. The needle allows you to get the grease into the tight spaces.
Attached Images
File Type: jpg IMG_0608.jpg (49.2 KB, 13 views)
__________________
Ed

"I find that the harder I work, the more luck I seem to have."
- Thomas Jefferson

Last edited by Capsacto; 07-03-2017 at 07:12 PM. Reason: Picture added
Capsacto is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 08:28 AM.