• Hi Guest!
    If you appreciate British Car Forum and our 25 years of supporting British car enthusiasts with technical and anicdotal information, collected from our thousands of great members, please support us with a low-cost subscription. You can become a supporting member for less than the dues of most car clubs.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

crank shaft thread die

Share this page

John Loftus

John Loftus

Darth Vader
Offline
Hey Healey-holics,

I'm searching round for a 1" -20 tpi rethreading die for cleaning up the crankshaft threads where the dog nut theads on but having trouble finding one through McMaster, Rutland, etc.

Anybody have one to borrow/loan/purchase or can steer me in the right direction?

As an alternative, would you suggest using a 20 tpi thread file or is the rethread die the only way to go.

Cheers,
John
 
Hi John,
I believe a 1" x 20 thread would be a "Unified National Extra Fine" thread.

You could see a listing here:
https://www.newsontool.com/05_c08.html

The die & a handle (stock) to turn it would be very costly, as would even a thread "chaser".

A standard 20 TPI thread file would likely have a 60 degree profile, the UNEF would be 60 degree. I think careful work with a regular three corner file would straighten the threads.

I have split one side of a matching nut to allow it to expand enough to get it started & then used it as a die, sometimes with lapping compound. Not fun, not easy, & very slow.

If things are not screwed up too badly, the file might do the trick.

Maybe you can borrow something locally or take it to a machine shop.

Glad it's not mine. You have my sympathy.
D
 
John Loftus said:
Hey Healey-holics,

I'm searching round for a 1" -20 tpi rethreading die for cleaning up the crankshaft threads where the dog nut theads on but having trouble finding one through McMaster, Rutland, etc.

Anybody have one to borrow/loan/purchase or can steer me in the right direction?

As an alternative, would you suggest using a 20 tpi thread file or is the rethread die the only way to go.

Cheers,
John
Click to expand...
John,
British Car Specialist in Stockton, Calif. have them in stock. Not cheap!
Patrick
 
Hi John,
Give the guys at Allen Bolt a call. I’m 95%ish sure they would have what you need. I bought a left hand die from them for the door check strap bolt.\
Allen Bolt
 
Dave Russell said:
If things are not screwed up too badly, the file might do the trick.
Click to expand...

Hi Dave,
Luckily things are not screwed up too badly. Shortly after buying the Healey I heard a strange noise from the engine compartment. Turned out the Dog nut had worked loose and was rattling around. It didn't fall off because the frame cross member kept it on but it did screw up the threads on the nut(I guess the nut threads were softer than the crank threads). I used the dog nut off my spare motor and it worked fine for several years. Now that the motor has been rebuilt I noticed the threads look a bit beat up on the crank and the dog nut needs to be replaced. I just want to clean things up so I don't have any problems.

Speaking of extra fine threads. I asked a buddy who rebuilds suspensions for mountain bikes what they use for the old style 1" steerer tubes and it's 24 tpi.

I appreciate all the leads (thanks guys!). Turns out there are several sources that carry the die for around $25 to $35 so I'll just order one up and have it if anyone needs to borrow it.

Cheers,
John
 
John Loftus said:
Dave Russell said:
If things are not screwed up too badly, the file might do the trick.
Click to expand...

Hi Dave,
Luckily things are not screwed up too badly. Shortly after buying the Healey I heard a strange noise from the engine compartment. Turned out the Dog nut had worked loose and was rattling around. It didn't fall off because the frame cross member kept it on but it did screw up the threads on the nut(I guess the nut threads were softer than the crank threads). I used the dog nut off my spare motor and it worked fine for several years. Now that the motor has been rebuilt I noticed the threads look a bit beat up on the crank and the dog nut needs to be replaced. I just want to clean things up so I don't have any problems.

Speaking of extra fine threads. I asked a buddy who rebuilds suspensions for mountain bikes what they use for the old style 1" steerer tubes and it's 24 tpi.

I appreciate all the leads (thanks guys!). Turns out there are several sources that carry the die for around $25 to $35 so I'll just order one up and have it if anyone needs to borrow it.

Cheers,
John
Click to expand...
Hi John,
I had a prices given to me up to $135.00 for the die. Could you share the sources for the cheaper dies?
Thanks,
Patrick
 
Hi John:

And this time when you put the new nut on be sure and use an Impact wrench.--Keoke
 
GregW said:
Hi John,
Give the guys at Allen Bolt a call
Click to expand...

They can get one .. $65

Rutland Tool has them for $35.98 (part #21080434)

and as Anthony pointed out, Victornet.com has them for $27.50
(item rd-1-20 -d = 1"20 hs die)

and for about $10 one can get a hex adapter that the 2" die will fit into or get a 2" die handle.

Cheers,
John
 
Keoke said:
Hi John:

And this time when you put the new nut on be sure and use an Impact wrench.--Keoke
Click to expand...

Hi Keoke,

There's this guy who lent me a 1 11/16" standard socket. I'm sure he wouldn't mind if I used it with my impact wrench. /bcforum/images/%%GRAEMLIN_URL%%/hammer.gif

Cheers,
John
 
John Loftus said:
Keoke said:
Hi John:

And this time when you put the new nut on be sure and use an Impact wrench.--Keoke
Click to expand...

Hi Keoke,

There's this guy who lent me a 1 11/16" standard socket. I'm sure he wouldn't mind if I used it with my impact wrench. /bcforum/images/%%GRAEMLIN_URL%%/hammer.gif

Cheers,
John
Click to expand...
dampener_socket.JPG
 
Me too Dave, I didn' have to do no neckin or nothin and I don't need no steeking adapter either. But then some folks just gotta make a moutain out of a mole hill.--Keoke-- /bcforum/images/%%GRAEMLIN_URL%%/laugh.gif
 
John Loftus said:
I'm sure he wouldn't mind if I used it with my impact wrench. /bcforum/images/%%GRAEMLIN_URL%%/hammer.gif

Cheers,
John
Click to expand...
Sure John,
I’d only ask that you don’t hook it up to the air compressor.
 
GregW said:
John Loftus said:
I'm sure he wouldn't mind if I used it with my impact wrench. /bcforum/images/%%GRAEMLIN_URL%%/hammer.gif

Cheers,
John
Click to expand...
Sure John,
I’d only ask that you don’t hook it up to the air compressor.
Click to expand...


Yep Greg, all he needs is the Jacobs Electric.---Keoke- /bcforum/images/%%GRAEMLIN_URL%%/grin.gif
 
Keoke said:
Me too Dave, I didn' have to do no neckin or nothin and I don't need no steeking adapter either. But then some folks just gotta make a moutain out of a mole hill.--Keoke-- /bcforum/images/%%GRAEMLIN_URL%%/laugh.gif
Click to expand...
What's the point of having a garage full of cool tools if you can't make up reasons to use them (my wife has been led to believe I can't survive without them)?
 
Randy /bcforum/images/%%GRAEMLIN_URL%%/savewave.gif

Fist time I get up that way I will be sure and have a long talk with your Missus.---Keoke---- /bcforum/images/%%GRAEMLIN_URL%%/laugh.gif
 
Back
Top