clutch pushrod

6 millimeter. Silver steel. Hardened both ends. I usually make them in two pieces and a 6 millimeter bearing ball between them.
 
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What is Silver Steel? | Metal Supermarkets UK

Silver Steel is a round metal bar stock made from tool steel that has been ground and polished to tight tolerances. It is generally supplied unhardened.
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"Silver Steel is a round metal bar stock made from tool steel that has been ground and polished to tight tolerances. It is generally supplied unhardened and is therefore readily machine workable making it an ideal product to use to manufacture tools."
 
The description of silver steel above is similar to what Canadian toolmakers call drill rod. They are probably the same thing with different names but I don't know for sure. Best to find out the type of tool steel one is working with and as for the heat treating (if necessary)it is TRICKY especially with round slender stock to keep straight, and the type of tool steel for the proper quenching medium. One may want to get a few feet extra. Also tempering the steel back after hardening is important so it isn't brittle.
 
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baz said:
Hmmm I've never heard of drill rod before , same as silver steel I guess?
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Another cross-the-pond vernacular oddity?
Looks to be the same type of stuff. 35 years ago we called something similar "TGP", for Turned, Ground & Polished.
 
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BERT said:
The description of silver steel above is similar to what Canadian toolmakers call drill rod. They are probably the same thing with different names but I don't know for sure. Best to find out the type of tool steel one is working with and as for the heat treating (if necessary)it is TRICKY especially with round slender stock to keep straight, and the type of tool steel for the proper quenching medium. One may want to get a few feet extra. Also tempering the steel back after hardening is important so it isn't brittle.
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I would not bother hardening it at all. Has anyone dragged a file across an OEM rod?
 
ILLF8ED said:
Hey Seattle,

Andover Norton sells a clutch pushrod for £8.14. Why make one?

David
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Because twice in the last couple of years I have come up with a pushrod too short for the project. I could stop the project for a week or so then start up when the pushrod arrives or I could just make one and continue on. I can buy three feet of drill rod pretty cheap (double the cost with shipping).
 
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I had to make a custom length clutch push rod when fitting a Hemmings Commando belt drive clutch to my TTI gearbox and at the suggestion of the tech at TTI I used 15/64" W1 ( water hardening )drill rod.
I got this from Ballard industrial ( 4749 Ballard Ave NW, Ballard ,Seattle) although I don't see it currently listed on their website. Might be worth giving them a call. Alternatively McMaster Carr lists it as part number 8890K207.
I hardened it at both ends but didn't bother tempering it, since in this application I didn't see any brittleness at the ends as being a problem.
Somewhere on this forum is a thread , I think started by Kenny Cummings, recommending 6mm rod (6mm = .2362" 15/64 = .2347") rather than using 1/4", since the 1/4 rod can bind , heat up , bell out and cause problems. He found out the hard way. Hope this helps.
Duncan
 
SeeleyWeslake said:
Somewhere on this forum is a thread , I think started by Kenny Cummings, recommending 6mm rod (6mm = .2362" 15/64 = .2347") rather than using 1/4", since the 1/4 rod can bind , heat up , bell out and cause problems.
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Yes, the standard pushrod diameter is 6.0mm and not 1/4".
clutch pushrod
 
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