Case hardening the jackshaft

[FurryOnTheInside]

Would it be risky to case harden the jackshaft after hollowing it out? I mean would it possibly come out bent?
Would there be any advantage in hardening it anyway? I'm only asking because I'm bored and I have an over active mind. lol.

 

[battery]

if they could make a hardend jack shaft it would be benificial as it seems to swell and hammering it out only makes it worse and I'm sure its not good for the bearings.

 

[FurryOnTheInside]

They "could" but then so can you or I or the bloke down the road with a torch and a bucket of case hardening compound.
http://www.technologystudent.com/equip1/heat2.htm

Not sure why you're hammering it out, lack of gear pullers I guess. I don't think case hardening would make that much difference to swelling due to hammering on the end of the shaft, unless you repeat the process several times to deepen the hardened layer.. going by what I've read.

Did you hammer your jackshaft out when you changed your 11T for a 10T? :smash7:

 

[FurryOnTheInside]

For case hardening compound try eBay or model railway hobby shops.

I was just thinking it might make for a more resilient keyway.. and give me something to show off about haha.

 

[battery]

I do have a gear puller. but I would have to put a hole in the middle of the shaft for it to grip. and the gear is ver hard to get a grip on. I guess my gear puller is a bit too big.

 

[battery]

I have not had any trouble with the keyway as of yet.

 

[keatonx]

I case hardened a bearing cup that was already hot from brazing on a sprocket, using sugar as the hardening compound. Read it somewhere that it works. I put on tons of sugar so I ate the chunks of caramel/burnt sugar that resulted

I probly should've let the brazed part cool and normalize first, but I was just doing it cuz it was already hot.

 

[FurryOnTheInside]

I have not had any trouble with the keyway as of yet.

But it sounds good though doesn't it? "Myyy jackshaft is hollowed and case hardened" lol

 

[FurryOnTheInside]

I case hardened a bearing cup that was already hot from brazing on a sprocket, using sugar as the hardening compound. Read it somewhere that it works. I put on tons of sugar so I ate the chunks of caramel/burnt sugar that resulted

I probly should've let the brazed part cool and normalize first, but I was just doing it cuz it was already hot.

That (bearing races/cups) would be the usual use of case hardening on a HT from what I've read, and is where I heard about it first. I never read about the sugar though.. that's interesting. Though I don't completely believe it haha I'll do some goggling and check it out. Thanks for the tip.

 

[keatonx]

People here on the interwebs have used bone meal, charcoal, joy dish soap, tallow etc. as carbon sources for case hardening