Flywheel threads

[papa_smurf49319]

need to repair the puller threads for my flywheel. Wondering if anyone knows the thread pitch and size. Also may make a few pullers.

Edited September 23, 2009 by papa_smurf49319

[blowit]

need to repair the puller threads for my flywheel. Wondering if anyone knows the thread pitch and size. Also may make a few pullers.

 

 

Seems to be a 27x1.00

 

Rare bird...

[racer]

That pitch may be correct, but they are also reverse cut.

[papa_smurf49319]

yup sure is, i was waiting for someone to say that. Dads a cnc machinist so i hope he will have access to the tap and maybe a die for makeing a few pullers, not that there not already cheap enough.

[racer]

I doubt he will have that tap or die. It doesn't seem like a very popular pitch, other than in motorcycles of course. It will probably have to be single pointed. No big deal, especially for a CNC.

[blowit]

Agreed, the single point cut will produce a better thread on that fine pitch and we rarely use a "die" for OD threads in a lathe. Just no reason for it.

 

I am still a little baffled why one would go through the hassle of fixing or making a puller when they cost 13 bucks!! I am a CNC shop owner and know the tooling and programming time alone would cost a few hundred just for the threading. Time is always worth something.

 

 

Now repairing the threads in the flywheel, if it is stripped, I would probably tack weld the puller on, get it off, and replace it. Still cheaper than trying to repair the threads. Reason is once the threads are gone, you must bore and thread to a new size which will not be the puller size.

 

 

B

[papa_smurf49319]

I dont know, my dad just said that making those pullers would be easy and hed give it a try. I dont know what single pointing is but im sure he will. Really tight on cash right now and dont wanna have to buy a new flywheel. Crank broke after an hour and now im rebuildin her again.

[blowit]

I dont know, my dad just said that making those pullers would be easy and hed give it a try. I dont know what single pointing is but im sure he will. Really tight on cash right now and dont wanna have to buy a new flywheel. Crank broke after an hour and now im rebuildin her again.

 

 

 

Again, a broke puller and stripped flywheel make good companions for welding. You can do this several times if you are careful and actually reuse the flywheel. You dad must have some free time to mess with it. Let us know how it works out.

[papa_smurf49319]

how durabul are these flywheels, does using a three jaw puller hurt them, cause i tried like hell to get that son of a bitch off there.

[quikshee]

A 3 jaw puller will probably mess something up, better off getting a new one or like previously stated a few tack welds and bam you got it.

[XxMeltIcexX]

Never use anything other than a flywheel puller, three prong WILL ruin that flywheel.

 

 

[Bansh-eman]

check McMaster. They probly have a tap for that for cheap. I was looking for a left hand tap for a tierod back in the day. everywhere else wanted 85 nucks for it. McMaster wanted 13

[Bansh-eman]

check McMaster. They probly have a tap for that for cheap. I was looking for a left hand tap for a tierod back in the day. everywhere else wanted 85 bucks for it. McMaster wanted 13

[blowit]

3 jaw will deflect the flywheel since it is made of a very ductile material and usually crack the internal magnets, thus the flywheel not only looses balance, it will not create a mag field correctly. I have known a few to reuse after a 3 jaw but doubt I would do it, even on my own. If harmonics are not suppressed correctly, they translate into the crank bearings and do more damage.

 

 

 

B

[blowit]

check McMaster. They probly have a tap for that for cheap. I was looking for a left hand tap for a tierod back in the day. everywhere else wanted 85 bucks for it. McMaster wanted 13

 

 

 

A LH 27x1.00 ?? dunno about that but I think he will need some material back before trying to tap that thing..