Parts Wanted K-21 Collet

[Jarcaines]

I have been trying (unsuccessfully) for several months to get a collet for the K-21 with a square drive (preferred) or 3/16” insert. I was directed to Speedmaster but every time I ask about them I am told they aren’t in stock and I can’t get a timeframe for when they will be.

The thread pattern on the crank is an odd 1/4-32. Does anyone else make or sell a collet like this? Does anyone have one they could spare?

 

[ALLAN YUEN]

I have been trying (unsuccessfully) for several months to get a collet for the K-21 with a square drive (preferred) or 3/16” insert. I was directed to Speedmaster but every time I ask about them I am told they aren’t in stock and I can’t get a timeframe for when they will be.

The thread pattern on the crank is an odd 1/4-32. Does anyone else make or sell a collet like this? Does anyone have one they could spare?

You buy tap M6x 0.80 thread through Amazon Can you repair on old collet 1/4-28 and turn slow tap through

 

[NITROSNIFER]

I modified Allen's to accept a 3/16 shaft. If the thread is in fact 1/4 32 tpi that is the same as a standard glow plug. You are looking for a square drive for 3/16 shaft?? I have some square drive collet. IO just need to make sure the TPI is 1/4 32. Once I have that info I will see if I can make one up for you.

 

[Jarcaines]

That would be awesome, thank you!

Harry at Speedmaster told me 1/4-32. Can @Al Hobbs confirm?

 

[NITROSNIFER]

Al got back to me and it is 1/4 32. Let me see if I can get one made up this weekend.

 

[Jarcaines]

You’re a life saver.

 

[NITROSNIFER]

Can you measure the ID of the area where the collet fits into the flywheel so I can make a proper recess on the collet. I am just about done.

 

[Buckshot]

That would be awesome, thank you!

Harry at Speedmaster told me 1/4-32. Can @Al Hobbs confirm?

Confirmed

 

[Timbo Whalen]

I have been trying (unsuccessfully) for several months to get a collet for the K-21 with a square drive (preferred) or 3/16” insert. I was directed to Speedmaster but every time I ask about them I am told they aren’t in stock and I can’t get a timeframe for when they will be.

The thread pattern on the crank is an odd 1/4-32. Does anyone else make or sell a collet like this? Does anyone have one they could spare?

Harry is down a critical man in the shop presently. Some items, carburetors in particular, are backed up at least a month.

 

[Jarcaines]

Can you measure the ID of the area where the collet fits into the flywheel so I can make a proper recess on the collet. I am just about done.

@NITROSNIFER It’s 11/32”

 

[NITROSNIFER]

Need your address and I'll get it off to the post today

 

[DougSick]

I had same issue a and digging through my collet collection found a smooth bore collet for an electric motor. Just need to drill out in the lathe and tap for 1/4 32. OSE has collets for electric.