Adding collar (upset) to existing shaft

[sprintcar]

Looking at putting a collar on a 9" diameter shaft to resist thrust bearing forces, rather than machine from a 12" bar - this would also be used to upgrade old shafts to the new design.
I'm thinking of using a tight interference fit (r6 range) with 3 equally spaced plug welds.
Comments? Anyone done this before? Any better suggestions?
Thanks! Keep the wheels on the ground
Bob
showshine@aol.com

 

[arto]

how about a split collar [like the Boston Gear shaft ones

http://www.bostongear.com/

, but bigger] located in a groove machined into the shaft to give you a shoulder to bear against? Size the ID/bolts to create your own shrink fit @ ass'y.

 

[sprintcar]

Thanks, but I'm trying to avoid grooving the shaft and the cost/problems associated with fasteners inside a bearing housing Keep the wheels on the ground
Bob
showshine@aol.com

 

[diamondjim]

Wheely Bob,
You might just want to add enough stock
to put a taper on the shaft to lock a collar
in position.

 

[GregLocock]

A taper lock or collet type solution, or a loctited press fit plain collar, sound much better than anything involving welds.
Cheers

Greg Locock

 

[TVP]

I agree with GregLocock that a mechanical assembly would be better than welding. Loctite makes some very good "retaining compounds" that are stronger and more appropriate for this application than the typical threadlocing compounds. I believe Loctite 680 (green) is the strongest stuff. You can obtain more information from their website:

http://www.loctite.com/pdf/retaining.pdf

 

[Hush]

How about something along the lines of a Browning pulley bushing. Alternatively, an eccentric locking hub similar to those used on bearings.

 

[sprintcar]

One of the key points is keeping the cost out of the assembly..
Looks like the interference fit w/ loctite might be a good compromise Keep the wheels on the ground
Bob
showshine@aol.com