3/4"Crank fixture for drilling and tapping

[Triley41395]

Looking for a fixture/fixtures to drill and tap a 3/4" crank. Can't seem to locate one for sale online.

 

[minibikefever]

I have one I think it came from McMaster-Carr but I'm not 100% on that I will check to see if I can see where I got it?

 

[Skipp]

I use two clamp collars and a drill bushings to guide my way…very simple…then get you a 3/8x24 tap…or 5/16 if you wish….

 

[cfh]

Get a 1/4" drill bushing from McMaster Car part #8493a074. Use an old clutch as a guide, then you can drill the PTO using the drill bushing. Tap it for 5/16-24. Since the crank is cast iron, it drills pretty easy.
http://www.pinrepair.com/minibikes/p/snowblow53.jpg
http://www.pinrepair.com/minibikes/p/snowblow54.jpg

 

[Skipp]

Ok I searched for months on this topic, asked and no one knew…so I asked the old machinist at work …he said this is what he’d do…so I had him cut a drill bushing a little long…put it in a clamp collar, clamp a second collar on the shaft and the remaining bushing…drill 1/4”…then I put in the Q bushing and drill it for 3/8x24….some like 5/16….matter of choice….I like the collars because they give me something to grab on if the shaft starts to spin…
Just another way….

 

[Triley41395]

Heck yeah, both look like great ideas and I can easily do both. Thank you guys, problem solved.