Bummer! Got my chuck today and its stuck

hman said:
Wild hair of an idea:

The pinion looks like it has a pretty narrow OD where the chuck key sockets in - weak enough that it cracked under stress. You might consider turning a ring to fit around the OD of the pinion, maybe 3/8" long, and with a nice, hefty OD. Braze it on, and it should strengthen the pinion in the stressed area. Then assemble just the front and back of the chuck and bore the hole to the appropriate OD and depth for the modified pinion.
Click to expand...

I like that idea, too. I could press it on which would close the crack as well as reinforcing it for future use. I bored the back of the chuck to fit (55mm x 3mm deep) but still need to drill and tap for 3 mounting holes. Thanks for the great suggestion! I'll look into what kind of clearance I have for opening the reinforced pinion hole...
Here's the chuck back, bored and tapped (6mm)
chuck10.JPG

chuck10.JPG
 
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Sorry Dale, I just cant help myself on this one. Does that mean stuck like chuck or chuck likes stuck? Hmmmmm, inquiring minds want to know....

Bob
 
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