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Floor Jack Repair
A friend of mine broke the diecast universal joint in his Craftsman floor jack. He couldn't find a replacement universal so, in looking at the broke pieces, I figured it wouldn't be that hard to make a new one out of steel.
http://images61.fotki.com/v535/photo...MVC011F-vi.jpg
The pieces aren't that big. Only 3/4" in diameter. All of the parts after dis-assembly.
http://images54.fotki.com/v104/photo...MVC015F-vi.jpg
I found a piece of 3/4" diameter steel in the drop pile.
http://images16.fotki.com/v388/photo...MVC003F-vi.jpg
I cleaned up the OD in the lathe, faced off the ends and drilled out the bore's for the mating parts. Test fitting the parts.
http://images59.fotki.com/v111/photo...MVC005F-vi.jpg
Continued in next post.
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With that done I clamped the piece in the vise on the mill and machined off both sides.
http://images108.fotki.com/v613/phot...MVC008F-vi.jpg
http://images108.fotki.com/v360/phot...MVC009F-vi.jpg
With that done I picked up the ends and center drilled for the pin holes.
http://images59.fotki.com/v222/photo...MVC015F-vi.jpg
After drilling out the pin holes I flipped the part 90 degrees in the vise and hogged out the center portion with a 1/2" end mill.
http://images16.fotki.com/v3/photos/...MVC017F-vi.jpg
Continued in next post.
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Thanks astroracer! We've added your Floor Jack Universal Joint to our Jacks and Lifts category, as well as to your builder page: astroracer's Homemade Tools. Your receipt:
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<a href="http://www.homemadetools.net/homemade-floor-jack-universal-joint"><img src="https://www.homemadetools.net/uploads/236828/homemade-floor-jack-universal-joint.jpeg"
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<a href="http://www.homemadetools.net/homemade-floor-jack-universal-joint">Floor Jack Universal Joint</a>
<span> by <a href="/builder/astroracer_2">astroracer</a></span>
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<div class="tags">tags: <a href="http://www.homemadetools.net/tag/floor-jack">floor jack</a></div>
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Very nice job! I'm sure your friend was happy!
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That's about the size of a Proto u-joint for a ratchet wrench.