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Blackhawk T15 1/2" Drive Crank Speeder Repair

pendragon1998

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Mar 24, 2012
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I posted the first part of this in the Vintage Blackhawk thread, but I wanted to just go ahead and give this its own thread.

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1928 Janney Semple Hill & Co advertisement

I was at an antique store a few months ago and saw this Blackhawk T15 crank speeder in a basket of old wrenches. It was pretty rusty and I liked it, but I passed that day. A few months went by, and I kept thinking about it from time to time, so I went back to see if it was still there. It was, so $5 later, and 90 years and 5 days after its patent date of Feb 23, 1926, I brought it home with me.

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After an electrolysis bath, a scotch-brite scrub down, and some paste wax.

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Blackhawk Made in U.S.A. T15

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Patented Feb 23, 1926

Unfortunately, after I derusted it, I discovered that the ball detent was non-functional. After some consideration, I decided the spring that was behind the ball was broken. The part was originally drilled, a spring was dropped in, the ball was dropped in, and the hole was swaged shut. This was a no-maintenance part. Eventually, the spring either rusted apart or broke from stress. Either way, the ball bearing would push down and wouldn't push out again, so the tool would not hold a socket and was therefore, more or less unusable.

I decided to fix it. I drilled a #3 hole into the back of the drive square, entering the base of the cylinder that houses the spring. Then I used a pick, some needle nose pliers, and finally a magnet to pull out all the broken pieces of spring. The ball bearing is too large to come out the #3 hole, so it remained trapped inside.

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Difficult to see, but the pieces of the rusted, broken spring are in the hole I drilled.

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Starting to pull out bits of spring. It broke several times, but I got it out in pieces.

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Easy does it...
 

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pendragon1998

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After I cleared out the broken pieces of spring, I threaded the hole to 1/4-28 with a Kromedge tap and an old Morse tap wrench.


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I marked the depth on a 1/4-28 machine screw that I temporarily installed. I cut a piece of compression spring of appropriate size to fit in the threaded hole.

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I cut the screw to length, leaving it about 1/16 proud. I cut a slot into the screw so I could use a small screwdriver to install it.

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I take pleasure in using old tools, such as this small wooden-handled screwdriver that I used to install the plug. Note that it's still a little proud of the surface.

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Some quick file work, and the new screw is flush to the surface and won't interfere with a socket. I purposefully put the slot deep enough to remain after filing, so that if I want to replace the spring in the future (or my grandkids do) it will be easy enough. I may locktite it in, but for now, it's not going anywhere.

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Ball detent is now working properly.


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And now, the tool holds a socket on just fine, returning it to service in my garage.
 

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pendragon1998

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NE Georgia
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Here's my restored cast iron file handle. I used all made in the USA tools for this repair (and mostly vintage and antique tools).
 

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twertsy

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Jan 5, 2014
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Reedville, VA
I'm not a fan of modding these old tools but since you're going to actually use that speeder handle, why not fix it! Nice job on the fix and may it be used by your grandkids some day!
 

tym

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Mar 5, 2016
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Location
MA
Nice! On the contrary, I see this as more repair than mod...great to see these old tools given a new lease on life!
 
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