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Drill holes in hack saw blade

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Chuck in E. TN:
The reversed drill bit didn't seem to do anything. Maybe I didn't apply enough pressure. I'll try that trick again though. I ended up using a mapps gas torch to heat the blade peices in the vise and letting them cool in air. I still had to use a real sharp drill to make a hole. Used vise grips to clamp the blade pieces to a scrap of plywood and drilled away. The tool post shank of the centerfinder is 1/2" square tube. A  machine screw with star washers and a knurled cabnet knob hold the springs to the square tube. On the other end of the blade pieces I drilled 5/16" holes. I used a length of 1/8" rod with points filed on each end. For the pivot ball I used the metal center of a mouse ball. I chucked the ball and drilled  it first with a small center drill, then through with a 1/8" bit. I stuck a drill in the through hole and rechucked the ball 90° to the through hole and drilled again for a set screw. Slide the ball onto the 1/8 " rod and secure about 1" from one end. The rod goes through the big holes with the mouse ball between the holes.
To use the wiggler, mount to tool post with short nd of the rod toward the head stock. Place centers in headstock and tail stock. Adjust the rod of the wiggler to align the ends with the center points. place work in 4 jaw or mount to face plate, center by eye. Then place the short rnd of the rod in a center punch mark you wish to center for drilling/boring/etc.Rotating the chuck by hand, observe the right or long end of the wiggler rod. The farther the reference on the work is off center, the bigger circle the long end will scribe in reference to the center in the tail stock. Adjust the work piece as required untill the rod runs true again.Easy!

Chuck in E. TN

Chuck in E. TN:
I now realize since I annealed the blade pieces, their :bugeye: :bugeye: springiness is reduced. Guess I'll have to temper them again. This was a prototype/learning version anyway...
I will look for a wider hacksaw blade to make the next version from.
Also, the rod I used is too long to fit between the centers, oversight on my part, big time!  :bugeye: :lol:

Chuck in E. TN

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