Knuckledragger
blowing chunks and grabbing porcelain
I have seen a few threads about this tool and have been recently approached about getting dimensions for the tool, since I have one. If it is worthy, it would be an honor to have this thread moved to the tech section or parts box.
If you want to order one, it is OTC part number 303-D045. Both parts are stamped with the number and have /1 (the drift) or /2 (the holder) also, in case you lose one or the other, I guess. Be patient. I ordered one in early 2010 and it took 6 weeks for them to get it to me. I think they make them in batches and there really isn't much demand. It cost $130 then.
But for the rest of us, it is simple and easy to make one. I thought there would be some secret handshake or witworth threads to make, but it is pretty straight forward.
The holder (the part you hold) is a 1 1/2 inch diameter tube, cut 5 inches long with a 1 inch diameter hole in the middle. The business end (that seats against the plug) has a 5 degree chamfer that approximately matches the crown on the freeze plugs. there is a 1/16 inch flat ring around the chamfer, probably to keep the edge of the chamfer from being beaten up with use or storage. Also on the business end, the outside diameter is cut undersize about 1/32 inch, so it doesn't jam in the 1 1/2 inch diameter hole in the block.
The drift (the part you hit with the hammer) is made from some 1 1/2 diameter solid round stock. It is only .005 shorter than the hole in which it rides. It is .992 diameter, so a slightly sloppy fit is no problem. No need for honing. I was surprised to find the length so close, I thought it would have been much shorter. Learn something new every day. the striking head is about 1 inch thick, but make it any size you want.
The important part is to have a good flat surface on the bottom of the striking head and the top of the holder. That way you know when you have pounded the plug enough by feel.
If you want to order one, it is OTC part number 303-D045. Both parts are stamped with the number and have /1 (the drift) or /2 (the holder) also, in case you lose one or the other, I guess. Be patient. I ordered one in early 2010 and it took 6 weeks for them to get it to me. I think they make them in batches and there really isn't much demand. It cost $130 then.
But for the rest of us, it is simple and easy to make one. I thought there would be some secret handshake or witworth threads to make, but it is pretty straight forward.
The holder (the part you hold) is a 1 1/2 inch diameter tube, cut 5 inches long with a 1 inch diameter hole in the middle. The business end (that seats against the plug) has a 5 degree chamfer that approximately matches the crown on the freeze plugs. there is a 1/16 inch flat ring around the chamfer, probably to keep the edge of the chamfer from being beaten up with use or storage. Also on the business end, the outside diameter is cut undersize about 1/32 inch, so it doesn't jam in the 1 1/2 inch diameter hole in the block.
The drift (the part you hit with the hammer) is made from some 1 1/2 diameter solid round stock. It is only .005 shorter than the hole in which it rides. It is .992 diameter, so a slightly sloppy fit is no problem. No need for honing. I was surprised to find the length so close, I thought it would have been much shorter. Learn something new every day. the striking head is about 1 inch thick, but make it any size you want.
The important part is to have a good flat surface on the bottom of the striking head and the top of the holder. That way you know when you have pounded the plug enough by feel.
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