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Here's a 10-minute tutorial on taps.
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I had a tap break off not long ago. I was able to get it unscrewed by using a small pick to rotate the tap.
Look very closely were the tap is broken. Look for an edge where the groove (that runs the length of the tap) in the tape exists. If you can get a pointed pick or punch on a bit of the groove, gently tap it around with a small hammer. It worked for me but I was sweating it for a while. |
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Spiral Point Taps
It is best to use spiral point taps. These have angled cutting edges at the tip which direct the chips forward into the hole rather than into the flute which leads to clogging and binding. I get mine from MSC. Boelube is a good lubricant for tapping. Carbon steel taps from the hardware store are OK in the larger sizes but the small ones are too easy to bind up and break!
Stewart Willoughby, 6 firewall forward. |
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It is true that technic plays a big part when tapping, but using this type of tap for the small sizes provides some extra safety margin. |
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