idosubaru Posted December 4, 2017 Share Posted December 4, 2017 Google was flooded with machinists work, etc. When tapping a hole that's deeper than the length of a tap - you need whatever is holding the tap to be smaller than the diameter of the hole you're tapping so it can go down into the hole and reach the threads. Some tap sockets do not appear to be small enough to do that.... Link to comment Share on other sites More sharing options...
naru Posted December 4, 2017 Share Posted December 4, 2017 You buy a longer tap. http://www.ebay.com.au/itm/M2-to-M14-Long-Extended-Shank-Metric-HSS-Right-Hand-Thread-Tap-select-size-/282113420352 Link to comment Share on other sites More sharing options...
idosubaru Posted December 4, 2017 Author Share Posted December 4, 2017 Hmmm. Have you ever used adapters? An adapter would allow length variations for cramped quarters. Kind of like sockets - having one or two socket lengths would be limiting. I’m usually only chasing threads not making new ones, maybe the answer is more along the lines of making a bolt into a chaser so I’m not limited to taps? Link to comment Share on other sites More sharing options...
Gloyale Posted December 6, 2017 Share Posted December 6, 2017 weld the tap onto the end of a bolt. 1 Link to comment Share on other sites More sharing options...
idosubaru Posted December 6, 2017 Author Share Posted December 6, 2017 (edited) weld the tap onto the end of a bolt. what the crack - i would have guessed you can't weld that but for no good reason, i've never considered what they're made of. that is the elegant solution I was hoping for if you're not pulling my leg! Edited December 6, 2017 by idosubaru Link to comment Share on other sites More sharing options...
matt167 Posted December 8, 2017 Share Posted December 8, 2017 cool the tap cutters with a cold wet rag though. If you get it too hot the metallurgy will change and then the tap will actually twist. If it's a cheap tap it might do that anyway... You should be able to mig it solid enough without getting it too hot Link to comment Share on other sites More sharing options...
czny Posted December 8, 2017 Share Posted December 8, 2017 Google was flooded with machinists work, etc. When tapping a hole that's deeper than the length of a tap - you need whatever is holding the tap to be smaller than the diameter of the hole you're tapping so it can go down into the hole and reach the threads. Some tap sockets do not appear to be small enough to do that.... A pulley tap has a reduced shank just for that purpose. https://www.mcmaster.com/#pulley-taps/=1alewv7 Link to comment Share on other sites More sharing options...
idosubaru Posted December 8, 2017 Author Share Posted December 8, 2017 A pulley tap has a reduced shank just for that purpose. https://www.mcmaster.com/#pulley-taps/=1alewv7 got it. good to know if it's one i think i'll use again. in general i'll need this to chase threads, nothing crazy. i'm in a rural area/state and often can't get stuff like this easily. and something like this is likely to be a one-off tool, so i'd rather use the taps i have. Link to comment Share on other sites More sharing options...
Fairtax4me Posted December 9, 2017 Share Posted December 9, 2017 Tap extensions http://www.waltontools.com/products/stylea.htm Can also often use 3/8 or 1/4 socket extensions and if the end is too wide just narrow it down with the bench grinder. Link to comment Share on other sites More sharing options...
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