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| Tapping -- How to's and How not to's.... |
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| sparky961:
--- Quote from: Mike E. on May 25, 2017, 05:26:40 AM --- --- Quote from: sparky961 on May 24, 2017, 04:12:41 PM ---What's the logic in this? Maybe it stays liquid in a really small hole but for any "normal" size it will have evaporated long before having the chance to be helpful. ............... --- End quote --- Have you have tried it ? --- End quote --- Don't need to. There are enough chemicals I inhale that are "necessary" to cause me to avoid using them unnecessarily. |
| Mike E.:
Ok, fair enough. |
| ieezitin:
Roll form taps.. do a great job the pilot size's are different but are available on the net.... you need a little more power to form your thread but break less if not at all.. most people don't know about roll-form taps which means e-bay sellers sell them cheap. do your own research they are great. Anthony. |
| Lew_Merrick_PE:
Here's a paper I put together on sizing pilot holes for tapping. |
| howsitwork?:
cheers for the paper to read :thumbup: I must admit trying roll form taps for aluminium and they work well but I was very concerned about the force I had to use at first. They do seem significantly stronger though. Count me in for spiral taps, oh the joy of watching the swarf come out ! Cost a bit more but much more satisfying to use especially in the smaller metric sizes. Not got any imperial ones yet..... I stick to paraffin mixed with neat cutting oil but have also found WD40 works well for ali. Anyone tried milk - seriously one guy I know swears by it! :Doh: |
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