Author Topic: Tapping -- How to's and How not to's....  (Read 12943 times)

Offline sparky961

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Re: Tapping -- How to's and How not to's....
« Reply #25 on: May 25, 2017, 06:56:43 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. ...............

Have you have tried it ?

Don't need to.  There are enough chemicals I inhale that are "necessary" to cause me to avoid using them unnecessarily.

Offline Mike E.

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Re: Tapping -- How to's and How not to's....
« Reply #26 on: May 26, 2017, 08:23:08 AM »
Ok, fair enough.

Mike

California & Wales  - Home, & Home Away

Offline ieezitin

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Re: Tapping -- How to's and How not to's....
« Reply #27 on: May 26, 2017, 07:35:47 PM »
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. 
If you cant fix it, get another hobby.

Offline Lew_Merrick_PE

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Re: Tapping -- How to's and How not to's....
« Reply #28 on: May 26, 2017, 10:05:07 PM »
Here's a paper I put together on sizing pilot holes for tapping.

Offline howsitwork?

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Re: Tapping -- How to's and How not to's....
« Reply #29 on: May 29, 2017, 05:48:10 PM »
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: