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bob ward
16th Feb 2015, 10:48 PM
I needed to rework something I’m making which meant I had to drill and tap (M8) half on half off an existing (6mm) hole. So the 6mm hole needed to be plugged very solidly. This is in 10mm mild flat.

I have taper pin reamers, so my solution was to taper ream the hole, turn a taper pin to suit and press it in.

Drilling and tapping across the plug was just like tapping virgin material.

One of those minor ‘might come in handy one day’ tips.

http://i237.photobucket.com/albums/ff28/sirrobertthegood/IMG_0055_zps3bbc10ee.jpg (http://s237.photobucket.com/user/sirrobertthegood/media/IMG_0055_zps3bbc10ee.jpg.html)

http://i237.photobucket.com/albums/ff28/sirrobertthegood/IMG_0060_zpsb34950aa.jpg (http://s237.photobucket.com/user/sirrobertthegood/media/IMG_0060_zpsb34950aa.jpg.html)

Ropetangler
16th Feb 2015, 11:09 PM
Great tip Bob, and if the bolt pulls from the small end of the taper, it will pull the pin in tighter, so no chance of it loosening over time with vibration etc.:2tsup: