Gallery, Projects and General > How do I??
snapped centre drill
Jonny:
Even easier just break up the broken centre drill or what ever in the hole, works every time.
Blind holes can be more intricate certainly small items ie 7BA.
Arbalist:
Next time try using a spotting drill. :thumbup:
kayzed1:
I think i may have some spotting drills in some far away draw :doh: mind i did wonder what they were for when i got them some years ago. I will give the heat a try tomorrow while i await the Alum i ordered from Eblag..
Many thanks all. Ow! i forgot to say, i can not do photo's as my broadband is so slow, around the old dial up speed as i live in the back of beyond BUT. we are getting Fibre very soon, then you can look out it'll be pics every where. :thumbup:
Lyn.
Stilldrillin:
Lyn.
Centre drills, are for drilling holes, for centres.
Spotting drills, are for spotting drilling positions. Also, for leaving a chamfer, around the finished hole.......
David.
sparky961:
--- Quote from: Stilldrillin on December 06, 2015, 05:29:51 PM ---Lyn.
Centre drills, are for drilling holes, for centres.
Spotting drills, are for spotting drilling positions. Also, for leaving a chamfer, around the finished hole.......
David.
--- End quote ---
I've been baffled by how many professional experienced machinists are oblivious to this fact. I've even been told at the very beginning (while using a spotting drill) that I should use a center drill to start the hole.
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