2007-04-18 01:52:28 · 3 answers · asked by outboardfixer 1 in Science & Mathematics ➔ Engineering
I can only think of drilling into something threaded to avoid loosening in the process, or possibly some multi-spindle production machine where some revolve each way to simplify gearing (don't know if they ever existed).
2007-04-18 02:03:26 · update #1
If part of a single machine, multi-stage production requires the component to be turned anti-clockwise, any drilling operations are carried out with left handed drills to avoid having to stop and reverse the component's motion for this stage.
2007-04-18 02:04:03 · answer #1 · answered by Clive 6 · 2⤊ 0⤋
Yes they do exist and worth a lot of trouble if u break off a bolt . In the drilling process quite often it heats up a little and it will screw out . Works great even if they are expensive.
2007-04-18 10:06:13 · answer #2 · answered by JOHNNIE B 7 · 1⤊ 0⤋
There is no other reason to have left handed drill bits.~~
2007-04-18 08:57:00 · answer #3 · answered by burning brightly 7 · 0⤊ 1⤋