Today I needed a 40mm hinge boring bit. Found it in the CSA catalogue and noticed the following:”Right handed tools rotate clockwise. Type: Right hand.”
Maybe I am ignorant but I have yet to comprehend the significance of the ‘handedness’ or rotation direction of a bit. But I do have a hunch.
Can someone enlighten me as to why these two statements appear in the description?
Thanks,
dlb
.
p.s. Of the 4 stores which I called, only one had the bit and none of them knew the answer to the question.
The undisciplined life is not worth examining.
Replies
The significance is a right handed bit will not cut if turned counterclockwise. Some machines that use multiple bits have a gear drive and turn adjacent bits in opposite directions. Another thing to watch for is many bits designed for hinge boring machines will not work in a three jaw chuck. If you are using a three jaw chuck you need a bit with a round shank or one with three flats. Many hinge boring bits have a single flat and will not grip properly in a three jaw chuck.
Hi dlb,
Over here (and in Europe) the direction of rotation of a drill is how it is viewed looking from the rear of the motor - so a conventional drill bit is right hand twist (ie: rotates clockwise when viewed from the rear of the motor)
It is also possible to buy LH rotation tools - I've got a LH slot morticer so the mortising bits are specialty tools as are the LH rotation drill (dowelling) bits.
Drills for hinge pockets and other system 32 componentry could be either direction as they're sold for use in CNC routers. The heads on these can rotate either way. This explains why the word of caution was on the boring bit.
Cheers,
eddie
Some machines take both right hand cutting and left hand cutting bits. I have a 13 hole drill press (for shelf pegs) it takes 6 lefts and 7 rights. This is because the drive system is linked together.
All,
Thanks for taking the time to reply. Now I know!
dlb
.
The undisciplined life is not worth examining.
This forum post is now archived. Commenting has been disabled