Dowel drill Collars
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Commercial collars are generally bad, oversize so they fit on cheap oversize drill bits and they are too short so they don't bear against enough of the drill and so they fit at an angle usually.
For rough work, they do ok, but for important work I make my own from brass on the lathe. If you want to be super accurate you fit the collar to the drill and then face it on the lathe so it is perfectly perpendicular to the drill bit. It's a bit of a faff but on my special purpose carbide drills it's worth the effort as the drills last me for years.
For rough work, they do ok, but for important work I make my own from brass on the lathe. If you want to be super accurate you fit the collar to the drill and then face it on the lathe so it is perfectly perpendicular to the drill bit. It's a bit of a faff but on my special purpose carbide drills it's worth the effort as the drills last me for years.
AES
Established Member
To save yourself the small cost of buying those depth stop collars, which I find are generally not too clever, you could invest in a couple of worm drive hose clamps ("Jubilee Clips"). They will tighten quite well on to a range of drill sizes and be pretty good in the vertical to the drill axis. They can be used several times on several different drill dias, especially if you carefully bend the free end back out of the way a bit.
How accurate they are depends entirely on how careful you are measuring/fitting in the first place, but once that's done if you're careful & light handed as the drill breaks through you won't damage the face you're drilling down against to any great extent.
But Rorschach's right, if you want dead reliable and dead accurate and repeatability then you really need to make your own from suitable bar or thick-walled tube off cuts - brass is good but steel's OK too. You'll probably need only 2 or 3 for most dowelling uses and if you've got a lathe they're easy n quick to make.
How accurate they are depends entirely on how careful you are measuring/fitting in the first place, but once that's done if you're careful & light handed as the drill breaks through you won't damage the face you're drilling down against to any great extent.
But Rorschach's right, if you want dead reliable and dead accurate and repeatability then you really need to make your own from suitable bar or thick-walled tube off cuts - brass is good but steel's OK too. You'll probably need only 2 or 3 for most dowelling uses and if you've got a lathe they're easy n quick to make.
This might be a silly question - but is this done (Can it be done?) on a woodturning lathe, or do you also have a metal turning one?
TheTiddles
Established Member
A bit of copper pipe works too, stops on the drill chuck face
Aidan
Aidan
If you are really skilled on a wood lathe you probably could make them with brass or aluminium but really it's a job best done on a metal lathe (which I have).
AES
Established Member
Wot 'ee said (Rorschach) said. I haven't got a wood turning lathe so dunno, sorry.
woodwind
Established Member
My solution is to make long spacers from 12 or 15mm wooden dowel rod by drilling through the centre and cutting to the required length so as to produce a (say) 21mm hole for a 40mm x 8mm dowel. These can be pushed onto the bit and are stopped from riding up by fixing the collar to the solid part above the flute. (don't know what it's called)
Several of these can be produced for very little cost, clearly marked by just writing on them. Odd sizes as well, when perhaps joining differing sizes of stock requiring 15/25mm holes.
Several of these can be produced for very little cost, clearly marked by just writing on them. Odd sizes as well, when perhaps joining differing sizes of stock requiring 15/25mm holes.
These are very good
i have a couple of sets of these and they work...very well
https://www.rutlands.com/sp+drillin...ll-bit-depth-stops-2-piece-set-rutlands+r4132
i have a couple of sets of these and they work...very well
https://www.rutlands.com/sp+drillin...ll-bit-depth-stops-2-piece-set-rutlands+r4132
flh801978
They look the business....Ill keep them in mind.
Ive just ordered just before your post the Wolfcraft drill stops they have the split in the collar, which seem to clip round the drill and secure at the side rather than the center of the drill.
Thanks for the help
They look the business....Ill keep them in mind.
Ive just ordered just before your post the Wolfcraft drill stops they have the split in the collar, which seem to clip round the drill and secure at the side rather than the center of the drill.
Thanks for the help
I realise this is an old thread but I needed a new set for some doweling I need to do, so also bought these. They clamp very easily and clamp the whole drill as they don't use a set screw like my old ones did, so also clamp square. They are chunkier than the set screw type but hopefully more durable.
Attachments
MARK.B.
Established Member
Those look interesting Mike, can you post a link please
I bought a set and they are really good. They lock in place well too better than the screw locating on the drill flute.
MARK.B.
Established Member
Thank you
I use these, look very similar to the wolf craft design and excellent range of sizes.
https://www.wdscomponents.com/en-gb/split-shaft-collars-wds-650/c-787/p-1625
https://www.wdscomponents.com/en-gb/split-shaft-collars-wds-650/c-787/p-1625
