Gallery, Projects and General > How do I??
Camlock chucks
AdeV:
It has a unique to the Edgwick nose - basically, a flat disc with 3 holes for mounting bolts to pass through, spannered up from behind. The chuck registers on the spindle, but there's no taper, so it relies on having pretty close to zero runout on the mounting flange.
There's a picture of it in the first post of this thread: http://madmodder.net/index.php/topic,12279.0.html Not a very informative picture though! I'll try to get a better pic later in the week.
My only concern with making a camlock nose is the stickout - I'll need to be able to remove it if i ever want to use the gap in the bed, for example; not that I've ever needed to yet...
DMIOM:
--- Quote from: AdeV on October 31, 2017, 04:18:54 AM ---.. I think I'd be making a size 5 nose....
--- End quote ---
Ade,
I'd commend D1-* style for repeatability - my Chester lathe has a D1-5 spindle and I have a number of native D1-5 three and four jaw chucks, faceplates, dog-drive plates etc.; and several others (ER32, Jacobs rubberflex collet chucks, and a 6-jaw self-centring) that I've mounted to D1-5 backplates.
Should you progress with this in D1-5 form, and were running them on your CNC mill and new lathe, I'd be interested in one or two D1-5 receivers or 'noses' with a suitable flange or back mounting, so I can use them for ease of transfer of chuck-mounted work from lathe to rotary table or 4th axis on the mill.
Dave
AdeV:
Hi Dave,
If I can make one to the required tolerances, I'd be happy to make some more, no problem :thumbup:
How many pins does the D1-5 have? If I'm reading the diagram right, it's 6 pins, is that what yours have?
djc:
--- Quote from: AdeV ---I don't mind drilling some clearance holes in the Edgwick spindle flange to allow the camlock pins to come through the back of the backplate/mounting flange
--- End quote ---
If the pins poke through the existing flange, how will the cams lock onto them? Whatever you do will have to be almost entirely in front of the existing flange.
You have been pointed to the camlock specification. Draw up the pin and the cam in their proper relationship. Decide how minimal an amount of metal you can live with around the cam (the bit with the square hole in it). That amount will set the centreline of the cam relative to the face of the existing flange.
--- Quote from: AdeV ---How many pins does the D1-5 have?
--- End quote ---
You do not have to use all six pins. Three out of six would suffice.
--- Quote from: AdeV ---I need some more tooling & in particular some of those rather excellent "ultra sharp" inserts that Chronos/Glanze do.
--- End quote ---
Glanze inserts are not the best quality (toolholders themselves are good). The ones cutwel sell are branded and much better.
Have you considered finding a lathe with the appropriate spindle nose that someone is breaking and buying the spindle off them? All the work is done for you. I wanted to make a D1-3 adaptor for my rotary table and that's the route I went - buy a complete spindle and chop off the bit you don't need.
Before you settle on a final design, have a look at the chucks. Like with mill tooling, 40 taper is more common than 30 taper and thus is cheaper. I do not know how the prices of D1-4, D1-5 and D1-6 compare.
RotarySMP:
If you already have a flange, what advantage are you lookig for with Camlock? Not fiddling with mount screws save a little time, but given a flange, you already have the FWD/REV safety aspect covered. If your flange is round and flat, then tight fitting chuck backplates should already remount with high reapeatablity.
The Camlock standard has such tight tolerances as it is designed for the chucks to contact both on the taper and similtaneously on the flange.
Ideally, the camlock spindle adapter should be hardened, and then ground. The clearance at the back of the camlock taper is to provide the run out space for the grinder wheel to run out into. This is why you can't measure this dimension directly. Even if you use a sharp tool without a nose radius, and dont have the undercuts, you are not likely to get repeatable measurements on the back end of that taper to within 8 microns.
Whether an unhardened, unground approximation of the camlock spindle will give significant benefit over the standard nose flange is debatable.
Mark
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