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  1. #1
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    Default Slim Lathe chucks

    Hi Guys,
    Does anyone know of a source of slim lathe chucks? All the standard 6" 3 jaws and 8" 4 jaws are around 3"+ thick, and i want at least a new 4 jaw for the C10 that will not take up so much Z or add as much momentum for the brake to overcome. 6" 4 jaw Pratts are available 2nd hand due to their use on the Hercus lathes, but i can't find anything bigger.
    There is this 8" 4 jaw on ebay USA that is Italian made, from looking i think REM are a USA company that brands imported stuff.
    http://www.ebay.com.au/itm/290717973...84.m1423.l2649

    Cheers,
    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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  3. #2
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    Default

    I have an 8" Cushman (US brand) which is only 2" thick. Might be worth having a look at them (I've never had any problems with them)
    Joe at Plaza machinery ([email protected]) is quite helpful and if you explain what you want he may go measure some stock for you.

    Michael

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    RDG list a slimline 150 4J, 50mm thick: http://www.rdgtools.co.uk/cgi-bin/sh...32.html#SID=71.

    PS: That REM was discussed on PM. Consensus seemed to be chuck probably good, seller not so much.

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    Ew, depending on what spindle nose your lathe has, you may be able to buy a normal chuck but with integral mount. Integral mount means that the chuck needs no backplate, thus less weight, less inertia, and less z overhang. But they only make integral mount chucks for the most common spindle noses, usually camlock. Also, integral mount chucks always cost more than an universal mount chuck, even if you factor in the cost for a backplate needed to mount an universal chuck.

    The ebay link you provided shows an integral mount chuck. But I would be very wary, it looks not very much Italian made to me. There is a round recess on the face for the maker's logo plate... but it is empty. An Italian maker would be proud to put his name there. The whole chuck looks to me rather cheaply made, like there might have once been a Chinese or Indian logo glued into into that recess. Mind you, it does not say made in Italy, it only says imported from Italy, and that may well be true, many things sold in Italy are made in China.... buyer beware.

    If you cannot get an integral mount chuck, you may consider a low profile chuck. But low profile chucks invariably come at some sort of expense. Useful life may be reduced, because everything has to be low profile, body, thinner scroll, shorter jaws. This results in smaller bearing surfaces for the jaws, smaller bearing surfaces jaw teeth to scroll.... resulting in more wear and less gripping force before things flex. It will probably also mean extra cost, because the body will have to be made of steel instead of cast iron, and because they sell far less low profile chucks than standard chucks.

  6. #5
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    Thanks guys,
    The C10 has a D1-4 nose, hence that link. I'm 99% certain that the older listing of that REM chuck had a close up of the "made in Italy" stamped onto the chuck. I do agree though that it does look like a cheap Chinese chuck.

    The standard chucks with integral mounts still seem to be pretty thick, the Gator chucks that H&f now sell 6" 3 jaw is 81mm for direct mount, 64mm for backplate. No real saving there at all. The 4 jaw is much better, there is hardly a difference in size.

    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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    I have P-B slim body 4 jaw chucks in 6", 8" (2 of) and 10" sizes so they are available. I picked up one of the 8" units off fleabay some years ago, the others I'd gotten with the lathe except for the 6" chuck which I got new old stock off the original purchaser, who'd never used it.

    That 6" chuck is the one I keep for jobs that require the best precision possible in a 4 jaw. It's spot-on and a beautiful bit of machinery. The 8" size is the most useful for general purpose work, the 10" I rarely use but it's handy for sort-of faceplate type work, just have to watch the jaw extension.

    All D1-3 for my Chipmaster, the 6" one originally a screwed nose unit I re-machined & fitted a D1-3 backplate to. This only added maybe 10mm to the overall length compared to an integral mount chuck so not significant IMO.

    PDW

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