Hardinge 3-jaw chuck required
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  1. #1
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    Default Hardinge 3-jaw chuck required

    Guys just recently taken delivery of a well looked after HLV, believed to be made in 52/53 going by its UK series number 0072.

    The lathe is in lovely condition as far as I can make out, time will tell I guess. I'm looking for a proper 3 jaw chuck for it with the special taper quick fit back plate to go with the 4 jaw it has already. Appreciate these are quite rare but know they are out there, not interested in a 5c collet type however.

    I'm in the Uk so anyone can help, or point me in the right direction I would be very appreciative.

    Marc

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    Your choices are Hardinge, Possibly Rotagrip or, what I did, get a bit of cast iron or steel stock, hold it in the 4-jaw, bore the nose taper in it, using a 10ths DTI to set the top-slide over to the correct angle. Drill and tap for the drive pin, then fit it on the spindle and turn he rest of it into a blackplate. Then fit the Bison/TOS/Bernerd(griptro, if wanted) of your choice to it.

    Takes a couple of hours, but that's not long.

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    A few years ago, a UK member here wrote that he got a Pratt Burnerd 6" Setrite 3-jaw for his HLV-H and bought the Hardinge 4 degree adapter plate from PB. He said the adapter had to be shipped from the American PB factory. It was rather expensive. I use 6" Setrite 3- and 6-jaw chucks and PB adapters on my old Hardinge lathes. I bought the chucks and adapters new decades ago. In my experience, the PB adapters are machined from steel and the Buck and Hardinge adapters are machined from cast iron. The Hardinge product is actually called a C25 taper fixture plate and has a plain 8-7/8 inch disc that has to be turned to fit the chuck and drilled and tapped. The disc is not really thick enough for mounting a Setrite chuck unless you fasten on a separate center spigot. The C24 taper fixture plate has a 5 inch disc. The Buck and PB adapters are ready to use after taking a thin skim cut on the mounting face.

    ShopHardinge - 59A0008750 Current price of the C25 $1230, so probably not a practical choice.
    ShopHardinge - 55A0008750 Current price of the C24 $630, still not a bargain.

    In the 1950's, Hardinge only sold 5" chucks for their lathes and continued to sell them for many years after. I think the 6" chucks were offered some time after 1960 with the introduction of the HLV-H.

    It seems very few options exist for buying new Hardinge 4 degree taper chuck adapters these days.

    Larry

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    Quote Originally Posted by marcsO View Post
    I'm looking for a proper 3 jaw chuck for it with the special taper quick fit back plate to go with the 4 jaw it has already. Appreciate these are quite rare but know they are out there, not interested in a 5c collet type however.
    You can make your own adapter. Courtesy of another member here, I think it came from bobw.

    tmp_24000-80mm-taper-mount533854468.jpg


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