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Post by bambuko on Nov 11, 2015 21:36:03 GMT
I am after one of these (specifically Pratt Burnerd with backplate fitting, not integral Myford thread) and while I am looking at epay I am also tempted by the Indian knock off offered by Arc Euro (Zither brand).
Has anybody got any experience of these Indian chucks? or should I wait patiently for the original?
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SteveW
Elder Statesman
Posts: 1,397
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Post by SteveW on Nov 11, 2015 23:21:06 GMT
I bought a four jaw from ArcEuro a while back and it was/is more than good enough. The hardest bit being adding a back plate but then it hasn't got to be exceptionally well centred other than needing to balance.
Getting a "lighteight" and "a six inch" in the same package is going to be a stretch. Think mine was either a 4 or 5 inch and it's not really light.
The nice thing about the (old) Myford four jaw is that it is relatively light for its size and has a minimal over hang. The more conventional 4-jaw plus back plate will be a far bigger lump, especially at 6" diameter.
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Post by bambuko on Nov 11, 2015 23:40:07 GMT
Yes, that's why I am after "slim body".
6" is quoted at around 4.5kg (which is about the same weight typically, as 5" independent 4 jaw).
The one I am talking about is exact copy of the original/old Myford 4 jaw, but made in India by Zither.
So, the one you bought - was it Chinese or Indian?
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SteveW
Elder Statesman
Posts: 1,397
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Post by SteveW on Nov 11, 2015 23:54:36 GMT
Just checked the ArcEuro site. Those slim chucks weren't available when I bought mine. The certainly look better than the chunky thing I've got. In fact, one of those front fixing chucks would have solved my question on fixing a chuck on my turn-table of the same size.
The short answer is now: "No I haven't experienced these chucks but I wish I'd seen them earlier".
I think my chuck was from either Poland or Eastern European. Would imagine that ArcEuro know their stuff at least as much as any of the UK tool sources so would expect the India chucks to be more than good enough.
I've always wanted a bigger 3-Jaw for my Myford but always worried about the extra weight on the Myford nose.
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Post by bambuko on Nov 12, 2015 0:15:13 GMT
I don't think Arc Euro ever did anything from Poland (Bison) or Eastern Europe (TOS) - if it was was it would be 3 to 4 times as much as what they are offering :-)
I have Chinese 4 jaw from one of UK model engineering suppliers and it is nowhere near as good as my other chucks.
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SteveW
Elder Statesman
Posts: 1,397
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Post by SteveW on Nov 12, 2015 0:38:43 GMT
Just went out there. Bambuko, you might be right. Turns out I've got two spare 3-jaw chucks. One is a Bison brand the other is more anonymous with faded red stamped wording providing the only clue other than an ArcEuro label and the price of 37 quid.
Perhaps I just need to go to bed now.
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Post by Jo on Nov 12, 2015 14:04:52 GMT
The steel that Indian chucks are made of are not to the same standard as that used in Bison/TOS/Prat so they have a limited life expectancy.
I picked up a "good as brand new" 4 jaw Pratt for my dividing head for £40 because it was fitted with Boxford back plate from one of the not so cheap second hand tool dealers.
Jo
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Post by bambuko on Nov 12, 2015 15:15:04 GMT
Indian chucks in the size we are talking about are made form ductile iron not steel afaik.
4306-160 from Bison (steel) sells new for about £450 (vat included) - that's 3 to 4 times as much the one from Zither India...
So I guess I will continue searching for "good as brand new" :-) although I guess Pratt is also made form iron? not steel?
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Post by Jo on Nov 12, 2015 15:34:08 GMT
Steel, Iron, Tungsten, Titanium the production standards for metals/materials in India are not the same as we work to and my/others experience has shown that they quickly wear out.
You will need a steel bodied chuck if you intend on using it over 3000rpm. (Does your lathe do this?)
I would visit a show or look at the second hand tool dealers. For instance Home and Workshop Machines currently have a back plate mounting one in stock at £90 (they have it listed under Myford which accounts for the high price ).
Jo
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