Hardinge Sjogren 5C Collet Chuck Question...
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  1. #1
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    Exclamation Hardinge Sjogren 5C Collet Chuck Question...

    I recently purchased a Hardince Sjogren 5C collet chuck. The threads that engage the collet appear to be so worn that I can just slide a collet full depth into the chuck. If I take the chuck off the machine and try the back end of the threads the collet engages properly. Obviously this is a problem. Anyone familar? Can it be fixed? Does anyone currently make parts for these chucks? Will the price give me a heart attack? Should I contact the seller and request a refund as the unit was listed as "good used" condition?

  2. #2
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    The 5C Sjogren chucks are rare, so there are few used ones out there and probably no used 5C parts. Looking at the parts list, I see the center gear for the 5C is the same as the one for the 1J chucks, but No. 1 Sjogren chucks are also scarce. A new 5C center gear will probably cost more than you paid for the chuck. A refund makes sense unless you think you can repair the worn part, which is a hardened steel gear with a threaded center.

    http://www.hardingeus.com/usr/pdf/co...23_sjogren.pdf

    Larry

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    Didn't ATS workholding get the Sjogren line from Hardinge? They're still being made, last I checked.

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    ATS does currently make the Sjogren line. The center gear cannot be turned around, it is not a symmetrical fit so that's out. Cutting out the center and pressing in a threaded sleeve looks doable though for what I paid for this thing, because it is a very rare X model with a Hardinge taper nose, I feel a bit ripped. The unit was listed as "Good Used" which I feel was not accurate.

    Hardinge Sjogren 5c Collet Nose w D1 3 Drive Hardinge Taper Nose OD | eBay

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    Packed it up and went though the return process, sending it back to the seller.

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    Well, not quite sent back, seller thinks the item is perfect, though it is obvious he doesn't know how it works, only that "It looked fine when I shipped it". Got a quote from ATS, a new center gear is $215, not bad considering. I have passed the info onto the seller and we will see how he wants to handle it.

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    I have repaired the 5c threads in collet closers by building up the worn threads with welding and rethreading them. I used one of them for years with no problems.
    jimsehr
    Last edited by jims; 10-10-2013 at 10:17 PM. Reason: more info

  8. #8
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    Well that sure is an option, but I still need to get some satisfaction from the seller as I purchase an item in "good used" shape and it sure isn't. Did the welding harden the metal? I would be afraid of not being able to cut the thread after welding.

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    I went to a welder I trusted and told him what I needed and that I had to machine part when it was done. But I have heard that the seller you got it from was a good guy. So I hope he will make it right with you. Good luck let us know how it turns out.
    jimsehr

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    Are these center gears "standard" the where you can use one out of a less desirable Hardince Sjogren 5C collet chuck?

    Tom

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    The seller is a stand up guy, told me to order the replacement part and he would handle the refund. Very likely I will do business with the guy again.

  12. Likes Rob F. liked this post

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