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Binding headstock quill
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I seem to have a Zamac version of the Unimat DB/Sl. It¡¯s non-magnetic and heavier than I think the aluminum version should be. I was given the unit and the squill was stiff when received, so much so that the return spring doesn¡¯t retract the quill ?even when the clamp screws are fully released. ?I¡¯ve tried lubrication to no avail so I suspect that a form of "metal creep¡± has occurred, possibly because the former owner left the quill clamp screws torqued down hard for some time. At any rate the binding makes the headstock useless for fine drilling. Any sugestions will be greatly appreciated.
Thanks, Bill |
¿ªÔÆÌåÓýI would suspect oxidized oil over ¡°metal creep¡± as the cause of your problem.? Did you try lubrication with a penetrating oil?? You need something with a solvent in it to dissolve or at least soften any hardened oil between the quill assembly and the headstock.? Once it is free, you will need to remove the quill and more thoroughly clean off the outside of the quill and inside of the headstock with some solvent.? ? Jerry F. ? From: [email protected] [mailto:[email protected]] On Behalf Of William Macy
Sent: Wednesday, March 18, 2020 12:01 PM To: [email protected] Subject: [Unimat] Binding headstock quill ? I seem to have a Zamac version of the Unimat DB/Sl. It¡¯s non-magnetic and heavier than I think the aluminum version should be. I was given the unit and the squill was stiff when received, so much so that the return spring doesn¡¯t retract the quill ?even when the clamp screws are fully released. ?I¡¯ve tried lubrication to no avail so I suspect that a form of "metal creep¡± has occurred, possibly because the former owner left the quill clamp screws torqued down hard for some time. At any rate the binding makes the headstock useless for fine drilling. Any sugestions will be greatly appreciated. |
¿ªÔÆÌåÓýThanks Jerry. I haven¡¯t tried that but the spindle quill itself seems quite clean. I don¡¯t remember if I checked the headstock bore when I disassembled the works for repainting. That¡¯s easy enough to do. Some Blast-It should do the trick to clean up any gunk. I¡¯m about to order a set of replacement headstock bearings from Doug Feistamel at Homestead. When they come it will be a good time to see what¡¯s what with the spindle and headstock.Regards, Bill |