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Thread: Wohlhaupter UPA5-S6
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15th September 2013, 03:53 PM #1
Wohlhaupter UPA5-S6
Hi all,
I have finally gotten around to re-assembling my boring head but i have a few problems....
Firstly, despite the fact i took photo's of the break down i have some parts left over.....A compression spring 1/2" long by 3/16" dia, and a brass slug 6mm long by 5mm dia. I cant seem to work out where they go. The one that pushes the star gear shaft (the one that the auto feed pins engage on) is there, so its not that one.
The other is i think i am missing a small spring. It goes in the removable end of the leadscrew, and pushes on the slug that locks the screw in place, the one the ball bearings push out of the way when you put the allan key in.
Has anyone else pulled a UPA4+ (i think the 1-2-3's where made differently) apart and has pics, or a parts breakdown?
Cheers,
Ew1915 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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15th September 2013 03:53 PM # ADSGoogle Adsense Advertisement
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15th September 2013, 11:25 PM #2
Thanks Michael for sending me some literature, unfortunately it doesn't really help me, there is a parts breakdown but for a UPA3.
Anyway, here she is, decked out with a 42mm endmill holder. Yes, i did the unthinkable and machined down the MT5 shank. Mostly because there would be no easy way to get a drawbar into the head itself, MT5 being M20 and the NT40 being 16mm. That and i lost about 100mm of Z with the adapter. Not a problem for using it vertical but it would mean big problems for horizontal use.
The other pic is my left overs......
Cheers,
Ew1915 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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17th September 2013, 08:03 PM #3Senior Member
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See if you can get the facing feed to work.
if it doesn't it probably is the feed screw lock pin and spring.
Good luck.
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17th September 2013, 09:17 PM #4
Thanks Clubman,
The feed screw locking spring is the one i'm missing.....It all seems to work fine, all 12 feed pins engage and disengage fine, it feeds fine. Beats me where the spring and pin belongs....
Ew1915 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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24th September 2013, 10:56 AM #5Senior Member
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G'day Ewan, I was given a UPA-4 with a Deckel taper which is useless to me and have considered machining it down to 1" straight shank. I'd be curious to know how you went about machining the shank on your head and if it was particularly difficult? I've had this head just sitting there for about 18 months and it would have been really handy on a few occasions so with you as inspiration I reckon I'll bite the bullet and get it done. I've got some Wolhaupter manuals at home I can send you though they are all from the web so you might have them already. I figure I''ll need to strip mine to machine the shank so I can do this too if it helps. Cheers, Greg.
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25th September 2013, 01:24 AM #6
Hi Greg,
I machined the shank in the 4 jaw with a live center in the outer end. I still had it in bits so it was just the shank/top half of the head. I spent a fairly long time making sure the TIR was better than .001" at either end and then machined it off. It was as hard as all get out, but with small DOC's and carbid i got it done fine. The hardening stopped about 1/2" from the shoulder. I didn't take much off mine, i used a 42mm endmill holder, which meant the machining started at pretty much nothing. One the machining was dome i cut it top length.
If you do pull yours right down i'd love to know where the extra's i have go....
Between my searching and Michael i think i have all the manuals that are out there.
Cheers,
Ew1915 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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