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Thread: Hendey lathe

  1. #1
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    Default Hendey lathe

    Been working on the 1940 Hendey lathe, fitting a replacement modern 3 phase motor and a VFD . The new motor is a Hyundai brand ... 3hp it has a heavy flywheel on one end, apparently these are treadmill motors . Only 3 wires coming out, I found the star connection and rewired it in Delta ... Its been a painstaking job configuring the motor mount , there is a old broken 1/2" mounting bolt jammed in the heavy cast plate , I had to remove the plate in order to drill out the bolt, this entailed removing a long pin that the plate rotates on to tension the belts. getting there HA . The Hendey is a Metric version .. it was meant to go to France but the Germans took things over .. so the lathe was sent out here to GMH , the original manual has GMH stamps in it. Ive has this lathe for some years but have not used it ... so will be giving it a run soon. It came with some accessories .

  2. #2
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    Default

    Love some photos, is it the tie-bar model?

    Sent from my SM-G973F using Tapatalk

  3. #3
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    Default pics

    Quote Originally Posted by caskwarrior View Post
    Love some photos, is it the tie-bar model?

    Sent from my SM-G973F using Tapatalk
    Yes will post some pics tonight. I managed to remove the stuck broken bolt out of the motor base, the motor base is a very heavy lump of cast iron , I can just manage to drag it along the floor . No its a geared head model, 12 speed , it has a reversing lead screw with the single tooth clutch for doing threading jobs. I bought this Hendey in 2012 from ebay of all places , old quality lathes were cheaper back then for some reason. Being metric I think GMH had limited use for it, overall condition is good . Top speed with the original factory motor pulley ( and 60hz ? ) is 600 rpm but I'm fitting a larger diameter pulley , the headstock is marked TRB ( tapered bearings ) so it will handle the faster speed easily. Downside , is the threaded spindle, Oh well cant have everything I guess.

  4. #4
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    Default pics

    Pics of the general mess
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  5. #5
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    Default more

    The headstock has 3 oil sight windows, each end the spindle bearings run in their own oil reservoir with sight glass for oil levels . The Hendey agengts in Paris France badge
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  6. #6
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    Default Motor

    Got the new motor fitted , bad news is the VFD is giving me a error code meaning there is a short in the motor somewhere , Probably my crap wiring when I did the delta rewire. I got another smaller motor and wired it to the VFD and it ran Ok so the problem is in the lathe motor , have to remove it which is a pain.
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  7. #7
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    Default Motor

    I've pulled the motor out, the insulation checks out Ok with the Megger . Maybe the design of this motor is such that it doesnt like being rewired in DELTA ? I tried it with another VFD that drives my other motors with no problem, but this particular motor just displays a Ld error and the VFD shuts down . Might need to use another motor . I will go over my Delta connections but I'm positive I got it correct , I had the diagram and multi meter set up and made sure it was right. Ive tried changing some of the VFD parameters but to no effect, this 3hp motor begins to turn but then the VFD shuts off

  8. #8
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    Default No go

    Tried swapping the 6 wires around but still wont run . Ive noticed the 6 wires are actually a pair of twisted enameled copper wires , so in effect there are 12 wires .

    PS OK just worked out this motor is probably wired for 400V Delta not 240V . I will see what i can do .

  9. #9
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    Default clutch

    Ok the Hendey is running but the clutch is causing me grief, it has four rings that look like car gearbox syncro rings . The clutch drive engages when the rings are forced together and this friction drives the headstock. Problem is when the clutch is disengaged the rings are free to wobble and they make a horrible noise , the noise goes away once the clutch is released and the rings come together. I might just leave it and use the VFD to turn it off and on like I do with the Sheraton. Clutches on lathes, yes a nice idea but also a potential trouble spot.
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  10. #10
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    Nov 2017
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    Geelong, Australia
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    Default

    Is it a dry or wet clutch?
    Generally a multi plate clutch only needs about 20 thou or so clearance when disengaged. Is there any way to adjust it?

    Steve

  11. #11
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    Default adjust

    Quote Originally Posted by OxxAndBert View Post
    Is it a dry or wet clutch?
    Generally a multi plate clutch only needs about 20 thou or so clearance when disengaged. Is there any way to adjust it?

    Steve
    hi Steve

    I was looking at it and asking myself the same . There is a braking effect at the end of the clutch lever travel , the lever travel goes from clutch engaged at one end to the brake engaged at the other end , the rattling sound disappears as the plates are drawn together about half way in the lever travel. I will investigate the thing more

  12. #12
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    Default Progress maybe

    Ok I've been getting familiar with the Hendey .

    The VFD pulls 4 amps at 50 HZ with the headstock in the highest speed at around 700rpm . At 70 HZ the amps really go up to 9.5 and the whining headstock gears become less tolerable. With the clutch in the amps are 1.6 . The main high/low gears in the headstock ( sort of like a back gear) are helical .

    Still don't like the crunchy vibrating noises coming from the clutch unit , the four discs have about .120" of clearance when they are free or unloaded. I tried adjusting the clutch , the manual is rather basic .

    I have two new B85 belts on it ATM , but the new belts seem to be fighting each other , hopefully they will settle down with use.

    I have a Drive plate on the spindle as I don't have a chuck back plate yet ( 2.75" spindle ) , measuring the drive plate OD run out, the dial indicator didn't move at all , pretty impressive for a 80 year old lathe.

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