- Thread starter Bki26
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Hopefully gonna use the existing motor mount and just make up a plate which has holes for the imperial mounting bolt pattern and studs for the motor so I can tension by winding the nuts up or something along the lines of that, already got a hole in the wall for it to sit.
Spindle now out and things are looking better! The bushings are worn and one slid down hence the dramatic wobble so they'll be replaced, have decided to get a 1 1/2" x 1 3/4" x 2" one which I'll carefully turn the od down as it's about 1 11/16" and then I'll part it to make 2 ~1" long bushes like what's already there.
It seems the headstock has been apart before over it's lifetime as one of the keys is missing and spindle has grub screw marks where there shouldn't be because of said missing key so will sand them down and can replace the key with one from the CVT pulley as just so happen to be exactly the same!
It seems the headstock has been apart before over it's lifetime as one of the keys is missing and spindle has grub screw marks where there shouldn't be because of said missing key so will sand them down and can replace the key with one from the CVT pulley as just so happen to be exactly the same!
Well father has decided to completely strip it including the gearbox and saddle/apron next to deep clean it though I think it's more of a want to take it apart to see how it ticks like I would 
At some point somebody has replaced the tumbler gears with aluminium ones and they could definitely do with being replaced though it's trying to find a reasonably priced pair of 26t 14dp gears or perhaps someone who could make them from some 2" bar.
At some point somebody has replaced the tumbler gears with aluminium ones and they could definitely do with being replaced though it's trying to find a reasonably priced pair of 26t 14dp gears or perhaps someone who could make them from some 2" bar.
dieselsamurai
Too many projects not enough time!
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I 3D printed all the gears I had missing on my lathe and still going strong 3 years later but tumbler gears get a lot of abuse there was a guy on ebay that will cut any size out of a very tough plastic
Pete.
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Well father has decided to completely strip it including the gearbox and saddle/apron next to deep clean it though I think it's more of a want to take it apart to see how it ticks like I would
At some point somebody has replaced the tumbler gears with aluminium ones and they could definitely do with being replaced though it's trying to find a reasonably priced pair of 26t 14dp gears or perhaps someone who could make them from some 2" bar.
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Those tumbler idlers work very well made from Delrin and make the lathe a whole bunch quieter. If you can find about 8" of it I'll make them for you.
Agroshield
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Just as food for thought, with a Chipmaster, which goes from 30-3000 rpm, I have never needed its top speed but have had a few things where I would have appreciated a lower bottom speed.
It is not all that clear what happens between 100rpm and 750rpm in your system. 100Hz (200rpm) in backgear might not be kind to the machine, and 25Hz in open gear gives 375rpm.
Without the backgear the reduction is 1.95:1 total (1.5:1 motor pulley and 1.3:1 internal pulley) so motor at rated speed at 50hz (aka 100% power 1410rpm) is 723rpm spindle and assuming not going below 20hz to keep some torque then that's 289rpm, and if bumping motor to 100hz (200% power 2820rpm) it gives me a spindle rpm of 1446 which is plenty for me.
With backgear then reduction is 13.65:1 so 50hz at motor gives 103rpm spindle, 20hz gives me 41rpm spindle so 0.7 rotations a second which I don't know about your tastes but is slow enough for me
Funnily enough I just quickly made a copy and printed it to see how well it fits and was gonna order a pair in PA12 nylon MJF (stronger than SLS nylon) via jlc3dp.com as £20 delivered is cheaper than £140 from lathes.co.uk for 2 cast iron when all they'd be driving is the gearbox/power feed which isn't spindle rpm like they are meaning I should get away with it and in any unfortunate crash they would probably fail first like a fuse perhaps?
*edit* forgot to say it turns out the aluminum gears are actually 20° pressure angle as print is 14.5° and meshes perfectly which also explains why one is so badly worn, thankfully it's aluminium so it hasn't completely destroyed the iron spindle gear but has worn it down a bit!
That's very tempting, they need to be 14dp 14.5° though so would need the right gear cutter or do you have one?
I know my friend bought a set of them since he wants to make replacements for his Colchester but hasn't go round to building his workshop yet to actually do it. even though I bought him a parkson no.1n horizontal/vertical mill which is sitting in another friend's barn, think I got a rotary table with it so could probably hire a 3 phase genny and get it running to cut replacements lol
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