The Shop > Tools
Tool Post Grinder
spuddevans:
--- Quote from: sbwhart on October 05, 2009, 12:20:53 PM ---
Now to open up the mounting to take the spindle, I could have done this in the four jaw just clamp the two plate together set them up in the four jaw and drill and bore them out to size as a pair, for a grinding spindle this would have got them close enough on the lathe centre height. But I though I'd do it another way that would get thing dead on centre, this is the best way for any of you making a cross hole drilling sub spindle.
--- End quote ---
That is a really good way of boring the mounting exactly on lathe centre height :thumbup: :thumbup: , I'll file that away for future reference as I'd like to make a toolpost grinder at some point in the future, thanks Stew :thumbup:
Tim
sbwhart:
I decided to clamp the spindle in the mountains with a couple of M6 grub screws I put a 4mm drill down the end of the grub screws and superglued a little slug of brass into for the screw to tighten down onto so it won't mark the spindle.
Then I made the mounting plate for the motor. I used a bit of 1/4" thick ally plate, it was a mater of drilling holes where required along with a bit of filing.
This is it fitted to the motor
It certainly looks the part as for working well yes and no for the lower speed pulley selection it seem to work OK, but when I swap it over to the higher speed pulley selection it slowly turn over and starts to let the smoke out I guess the motor is stalling. It just doesn't have the humf to drive the faster speed, I guess the spindle is to heavy for the motor, I was a bit uncertain about the suitability of this small motor, but small motors with the speed (6000 ish RPM) and the HP just don't seem to be out there.
This what was on the motor I tried
Perhaps some of you chaps who understand these thing can point me in the right direction as regard motor selection.
Cheers
Stew
bogstandard:
I have only just noticed that all the posts on this topic are from the UK.
What's wrong lads, cat got your tongue or are you all scared to death of this sort of thing?
I think I have shown this link before for the benefit of our US cousins (or anyone else in the UK who doesn't mind getting a cheapo site transformer to give the 110 volts, about 40 squid). Just in case you don't fancy making one.
http://littlemachineshop.com/products/product_category.php?category=-1731696149
Stew, if you come round sometime, we can have a root thru the motors I have, we just might find one that will do the trick. But make it during daylight hours, they are in outside storage boxes.
Bogs
Darren:
Oh dear Stew, and there's me having just come home with a sewing machine with motor .... :doh:
NickG:
Stew,
That motor has a max power output of 90w, which isn't very much anyway, and because that max power comes at 6000rpm this means the torque is very low since power is a function of torque and speed. Because you're gearing up even further, you'll need something with quite a high starting torque. But usually that means sacrificing some speed!
Nick
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