Quote:
Originally Posted by mr. snodgrass
Hi guys. Good news (I think).
I happened upon my Grandad's ancient hand bench grinder today. It has a built in 10 to 1 gearbox, and I reckon could be "adapted" for other applications...
Now it might be a bit of a leap to turn a 60+ year old tool into a precision gear-box, but it might just be a goer for an output shaft speed in the 50k rpm mark.
BTW. there are plenty of cheap examples on ebay. Search for "antique bench grinder" or "hand bench grinder"
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If you have any sentimental attachment to your gearbox at all, definitely don't try this... And don't try it in the car until you bench test it lots.
My personal opinion is that the gears won't be balanced well enough, the bearings aren't ready for that rotation speed, and it will probably explode / grenade... But hey, try it
Just not near your car or anything that can get dinged up.