Recommendation? Surface Grinder contact wheel

B

Bob Duguay

Joined
Aug 28, 2017
Messages
204
Just picked up a lightly used Reeder surface grinder. It has a 4” 90 durometer.
What size and durometer do you guys recommend? Or is aluminum better?
Thanks
 
The 4" 90 durometer works good. I'll have to check, but I think I have 5" on mine, but I don't think it makes much difference. You want a hard rubber wheel so, 90 durometer is a must. I haven't tried an aluminum wheel, but I would think it wouldn't work as well.
 
@JTknives is one of the only makers I know that uses a metal wheel and his blades get FLAT - I'm pretty sure that the rubber wheels, no matter how hard, will have some runout at the beginning and end of the piece if you measures on a micrometer. I know mine did when I built a surface grinder attachment (don't recall the duro though)
 
I have a 6" 90 duro wheel on mine. Runout on mine is consistently. 0002 - .0003 max on mine. For me I feel like if you put your critical edges so they initially make contact with the wheel in the direction the belt is running it really gets it to almost nil as far as knives are concerned. For instance, I make slip joints so I always orientate the tang and the front of the spring so that I'm pushing them through in the direction the belt is running. On the push pass your going quickly with the direction of the belt and removing less material. On the pull pass your going against the direction of the belt and removing more material. I dont know if I'm explaining that right but in my mind it seems logical. That probably means it makes zero difference! Lol
 
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