 Re: stumpgrinder rpm
What's the dia of the wheel though? Also consider where the teeth are as they stick out a bit further, so should measure the dia to the tips of the teeth ...
... sounds too fast me, you'd be losing a lot of torque and getting a lot of dust.
The kanga used to run 125mm drive pulley onto 155mm cutter head pulley, using 3200rpm at the engine gave around 2500rpm at the cutter wheel, was bad!
Now cutter wheel is doing around 1800rpm as it cuts much better. I changed the drive pulley to 95mm dia ... could go less to 90mm dia and would be better.
I think to the teeth tips was around 550mm dia but dont hold me to that as been a while now. Turning speeds say 12,000ft/min tops for softwood but some hard woods down to 6000ft/min.
What's a chainsaw chain run at, around 2500ft/min to 5000ft/min but it's not tungsten carbide.
Concrete cutter saw runs 5000ft/min |