Peter Pedisich
09-29-2008, 9:57 PM
Hi,
...tried out this bit today (41426 - Super Plunge) by Amana
http://www.amanatool.com/bits-fv/41410.html
It's a 1/2" dia carbide tipped straight bit with a piece of carbide between the two flutes which according to Amana makes it "Ideal for mortising and other plunging operations".
Trying to plunge into the end grain of 5/4 white pine it started to burn quickly, smoking as in smoke and another 2 seconds probably in flames.
I was running it at speed 5 on my router, which I believe is close to 19, 20k rpm. And plunging firmly but not too slowly.
I guess I should have listened to the folks here and got a spiral upcut!
Any idea why this happened? Is Pine the culprit? or end grain?
Thanks for any help.
-pete
...tried out this bit today (41426 - Super Plunge) by Amana
http://www.amanatool.com/bits-fv/41410.html
It's a 1/2" dia carbide tipped straight bit with a piece of carbide between the two flutes which according to Amana makes it "Ideal for mortising and other plunging operations".
Trying to plunge into the end grain of 5/4 white pine it started to burn quickly, smoking as in smoke and another 2 seconds probably in flames.
I was running it at speed 5 on my router, which I believe is close to 19, 20k rpm. And plunging firmly but not too slowly.
I guess I should have listened to the folks here and got a spiral upcut!
Any idea why this happened? Is Pine the culprit? or end grain?
Thanks for any help.
-pete