| Morris Dovey wrote: || || The "jumping" may indicate that the bit isn't adequately sharp. | | Other possibilities: | | 1) Router is not powerful enough | 2) Trying to take off too much material in a single pass | 3) Router is cheap one with plastic motor housing - not rigid | enough | | Or a combination of these. | | Maple is very hard stuff, so you've got to take it slow, and don't | try to take too much wood off in a single pass - the 1/16" | suggested by another poster is about right.
I fairly routinely make 1/2" deep passes feeding at 1-1/2"/sec (90"/min) with a two-flute up-spiral bit spinning at 18,000 RPM. On occasion, I've made profiling cuts a full inch deep with a straight bit. If the bits are sharp, hard maple cuts beautifully.
The sharper the bit, the easier it is to control the router - at any depth of cut. If the router is underpowered, it forces a slower feed by removing stock in front of the bit more slowly and could lead to overheating (and dulling) the bit. This hasn't ever been a problem for me (my least powerful router is a PC690); and I doubt it's the OP's problem because he'd have been able to hear his router bogging down.
Cheap router? Maybe - but I'd consider the bit sharpness to be the most probable culprit.
-- Morris Dovey DeSoto Solar DeSoto, Iowa USA
formatting link