I’m just doing more experiments on MDF before I go for a real carving job, and I’m just now starting to go back over my models and program finishing passes into them after a sloppy prototype yesterday using a spiral upcut bit.
I’ve done some reading and seen that the general consensus in this debate is that spiral bits are superior in every way apart from price. If this is true, should I be using my straight bits on roughing passes and spirals on finishing passes to make them last a little longer?
Will I see much of any difference when I’m using MDF? If not, should I just use the straight bits all the way on this stock?
Finally, I’m a little unclear on the ability for a straight bit to perform surface plunges and clearing. One website said that there’s a limit to their vertical depth due to a gap at the end of the blade? I’m not seeing that on these 1/8" straights from Inventables, maybe it applies to larger diameters more. I’d like to use them for pocket clearing (and finishing depth passes as well) if possible, but I won’t bother if it’s going to present more parameters to program around…
Any insight greatly appreciated!