1/8" Router Bit Feeds and Speeds
I cut a lot of access panels in pre-laminated sheet stock with a 1/8 diameter, then edgeband the inner panel. This leaves a very small reveal and matched grain, for example under a desk for access to wiring chase imbedded in a diewall or an access panel in a cabinet side.
Another great application is to make MDF face frames, whether beaded or not and the MDF door that fits the openings all out of one piece of material. Very low on waste this way as the door is in place on the table and the 1/8" gap is the 1/8 " bit. Takes a while to run, but just set up the sheet, get a coffee and when you come back the frame and doors are all done. If you are really cagey the biscuit or spline to fix the frame to the cabinet can be done first as "reverse side nesting", but that is another story. These applications both require the use of a 3/4" flute length, which gets very touchy for breaking bits, but five or six passes at 150RPM works great. Two, three and four flute tools of this configuration are available from MSC and other places.
From contributor D:
I've been using 1/8" bits for years, primarily for bead removal in door profiles. Minor uses are sharpening corner radii and machining grilles. I've achieved the best life in hardwoods running two flutes 100ipm at 16k. Chiploads don't apply so much with such a delicate bit. I've noticed higher feed rates possible using 3-4 flute hoggers designed for aluminum, but only the HSS ones, so the life span is pretty short there. The carbide bits designed for aluminum have less of a hook angle, and trying to run these any faster is futile. You have to be vigilant running this slow with downshear bits - fire is a very real danger when cramming hot chips into a groove.
From contributor U:
Everyone is right, feeds and speeds in the scope of things really donít apply that much. Depth of cut does play into it and material. Also, check those collets and replace two-three times a year if they are being used every day.
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