Re: Large diameter forstner bits
Posted: Mon Mar 07, 2016 12:40 pm
Milwaukee Center feed screw pilots the bit and allows the bit to pull through fast and they are designed primarily for the trades.
They say "Milwaukee® Selfeed drill bits deliver speed and endurance for repetitive drilling of large holes. Designed for any trade that demands woodcutting for installing pipe and conduit", but a clean sidewall hole is a clean sidewall hole.
The bottom is going to be a bit rougher than a traditional Forstner bit will produce, and the pilot bit is wider, and deeper on the largest bits.
They go on to say that "SwitchBlade bits allow you to remove and replace blades rather than resharpen." Selfeed Bit 4-5/8" (48-25-4621) is the largest bit I have seen, but I wouldn't call it a Forstner as it will not produce a really flat hole. It isn't designed to. It is designed to bore through with a flat side wall.
Everett
They say "Milwaukee® Selfeed drill bits deliver speed and endurance for repetitive drilling of large holes. Designed for any trade that demands woodcutting for installing pipe and conduit", but a clean sidewall hole is a clean sidewall hole.
The bottom is going to be a bit rougher than a traditional Forstner bit will produce, and the pilot bit is wider, and deeper on the largest bits.
They go on to say that "SwitchBlade bits allow you to remove and replace blades rather than resharpen." Selfeed Bit 4-5/8" (48-25-4621) is the largest bit I have seen, but I wouldn't call it a Forstner as it will not produce a really flat hole. It isn't designed to. It is designed to bore through with a flat side wall.
Everett