Then, place your workpiece on top of the sacrificial backing (this can also be a piece of scrap wood if this is your first time using this type of bit). These bits should be replaced or sharpened to prevent excessively tearing up the exterior of your workpiece. To this end, you should ensure that every edge of your Forstner bit can come into contact with the wood’s surface at the same time. Quote from: Michael Kellough on February 14, 2013, 01:09 PM I don't have that CMT bit but I do have the Festool bit and while it does bore a clean hole quickly the hole is about . To begin with, a Forstner bit is a unique type of boring drill bit that allows a woodworker to create clean, flat-bottomed holes in a workpiece.

Famag Boremax Forstner Drills - Yandles Famag Boremax Forstner Drills - Yandles

You’ll know your bit is getting dull if it “walks” around a board’s surface excessively when you are attempting to drill with it. Once you’ve mounted a piece of backing into place, you can begin to prepare your hand drill for use. The bit is long enough to fit on the router table and in a handheld drill, but it is possible that the bit would bind if trying to use it with a router. Keep it cool: Forstner bits are known for heating up if they are used to make several holes in a row. If you intend to press all the way through and create a full hole, you can continue from this point.This will allow you to align your hole more reliably once you begin to cut into that structure’s surface.

Forstner Bits | Drill Bit Sets | Screwfix

According to the CMT catalogue I'm holding in my hand it's a boring bit for hand held drills AND ROUTERS and the shaft is 8 mm. These Forstner bits are designed to give you increased edge contact, which means less tear out and a cleaner cut. Forstner or pattern maker's bits are unlike any other type of boring bit in that they are guided by their rims and centre point.These rims come in several different styles, but always allow a hole made by that bit to come out smooth and even. than the standard MFT holes, is there an undersized 20mm bit that produces the same MFT-sized holes? This rim even guides the bit at the beginning of a cut, which can be crucial when making a series of identical bores. Quote from: weekendwarrior on December 20, 2014, 09:19 PM I realize this thread is a bit old, but I have the same question: as Michael stated above, if the Festool 491072 produces a larger hole (. Most Forstner bits use a cutting lip on the shank that prevents damage to the workpiece and allow the bit to cut cleanly when fully engaged.

Forstner Bits | Total Tools Forstner Bits | Total Tools

However, if you plan to bore all the way through your workpiece, clear out any friction-causing saw dust and continue this process until popping out the other side (and into your sacrificial backing piece, ideally). With your intended center point marked, you should now align the center of your hand drill’s Forstner bit with the center of that mark.

Not only that, but those same crafters should know how to use a Forstner bit in both a hand drill and a drill press.