drill bit type wood
Drill bits are often classified by the materials from which they are manufactured and the coatings applied to them. high-speed steel (hss) drill bits are used for drilling wood, light metals, fiberglass and pvc.; black oxide-coated drill bits are more durable than standard hss bits and the coating helps the drill bit resist rust. these are best for hardwood, softwood, pvc, fiberglass and steel.. Another type of wood drill bit is a flat bit. flat bits have a centre point but have a flat cutting edge and look similar to a spade. a sharp, flat bit will quickly cut a clean hole. these bits can be sharpened after use with a file. flat bits are relatively inexpensive because of their uncomplicated construction.. Forstner bits are a very specialised drill bit type commonly used for installing concealed hinges (usually 26mm or 35mm in diameter). they are capable of boring large diameter holes in wood, and their flat-bottom design enables users to pull just short of going through the piece of wood..
drill bit type wood
The larger bits require a fairly powerful drill to bore deep holes. the bits cause a lot of splintering as they break out the back of the workpiece - using a sacrificial backing board will reduce this. flat wood bits are not really suitable for enlarging an existing hole. sizes range between 8 and 32mm.. Installer bits, also known as bell-hanger bits or fishing bits, are a type of twist drill bit for use with a hand-portable power tool. the key distinguishing feature of an installer bit is a transverse hole drilled through the web of the bit near the tip..
