Fully ground HSS is fairly common in premium quality metalworking drills, although most manufacturers deem it unnecessary over specification in woodwork tooling. FAMAG disagree, they believe that using over specified materials and manufacturing methods results in a tool that will deliver superior performance, durability and results. It took me one hole with the FAMAG 1594 series drill to work out who was right.
Usually the spiral channel that extracts the chips is a symmetrical U shape in cross section. FAMAG round over the trailing edge which increases the amount of space for waste removal by nearly 50%. The pitch is also more aggressive which also helps to keep the cutting face clear.
You don't get compressed wooden spirals stuck in the flutes with these bits, instead they eject a plume of chips as they are cutting, which means you can go to full depth as fast as you like and they still cut cleaner, cooler, faster and longer than anything else on the market.
drill size
shaft diameter
overall length
cutting length
2mm
2mm
49mm
22mm
2.5mm
2.5mm
57mm
25mm
3mm
3mm
60mm
33mm
3.5mm
3.5mm
70mm
39mm
4mm
4mm
75mm
43mm
4.5mm
4.5mm
80mm
47mm
5mm
5mm
85mm
52mm
5.5mm
5.5mm
92mm
57mm
6mm
6mm
92mm
57mm
6.5mm
6.5mm
100mm
63mm
7mm
7mm
108mm
69mm
7.5mm
7.5mm
108mm
69mm
8mm
8mm
115mm
75mm
8.5mm
8.5mm
115mm
75mm
9mm
9mm
125mm
81mm
9.5mm
9.5mm
125mm
81mm
