Forstner bits

SERIES:  537

Alloyed steel tool Two cutting edges Two spurs Right-hand rotation
D L S RH-LH Order No. Buy now Availability
10mm 90mm 8x30mm RH 537.100.31 Buy now Not available
12mm 90mm 8x30mm RH 537.120.31 Buy now Available
14mm 90mm 8x30mm RH 537.140.31 Buy now Available
15mm 90mm 8x30mm RH 537.150.31 Buy now Not available
16mm 90mm 8x30mm RH 537.160.31 Buy now Available
18mm 90mm 8x30mm RH 537.180.31 Buy now Available
20mm 90mm 8x30mm RH 537.200.31 Buy now Available
22mm 90mm 8x30mm RH 537.220.31 Buy now Not available
24mm 90mm 8x30mm RH 537.240.31 Buy now Available
25mm 90mm 8x30mm RH 537.250.31 Buy now Available
26mm 90mm 8x30mm RH 537.260.31 Buy now Available
28mm 90mm 8x30mm RH 537.280.31 Buy now Not available
30mm 90mm 8x30mm RH 537.300.31 Buy now Available
32mm 90mm 10x30mm RH 537.320.31 Buy now Available
35mm 90mm 10x30mm RH 537.350.31 Buy now Available
38mm 90mm 10x30mm RH 537.380.31 Buy now Not available
40mm 90mm 10x30mm RH 537.400.31 Buy now Available
45mm 90mm 10x30mm RH 537.450.31 Buy now Not available
50mm 90mm 10x30mm RH 537.500.31 Buy now Available
55mm 90mm 10x30mm RH 537.550.31 Buy now Available
68mm 157mm 12.7x50mm RH 537.680.31 Buy now Available


-Super strength SP steel.
-Precision balanced centre point.
-2 spurs (V2).
-2 precision ground cutting edges (Z2).
-Long-lasting cutting performance.


Standard rim provide better guidance but tend to overheat. To overcome heat the larger diametres (>=Ø25mm) are designed with toothed rims.




-Making repeated shallow cuts and allowing the bit to cool for two or three seconds between passes will increase the life of your bit. Overheating caused by chip buildup or constant contact with the cutting surface will remove the temper from the bit’s cutting edges.


-You can also extend the life of your bits by not exceeding the maximum speed recommended for the type of wood. Applying excessive force to the bit while drilling will also cause overheating.


-Remove all the chips from the previous hole before boring a second or subsequent hole when mortising.


-Small Forstner bits can be used in a hand drill, but the results are usually less than satisfactory. Using bits larger than 19mm (3/4”) in a hand drill can cause injury when the bit hangs on an imperfection in the wood.


-Always wear proper eye and hearing protection when working with power tools.
Used to drill precise flat bottom holes with no chipping in any softwood thickness.

Recommended R.P.M.
Part No. D (mm) Softwood Hardwood
537.100.31 10 2400 700
537.120.31 12 2400 500
537.140.31 14 2400 500
537.150.31 15 2400 500
537.160.31 16 2400 500
537.180.31 18 1500 500
537.200.31 20 1500 500
537.220.31 22 1500 500
537.240.31 24 1500 500
537.250.31 25 1500 500
537.260.31 26 1500 500
537.280.31 28 1000 250
537.300.31 30 1000 250
537.320.31 32 1000 250
537.350.31 35 500 250
537.380.31 35 500 250
537.400.31 40 500 250
537.450.31 45 500 250
537.500.31 50 500 250
537.550.31 55 500 50
537.680.31 68 400 200
WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance know to the State of California to cause cancer. Avoid inhaling wood dust or use dust mask or other safeguards for personal protection. For more information go to