Description
The Forstreich SK50 spiral drill bit – handy, compact and powerful

Thanks to the self-feeding
coil
of the SK50 spiral cone, which is KWF-Profi certified, there is no need to
widen the saw cut.
This makes it ideal for the safe felling of
weaker timber and small
trunk diameters. Weighing just
1.7 kg and with a maximum stroke height
of 55 mm, it exerts a remarkable 5 tonnes of pressure on the
tree.
Properties and uses
Two hardened hex sockets with a 16 mm and a 22 mm wrench size, each with a bore hole, are available for connection to the impact wrench. This means that the SK50 spiral wedge can also be easily combined with our other felling wedges and used, for example, for re-tightening.
The symmetrical shape of the spiral reliably prevents the SK50 from working its way out of the wood.
A generously sized, lubricatable roller bearing ensures efficient power transmission and
guarantees a long service life.
Special features of the SK50 spiral cone
- KWF-Profi certification: Confirms the highest standards for professional forestry operations.
- Self-tapping spiral: No need to widen the cut.
- Two hexagonal sockets: hardened, 16 mm and 22 mm spanner sizes, with a bore.
- Versatile: Can be used easily in combination with other felling wedges (e.g. for repositioning).
- Symmetrical spiral shape: Effectively prevents the screw from coming loose in the wood.
- Efficient power transmission: generously dimensioned, lubricatable roller bearing for a long service life.
Technical specifications of the SK50 spiral cone
| manufacture | Made in the Black Forest | Max. pressure force | 5 tonnes |
| Weight (unit only) | 1.7 kg | Stroke per revolution | 12 mm |
| Length | 245 mm | Lifting height | 55 mm |
| Width | 80 mm | Spindle | 24 mm |
| Height | 55 mm | Torque (impact wrench) | SW16: 745 Nm SW22: 1627 Nm |
Suitable accessories for the SK50 spiral cone
- Select options This product has multiple variants. The options may be chosen on the product page






