To work with BOSCH Rotary Hammers, you need special drill bits with SDS-plus shanks. These transfer the power of the machine onto the drill hole so efficiently that no power is lost. Some hammers are supplied with an additional . quick-change chuck This can replace the SDS-plus tool holder and will hold conventional drill bits with straight shanks.

You can use the BOSCH Rotary Hammer to drill holes in very hard materials, such as concrete, but also in masonry, wood or metal. Fit a corresponding drill bit depending on the material you want to drill.

Rules of thumb:

Hard materials (concrete, masonry):
masonry bit, hammering function

Soft materials (soft masonry such as aerated concrete, wood, plastic, but also metal):
HSS drill bitdrilling function- Tile & soft masonry: Karat multi purpose bits, drilling function

Before drilling, you should also establish the diameter and depth the hole is to have. Choosing the right drill bit depends on this as well as on the material you want to drill.

  Small hole diameter: higher rotational speed
  Large hole diameter: lower rotational speed

When drilling in sensitive materials, it is a great help to be able to limit the maximum speed. This is why many main switches have a small wheel built into them. This small wheel prevents you from pulling the main switch right back. The further you turn it down, the shorter the so-called control stroke becomes - and the lower the maximum speed. NB: If your machine has a small wheel of this kind and you are no longer satisfied with the power output, check the setting of the wheel before you take it in for repair. In many cases, the reason for the machine having too little power is that the speed was limited the last time it was used.