SDS-max Drill bit
HERMAN DC-30
For drill hammers

Drill head fitted with large main and two side carbide inserts:
proven stable design for precise hole drilling

130˚ large carbide core insert bits:
It enables fast drilling with minimal side damage to the drill bit when hitting steel reinforcement in concrete

Drill body made of high-strength Cr-Ni-Mo steel, with blast-treated surface:
high resistance to lateral stresses, breakage of the drill bit during erection is very unlikely

Asymmetric double helix with initial run-up directly at the drill head:
It reduces drilling friction and contributes to increased drilling speed by immediately diverting the drilled material away from the drill head

PGM mark on the drill shank:
guarantee of compliance of the drill diameter tolerance with the standard for drilling precision holes for dowels and anchors

Recommendation:
When using drill bits with a working length of 400mm or more, it is necessary to pre-drill a hole of the same diameter with a depth of at least 150mm, with a working length of 800mm or more, at least 350mm

Recommendation:
Lubricate the drill shank with grease. This will prevent premature wear and prolong the life of the quick-release system in your drill hammer

Markings:
The markings SDS-plus and SDS-max are trademarks of Robert Bosch GmbH, Stuttgart, BRD.