Drill bit Dedra WPQ2860, diameter 28 mm, for concrete/brick/stone/aerated concrete, point angle 135°

Dedra WPQ2860 drill bit with a 28 mm diameter and 135° point angle is designed for drilling into concrete, brick, natural stone and aerated concrete. The single-piece design and geometry are optimised for use with both rotary and hammer drills to create clean anchor holes, through-holes and mounting points in masonry. The bit’s profile balances material removal and hole precision for common construction and installation tasks.

Advantages

The solid construction and hardened cutting edges provide increased wear resistance and longer service life when used on abrasive masonry materials. A 135° point angle reduces walking at the drill start and helps maintain straight drilling in hard substrates. The 28 mm diameter is suited to standard anchoring and dowel systems, while the geometry supports efficient dust evacuation and consistent hole quality in brick, concrete and stone.

Suitable for

• Drilling anchor and dowel holes in concrete and brick
• Creating through-holes for pipes and conduits in masonry
• Installing fixtures and mounting hardware on natural stone and aerated concrete
• Construction and renovation tasks requiring larger-diameter masonry holes

Key specifications

• Diameter: 28 mm
• Point angle: 135°
• Material compatibility: concrete, brick, natural stone, aerated concrete
• Design: single-piece drill bit with geometry optimised for masonry
• Suitable drill types: rotary drills and hammer drills

How to use

Select a drill and operating mode appropriate for the material: rotary hammer mode for hard concrete and natural stone, rotary mode or light percussion for brick and aerated concrete depending on drill capability. Mark the drilling point, secure the workpiece or area, and start drilling at low speed to establish the hole. Apply steady axial pressure without excessive force to avoid bit or drill overload. Clear dust periodically from the hole to maintain drilling efficiency and check hole diameter with the required anchor or fastener.

Usage recommendations

Wear appropriate personal protective equipment including eye protection, hearing protection and dust mask when drilling masonry. Use a depth stop or mark on the bit for consistent hole depths. For extended drill life, avoid overheating by withdrawing the bit regularly to remove dust and allow cooling; choose a drill with suitable impact energy for dense concrete to reduce stress on the bit.