Drill Bit Makita B-42896 SDS 50 mm Diameter 570 mm Length

SDS drill bit Makita B-42896 with a 50 mm diameter and 570 mm overall length is engineered for drilling large-diameter, deep holes in concrete, masonry and other hard mineral materials. The bit is intended for use with SDS rotary hammers that accept SDS shanks and is suitable for professional trade and demanding DIY tasks where reliable performance and bit stability are required. The geometry and build are optimized to remove material efficiently while maintaining cutting accuracy over extended drilling depths.

Advantages

The drill bit provides stable drilling thanks to its rigid 570 mm length and a 50 mm cutting diameter that enables wide, consistent hole profiles. Its SDS-compatible shank allows quick and secure tool engagement for rotary hammers equipped with SDS chucks. The design focuses on efficient dust evacuation and reduced clogging to maintain drilling speed in reinforced concrete and hard masonry. The bit construction balances durability and cutting performance for repetitive professional use.

Suitable for

• Creating anchor and sleeve holes in concrete and block walls
• Installing piping or conduit through masonry
• Drilling for structural anchors and through-holes in reinforced concrete
• Tasks requiring deep, large-diameter holes in hard mineral substrates

Key specifications

• Drill diameter: 50 mm
• Overall length: 570 mm
• Shank type: SDS-compatible shank for rotary hammers
• Intended material: concrete, masonry and other hard mineral materials
• Application type: hammer drilling with rotary hammer

How to use

Install the SDS shank into a compatible rotary hammer following the tool manufacturer's instructions and ensure the chuck locks securely. Position the bit on the marked drilling point and start drilling at low speed to establish the hole, then apply controlled pressure and allow the hammering action to progress; avoid excessive axial force which can cause bit damage or reduced service life. Periodically withdraw the bit to clear dust and debris from the hole, especially when drilling to full depth. Use appropriate cooling or rest intervals when performing repeated long holes to prevent overheating.

Usage recommendations

Use appropriate personal protective equipment including safety glasses, dust mask or respirator, hearing protection and gloves. For reinforced concrete, use progressive drilling technique and correct anchor hole depth. Ensure the rotary hammer is rated for the bit length and diameter and follow safe working practices for overhead or deep drilling operations.