Bosch 4-Cutter SDS Max Bits for Reinforced Concrete, 16 to 24 mm
Single SDS max bits from the Bosch Professional SDS max-8X range, in four sizes: Ø16 x 340 mm, Ø16 x 540 mm, Ø20 x 320 mm and Ø24 x 520 mm. The 4-cutter full carbide head makes these concrete drill bits suited to reinforced concrete, where they are designed to keep drilling when they meet rebar.
Bosch part numbers: 2 608 578 612 (Ø16 x 340 mm) · 2 608 578 613 (Ø16 x 540 mm) · 2 608 578 626 (Ø20 x 320 mm) · 2 608 900 239 (Ø24 x 520 mm, EXPERT) (also written 2608578612 or 2.608.578.612, and so on)
EAN: 3165140961196 (Ø16 x 340) · 3165140961202 (Ø16 x 540) · 3165140961332 (Ø20 x 320) · 4059952533131 (Ø24 x 520)
These are hammer drill bits for heavy rotary hammers and combi hammers with an SDS max chuck: large anchor holes and through-holes for pipes and cables in walls and slabs. The carbide head is welded to the body, and the 24 mm size is from the newer EXPERT line, made with a one-piece carbide head. They do not fit SDS plus machines.
Technical data
| Specification |
Value |
| Series |
Bosch SDS max-8X (Ø24 mm: EXPERT SDS max-8X) |
| Shank |
SDS max |
| Sizes (Ø x working / total length) |
16 x 200 / 340 mm · 16 x 400 / 540 mm · 20 x 200 / 320 mm · 24 x 400 / 520 mm |
| Cutting head |
4-cutter, full carbide |
| Head connection |
Welded |
| Materials |
Concrete, reinforced concrete, masonry |
| Suitable tools |
Rotary hammers and combi hammers with SDS max chuck |
| Pack |
1 bit |
SDS max or SDS plus: which one fits your drill?
What is SDS max?
SDS max is the chuck system used on heavy rotary hammers and breakers, usually for larger and deeper holes. The shank is 18 mm across with five grooves, which carries more impact energy than the smaller SDS plus system.
Can you use SDS max bits in an SDS plus drill?
No. An SDS max shank (18 mm) will not go into an SDS plus chuck (10 mm), and an SDS plus bit will not lock into an SDS max chuck. Check your machine before ordering: if it takes SDS plus, choose SDS plus drill bits instead.
SDS vs SDS max: how do I tell which drill I have?
Look at the drill's nameplate or manual, or measure an existing bit's shank: about 10 mm means SDS plus, about 18 mm means SDS max. Most compact and cordless rotary hammers are SDS plus; SDS max is found on larger, heavier machines.
