Diamond Segment for Core Drill Bit

Re-tip whenever the steel body is sound — which is most of the time. The inspection criteria are straightforward: the tube must be straight, the crown seats clean and undamaged, and the thread or arbor end undisturbed — any of those defects transfers into the cut and costs more in hole quality than the body saves. Bodies bent from misuse, cracked, warped from overheating, or with seat geometry worn beyond clean brazing retire from the re-tip pool. Fleets running standardized bit sizes typically re-tip multiple times per body: track re-tip count per body and inspect seats before every cycle. The economics follow volume: at occasional use, new bits are simpler; at fleet scale with a brazing process, segment supply plus body reuse is the lower-cost loop — and the 10 mm segment height in this program is sized for exactly that cycle.

There is no universal number — segment count follows the bit diameter and the crown design. In this program, small bits run few segments (3 at 25 mm) and large bits run many (12 at 152 mm and above), because the crown must distribute cutting contact evenly around the circumference. Loading a small bit with big segments or a large bit with too few creates uneven wear, wandering holes and premature crown failure. When ordering segments for re-tipping, match the count and dimensions to the original crown specification of the bit body — the specification table by diameter is the reference, and DINOSAW confirms the set against the body dimensions you provide. If you are developing a new bit size, the segment count is engineered from the diameter, target feed rate and material class together, not chosen from habit.

Often yes — the deciding factors are aggregate type, aggregate abrasiveness and reinforcement content, not the word 'concrete' alone. A plain concrete with soft limestone aggregate wears a crown very differently from a high-strength mix with hard river gravel, and reinforcement adds steel transitions that load segments in impact spikes. Provide the concrete class, the aggregate type if known, and the rebar ratio, and DINOSAW specifies the formulation: tougher bonds and protected diamond for reinforced and hard-aggregate work, faster-cutting formulations for soft plain concrete. Fleets that drill across classes stock the corresponding segment sets and track life per class — a segment that excels in plain concrete may wear fast in reinforced work, and that is material behavior, not a defect. The same data-driven selection applies to asphalt and masonry, where the wear regimes differ again.