Diamond Core Drill Bits Manufacturer & OEM Programs

The barrel (tube body) is a critical load-bearing component. Our professional core-bit programs use two seamless alloy-steel grades:

• 30CrMnSi (~750 MPa yield strength): premium fatigue resistance for large-diameter wet core bits (Ø100mm+) on high-power rigs under sustained torque.
• 42CrMo / AISI 4140 (~700 MPa yield strength): the standard OEM alloy-steel platform across wet and dry professional programs.

Reinforced-concrete applications are matched to alloy-steel tubes for torque stability and resistance to barrel cracking during rebar engagement.

The three methods of attaching diamond segments to the barrel body differ in strength and application:

• Laser Welded: The industry standard for professional core bits. A focused laser fuses the segment directly to the steel barrel, creating a bond stronger than the segment itself. Safe for rebar contact. All our wet core bits are laser welded.
• Sintered (Hot Press): The diamond-metal powder matrix is pressed and heated together with the barrel in a single operation. Used for small-diameter bits and specialty applications.
• Brazed (Silver Solder): Segments are attached using a silver-alloy brazing filler. Lower bond strength — NOT suitable for rebar contact or high-torque applications. Common in budget bits.

For any application involving reinforced concrete, laser welding is the only segment attachment method we recommend.

OSHA 29 CFR 1926.1153 Table 1 specifies controls for respirable crystalline silica exposure during construction tasks. For stationary core drilling rigs used on concrete:

• Wet drilling with continuous water supply through the bit is the specified engineering control.
• No additional respiratory protection is required when using a rig-mounted wet core drill with continuous water feed per Table 1 guidelines.
• Dry core drilling is NOT listed in Table 1 — if you drill dry, you must perform an exposure assessment and may need respiratory protection.

Our wet core drill bits are designed with water channels that maintain continuous flow, supporting Table 1 compliance. Contact us for documentation to support your silica compliance program.

Diamond bond hardness must be matched inversely to the material hardness:

• Soft bond (for hard materials): The softer metal matrix wears faster, continuously exposing fresh diamonds. Use for hard concrete, granite, and heavily reinforced structures.
• Hard bond (for soft materials): The harder matrix wears slowly, holding diamonds longer. Use for brick, block, asphalt, and green (uncured) concrete.

Common mistake: Using a hard-bond bit on hard concrete — the diamonds glaze over instead of being released, and the bit stops cutting entirely. If your bit cuts well initially but slows dramatically, the bond is likely too hard for the material.

We formulate segment bonds to match your target market. Tell us what materials your customers typically drill, and we will specify the optimal bond.

Yes. Diamond core bits are standardized by thread connection, not by machine brand. Compatibility is determined by matching the thread:

• 1-1/4" UNC: Fits Hilti DD series, Husqvarna DM series, WEKA DK series, and most professional drill rigs worldwide.
• 1/2" BSP: Fits European and Asian handheld core drills from Makita, Bosch, and others.
• 5/8"-11 UNC: Fits North American handheld drills and angle grinder adapters.

If your machine has a different connection (M18, Hex, SDS-Plus/Max), we supply adapters to convert between standards. Specify your machine model when ordering and we will confirm the correct thread.

Watch for these signs:

• Dramatically slower cutting speed despite correct RPM, water flow, and feed pressure
• Segments visibly worn below 2mm remaining height (measure from the weld line)
• Segment loss — any missing segment means the bit must be retired immediately
• Barrel deformation — any visible bend, crack, or out-of-round condition
• Glazed segments — a smooth, shiny appearance on the cutting face means diamonds are no longer exposed. A glazed bit can sometimes be recovered by cutting a few passes into abrasive material (asphalt or sandstone) to re-expose the diamonds.

A well-maintained bit in appropriate material should deliver 15–30 linear meters of drilling in concrete before segment replacement.

Arix is a patented segment technology (originally developed by Husqvarna / Arix Diamond Technology) that positions individual diamond crystals in a precise matrix pattern within the metal bond, rather than randomly distributing them.

• Standard segments: Diamonds are mixed randomly into the metal powder before pressing. Diamond concentration varies across the segment — some areas cut faster, some slower.
• Arix-pattern segments: Each diamond is placed in a calculated position. This delivers consistent cutting speed across the entire segment life, typically 20–30% longer than random-distribution segments.

Arix-type technology is most beneficial for large-diameter wet core bits (Ø80mm+) in reinforced concrete, where segment cost is a significant portion of the total tool cost and maximizing life per segment is critical.

We offer Arix-compatible matrix-positioned segment technology for OEM customers who require premium-tier performance.