Diamond Drill Bit Diameter Specification Table: Brands, Models, and Detailed Specifications

1. Bosch Diamond Drill Bits

Model: Bosch Professional Diamond Core Drill Bit (Diameter Range: 10mm – 200mm)

• 10mm Diameter: Bosch Professional 2608595037
  This small-diameter core drill bit is ideal for drilling holes in tiles, ceramic, and thin concrete surfaces. It features a electroplated diamond coating, which ensures a sharp cutting edge and smooth drilling. The 10mm size is commonly used for installing small fixtures, such as towel bars or curtain rods, in bathrooms and kitchens. The bit has a shank diameter of 10mm, making it compatible with most standard drills and rotary hammer drills. It is recommended for use at a rotational speed of 1,500 – 3,000 RPM, with water cooling to prevent overheating and extend the bit’s life.
• 25mm Diameter: Bosch Professional 2608595052
  A mid-range diameter in the core drill series, the 25mm bit is suitable for drilling holes in medium-density concrete, brick, and natural stone. It utilizes a sintered diamond segment design, where diamond particles are embedded in a metal matrix, providing enhanced durability and cutting efficiency compared to electroplated bits. The 25mm hole size is commonly used for running electrical cables, plumbing pipes, or installing wall anchors in residential and commercial buildings. The bit has a 16mm shank, compatible with most core drilling machines, and operates optimally at 1,000 – 2,500 RPM with water cooling.
• 100mm Diameter: Bosch Professional 2608595120
  This large-diameter core drill bit is designed for heavy-duty applications, such as drilling holes for ventilation ducts, plumbing pipes, or structural supports in thick concrete or reinforced concrete. The 100mm diameter allows for the passage of larger pipes and cables. It features a segmented design with high-quality synthetic diamonds, ensuring efficient cutting even through steel reinforcement. The bit has a 5/8” – 11 UNC thread shank, compatible with professional core drilling rigs. The recommended rotational speed is 300 – 800 RPM, with continuous water cooling to manage heat buildup during prolonged use.
• 200mm Diameter: Bosch Professional 2608595200
  One of the largest diameters in Bosch’s core drill range, the 200mm bit is used for major construction projects, such as drilling holes for large-diameter pipes, manholes, or industrial equipment installations. It features a robust, heavy-duty construction with thick sintered diamond segments and a reinforced steel body to withstand the high torque and pressure involved in drilling large holes in dense materials. The shank is a 1 1/4” – 7 UNC thread, compatible with industrial-grade core drilling machines. Operating speeds range from 100 – 300 RPM, with a high-volume water cooling system to prevent the bit from overheating and maintain cutting performance.

Model: Bosch MultiConstruction Diamond Drill Bit (Diameter Range: 4mm – 32mm)

• 4mm Diameter: Bosch 2608595004
  The smallest diameter in the MultiConstruction series, the 4mm bit is ideal for precision drilling in delicate materials like glass, ceramic tile, and thin stone. It features a diamond grit coating that ensures clean, chip-free holes. Common applications include drilling holes for small screws, jewelry making, or crafts. The bit has a 3mm shank and operates at 2,000 – 4,000 RPM, with light water cooling or a lubricating spray to prevent cracking in brittle materials.
• 12mm Diameter: Bosch 2608595012
  A popular size for general-purpose drilling, the 12mm bit is used for installing wall plugs, drilling holes for electrical outlets, and mounting shelves. It works efficiently in concrete, brick, and natural stone, thanks to its hybrid diamond coating that combines electroplated and sintered technologies for balanced performance. The 12mm diameter is compatible with most standard drills, with a 10mm shank and recommended speeds of 1,000 – 2,000 RPM.
• 32mm Diameter: Bosch 2608595032
  The largest diameter in the MultiConstruction series, the 32mm bit is designed for drilling larger holes in concrete, masonry, and thick stone. It is commonly used for installing larger pipes, such as waste pipes in kitchens and bathrooms, or for creating openings for ventilation grilles. The bit features a reinforced tip to prevent wandering during drilling and a flute design that efficiently removes debris. It has a 16mm shank and operates at 500 – 1,500 RPM, requiring consistent water cooling for optimal performance.

2. DeWalt Diamond Drill Bits

Model: DeWalt DW5470 Series Diamond Core Drill Bits (Diameter Range: 14mm – 152mm)

• 14mm Diameter: DeWalt DW5470-14
  This compact core drill bit is ideal for drilling small holes in concrete and brick, commonly used for electrical wiring and small plumbing lines. It features a sintered diamond segment with a high diamond concentration, ensuring fast cutting and long life. The 14mm diameter bit has a 10mm shank and is compatible with most rotary drills and hammer drills. It operates at 1,200 – 3,000 RPM, with water cooling recommended to prevent overheating.
• 50mm Diameter: DeWalt DW5470-50
  A mid-sized core drill bit, the 50mm diameter is suitable for drilling holes for medium-sized pipes, such as water supply lines or HVAC ducts. It features a reinforced steel body with a precision-ground tip to ensure accurate hole placement. The diamond segments are designed to withstand the impact of drilling through aggregate in concrete, providing consistent performance. The bit has a 16mm shank and works best at 800 – 2,000 RPM, with a built-in water channel for efficient cooling.
• 152mm Diameter: DeWalt DW5470-152
  One of the largest in the series, the 152mm diameter bit is built for heavy-duty core drilling in thick concrete and reinforced structures. It is commonly used in commercial construction for drilling holes for large pipes, elevator shafts, or structural columns. The bit features a thick-walled steel tube to prevent bending under high torque, and extra-hard diamond segments that can cut through rebar and other metal reinforcements. It has a 2 1/2” thread shank for compatibility with industrial core drilling machines and operates at 200 – 600 RPM, with a high-pressure water cooling system.

Model: DeWalt DWA580 Series Diamond Drill Bits (Diameter Range: 6mm – 25mm)

• 6mm Diameter: DeWalt DWA580-6
  This small-diameter bit is perfect for drilling holes in ceramic tiles, glass, and porcelain, where precision and chip-free results are critical. It features a electroplated diamond coating with a fine grit, ensuring smooth cutting and minimal damage to delicate surfaces. The 6mm size is used for installing shower fixtures, towel rails, and small hardware. The bit has a 6mm shank and operates at 2,500 – 4,500 RPM, with light water cooling (e.g., using a spray bottle) to keep the tip cool.
• 16mm Diameter: DeWalt DWA580-16
  A versatile size in the DWA580 series, the 16mm bit is used for drilling larger holes in tiles and stone, such as for faucet installations or pipe penetrations in bathroom walls. It features a tapered design that reduces pressure on the material, preventing cracking, and a diamond coating that ensures fast, clean cuts. The bit has a 10mm shank and is compatible with most cordless and corded drills, operating at 1,500 – 3,000 RPM with water cooling.
• 25mm Diameter: DeWalt DWA580-25
  The largest in the DWA580 series, the 25mm bit is designed for drilling holes in thick stone tiles, marble, and granite, commonly used in kitchen countertops and flooring installations. It features a reinforced tip to prevent wandering and a wide flute design that efficiently removes debris, reducing the risk of clogging. The bit has a 16mm shank and operates at 1,000 – 2,000 RPM, with continuous water cooling to maintain performance and extend lifespan.

3. Hilti Diamond Drill Bits

Model: Hilti DD-BI Diamond Core Drill Bits (Diameter Range: 12mm – 300mm)

• 12mm Diameter: Hilti DD-BI 12
  This small core drill bit is used for precision drilling in concrete and masonry, ideal for electrical and plumbing installations where small holes are required. It features Hilti’s proprietary “Turbo Segment” design, which increases the contact area between the diamond segments and the material, resulting in faster cutting. The 12mm diameter bit has a 10mm shank and operates at 1,800 – 3,500 RPM, with Hilti’s integrated water cooling system for efficient heat management.
• 76mm Diameter: Hilti DD-BI 76
  A mid-sized core drill bit, the 76mm diameter is suitable for drilling holes for medium to large pipes, such as drainage pipes and HVAC ducts, in commercial buildings. It features a high-density diamond concentration in the segments, ensuring long life even when drilling through rebar. The bit has a 1 1/4” thread shank, compatible with Hilti’s core drilling rigs, and operates at 500 – 1,200 RPM. The Turbo Segment design also helps in reducing vibration, ensuring a smoother drilling process.
• 300mm Diameter: Hilti DD-BI 300
  One of the largest core drill bits in Hilti’s lineup, the 300mm diameter is designed for mega-construction projects, such as drilling holes for tunnels, large-diameter pipes, or industrial equipment. It features a heavy-duty steel body with reinforced segments that can withstand the extreme pressure of drilling through thick, reinforced concrete. The bit has a 3” thread shank for compatibility with industrial drilling machines and operates at 100 – 300 RPM. It requires a high-flow water cooling system to dissipate heat, and its design includes anti-vibration features to ensure stability during operation.

Model: Hilti TE-CX Diamond Drill Bits (Diameter Range: 5mm – 28mm)

• 5mm Diameter: Hilti TE-CX 5
  This small-diameter bit is ideal for drilling pilot holes in concrete and masonry, used as a starting point for larger holes or for installing small anchors. It features a carbide tip with embedded diamond particles, ensuring sharpness and durability. The 5mm size is commonly used in electrical and plumbing work, where precision is key. The bit has a TE-CX shank, compatible with Hilti’s TE 20 and TE 30 rotary hammers, and operates at 2,000 – 4,000 BPM (blows per minute) with rotational speed of 1,500 – 3,000 RPM.
• 20mm Diameter: Hilti TE-CX 20
  A popular size for general construction, the 20mm bit is used for drilling holes for wall anchors, electrical boxes, and small pipes. It features a flute design that efficiently removes dust and debris, reducing friction and heat buildup. The diamond-enhanced carbide tip ensures fast drilling even in hard concrete with aggregate. The bit has a TE-CX shank and works with Hilti’s mid-range rotary hammers, operating at 1,500 – 3,000 BPM and 1,000 – 2,500 RPM.
• 28mm Diameter: Hilti TE-CX 28
  The largest in the TE-CX series, the 28mm bit is designed for drilling larger holes in concrete and masonry, suitable for installing larger anchors, pipes, or conduit. It features a reinforced tip to handle the higher torque of larger holes and a wear-resistant coating that extends the bit’s life. The bit has a TE-CX shank and is compatible with Hilti’s TE 50 and TE 60 rotary hammers, operating at 1,000 – 2,000 BPM and 800 – 1,800 RPM, with optional water cooling for prolonged use.

4. Makita Diamond Drill Bits

Model: Makita D-64568 Diamond Core Drill Bits (Diameter Range: 16mm – 100mm)

• 16mm Diameter: Makita D-64568-16
  This small core drill bit is ideal for drilling holes for electrical cables, small pipes, and wall anchors in residential construction. It features a sintered diamond segment with a medium diamond concentration, providing a balance between speed and durability. The 16mm diameter bit has a 10mm shank and is compatible with most rotary drills, operating at 1,200 – 3,000 RPM with water cooling.
• 50mm Diameter: Makita D-64568-50
  A mid-sized core drill bit, the 50mm diameter is used for drilling holes for medium-sized pipes, such as water lines and ventilation ducts, in commercial buildings. It features a precision-ground tip to ensure accurate hole placement and a flute design that removes debris efficiently. The diamond segments are designed to withstand the impact of aggregate in concrete, ensuring consistent performance. The bit has a 16mm shank and operates at 800 – 2,000 RPM, with water cooling recommended for optimal results.
• 100mm Diameter: Makita D-64568-100
  The largest in the D-64568 series, the 100mm diameter bit is designed for heavy-duty core drilling in thick concrete and reinforced structures. It is commonly used for installing large pipes, such as sewer lines or industrial ducts. The bit features a thick steel body with reinforced diamond segments that can cut through rebar, and a threaded shank (5/8” – 11 UNC) for compatibility with core drilling machines. It operates at 300 – 800 RPM, with a high-volume water cooling system to prevent overheating.

Model: Makita D-46270 Diamond Tile Drill Bits (Diameter Range: 6mm – 18mm)

• 6mm Diameter: Makita D-46270-6
  This small-diameter tile drill bit is perfect for drilling holes for small fixtures, such as towel hooks and soap dishes, in bathroom and kitchen tiles. It features an electroplated diamond coating with a fine grit, ensuring smooth cutting and minimal damage to delicate surfaces. The 6mm bit has a 6mm shank and is compatible with most cordless drills, operating at 2,500 – 4,000 RPM with light water cooling.
• 12mm Diameter: Makita D-46270-12
  A versatile size for tile drilling, the 12mm bit is used for installing faucet valves, showerheads, and small pipes in tiled walls. It features a tapered tip that reduces pressure on the tile, preventing cracking, and a flute design that removes debris to keep the hole clean. The diamond coating ensures fast cutting, even in hard porcelain tiles. The bit has a 10mm shank and operates at 1,500 – 3,000 RPM, with water cooling recommended.
• 18mm Diameter: Makita D-46270-18
  The largest in the tile drill series, the 18mm bit is designed for drilling larger holes in stone tiles, marble, and granite, commonly used for drain pipes in showers and kitchen sinks. It features a reinforced tip to prevent wandering and a wear-resistant coating that extends the bit’s life. The bit has a 16mm shank and operates at 1,000 – 2,000 RPM, with continuous water cooling to maintain performance.

5. Sandvik Diamond Drill Bits

Model: Sandvik RH600 Series Diamond Core Drill Bits (Diameter Range: 36mm – 150mm)

• 36mm Diameter: Sandvik RH600-36
  This small-diameter core drill bit is used for shallow geological exploration, collecting core samples from soft to medium-hard rock formations. It features a matrix-bonded diamond design, where diamonds are embedded in a tough metal matrix, ensuring long life in abrasive conditions. The 36mm diameter allows for detailed core sampling, and the bit is compatible with Sandvik’s lightweight drilling rigs. It operates at 800 – 1,500 RPM, with water or air cooling depending on the rock type.
• 76mm Diameter: Sandvik RH600-76
  A mid-sized core drill bit in the RH600 series, the 76mm diameter is used for medium-depth exploration in hard rock formations, such as granite and quartzite. It features a high diamond concentration and a wear-resistant matrix, ensuring efficient cutting even in abrasive rocks. The bit has a threaded connection compatible with Sandvik’s core barrels and operates at 500 – 1,000 RPM, with water cooling to manage heat in deep drilling.
• 150mm Diameter: Sandvik RH600-150
  The largest in the RH600 series, the 150mm diameter bit is designed for deep mining exploration and large-scale core sampling in very hard rock formations. It features a robust construction with thick diamond segments and a reinforced steel tube to withstand the high torque and pressure of deep drilling. The bit is compatible with Sandvik’s heavy-duty drilling rigs and operates at 200 – 500 RPM, with a high-pressure water cooling system to prevent overheating and maintain cutting efficiency.

Model: Sandvik CS400 Series Diamond Drill Bits (Diameter Range: 10mm – 50mm)

• 10mm Diameter: Sandvik CS400-10
  This small-diameter bit is used for precision drilling in concrete and rock, ideal for installing anchors and small fasteners in structural elements. It features a sintered diamond tip with a sharp cutting edge, ensuring fast drilling in hard materials. The 10mm bit has a 10mm shank and is compatible with most rotary drills, operating at 1,500 – 3,000 RPM with water cooling.
• 32mm Diameter: Sandvik CS400-32
  A mid-sized bit in the CS400 series, the 32mm diameter is used for drilling holes for medium-sized anchors, pipes, and conduit in construction projects. It features a flute design that efficiently removes debris, reducing friction and extending the bit’s life. The diamond segments are designed to cut through reinforced concrete, making it suitable for commercial and industrial applications. The bit has a 16mm shank and operates at 800 – 2,000 RPM, with water cooling recommended.
• 50mm Diameter: Sandvik CS400-50
  The largest in the CS400 series, the 50mm diameter bit is designed for heavy-duty drilling in thick concrete and rock, used for installing large anchors, foundation bolts, and structural supports. It features a reinforced tip and a wear-resistant matrix, ensuring durability in demanding conditions. The bit has a 20mm shank and is compatible with industrial drills and rotary hammers, operating at 500 – 1,500 RPM with continuous water cooling.

6. Atlas Copco Diamond Drill Bits

Model: Atlas Copco Secoroc Diamond Core Drill Bits (Diameter Range: 48mm – 203mm)

• 48mm Diameter: Atlas Copco Secoroc 48
  This small core drill bit is used for shallow to medium-depth exploration in hard rock, collecting core samples for mineral analysis. It features a proprietary “Matrix Pro” technology, where the diamond matrix is optimized for specific rock types, ensuring maximum cutting efficiency. The 48mm diameter allows for detailed sampling, and the bit is compatible with Atlas Copco’s portable drilling rigs. It operates at 600 – 1,200 RPM, with water cooling to manage heat.
• 101mm Diameter: Atlas Copco Secoroc 101
  A mid-sized core drill bit, the 101mm diameter is used for medium-depth mining exploration in abrasive rock formations, such as sandstone and limestone. It features a high diamond concentration and a segmented design that allows for fast cutting and easy debris removal. The bit has a threaded connection compatible with Atlas Copco’s core barrels and operates at 400 – 800 RPM, with water cooling to prevent overheating.
• 203mm Diameter: Atlas Copco Secoroc 203
  The largest in the Secoroc series, the 203mm diameter bit is designed for deep mining exploration and large-scale core sampling in extremely hard rock, such as gneiss and basalt. It features a heavy-duty construction with thick diamond segments and a reinforced steel body to withstand the extreme conditions of deep drilling. The bit is compatible with Atlas Copco’s industrial drilling rigs and operates at 150 – 400 RPM, with a high-pressure water cooling system and dust suppression for safe operation.

Model: Atlas Copco CombiCutter Diamond Drill Bits (Diameter Range: 12mm – 65mm)

• 12mm Diameter: Atlas Copco CombiCutter 12
  This small-diameter bit is used for drilling holes in concrete and masonry for electrical and plumbing installations. It features a diamond-enhanced carbide tip that ensures fast cutting and long life, even in reinforced concrete. The 12mm bit has a 10mm shank and is compatible with most rotary hammers, operating at 1,500 – 3,000 BPM and 1,000 – 2,500 RPM.
• 38mm Diameter: Atlas Copco CombiCutter 38
  A mid-sized bit in the CombiCutter series, the 38mm diameter is used for drilling holes for medium-sized pipes, anchors, and structural supports in commercial construction. It features a flute design that removes debris efficiently, reducing friction and heat buildup. The diamond segments are designed to cut through rebar, making it suitable for reinforced concrete applications. The bit has a 16mm shank and operates at 1,000 – 2,000 BPM and 800 – 1,800 RPM, with water cooling recommended.
• 65mm Diameter: Atlas Copco CombiCutter 65
  The largest in the CombiCutter series, the 65mm diameter bit is designed for heavy-duty drilling in thick concrete and reinforced structures, used for installing large anchors, foundation bolts, and industrial pipes. It features a reinforced tip and a wear-resistant coating, ensuring durability in demanding conditions. The bit has a 22mm shank and is compatible with Atlas Copco’s heavy-duty rotary hammers, operating at 800 – 1,500 BPM and 500 – 1,200 RPM, with continuous water cooling for optimal performance.

Conclusion