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These sintered granite core drill bits are engineered for fabricators and installers who need clean, chip-controlled holes in hard stone—day after day, not just on a single job. From 35 mm faucet cutouts in kitchen countertops to precise anchor points on exterior façades, the tool family covers a wide diameter range and multiple connector types so your team can work with one system across grinders, drills, and core machines.
By using a granite-tuned metal bond and tall diamond segments, each granite core drill bit for drilling maintains stable feed, long life, and repeatable hole quality on quartz-rich materials. Whether you are working at the bench or on site, the goal is simple: round holes, fewer repairs, and predictable cost per hole.
•Granite-tuned sintered core drill bit design
These bits use a sintered metal bond optimized for granite and other quartz-rich stones. The segment holds sharp diamonds in place so the bit cuts steadily instead of skating, helping you maintain control on polished surfaces, edges, and corners with fewer micro-chips around fittings and fixtures.
•Wide diameter range: 6–150 mm
One product line covers everything from small pilot holes to large faucet, sink, and duct cutouts. This means fewer different tool families in your shop, less time wasted changing systems, and faster throughput on full countertop or stair runs.
•Segment height options: 10–20 mm
Choose 10 mm segments for standard countertop and light production work, or 20 mm segments when you need extended life in thick stone or high-volume drilling. More usable diamond means longer service intervals and more consistent performance over the life of the bit.
•Multiple connectors for real-world compatibility
Available threads and shanks include M14, M10, 5/8"-11, GAS 1/2, Hex, and triangular shank. This allows you to mount the same sintered core drill bits on angle grinders, hand drills, drill presses, and core drilling machines, reducing the number of adapters and special tools your crews have to carry.
•Wet-drilling ready for granite and hard stone
These bits are built to run wet. Water cools the matrix, carries swarf out of the cut, and helps protect both the tool and the operator by reducing dust. On granite, wet drilling typically delivers cleaner hole edges, fewer chips, and significantly longer bit life compared with dry drilling.
•Designed for cost-per-hole efficiency
Compared with disposable or electroplated options, a sintered core drill bit usually delivers more holes per tool, especially in hard granite. For shops and contractors who track tool spend, this means more predictable cost per hole and fewer emergency tool purchases mid-project.
•Countertop & Vanity Fabricators
Granite countertops, vanities, and bar tops demand clean faucet and accessory holes with minimal edge repair. When drilling 35 mm or similar faucet holes in thick, quartz-rich slabs, tall 10–20 mm segments help maintain a consistent cutting rate and hole geometry across many pieces. Wet drilling clears fines and slurry, protecting the polish and keeping the rim sharp and chip-free.
•Installation Teams & MRO Contractors
On job sites, crews often work with mixed tools: one person has an angle grinder, another a hand drill, and sometimes there is access to a core drilling rig. With M14, 5/8"-11, GAS 1/2, Hex, and triangular shanks available, you can deploy the same stone core drill bit family across this tool mix. That means less time hunting for adapters and fewer compatibility issues when jobs are under time pressure.
•Façade, Stair, and Anchor Drilling
When you drill for mechanical anchors in granite stairs, façades, or cladding panels, roundness and diameter tolerance really matter. A stable sintered segment and wet cooling help the bit stay on line, reduce heat tint, and keep the bore size within tolerance for chemical or mechanical anchors. Predictable performance makes it easier to pass inspections and avoid re-drilling.
•Always prefer wet drilling
Use water whenever possible. It cools the bit, flushes swarf, improves edge quality, and dramatically extends tool life—especially in dense granite. Wet drilling also helps reduce airborne dust.
•Use guides for polished surfaces
On polished countertops or tiles, start with a guide fixture or template to prevent the bit from wandering. Once the rim establishes a groove, feed steadily without forcing.
•Match RPM and feed to diameter
Smaller diameters can run at higher RPM; larger diameters need slower speeds and steadier feed. Avoid aggressive pressure that stalls the tool or overheats the bond.
•Watch for glazing
If you feel the granite core drill bit for drilling starts to burn instead of cut, lift it slightly to allow water and slurry to clear, or dress the segment on a soft abrasive material to expose fresh diamonds.
• Can I run these bits on an angle grinder?
Yes. Use the M14 or 5/8"-11 threaded versions when you want to mount the bit on an angle grinder. For best edge quality in granite, combine a stable grinder speed with wet drilling and a starting guide or template.
• Which segment height should I choose for thick granite?
For frequent or deep holes in thick granite, 20 mm segments typically offer longer service life and more stable cutting. For standard countertop work and medium volumes, 10 mm segments are a cost-effective choice.
• Is wet or dry drilling better on granite?
Wet drilling is strongly recommended. Water cools the bond, carries swarf away, reduces dust, and greatly lowers the risk of chipping or heat damage. Dry drilling should be limited to shallow holes or situations where water is absolutely not possible.
• Will these connectors fit my drill press or core machine?
GAS 1/2, Hex, and triangular shank options are available for many drill presses and hand drills. For dedicated core drilling machines, check your spindle specification and choose the matching connector (for example, GAS 1/2). Always confirm the chuck or adapter before ordering.
• Can I use these bits on other stones besides granite?
Yes. These sintered core drill bits can also work on many types of hard natural and engineered stones. Performance is best on granite and similar materials; if you drill very soft stone or abrasive concrete, ask our team for a bond recommendation.
• What is the MOQ and do you support OEM?
The typical MOQ is 10 pcs per size. As a professional manufacturer and supplier, SENMINE supports OEM services including custom diameter sets, logo printing, color coding, and branded packaging to match your product line.
• Macro rim shots: 10 mm vs 20 mm segment height on the same diameter
• In-use photo: Wet drilling a 35 mm faucet hole in granite (show water ring & slurry)
• Connector lineup: M14, M10, 5/8"-11, GAS 1/2, Hex, triangular shank labeled side-by-side
• Edge quality close-ups: Entry and exit rims on polished granite after wet drilling
Specify your diameter mix and preferred segment height, and we'll configure a set for your workflow. Partner with SENMINE—a trusted manufacturer and supplier for granite drilling solutions. Contact Us to request pricing, samples, or an application review.
These sintered granite core drill bits are engineered for fabricators and installers who need clean, chip-controlled holes in hard stone—day after day, not just on a single job. From 35 mm faucet cutouts in kitchen countertops to precise anchor points on exterior façades, the tool family covers a wide diameter range and multiple connector types so your team can work with one system across grinders, drills, and core machines.
By using a granite-tuned metal bond and tall diamond segments, each granite core drill bit for drilling maintains stable feed, long life, and repeatable hole quality on quartz-rich materials. Whether you are working at the bench or on site, the goal is simple: round holes, fewer repairs, and predictable cost per hole.
•Granite-tuned sintered core drill bit design
These bits use a sintered metal bond optimized for granite and other quartz-rich stones. The segment holds sharp diamonds in place so the bit cuts steadily instead of skating, helping you maintain control on polished surfaces, edges, and corners with fewer micro-chips around fittings and fixtures.
•Wide diameter range: 6–150 mm
One product line covers everything from small pilot holes to large faucet, sink, and duct cutouts. This means fewer different tool families in your shop, less time wasted changing systems, and faster throughput on full countertop or stair runs.
•Segment height options: 10–20 mm
Choose 10 mm segments for standard countertop and light production work, or 20 mm segments when you need extended life in thick stone or high-volume drilling. More usable diamond means longer service intervals and more consistent performance over the life of the bit.
•Multiple connectors for real-world compatibility
Available threads and shanks include M14, M10, 5/8"-11, GAS 1/2, Hex, and triangular shank. This allows you to mount the same sintered core drill bits on angle grinders, hand drills, drill presses, and core drilling machines, reducing the number of adapters and special tools your crews have to carry.
•Wet-drilling ready for granite and hard stone
These bits are built to run wet. Water cools the matrix, carries swarf out of the cut, and helps protect both the tool and the operator by reducing dust. On granite, wet drilling typically delivers cleaner hole edges, fewer chips, and significantly longer bit life compared with dry drilling.
•Designed for cost-per-hole efficiency
Compared with disposable or electroplated options, a sintered core drill bit usually delivers more holes per tool, especially in hard granite. For shops and contractors who track tool spend, this means more predictable cost per hole and fewer emergency tool purchases mid-project.
•Countertop & Vanity Fabricators
Granite countertops, vanities, and bar tops demand clean faucet and accessory holes with minimal edge repair. When drilling 35 mm or similar faucet holes in thick, quartz-rich slabs, tall 10–20 mm segments help maintain a consistent cutting rate and hole geometry across many pieces. Wet drilling clears fines and slurry, protecting the polish and keeping the rim sharp and chip-free.
•Installation Teams & MRO Contractors
On job sites, crews often work with mixed tools: one person has an angle grinder, another a hand drill, and sometimes there is access to a core drilling rig. With M14, 5/8"-11, GAS 1/2, Hex, and triangular shanks available, you can deploy the same stone core drill bit family across this tool mix. That means less time hunting for adapters and fewer compatibility issues when jobs are under time pressure.
•Façade, Stair, and Anchor Drilling
When you drill for mechanical anchors in granite stairs, façades, or cladding panels, roundness and diameter tolerance really matter. A stable sintered segment and wet cooling help the bit stay on line, reduce heat tint, and keep the bore size within tolerance for chemical or mechanical anchors. Predictable performance makes it easier to pass inspections and avoid re-drilling.
•Always prefer wet drilling
Use water whenever possible. It cools the bit, flushes swarf, improves edge quality, and dramatically extends tool life—especially in dense granite. Wet drilling also helps reduce airborne dust.
•Use guides for polished surfaces
On polished countertops or tiles, start with a guide fixture or template to prevent the bit from wandering. Once the rim establishes a groove, feed steadily without forcing.
•Match RPM and feed to diameter
Smaller diameters can run at higher RPM; larger diameters need slower speeds and steadier feed. Avoid aggressive pressure that stalls the tool or overheats the bond.
•Watch for glazing
If you feel the granite core drill bit for drilling starts to burn instead of cut, lift it slightly to allow water and slurry to clear, or dress the segment on a soft abrasive material to expose fresh diamonds.
• Can I run these bits on an angle grinder?
Yes. Use the M14 or 5/8"-11 threaded versions when you want to mount the bit on an angle grinder. For best edge quality in granite, combine a stable grinder speed with wet drilling and a starting guide or template.
• Which segment height should I choose for thick granite?
For frequent or deep holes in thick granite, 20 mm segments typically offer longer service life and more stable cutting. For standard countertop work and medium volumes, 10 mm segments are a cost-effective choice.
• Is wet or dry drilling better on granite?
Wet drilling is strongly recommended. Water cools the bond, carries swarf away, reduces dust, and greatly lowers the risk of chipping or heat damage. Dry drilling should be limited to shallow holes or situations where water is absolutely not possible.
• Will these connectors fit my drill press or core machine?
GAS 1/2, Hex, and triangular shank options are available for many drill presses and hand drills. For dedicated core drilling machines, check your spindle specification and choose the matching connector (for example, GAS 1/2). Always confirm the chuck or adapter before ordering.
• Can I use these bits on other stones besides granite?
Yes. These sintered core drill bits can also work on many types of hard natural and engineered stones. Performance is best on granite and similar materials; if you drill very soft stone or abrasive concrete, ask our team for a bond recommendation.
• What is the MOQ and do you support OEM?
The typical MOQ is 10 pcs per size. As a professional manufacturer and supplier, SENMINE supports OEM services including custom diameter sets, logo printing, color coding, and branded packaging to match your product line.
• Macro rim shots: 10 mm vs 20 mm segment height on the same diameter
• In-use photo: Wet drilling a 35 mm faucet hole in granite (show water ring & slurry)
• Connector lineup: M14, M10, 5/8"-11, GAS 1/2, Hex, triangular shank labeled side-by-side
• Edge quality close-ups: Entry and exit rims on polished granite after wet drilling
Specify your diameter mix and preferred segment height, and we'll configure a set for your workflow. Partner with SENMINE—a trusted manufacturer and supplier for granite drilling solutions. Contact Us to request pricing, samples, or an application review.
