Countertop Openings
Faucet, cable and installation holes where diameter, drilling depth, access and edge quality must be confirmed before tool selection.
OEM Manufacturer & Supplier
Vacuum Brazed Diamond Core Drill Bits for Granite
Manufacturer-direct vacuum brazed core bits for dry or wet drilling of granite, quartz, marble and engineered stone countertops, with custom diameters, M14 or 5/8-11 threads.
Stone Applications
Match an OEM granite core drill to the stone, opening and machine.
Granite, Quartz & Marble
Application review covers the exact natural or engineered stone, slab thickness and expected drilling frequency.
Manufacturer-Direct Distributor Programs
Market-specific diameter sets, M14 or 5/8-11 connections, product marking, labels, cases and export cartons. Broader drawing-based projects can use our custom diamond tool OEM service.
Typical Selection Range
Reference sizes for a granite drilling RFQ.
DiameterConnectionWorking LengthWorking ModeTypical Opening
14–25 mmM14 / 5/8-1140–60 mmDry or wetSmall fixture / cable
28–38 mmM14 / 5/8-1145–65 mmApplication matchedFaucet / plumbing
40–68 mmM14 / 5/8-1150–70 mmApplication matchedCountertop installation
75–120 mmThread / custom60–90 mmApplication matchedLarge service opening
Custom setBuyer standardCustomDry or wetPrivate-label range
Reference dimensions are starting points only. Final diameter, connection, working length, grit and operating recommendation are confirmed against the stone, machine and hole requirement.
Supply Configurations
Common formats for stone fabricators and distributors.
M14 Angle-Grinder Core Drill Bit
Threaded dry or wet drilling configuration for granite countertop and stone fabrication programs using region-compatible angle grinders.
North American Thread Option
Connection and size assortment can be reviewed for North American stone fabrication and distribution requirements.
Distributor Core Drill Set
Custom diameter combinations with product marking, barcode, insert, case, color box and export packaging.
Buyer Questions
Details that affect granite drilling performance.
Connection
Should the tool use M14 or 5/8-11?
M14 is common for angle grinders in many markets, while 5/8-11 is common in North America. Confirm the machine spindle and destination market before ordering.Material
Can one model cover granite and engineered stone?
A vacuum brazed configuration may cover granite, quartz, marble and engineered stone, but material hardness, slab thickness, hole depth and operating condition should be reviewed.RFQ
What produces a useful quotation?
Provide stone type, diameter range, drilling depth, connection, machine speed, dry or wet preference, quantity, target market and any branding or packaging request.Granite Core Drill Inquiry