CNC BLIND HOLE CORE BIT 3/4 INCH 1/2 GAS THREAD

CNC BLIND HOLE CORE BIT 3/4 INCH 1/2 GAS THREAD

The APEXX 3/4" CNC Non-Core Blind-Hole Bit is engineered for precision blind-hole drilling in granite and engineered stone on standard 1/2" gas thread CNC machines. With a 20mm diamond diameter, this bit produces the larger-diameter blind holes commonly required for sink-clip anchors, faucet hardware, and undermount sink installation.The medium-soft metal bond delivers an optimal balance of cutting speed and tool life — fast enough to keep cycle times tight on production runs, durable enough to hold up across multiple jobs without premature segment wear. Wet-use only operation manages heat at the cutting face and extends the working life of the bit on hard, abrasive materials.This is the largest diameter offered in the APEXX CNC blind-hole bit family, making it the right choice when you need a clean, deep, large-diameter recess that smaller bits can't produce in a single pass.

Key Features

3/4" (20mm) diamond diameter — ideal for larger sink hardware and anchor applications
Standard 1/2" gas thread — drops into Italian-built and most domestic CNC spindles without an adapter
Medium-soft metal bond — balances drilling speed and segment life on hard stone
Non-core (blind-hole) design — drills a flat-bottom recess, not a through-hole
Wet use only — water cooling required for performance and tool life

Specifications

Diamond diameter: 3/4" (20mm)
Drilling depth: 1-3/8"
Thread: 1/2" gas (standard right-hand)
Material compatibility: engineered stone (quartz), granite
Operation: wet use only
Brand: APEXX by Ocean Diamond
Manufacturer part number: 23501-01002

Best For

Stone fabrication shops running CNC blind-hole drilling for sink-clip installation, faucet hardware mounting, and other anchor-recess applications on granite and engineered quartz countertops.