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12 Inch WET Core Bits
Hub 1-1/4"-7 / Standard core length: 13"
Additional length bits may be special ordered on select bits at $8.00 per inch
Recommended RPM for best performance
Minimum RPM
199
Remommended RPM
265
Max RPM
332
12" Contractor Grade Wet Core Bits
Cutters Choice CBGHL12000 General Purpose Bit
Economically designed to handle the miscellaneous jobs that don't require more expensive solutions.
$529.95
CBGH Spec
General Purpose
Moderate Steel
Diamond Products Heavy Duty Orange Bits
Excellent footage and drilling speed. Designed for all types of wet drilling applications with light to moderate steel
$634.40
HOL Spec
General Purpose
Longer Life
Cat # 04853
H33F Spec
Med Aggregate
w/ reinforcement
Cat # 04841
H64L Spec
Asphalt
Block
Cat # 04848
Diamond Products Premium Black Bits
Very high diamond concentration. Premium Black gives maximum footage and drilling speed in all types of drilling applications
$700.00
POL Spec
General Purpose
Longer Life
Cat # 05361
P33F Spec
Med Aggregate
w/ reinforcement
Cat # 05351
P64L Spec
Asphalt
Block
Cat # 05359
12" Professional Grade Wet Core Bits
Diamond Products Great White Bits
The Great White Core Bore bit is designed to "chew a hole" right through concrete with specialized diamond "Shark Tooth" segments. These 0.433" tall pointed segments offer fast coring and long life
$770.00
GWOL Spec
General Purpose
Med Aggregate
Cat # 80106
12" Turbo (Fast-Cut) Wet Core Bits
Diamond Products Heavy Duty Orange Turbo Bits
Very high quality diamonds and longer coring life in medium aggregate concrete with moderate steel Serrated segment for faster coring
$575.60
THOWL Spec
General Purpose
Moderate Steel
Cat # 06882
Diamond Products Premium Black Turbo Bits
Highest quality diamonds and longest coring life in medium aggregate concrete with moderate steel Serrated segment for faster coring
$616.40
TPOWL Spec
General Purpose - Moderate Steel
Cat # 06956

Factors that affect Core Drill Motor
performance and your profit margin

Speed
(RPM) - If the speed is too high the bit will polish. If the speed is too low the job will take too long. You will know if the bit is "Polished" or "Glazed" when it stops cutting, you have segments left, and you don't see exposed diamonds. To open up the diamonds try drilling in soft abrasive material like a cinder block. Be careful to not drill very much as you will be wasting diamonds.
Power
Necessary to maintain the proper cutting speed. Efficient cutting means keeping the bit at the right speed.
Water
Not too little and not too much. The right amount removes slurry and keeps the cut clean. Slurry water should look like "Coffee with cream"
Aggregate
You can't see it until you're done, but a good driller can feel the right speed and pressure to cut varying types of aggregate.
Steel
Slows down the cutting process. Maintaining drill motor speed is important. Don't push the bit too hard. Maintain even speed with even pressure.
Bond Specs
Too hard and it takes too long. Too soft and it costs too much money. Remember Hard bond for cutting soft abrasive materials, soft bond for cutting hard materials. "Hard on hard" won't cut, and "soft on soft" won't last.
Proper Alignment
Necessary for good bit life. This means the rig must be properly anchored. A rig can be anchored with concrete anchors, vacuum or a post jack.
Standing on the rig is DANGEROUS and not acceptable
Core Rig Maintenance
Performance, speed and bit life will mean little if your rig has bad shims, bearing and hold down devices.
Wet Core Bits by Size