Cougar GT Premium Wet Diamond Core Bits for Cured Concrete with Rebar, Masonry & Stone, Sizes 1/2" thru 18", 14" Length
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Cougar GT Premium Wet Diamond Core Bits for Cured Concrete with Rebar, Masonry & Stone, Sizes 1/2" thru 18", 14" Length

Cougar GT Premium Wet Diamond Core Bits for Cured Concrete with Rebar, Masonry & Stone, Sizes 1/2" thru 18", 14" Length

Delta Diamond ProductsSKU: CORWP-0050

Select a Size Below

Price:
$49.77 USD
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Description

Cougar GT Premium Wet Diamond Bits are for drilling cured concrete with medium steel reinforcing as well as brick, block, and various stone materials. Featured is a standard 5/8"-11 or 1-1/4"-7 coarse threaded arbor that will connect to most core drilling machines.

  • Use with hand-held or rig mounted core drilling machines.
  • Features 8MM tall diamond segments for optimum drilling life.
  • Use for rotary drilling only. Not for use with roto-hammers or hammer drills.
  • Cougar GT Premium Wet Bits have a 14" drilling depth capacity before adding extensions.

Diamond Core Bit Recommended RPM

 Core Bit Size Rec. Min RPM Rec. RPM Rec. Max RPM
1 Inch 2380 3180 3980
2 Inch 1190 1590 1990
3 Inch 790 1060 1320
4 Inch 590 790 990
5 Inch 477 636 790
6 Inch 390 560 660
7 Inch 340 450 560
8 Inch 290 390 500
9 Inch 260 350 490
10 Inch 230 310 400
12 Inch 200 260 330
14 Inch 170 220 280
16 Inch 150 200 250

 

How to find the right RPM
Start off with the recommended RPM on the table you see above. From there, you will need to adjust to different variables. Different types of aggregate will need different speed, pressure, water, etc. A good operator will be able to feel the right speed and pressure to use. It takes skill and experience to tell.

If the drilling speed is too high, the bit will glaze over the diamonds preventing it from drilling.

If its too low, the drilling will take far too long.

Adjust accordingly.

If you do find the bit is glazed over, but there is still segment left, take the bit out of the hole and drill into some soft, abrasive cinder block to open up new diamonds.

For drilling through rebar, do not apply additional pressure. Apply the same amount of of pressure and do not force the bit into the drill.

Any questions or comments please feel free to call us at 800-618-5000. 

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