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Core Bit Speed - Manufacturing Recommendations

RPM (Rotation Per Minute)

If you're drilling to quickly, you will grind down the segments faster. If you are drilling to slowly, you are affecting the time spent on your project. RPMs are important in making sure that your project stays on budget and with-in a time frame. 

 

 Please follow our guide below for recommended RPMs for wet coring:  

Core Bit Size

Min RPM

Recommended RPM Max RPM
1" 2387 3182 3980
1.25" 1910 2545 3184
1.5" 1592 2121 2653
1 5/8" 1496 1958 2449
2" 1194 1591 1990
2.5" 955 1273 1592
3" 796 1061 1327
3.5" 682 909 1137
4" 597 795 995
4.5" 531 707 884
5" 477 636 798
5.5" 434 579 724
6" 398 530 663
6.5" 367 490 612
7" 341 455 569
8" 298 398 498
9" 265 354 509
10" 239 318 398
11" 208 276 368
12" 199 265 332

 * For larger size core bits, please call for recommended RPMs and speak to one of our specialists. 

There are many factors that can affect your core drilling RPM. These factors can include horsepower of your equipment, whither you cut wet or dry, various types of aggregate, cutting reinforced concrete, bond specs, proper alignment, and core rig maintenance. 

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