Core Drill Bit (Guest)

core drill hole size to pipe size chart

The table below depicts the typical core drill bit hole size needed for each specified size of pipe in PVC and Black iron pipes. The type you normally see and associate with construction and utilities like plumbing, fire sprinkler lines, electrical conduits, HVAC, irrigation pipes, and other similar type construction projects when having to core drill through a brick, concrete, cement wall or floor in North Carolina.

Why This Chart was Made?

Sleeves for pipes!

For the purpose of this table the pipe size is the sleeve Size. The matching core drill hole size is for the sleeve!

Alot of times a penetration, as core drill holes are sometimes named, the pipe will require a sleeve, ironically made of the same type pipe just larger than the pipe that is being installed to fulfilled whatever purpose it is being installed for.

Under normal circumstances, most schedule 40, and schedule 80, sizes of pipes fit into the next upper size pipe as the pipe size increases in diameter. In other words, the (O.D) outside dimension is slightly smaller than the (I.D) inside dimension of the next size pipe.

Please notice that some pipe sizes do not fit this parameter.

EXAMPLE: 1 1/4 inch pipe does not fit into a 1 1/2 inch pipe.


Schedule 40 Dimensions

Nom. Pipe (sleeve) Size (in) O.D. Average I.D. Min. Wall Nom. Wt./Ft. Max. W.P. PSI* Core Drill Hole Size
1/8" 0.405 0.249 0.068 0.051 810 1/2"
1/4" 0.540 0.344 0.088 0.086 780 3/4"
3/8" 0.675 0.473 0.091 0.115 620 3/4"
1/2" 0.840 0.602 0.109 0.170 600 1"
3/4" 1.050 0.804 0.113 0.226 480 1 1/4"
1" 1.315 1.029 0.133 0.333 450 1 1/2"
1-1/4" 1.660 1.360 0.140 0.450 370 2"
1-1/2" 1.900 1.590 0.145 0.537 330 2"
2" 2.375 2.047 0.154 0.720 280 2 1/2"
2-1/2" 2.875 2.445 0.203 1.136 300 3"
3" 3.500 3.042 0.216 1.488 260 4"
3-1/2" 4.000 3.521 0.226 1.789 240 4 1/2"
4" 4.500 3.998 0.237 2.118 220 5"
5" 5.563 5.016 0.258 2.874 190 6"
6" 6.625 6.031 0.280 3.733 180 7"
8" 8.625 7.942 0.322 5.619 160 9"
10" 10.750 9.976 0.365 7.966 140 12"
12" 12.750 11.889 0.406 10.534 130 14"


Schedule 80 Dimensions

Nom. Pipe Size (in) O.D. Average I.D. Min. Wall Nom. Wt./Ft. Max. W.P. PSI* Core Drill Hole Size
1/8" .405 .195 0.095 0.063 1230 1/2"
1/4" .540 .282 0.119 0.105 1130 3/4"
3/8" .675 .403 0.126 0.146 920 3/4"
1/2" .840 .526 0.147 0.213 850 1"
3/4" 1.050 .722 0.154 0.289 690 1 1/4"
1" 1.315 .936 0.179 0.424 630 1 1/2"
1-1/4" 1.660 1.255 0.191 0.586 520 2"
1-1/2" 1.900 1.476 0.200 0.711 470 2"
2" 2.375 1.913 0.218 0.984 400 2 1/2"
2-1/2" 2.875 2.290 0.276 1.500 420 3"
3" 3.500 2.864 0.300 2.010 370 4"
3-1/2" 4.000 3.326 0.318 2.452 350 4 1/2"
4" 4.500 3.786 0.337 2.938 320 5"
5" 5.563 4.768 0.375 4.078 290 6"
6" 6.625 5.709 0.432 5.610 280 7"
8" 8.625 7.565 0.500 8.522 250 9"
10" 10.750 9.493 0.593 12.635 230 12"
12" 12.750 11.294 0.687 17.384 230 14"

Posted 2020-08-13

Sleeves size for core drilling Picture 1

Sleeves size for core drilling


services Hole chart - $1

Sometime's we starting a project it is easier to get confused when talking to contractors about the sizes of holes they need core drilled through the walls or f...

Posted 2020-05-27

size of core drill hole for pipe Picture 1

size of core drill hole for pipe


products Hole chart - $1

Often when we core drill hole in walls or floors in one of the towns in North Carolina, such as Charlotte, NC or Raleigh NC, or Winston Salem NC, or Greensboro ...