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Drill Bit Decimal Size Equivalents
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About Drill Bits
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About Masonry Drill Bits
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Masonry Drill Bits for Drilling Rigs
Use these diamond-coated hollow bits for wet drilling of masonry, concrete, and rebar with a drilling rig. They're not for dry drilling or use with portable electric drills or grinders. The size listed is the bit’s OD.
Adapters let you use your bit on a drilling rig with a different thread size.
Inch Drill Bits
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Size | Decimal Size Equivalent | Bit ID | Overall Lg. | Max. Drilling Dp. | Thread Size | Type | Size | Point Style | For Use On | Each | |
Diamond-Coated Steel | |||||||||||
| 1" | 1" | 3/4" | 15 1/2" | 13" | 5/8"-11 | Threaded Hub | 1" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 1 1/8" | 1.125" | 7/8" | 15 1/2" | 13" | 5/8"-11 | Threaded Hub | 1 1/8" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 00000 |
| 1 1/4" | 1.25" | 1" | 15 1/2" | 13" | 5/8"-11 | Threaded Hub | 1 1/4" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 1 3/8" | 1.375" | 1 1/8" | 15 1/2" | 13" | 5/8"-11 | Threaded Hub | 1 3/8" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 1 1/2" | 1.5" | 1 1/4" | 15 1/2" | 13" | 5/8"-11 | Threaded Hub | 1 1/2" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 1 3/4" | 1.75" | 1 1/2" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 1 3/4" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 2" | 2" | 1 3/4" | 16 1/2" | 14" | 1 1/4"-7 | Threaded Hub | 2" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 2 1/4" | 2.25" | 2" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 2 1/4" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 2 1/2" | 2.5" | 2 1/4" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 2 1/2" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 2 3/4" | 2.75" | 2 1/2" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 2 3/4" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 3" | 3" | 2 3/4" | 16 1/2" | 14" | 1 1/4"-7 | Threaded Hub | 3" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 3 1/2" | 3.5" | 3 1/4" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 3 1/2" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 4" | 4" | 3 3/4" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 4" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 4 1/2" | 4.5" | 4 1/4" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 4 1/2" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 5" | 5" | 4 3/4" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 5" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 6" | 6" | 5 3/4" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 6" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 7" | 7" | 6 3/4" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 7" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 8" | 8" | 7 5/8" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 8" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 10" | 10" | 9 5/8" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 10" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
| 12" | 12" | 11 5/8" | 15 1/2" | 13" | 1 1/4"-7 | Threaded Hub | 12" | Standard | Masonry, Concrete, Reinforced Concrete, Rebar | 0000000 | 000000 |
Thread Adapters
| Overall Lg. | Male Thread Size | Female Thread Size | For Drill Bit Shank Type | Each | |
| 5 3/8" | 5/8"-11 | 1 1/4"-7 | Threaded Hub | 0000000 | 0000000 |
Thread Adapters for Masonry Drill Bits for Drilling Rigs
Adapt a bit for use on a drilling rig with a different thread size.
| Overall Length | Male Thread Size | Female Thread Size | For Drill Bit Shank Type | Each | |
| 5 3/8" | 5/8"-11 | 1 1/4"-7 | Threaded Hub | 0000000 | 0000000 |
Core Drill Bits for Glass and Ceramic
Reduce the chance of chipping and cracking when drilling in glass and ceramic. These hollow bits are diamond-coated for long life and fast cutting. They are for use in drill presses only and require an adapter (sold separately). Attach the threaded nut to the adapter, then install the adapter into the chuck on a drill press. Coolant, such as water, is required when drilling with these bits. The size listed is the bit's OD.
Drill press adapters attach to a water line, which acts as coolant during drilling, and include an on/off valve. Both adapters work with all of these drill bits, but choose the shank size that fits your application.
Inch Drill Bits
| Size | Decimal Size Equivalent | Bit ID | Overall Lg. | Max. Drilling Dp. | Diamond Tip Lg. | Diamond Grit | Recommended Operating Speed, rpm | Each | |
Diamond-Coated Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3/32" | 0.0938" | 0.043" | 3 1/2" | 2" | 1/8" | 100 | 1,800-2,400 | 0000000 | 0000000 |
| 1/8" | 0.125" | 0.075" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 5/32" | 0.1563" | 0.106" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 3/16" | 0.1875" | 0.137" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 7/32" | 0.2188" | 0.169" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 1/4" | 0.25" | 0.2" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 9/32" | 0.2813" | 0.231" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 5/16" | 0.3125" | 0.262" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 3/8" | 0.375" | 0.325" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 7/16" | 0.4375" | 0.387" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 1/2" | 0.5" | 0.446" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 9/16" | 0.5625" | 0.504" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 5/8" | 0.625" | 0.562" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 3/4" | 0.75" | 0.692" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 7/8" | 0.875" | 0.817" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 1" | 1" | 0.94" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 1 1/4" | 1.25" | 1.19" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
