CUTTING TOOLS Tap Drill Data Technical Information - Tap Drill Data Drill sizes given are to produce approximately 75% basic thread engagement Size 0 - 80 1 - 64 72 2 - 56 64 3 - 48 56 4 - 32 36 40 48 5 - 40 44 6 - 32 36 40 8 - 32 36 40 10 - 24 28 32 12 - 24 28 32 1/4 - 20 24 28 TAP DRILL 3/64 #53 #53 #50 #50 #47 #45 #45 #44 #43 #42 #38 #37 #36 #34 #33 #29 #29 #28 #25 #23 #21 #16 #14 #13 #7 #4 #3 Size 32 5/16 - 18 20 24 32 3/8 - 16 20 24 32 7/16 - 14 20 24 28 1/2 - 12 13 20 24 28 9/16 - 12 18 24 5/8 - 11 12 18 24 11/16 - 11 12 16 TAP DRILL 7/32 F 17/64 I 9/32 5/16 21/64 Q 11/32 U 25/64 X Y 27/64 27/64 29/64 29/64 15/32 31/64 33/64 33/64 17/32 35/64 37/64 37/64 19/32 39/64 5/8 Size 24 3/4 - 10 12 16 20 13/16 - 12 16 20 7/8 - 9 12 14 16 18 20 15/16 - 12 16 20 1-8 12 14 16 20 1-1/16 - 12 16 18 1 - 1/8 - 7 8 12 TAP DRILL 41/64 21/32 43/64 11/16 45/64 47/64 3/4 49/64 49/64 51/64 13/16 13/16 53/64 53/64 55/64 7/8 57/64 7/8 59/64 15/16 15/16 61/64 63/64 1 1 63/64 1 1/3/64 Size 16 18 1 - 3/16 - 12 16 18 1 - 1/4 - 7 8 12 16 18 1 - 5/16 - 12 16 18 1 - 3/8 - 6 8 1 - 3/8 - 12 16 18 1 - 7/16 - 12 16 18 1 - 1/2 - 6 8 12 16 18 1 - 9/16 - 16 18 TAP DRILL 1 - 1/16 1 - 1/16 1 - 7/64 1 - 1/8 1 - 1/8 1 - 7/64 1 - 1/8 1 - 11/64 1 - 3/16 1 - 3/16 1 - 15/64 1 - 1/4 1 - 1/4 1 - 7/32 1 - 1/4 1 - 19/64 1 - 5/16 1 - 5/16 1 - 23/64 1 - 3/8 1 - 3/8 1 - 11/32 1 - 3/8 1 - 27/64 1 - 7/16 1 - 7/16 1 - 1/2 1 - 1/2 Size 1 - 5/8 - 6 8 12 16 18 1 - 11/16 - 16 18 1-3/4-5 8 12 16 1 - 13/16 - 16 1-7/8-8 12 16 1 - 15/16 - 16 2 - 4 - 1/2 8 12 16 2 - 1/16 - 16 2 - 1/8 - 8 12 16 2 - 3/16 - 16 2 - 1/4-4 - 1/2 8 12 TAP DRILL 1-15/32 1-1/02 1-35/64 1-9/16 1-9/16 1-5/08 1-5/08 1-9/16 1-5/08 1-43/64 1-11/16 1-3/04 1-3/04 1-51/64 1-11/16 1-3/4 1-25/32 1-7/8 1-59/64 1-15/16 2 2 2-3/64 2-1/16 2-1/8 2-1/32 2-1/8 2-11/64 Size 16 2 - 5/16 - 16 2 - 3/8 - 12 16 2 - 7/16 - 16 2 - 1/2 - 4 8 12 16 2 - 5/8 - 12 16 2 - 3/4 - 4 8 12 16 2 - 7/8 - 12 16 3-4 8 12 16 16 3 - 1/4 - 4 16 TAP DRILL 2 - 3/16 2 - 1/4 2 - 19/64 2 - 5/16 2 - 3/8 2 - 1/4 2 - 3/8 2 - 27/64 2 - 7/16 2 - 35/64 2 - 9/16 2 - 1/2 5 - 5/8 2 - 43/64 2 - 11/16 2 - 51/64 2 - 13/16 2 - 3/4 2 - 7/8 2 - 59/64 2 - 15/16 3 - 1/16 3 3 - 3/16 - Formula for obtaining Tap Drill Sizes Standard Hand Tips DRILLED HOLE SIZE = MAJOR DIAMETER OF THREAD Percentage of Full Thread for other Drill Sizes PERCENTAGE FULL THREAD = (# OF THREADS PER INCH) X Thread Forming Taps DRILL HOLE SIZE = BASIC DIAMETER OF THREAD (INCHES) [ .01299 X AMOUNT OF PERCENTAGE OF FULL THREAD # OF THREADS PER INCH ] ] ] [ - MAJOR DIAMETER OF THREAD - SELECTED DRILL DIAMETER 0.01299 PERCENTAGE OF FULL THREAD # OF THREADS PER INCH [ .0068 X ] DRILL HOLE SIZE = BASIC MAJOR DIA. OF THREAD (INCHES) [ .0068 X PERCENTAGE OF FULL THREAD X mm PITCH 147.06 NOTE: Drill size should be smaller than hole size by the probable amount the drill will cut oversize. METRIC TAP SIZES TAP M1.6 x 0.35 M1.8 x 0.35 M2 x 0.40 M2.2 x 0.45 M2.5 x 0.45 M3 x 0.50 M3.5 x 0.60 M4 x 0.70 M4.5 x 0.75 M5 x 0.80 M6 x 1 M7 x 1 M8 x 1.25 TAP DRILL 1.25mm 1.45mm 1.60mm 1.75mm 2.05mm 2.50mm 2.90mm 3.30mm 3.75mm 4.20mm 5.00mm 6.00mm 6.75mm TAP M8 x 1 M10 x 1.50 M10 x 1.25 M12 x 1.75 M12 x 1.25 M14 x 2 M14 x 1.50 M16 x 2 M16 x 1.50 M18 x 1.50 M20 x 2.50 M20 x 1.50 M22 x 2.50 TAP DRILL 7.00mm 8.50mm 8.75mm 13/32 27/64 12.0mm 12.5mm 14.0mm 14.5mm 16.5mm 17.5mm 18.5mm 19.5mm TAP M22 M24 M24 M27 M27 M30 M30 M33 M33 M36 M36 M39 M39 x x x x x x x x x x x x x 1.5 3 2 3 2 3.5 2 3.5 2 4 3 4 3 TAP DRILL 20.5mm 21.0mm 22.0mm 24.0mm 25.0mm 26.5mm 28.0mm 29.5mm 31.0mm 32.0mm 1-19/64 1-3/8 36.0mm TAP SIZE 1/16 1/8 1/4 3/8 1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 PIPE TAP DRILL SIZES NPT TAP DRILL D Q 7/16 9/16 45/64 29/32 1-9/64 1-31/64 1-47/64 2-13/64 2-5/8 NPT DEC. EQV. 0.2460 .03320 0.4375 0.5625 0.7031 0.9062 1.1406 1.4844 1.7344 2.2031 2.6250 - For Tapping without reaming NPS STRAIGHT NPS STRAIGHT DEC. EQV. TAP DRILL 1/4 11/32 7/16 37/64 23/32 59/64 1-5/32 1-1/2 1-3/4 2-7/32 2-21/32 0.2500 0.3438 0.4375 0.5781 0.7188 0.9219 1.1562 1.5000 1.7500 2.2188 2.6562 NPTF NPTF TAP DRILL DEC. EQV. D R 7/16 37/64 45/64 59/64 1-5/32 1-1/2 1-47/64 2-7/32 2-41/64 0.2460 0.3390 0.4375 0.5781 0.7031 0.9219 1.1562 1.5000 1.7344 2.2188 2.6406 * Not responsible for typographical errors. 110 PHONE TOLL-FREE FAX 866-795-2424 586-795-2553 

© E&R Industrial. 2007-2011. All Rights Reserved.	Home | Contact | Help
Prices are subject to change per manufacturer and availability.