Page 256 - Republic Drill

Combined Tap & Drill

High Speed Steel – Ground Thread

List No. 789 – 2 Flute
Designed to drill and tap thru holes in a single pass up to
THREADING Size Threads Size Thread Overall Price Size Per Inch Drill Thread Overall Price
two times the tap diameter. Also can be used on multiple
spindle heads with reversing mechanisms.
Threads
Drill
Per Inch
Each
Length
Length
Length
Each
Length
Size
4
5/16
.2660
2-27/32
16.50
1-7/8
24.20
.0945
3/8
15/16
18
48
16.50
5/16
24
40
.1040
1-15/16
.2770
13/32
15/16
2-27/32
24.20
5 4 40 .0910 3/8 1-7/8 16.50 1/4 28 .2200 25/32 2-1/2 17.60
6 32 .1115 7/16 2 16.50 3/8 16 .3225 1-1/16 3-3/8 28.60
6 40 .1170 7/16 2 16.50 3/8 24 .3395 1-1/16 3-3/8 28.60
8 32 .1375 1/2 2-1/8 16.50 7/16 14 .3770 1-1/4 3-3/4 36.86
10 24 .1545 5/8 2-3/8 16.50 7/16 20 .3955 1-1/4 3-3/4 36.86
10 32 .1635 5/8 2-3/8 16.50 1/2 13 .4350 1-3/8 4-1/16 42.58
12 24 .1805 21/32 2-3/8 17.60 1/2 20 .4580 1-3/8 4-1/16 42.58
12 28 .1860 21/32 2-3/8 17.60 5/8 11 .5750 1-3/4 5 87.46
1/4 20 .2080 25/32 2-1/2 16.50 3/4 10 .6650 2 6 108.90
Pipe Sizes
Size Threads Drill Thread Overall Price Size Threads Drill Thread Overall Price
Per Inch Size Length Length Each Per Inch Size Length Length Each
1/16 27 .2420 11/16 2-13/16 63.35 1/2 14 .7030 1-3/8 4-3/8 159.12
1/8 27 .3320 3/4 2-7/8 79.89 3/4 14 .9060 1-3/8 4-9/16 222.18
1/4 18 .4370 1-1/16 3-5/16 90.68 1 11-1/2 1.1410 1-3/4 5-3/8 333.30
3/8 18 .5620 1-1/16 3-1/2 104.63
Metric Sizes
List No. 789M – 2 Flute
Drill
Threads
Size Threads Size Thread Overall Price Size Per Inch Drill Thread Overall Price
Length
Each
Each
Length
Size
Per Inch
Length
Length
3.00 .50 .1015 13/32 1-15/16 18.76 6.00 1.00 .2031 25/32 2-1/2 18.76
3.50 .60 .1181 7/16 2 18.76 7.00 1.00 .2420 15/16 2-27/32 18.76
4.00 .70 .1339 1/2 2-1/8 18.76 8.00 1.25 .2735 15/16 2-27/32 18.76
4.50 .75 .1520 7/8 2-3/8 18.76 10.00 1.50 .3445 1-1/16 3-3/8 38.86
5.00 .80 .1695 5/8 2-3/8 18.76 12.00 1.75 .4134 1-3/8 4-1/4 38.86
Cobalt Combined Tap & Drill
List No. 789C – 2 Flute
Designed to drill and tap thru holes in a single pass up to
two times the tap diameter. Also can be used on multiple
spindle heads with reversing mechanisms.
Threads Drill Thread Overall Price Threads Drill Thread Overall Price
Size Size
Per Inch Size Length Length Each Per Inch Size Length Length Each
4 40 .0910 3/8 1-7/8 22.88 1/4 20 .2080 25/32 2-1/2 22.88
4 48 .0945 3/8 1-7/8 24.72 1/4 28 .2200 25/32 2-1/2 22.88
5 40 .1040 13/32 1-15/16 22.88 5/16 18 .2660 15/16 2-27/32 34.08
6 32 .1115 7/16 2 22.88 5/16 24 .2770 15/16 2-27/32 34.08
6 40 .1170 7/16 2 24.72 3/8 16 .3225 1-1/16 3-3/8 41.04
8 32 .1375 1/2 2-1/8 22.88 3/8 24 .3395 1-1/16 3-3/8 41.04
8 36 .1400 1/2 2-1/8 24.88 7/16 14 .3770 1-1/4 3-3/4 49.20
10 24 .1545 5/8 2-3/8 22.88 7/16 20 .3955 1-1/4 3-3/4 49.20
10 32 .1635 5/8 2-3/8 22.88 1/2 13 .4350 1-3/8 4-1/16 55.12
12 24 .1805 21/32 2-3/8 22.88 1/2 20 .4580 1-3/8 4-1/16 55.12
12 28 .1860 21/32 2-3/8 24.72
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