Combination Drill/Thread Mills

Holemaking & Threading
Holemaking & Threading

Designed for combined drilling, threading, thread relief cutting, and chamfering, this unique Harvey Tool product performs four different operations, saving machinists time by minimizing tool changes while preserving valuable room in their tool carousel.

  • Designed for combined drilling, threading, thread relief cutting, and chamfering
  • One cutter for 4 different operations saves time on tool changes and leaves more room in the tool carousel
  • Length of cut includes transition angle, allowing for optional 45° chamfer pass
  • Optimized for cutting non-ferrous materials such as aluminum, unfulfilled plastics, copper, brass, and bronze alloys
  • Recommended for cutting, threading and chamfering though holes
  • 3 flutes to center
  • Cuts internal 60° UN threads
  • 90° included back chamfer
  • Solid carbide
  • CNC ground in the USA   

Advanced Search

THREAD
SIZE
DRILL
DIA.
LOC THREAD
DIA.
DIA. OF
SECONDARY
POINT ANGLE
LENGTH
OF TIP
LENGTH OF
THREAD RELIEF
LENGTH OF
TIP CHAMFER
SHANK DIA. OAL UNCOATED TiB2COATED Add to Cart Default Sort
  D1
+.0005"-.0005"
L2 +.030
-.000
D3 +.0005"/-.0005" D4 L3 L4 L5 D2 L1 TOOL # PRICE TOOL # PRICE
4-40 .0876 .2513 .085 .0356 .0580 .0250 .0247 1/8 2 820616 $107.40 820616-C8 $117.40 00000001
6-32 .1076 .3323 .100 .0475 .0707 .0312 .0284 3/16 2 820622 $110.80 820622-C8 $120.90 00000002
8-32 .1336 .3652 .115 .0735 .0767 .0312 .0284 3/16 2 820628 $118.60 820628-C8 $128.90 00000003
10-24 .1494 .4966 .120 .0760 .0939 .0416 .0345 1/4 2 820634 $124.50 820634-C8 $135.50 00000004
10-32 .1596 .4681 .120 .0995 .0828 .0312 .0284 1/4 2 820636 $124.50 820636-C8 $135.00 00000005
1/4-20 .2013 .7154 .180 .1172 .1168 .0500 .0394 3/8 2-1/2 820644 $148.30 820644-C8 $160.00 00000006
1/4-28 .2152 .7078 .180 .1494 .1016 .0357 .0310 3/8 2-1/2 820646 $148.30 820646-C8 $159.50 00000007
5/16-18 .2584 .8750 .240 .1671 .1372 .0555 .0427 3/8 2-1/2 820654 $162.00 820654-C8 $173.60 00000008
5/16-24 .2719 .8248 .240 .1985 .1224 .0416 .0345 3/8 2-1/2 820656 $182.20 820656-C8 $194.40 00000009
3/8-16 .3141 1.019 .285 .2140 .1592 .0625 .0468 1/2 3 820664 $216.60 820664-C8 $229.80 00000010
7/16-20 .3888 1.154 .335 .3047 .1605 .0500 .0394 1/2 3-1/2 820676 $234.10 820676-C8 $247.90 00000011
1/2-13 .4251 1.279 .350 .3064 .2036 .0769 .0553 5/8 3-1/2 820684 $241.60 820684-C8 $270.90 00000012

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