• NC Machine Reamers
R391 7 Leaders

NC Machine Reamers

  • 4&6 Flute Straight Shank Chucking Reamers
  • Provide superior wear resistance.
  • Can withstand the highest cutting temperatures in low tensile and highly abrasive materials such as Bronze, Copper, Rubber, Aluminium, Cast Iron, and Steel…etc.
Steel < 48HRC
P H M K N S
Uncoated Bright
Helix Angle_0
Flute_reamer
Work Material
P H M K N S
GR1 GR2 GR3 GR4 GR5 GR6 GR7 GR8 GR9 GR10 GR11 GR12 GR13 GR14 GR15 GR16 GR17
Carbon Steel <24HRC
Low-alloyed Steel
<30HRC
Hi-Alloyed Steel
30~38HRC
Hardened Steel
38~48HRC
Hardened Steel
48~56HRC
Hardened Steel
56~68HRC
Hardened Steel
Stainless Steel Cast Iron Aluminium Copper Plastics FRP CFRP Composite Material Graphite Titanium Nickel High Temp Alloys
Product Specification
  • Dc 1/32"~1/2"
  • Dc #60~#31
  • Dc #30~#1
  • Dc A~Z
DC Dec. Equiv. Lc L d Z
H7 Inch Inch Inch Inch teeth
1/32 0.0313 1/4 1-1/2 0.0260 4
3/64 0.0469 3/8 1-1/2 0.0410 4
1/16 0.0625 3/8 1-1/2 0.0520 4
5/64 0.0781 1/2 1-3/4 0.0625 4
3/32 0.0938 1/2 2 0.0781 4
7/64 0.1094 5/8 2-1/4 0.0938 4
1/8 0.1250 5/8 2-1/4 0.1094 4
9/64 0.1406 3/4 2-1/2 0.1250 4
5/32 0.1562 3/4 2-1/2 0.1406 4
11/64 0.1719 7/8 2-3/4 0.1562 4
3/16 0.1875 7/8 2-3/4 0.1719 4
13/64 0.2031 1 3 0.1875 4
7/32 0.2188 1 3 0.1875 4
15/64 0.2344 1 3 0.2188 4
1/4 0.2500 1 3 0.2188 4
17/64 0.2656 1-1/8 3-1/4 0.2500 6
9/32 0.2812 1-1/8 3-1/4 0.2500 6
19/64 0.2969 1-1/8 3-1/4 0.2812 6
5/16 0.3125 1-1/8 3-1/4 0.2812 6
21/64 0.3281 1-1/4 3-1/2 0.3125 6
11/32 0.3438 1-1/4 3-1/2 0.3125 6
23/64 0.3594 1-1/4 3-1/2 0.3125 6
3/8 0.3750 1-1/4 3-1/2 0.3594 6
25/64 0.3906 1-1/4 3-1/2 0.3750 6
13/32 0.4062 1-1/4 3-1/2 0.3750 6
27/64 0.4219 1-3/8 4 0.3750 6
7/16 0.4375 1-3/8 4 0.3750 6
29/64 0.4531 1-3/8 4 0.4375 6
15/32 0.4688 1-3/8 4 0.4375 6
31/64 0.4844 1-1/2 4 0.4375 6
1/2 0.5000 1-1/2 4 0.4375 6
DC Dec. Equiv. Lc L d Z
H7 Inch Inch Inch Inch teeth
#60 0.0400 1/4 1-1/2 0.0360 4
#59 0.0410 1/4 1-1/2 0.0360 4
#58 0.0420 3/8 1-1/2 0.0380 4
#57 0.0430 3/8 1-1/2 0.0380 4
#56 0.0465 3/8 1-1/2 0.0410 4
#55 0.0520 3/8 1-1/2 0.0410 4
#54 0.0550 3/8 1-1/2 0.0520 4
#53 0.0595 3/8 1-1/2 0.0520 4
#52 0.0635 3/8 1-1/2 0.0520 4
#51 0.0670 1/2 1-3/4 0.0625 4
#50 0.0700 1/2 1-3/4 0.0625 4
#49 0.0730 1/2 1-3/4 0.0625 4
#48 0.0760 1/2 1-3/4 0.0625 4
#47 0.0785 1/2 1-3/4 0.0625 4
#46 0.0810 1/2 1-3/4 0.0625 4
#45 0.0820 1/2 2 0.0781 4
#44 0.0860 1/2 2 0.0781 4
#43 0.0890 1/2 2 0.0781 4
#42 0.0935 1/2 2 0.0781 4
#41 0.0960 1/2 2 0.0781 4
#40 0.0980 5/8 2-1/4 0.0938 4
#39 0.0995 5/8 2-1/4 0.0938 4
#38 0.1015 5/8 2-1/4 0.0938 4
#37 0.1040 5/8 2-1/4 0.0938 4
#36 0.1065 5/8 2-1/4 0.0938 4
#35 0.1100 5/8 2-1/4 0.0938 4
#34 0.1110 5/8 2-1/4 0.0938 4
#33 0.1130 5/8 2-1/4 0.0938 4
#32 0.1160 5/8 2-1/4 0.1094 4
#31 0.1200 5/8 2-1/4 0.1094 4
DC Dec. Equiv. Lc L d Z
H7 Inch Inch Inch Inch teeth
#30 0.1285 5/8 2-1/4 0.1094 4
#29 0.1360 3/4 2-1/2 0.1250 4
#28 0.1405 3/4 2-1/2 0.1250 4
#27 0.1440 3/4 2-1/2 0.1250 4
#26 0.1470 3/4 2-1/2 0.1406 4
#25 0.1495 3/4 2-1/2 0.1406 4
#24 0.1520 3/4 2-1/2 0.1406 4
#23 0.1540 3/4 2-1/2 0.1406 4
#22 0.1570 3/4 2-1/2 0.1406 4
#21 0.1590 3/4 2-1/2 0.1406 4
#20 0.1610 7/8 2-3/4 0.1562 4
#19 0.1660 7/8 2-3/4 0.1562 4
#18 0.1695 7/8 2-3/4 0.1562 4
#17 0.1730 7/8 2-3/4 0.1562 4
#16 0.1770 7/8 2-3/4 0.1719 4
#15 0.1800 7/8 2-3/4 0.1719 4
#14 0.1820 7/8 2-3/4 0.1719 4
#13 0.1850 7/8 2-3/4 0.1719 4
#12 0.1890 7/8 2-3/4 0.1719 4
#11 0.1910 7/8 2-3/4 0.1719 4
#10 0.1935 1 3 0.1875 4
#9 0.1960 1 3 0.1875 4
#8 0.1990 1 3 0.1875 4
#7 0.2010 1 3 0.1875 4
#6 0.2040 1 3 0.1875 4
#5 0.2055 1 3 0.1875 4
#4 0.2090 1 3 0.1875 4
#3 0.2130 1 3 0.1875 4
#2 0.2210 1 3 0.1875 4
#1 0.2280 1 3 0.2188 4
DC Dec. Equiv. Lc L d Z
H7 Inch Inch Inch Inch teeth
A 0.2340 1 3 0.2188 4
B 0.2380 1 3 0.2188 4
C 0.2420 1 3 0.2188 4
D 0.2460 1 3 0.2188 4
E 0.2500 1 3 0.2188 4
F 0.2570 1-1/8 3-1/4 0.2500 6
G 0.2610 1-1/8 3-1/4 0.2500 6
H 0.2660 1-1/8 3-1/4 0.2500 6
I 0.2720 1-1/8 3-1/4 0.2500 6
J 0.2770 1-1/8 3-1/4 0.2500 6
K 0.2810 1-1/8 3-1/4 0.2500 6
L 0.2900 1-1/8 3-1/4 0.2812 6
M 0.2950 1-1/8 3-1/4 0.2812 6
N 0.3020 1-1/8 3-1/4 0.2812 6
O 0.3160 1-1/8 3-1/4 0.2812 6
P 0.3230 1-1/4 3-1/2 0.3125 6
Q 0.3320 1-1/4 3-1/2 0.3125 6
R 0.3390 1-1/4 3-1/2 0.3125 6
S 0.3480 1-1/4 3-1/2 0.3125 6
T 0.3580 1-1/4 3-1/2 0.3125 6
U 0.3680 1-1/4 3-1/2 0.3594 6
V 0.3770 1-1/4 3-1/2 0.3594 6
W 0.3860 1-1/4 3-1/2 0.3594 6
X 0.3970 1-1/4 3-1/2 0.3750 6
Y 0.4040 1-1/4 3-1/2 0.3750 6
Z 0.4130 1-1/4 3-1/2 0.3750 6