NC Machine Reamers R308
Designed with left helix and right cutting flutes with unequal flute design. Downward chip evacuation. Application for reaming different steels below 48HRC, stainless steel, cast iron, aluminium, copper…and etc. Accuracy tolerance: H7 (m5) 0/+0.004mm
a
45°
Lc
L1
L
Through
Blind Hole
Steel Cast lron Stainless Steel AL, Copper
Hole
VHM Carbide
Uncoated Bright
L 7°
Z
Tolerance regulation
P H M K N
Dc size (mm)
Reamer Dc tolerance (mm)
Grind Dc tolerance (mm)
Above
Under
m5(JIS)
H7(DIN 1420)
Min
Mid
Max
-
3 6
+0.002/+0.006 +0.004/+0.008 +0.004/+0.009 +0.005/+0.010 +0.006/+0.012 +0.006/+0.012 +0.007/+0.015 +0.008/+0.015 +0.008/+0.017 +0.009/+0.017
+0.004 +0.005 +0.007 +0.009 +0.011
+0.005 +0.007 +0.009 +0.011 +0.013
+0.006 +0.009 +0.011 +0.013 +0.015
3 6
10 18 30
10 18
Standard Length (Dc=d)
Code No. R308-Dc
Lc mm
L1 mm
L mm
a mm
Z teeth
R308 Bright
Dc mm 0.98 0.99
Tolerance mm 0/+0.004 0/+0.004
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6 6 6 6 6 6 7 7 7 8 8 8 8 8 8 8 9 9
15 15 15 15 15 15 16 16 16 18 18 18 18 18 18 18 20 20 22 22 24 24 24 24 24 24 24 25 25 29 29 29 29 29 29 29
34 34 34 34 34 34 36 36 36 40 40 40 40 40 40 40 43 43 46 46 49 49 49 49 49 49 49 53 53 57 57 57 57 57 57 57
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
1
H7
1.01 1.02 1.03
0/+0.004 0/+0.004 0/+0.004
1.1 1.2 1.3 1.4
H7 H7 H7 H7
0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
1.48 1.49
0/+0.004 0/+0.004
1.5
H7
1.51 1.52 1.53
0/+0.004 0/+0.004 0/+0.004
1.6 1.7 1.8 1.9
H7 H7 H7 H7
0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2
10 10 11 11 11 11 11 11 11 12 12 14 14 14 14 14 14 14
1.98 1.99
0/+0.004 0/+0.004
2
H7
2.01 2.02 2.03
0/+0.004 0/+0.004 0/+0.004
2.1 2.2 2.3 2.4
H7 H7 H7 H7
0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25
2.48 2.49
0/+0.004 0/+0.004
2.5
H7
2.51 2.52 2.53
0/+0.004 0/+0.004 0/+0.004
473
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