Machine Reamers R303
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)
Lc
L
Through
Blind Hole
HM Carbide Tipped
Steel Cast lron Stainless Steel AL, Copper
Hole
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
6
+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 +0.009/+0.020 +0.012/+0.021
+0.005 +0.007 +0.009 +0.011 +0.013
+0.007 +0.009 +0.011 +0.013 +0.016
+0.009 +0.011 +0.013 +0.015 +0.019
10 18 30 50
10 18 30
Standard Length
Code No. R303-Dc
Dc H7 11 12 13 14 15 17 18 19 22 24 25 26 28 30 32 35 36 38
Lc mm
L mm 175 182 182 189 204 214 219 223 237 268 268 273 277 281 317 321 325 329
d M.T.
Z teeth
R303 Bright
41 44 44 47 50 54 56 58 64 68 68 70 71 73 77 78 79 81
1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4
● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
6 6 6 6 6 6 6 6 6 8 8 8 8 8 8 8 8 8
Please refer to page P494 for parameters. ※ HM series offer valid while stocks last
490
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