7Leaders

Machine Reamers R301

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)

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

Code No. R301-Dc

Dc H7

Lc mm

L1 mm

L mm

d mm

a mm

Z teeth

R301 Bright

1

● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

6 8

15 18 24 29 36 41 44 48 53 58 58 64 70 70 76 76 82 82 88 97

34 40 49 57 61 70 75 80 86 93 93

1

0.1

4 4 4 4 4 4 4 4 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6

1.5

1.5

0.15

2

11 14 15 18 19 21 23 26 26 28 31 31 33 33 36 36 38 41 44 47 52

2

0.2

2.5

2.5

0.25

3

3

0.3 0.3 0.4 0.4 0.5 0.5 0.5 0.6 0.6 0.6 0.6 0.8 0.8 0.8 0.8 1.0 1.0 1.0 1.0

3.5

3.5

4

4

4.5

4.5

5

5

5.5

5.5

6

6

6.5

101 109 109 117 117 125 125 133 142 151 160 170

6.5

7

7

7.5

7.5

8

8

8.5

8.5

9

9

9.5

9.5

10 11 12 14 16

10 11 12 14 16

106 111 121

Please refer to page P494 for parameters.

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