GUHRING - Навигатор по режимам резания - 2010 EN
для размещения заказа - guhring@guhring-tools.ru
Reaming tools
Manufacturing tolerances to DIN 1420 (complete range see
Guhring catalogue)
Tolerance zones H6…H12 to DIN 1420
(permissible upper and lower tolerances on nominal reamer d1 in µm)
our standard manufacturing tolerance
range for hole tolerance zone
mm H6 H7 H8 H9 H10 H11 H12
>1…....3 + 5 + 8 +11 +21 + 34 + 51 + 85
>3…....6 + 2 + 4 + 6 +12 + 20 + 30 + 50
>6…..10 + 6 +10 +15 +25 + 40 + 63 +102
>10…..18 + 3 + 5 + 8 +14 + 23 + 36 + 60
>18…..30 + 7 +12 +18 +30 + 49 + 76 +127
>30…..50 + 3 + 6 +10 +17 + 28 + 44 + 74
>50…..80 + 9 +15 +22 +36 + 59 + 93 +153
>80…120 + 5 + 8 +12 +20 + 34 + 54 + 90
+11 +17 +28 +44 + 71 +110 +178
+ 6 + 9 +16 +25 + 41 + 64 +104
+13 +21 +33 +52 + 85 +136 +212
+ 7 +12 +19 +30 + 50 + 80 +124
+16 +25 +39 +62 +102 +161 +255
+ 9 +14 +22 +36 + 60 + 94 +150
+18 +29 +45 +73 +119 +187 +297
+10 +16 +26 +42 + 70 +110 +174
Stock allowance (reaming dim.) of holes
(recommended values in mm)
stock allowance on hole diameter
material 6 10 16 25 > 25
steels up to 700 MPa 0.1 - 0.2 0.2 0.2 - 0.3 0.3 - 0.4 0.4 - 0.5
steels 700-1000 MPa 0.1 - 0.2 0.2 0.2 0.3 0.3 - 0.4
cast steel 0.1 - 0.2 0.2 0.2 0.2 - 0.3 0.3 - 0.4
grey cast iron 0.1 - 0.2 0.2 0.2 - 0.3 0.3 - 0.4 0.4 - 0.5
malleable cast iron 0.1 - 0.2 0.2
0.3 0.4 0.5
copper 0.1 - 0.2 0.2 - 0.3 0.3 - 0.4 0.4 - 0.5 0.5
brass, bronze 0.1 - 0.2 0.2 0.2 - 0.3 0.3 0.3 - 0.4
light alloys 0.1 - 0.2 0.3 - 0.4
0.2 - 0.3 0.4 - 0.5 0.5
plastics hard 0.1 - 0.2 0.2 0.4 0.4 - 0.5 0.5
plastics soft 0.1 - 0.2 0.2 0.2 0.3 0.3 - 0.4
When using expanding machine reamers or reamers with inserted blades the metal removal allowance should
be reduced by approx. 30%. Due to the spiral, the values for quick spiral reamers may be increased by 50 to 100%.
Basic tolerances to DIN ISO 286-1
for length dimensions (nom. sizes) 1…120 mm
IT 3 4 5 6 7 8 9 10 11 12 13 14
nom. size 3 4 6 10 tolerances in µm 250
4 5 8 12 300
1…....3 2 4 6 9 15 14 25 40 60 100 140 360
> 3…....6 2,5 5 8 11 18 18 30 48 75 120 180 430
> 6…..10 2,5 6 9 13 21 22 36 58 90 150 220 520
>10…..18 3 7 11 16 25 27 43 70 110 180 270 620
>18…..30 4 8 13 19 30 33 52 84 130 210 330 740
>30…..50 4 10 15 22 35 39 62 100 160 250 390 870
>50…..80 5 46 74 120 190 300 460
>80…120 6 54 87 140 220 350 540
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