TABLE 1814ii Values in microns Tolerances of holes Tolerance

TABLE 18-14(ii) (Values in microns) Tolerances of holes Tolerances of shafts Nominal | D101 E9 | F8 | G7 | JS7 | K7 | j6 | k6 | n6 | P6 sizes From 1 + 60 | + 39 | + 20 +12 | + 5 0 |+ 3 | + 6 | +10 | +12 Upto 3 + 201+14|+ 6 + 2 10 Over 3 + 78|+ 50 | + 28 | +16 | +3 + 4 | +91+16 | + 20 Upto 6 +301+201+101+4 Over 6 + 98|+ 61 | + 35 | +20 | + 7.5 | + 5 + 4.5| +10 | +19 | + 24 Upto 10 | + 40|+ 25 | + 13 | + 5 7.5 10 4.51 + 1 | +10 | + 15 Over 10 | +120|+75 |+43 | +24 | + 9 + 6 | + 5.5| +12 | +23 | + 29 Upto 18 | + 50|+ 32 | + 16 | + 6 12 5.51 + 1 | +12 | + 18 Over 18 | +149|+ 92 | + 53 | +28 | +10.5 +6 | + 6.5 | +15 | +28|+35 Upto 30 | + 65|+ 40 | + 20 | + 7 | -10.5 15 6.51 + 2 | +15 | + 22 Over 30 | +1801 +112 | + 64 | +34 | +12.5 | + 7 | + 8 | +18 | +33|+ 42 Upto 50 | + 80|+ 50 | + 25 | + 9 | -12.5 18 + 2 | +17 | + 26 Over 50 | +220| +134 | + 76 | +40 | +15 + 9 + 9.51 +21 | +39 | + 51 Upto 80 | +1001 + 60|+ 30 | +10 21 9.51 + 2 | +20|+32 Over 80 | +260| +159|+90 | +47 |+17.5 | +10 | +11 | +25 | +45|+ 59 Upto 120 | +120|+ 72 | + 36 | +12 | -17.5 25 -11 | + 3 | +23 | + 37 Over 120 | +305 | +185 | +106 | +54 | +20 +12 | +12.5| +28 | +52|+68 Upto 180 | +145|+ 85 | + 43 | +14 -20 | -28 | -12.5| + 3 | +27 | + 43 Over 180 | +355| +215 | +122 | +61 | +23 +13 | +14.5| +33 | +60|+79 Upto 250 | +170 | +100|+50 | +15 23 +33 14.51 + 4 | +31 | + 50 Over 250 | +400| +240 | +135 | +69 | +26 +16 +16 | +36 | +66|+88 Upto 315 | +190| +110|+ 55 | +17 -26 | -36 |-16 16 | + 4 | +34|+56 Over 315 | +440| +265 | +151 | +75 | +28.5 | +17 | +18 | +40 | +73|+98 Upto 400 | +210| +125 |+ 69 | +18 | -28.5 40 18 | + 4 | +37| +62 Over 400 | +480| +290 | +165 | +83 | +31.5 | +18 +20 | +45 +801 +108 Upto 500 | +230| +135 |+ 68 | +20 | -31.5| -45 |-20 5 | +40 | + 68 212-213242-53-536475-85-96_06 04-68-9032-8537-9053-27-01-6437_00 11 212-313242-5263-63-73_84 9-01-21_52-82-12-5383346404-55 555555 6-33-44-44-55-66 11-11-11-11|1122 0-39-5062-6578-91-05-28-33-66-70_85 7-01 -- -- -- I | --+ 55 7-55-66 77 22640546874900-72-44-15-9758_30 0680 53363045-600663-20-55T958 213_41-526273-93-04-2535-5666 9400-15-5220204092-5550-00-55_05 -3152627394-1536-5788-1041-62-93 -0080-8000-9500-00-00-55-5000-00-00 -62-73942546-882062-04-570941-83 | 3

Solution

GIven :

Shaft Outer Diameter = 15 mm

Bore Diameter of the Gear = Diameter of the hole = 15 mm

Solution:

From the given Table 18-14 In the Nominal sizes coloumn select Over 10 Upto 18 (Since the diameter of hole and shaft is 15mm)

Press fit specified by G7p6 ( From Question) - This implements that we need to see the value of tolerence in G7 Column in Holes and p6 Column in the Shafts.

Therefore the relevant tolerence values are

For Holes = +24 to +6 microns (10^^_-3 mm)

For Shaft = +29 to +18 microns (10^^_-3 mm)

Therefore the diameter of the hole and the shaft will be in the range of

Hole = 15.024 mm to 15.006 mm

Shaft = 15.029 mm to 15.018 mm.