Page 1009 - MiSUMi FA Mechanical Components Economy Series

[Technical Calculation]
Dimension of Normal Parallel Key Type Excerpted from GB/T 1096—1979

Dimension of Normal Parallel Key Type (Excerpted from GB/T 1096ˋ1979)

Type A Type B Type C

h c PS r
Rb/2 Rb/2

b
L L L

Mark Example:
Round end normal parallel key (Shape A) b16mm, h10mm, L100mm Mark: Key 16–100 GB/T 1096ˋ1979
Mark with the same dimension (Shape B), (Shape C): Key B16–100 GB/T 1096ˋ1979, Mark: Key C16–100 GB/T 1096ˋ1979
Table 1 Correspondence of b and h with Nominal Size and Limit Deviation
Nominal Dimension 2 3 4 5 6 8 10 12 14 16 18 20 22
b Limit Deviation 0 0 0 0 0
(h9) 0.025 0.030 0.036 0.043 0.052
Nominal Dimension 2 3 4 5 6 7 8 8 9 10 11 12 14
h Limit Deviation 0 ( 0 ) ΍ 0 ( 0 ) ΍ 0 0
(h11) 0.06 0.025 0.075 0.030 0.090 0.110
C or r 0.16։0.25 0.25։0.40 0.40։0.60 0.60։0.80
Nominal Dimension 25 28 32 36 40 45 50 56 63 70 80 90 100
b Limit Deviation 0 0 0 0
(h9) 0.052 0.062 0.074 0.087
Nominal Dimension 14 16 18 20 22 25 28 32 32 36 40 45 50
h Limit Deviation 0 0 0
(h11) 0.110 0.130 0.160
C or r 0.60։0.80 1.0։1.2 1.6։2.0 2.5։3.0
΍ The values in parentheses (corresponding to h9) apply to Shape B keys.
Table 2 Correspondence of L with Nominal Size and Limit Deviation
Nominal Dimension 6 8 10 12 14 16 18 20 22 25 28 32 36 40 45 50 56 63 70 80 90 100 110
L Limit Deviation 0 0 0 0 0 0
(h14) 0.36 0.43 0.52 0.62 0.74 0.87
Note: Key Length L
Row: 6,8,10,12,14,16,18,20,22,25,28,32,36,40,45,50,56,63,70,80,90,100,110,125,140,160,180,200,220,250,280,320,360,400,500 Tolerance is h14
1. Parallel key, Keyway profi le size should comply with regulations of GB/T 1095ˋ2003 Keyway profi le sizes for parallel keys.
2. Technical conditions for normal parallel keys should comply with regulations of GB/T 1568ˋ2008 "Technical specifi cations for keys".
3. When the key length is longer than 500mm, its length should be selected according to R20 series of GB/T 321ˋ2005 "Preferred numbers -Series of preferred numbers".

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