STANDARD KEYWAYS
"Metric" Standard Keyways and Set Screw
"Inch" Standard Keyways and Set Screw
Shaft Diameter (mm) From Including
Keyway (mm) Width Depth
Key (mm) Width Depth
Shaft Diameter (in.) From To
Keyway (in.)
Key (in.)
Width
Depth
Width
Depth
6 8
8
2 3 4 5 6 8
1
2 3 4 5 6 8
2 3 4 5 6 7 8 8 9
5/16
7/16 9/16
3/32
3/64 1/16 3/32
3/32
3/32
10 12 17 22 30 38 44 50 58 65 75 85 95
1.4 1.8 2.3 2.8 3.3 3.3 3.3 3.8 4.3 4.4 4.9 5.4 5.4 6.4 7.4 8.4
1/2 5/8
1/8
1/8
1/8
10 12 17 22 30 38 44 50 58 65 75 85 95
7/8
3/16
3/16
3/16
15/16
1-1/4
1/4
1/8
1/4
1/4
1-5/16 1-3/8 1-7/16 1-3/4 1-13/16 2-1/4 2-5/16 2-3/4 2-13/16 3-1/4 3-5/16 3-3/4 3-13/16 4-1/2 4-9/16 5-1/2 5-9/16 6-1/2 6-9/16 7-1/2 7-9/16 8-15/16
5/16
5/32 3/16
5/16
5/16
3/8 1/2 5/8 3/4 7/8
3/8 1/2 5/8 3/4 7/8
3/8 1/2 5/8 3/4 7/8
10 12 14 16 18 20 22 25 28 32 36
10 12 14 16 18 20 22 25 28 32 36
1/4
5/16
3/8
10 11 12 14 14 16 18 20
7/16
1
1/2 5/8 3/4 7/8
1
1
1-1/4 1-1/2 1-3/4
1-1/4 1-1/2 1-3/4
1-1/4 1-1/2 1-1/2 1-1/2 1-3/4
110 130 150
2
1
2
110 130
9
10-15/16 2-1/2
1-1/4
2-1/2
Metric Bolt Torques
Grade 8.8
Grade 10.9
Pitch
lb.ft.
(Nm)
lb.ft.
(Nm)
M5 M6 M8
4.4 7.4
(6)
5.9
(8)
(10) (25) (48) (84)
10.3 25.1 50.2 87.0 214 406 701 1401
(14) (34) (68)
18.4 35.4 62.0 152 297 513 1047
M10 M12 M16 M20 M24 M30
(118) (290) (550) (950)
(206) (402) (696)
(1420)
(1900)
Conversion Factors and Formulas Conversion Factors
Conversion Factors and Formulas Torque Calculation
Length
1μm = .00004 in. 1 m = 39.37 in. 1 m = 3.28 ft.
hp x 5250 rpm
T (lb.ft.) =
T (Nm) = lb.ft. x 1.356
1 inch = 25.4 mm
9550 x P (kW) rpm
1 ft. = 304.8m Force 1 lb. = 454 g
T (Nm) =
1 kg = 2.2 lb.
Torque 1 lb.in. = 0.113 Nm 1 lb.ft. = 1.36 Nm
Temperature °F = (1.8x°C) + 32
1 Nm = 8.85 lb.in. 1 Nm = 0.738 lb.ft.
C = 5/9x(°F–32)
Area 1 in. 2 = 0.00064516 m 2
Power 1 HP = 746 W = 0.746 kW 1 kW = 1.34 HP Work 1 Btu = 778 lb.ft. 1 Btu = 1055 J = 1.055 kJ 1 kJ = 0.948 Btu Moment of Inertia 1 lb.ft. 2 = 0.04214 kgm 2 1 kgm 2 = 23.73 lb.ft. 2 1 lb.in. 2 = 2.93x10-4 kgm 2 1 kgm 2 = 3417.17 lb.in. 2 1 lb.ft. s 2 = 1.3847 kgm 2 1 kgm 2 = 0.738 lb.ft. s 2 1 lb.in. s 2 = 0.1129 kgm 2 1 kgm 2 = 8.8507 lb. in. s 2
1 m 2 = 1550 in. 2 1 m 2 = 10.764 ft. 2
1 ft. 2 = 0.0929 m 2
Volume 1 ft. 3 = 2.832x10 -2 m 3 1 gal (US) = 3.7854 l Mass/Volume 1 lb.ft. -3 = 16.018 kgm -3
1 m 3 = 35.315 ft. 3 1 l = 0.2642 gal (US)
1 kgm -3 = 6.24x10 -2 lb.ft. -3
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