Grasshopper 124/52 - MEASUREMENT CONVERSION; Conversion Table - Inches; BOLT SIZE AND TIGHTENING RECOMMENDATIONS; Bolt Head Markings

16
MEASUREMENT CONVERSION
Measurements expressed in this manual are
decimal values. Use the chart below if you are
unsure of a measurement to obtain the fractional
equivalent.
BOLT SIZE AND TIGHTENING
RECOMMENDATIONS
The chart below lists the correct tightening
torque for bolts used on Grasshopper machin-
ery. When bolts are to be tightened or replaced
refer to this chart to determine the grade of bolt
and proper torque (except when speci f c torque
values are assigned in the manual text).
Bolt Head Markings
SAE Grade 2
(no dashes)
SAE Grade 5
(3 radial dashes)
SAE Grade 8
(6 radial dashes)
Decimal
Conversion Table - Inches
Decimal Fraction
0.062
0.125
0.187
0.250
0.312
0.375
0.437
0.500
1/16
1/8
3/16
1/4
5/16
3/8
7/16
1/2
0.562
0.625
0.687
0.750
0.812
0.875
0.937
1.000
9/16
5/8
11/16
3/4
13/16
7/8
15/16
1
Fraction
Decimal Fraction ft lb (Nm) ft lb (Nm) ft lb (Nm)
0.250 1/4 6 (8) 11 (15) 14 (19)
0.312 5/16 13 (18) 21 (28) 25 (34)
0.375 3/8 23 (31) 38 (52) 55 (75)
0.437 7/16 37 (50) 55 (75) 80 (108)
0.500 1/2 57 (77) 85 (115) 120 (163)
0.562 9/16 82 (111) 125 (170) 180 (244)
0.625 5/8 111 (151) 175 (237) 230 (312)
0.750 3/4 200 (271) 300 (407) 440 (597)
0.875 7/8 280 (380) 450 (610) 720 (976)
1.000 1 350 (475) 680 (922) 1035 (1403)
Bolt Diameter in Inches
Recommended Bolt Torque
SAE Grade 2
SAE Grade 5
SAE Grade 8