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Toro® - SnowMaster® Service Manual
Specifications & Maintenance
2
SPECIFICATIONS AND MAINTENANCE
2-3
Other Torque Specifications
SAE Grade 8 Steel Set Screws
Thread Cutting Screws (Zinc Plated Steel)
Type 1, Type 23, or Type F
Thread Size
Baseline Torque*
No. 6 - 32 UNC
20 ± 5 in-lb
No. 8 - 32 UNC
30 ± 5 in-lb
No. 10 - 24 UNC
38 ± 7 in-lb
1/4 - 20 UNC
85 ± 15 in-lb
5/16 - 18 UNC
110 ± 20 in-lb
3/8 - 16 UNC
200 ± 100 in-lb
Thread Cutting Screws (Zinc Plated Steel)
Thread Size
Threads per Inch
Baseline Torque*
Type A
Type B
No. 6
18
20
20 ± 5 in-lb
No. 8
15
18
30 ± 5 in-lb
No. 10
12
16
38 ± 7 in-lb
No. 12
11
14
85 ± 15 in-lb
* Hole size, material strength, material thickness and finish must
be considered when determining specific torque values. All torque
values are based on nonlubricated fasteners.
Wheel Bolts and Lug Nuts
Thread Size
Recommended Torque**
7/16 - 20 UNF Grade 5
65 ± 10 ft-lb
88 ± 14 N-m
1/2 - 20 UNF Grade 5
80 ± 10 ft-lb
108 ± 14 N-m
M12 X 1.25 Class 8.8
80 ± 10 ft-lb
108 ± 14 N-m
M12 X 1.5Class 8.8
80 ± 10 ft-lb
108 ± 14 N-m
** For steel wheels and non-lubricated fasteners.
U.S. to Metric Conversions
To Convert
Into
Multiply By
Linear Measurement
Miles
Yards
Feet
Feet
Inches
Inches
Inches
Kilometers
Meters
Meters
Centimeters
Meters
Centimeters
Millimeters
1.609
0.9144
0.3048
30.48
0.0254
2.54
25.4
Area
Square Miles
Square Feet
Square Inches
Acre
Square Kilometers
Square Meters
Square Centimeters
Hectare
2.59
0.0929
6.452
0.4047
Volume
Cubic Yards
Cubic Feet
Cubic Inches
Cubic Meters
Cubic Meters
Cubic Centimeters
0.7646
0.02832
16.39
Weight
Tons (Short)
Pounds
Ounces
Metric Tons
Kilograms
Grams
0.9078
0.4536
28.3495
Pressure
Pounds/Sq. In.
Kilopascal
6.895
Work
Foot-pounds
Foot-pounds
Inch-pounds
Newton-Meters
Kilogram-Meters
Kilogram-Centimeters
1.356
0.1383
1.152144
Liquid Volume
Quarts
Gallons
Liters
Liters
0.9463
3.785
Liquid Flows
Gallons/Minute
Liters/Minute
3.785
Temperature
Fahrenheit
Celsius
1. Subtract 32°
2. Multiply by 5/9
Conversion Factors
in-lb x 11.2985 = N-cm
N-cm x - 0.08851 = in-lb 88 ± 14 N-m
ft-lb x 1.3558 = N-m
N-cm x 0.73776 = ft-lb 108 ± 14 N-m
Thread Size
Recommended Torque
Square Head
Hex Socket
1/4 - 20 UNC
140 ± 20 in-lb
73 ± 12 in-lb
5/16 - 18 UNC
215 ± 35 in-lb
145 ± 20 in-lb
3/8 - 16 UNC
35 ± 10 ft-lb
18 ± 3 ft-lb
1/2 - 13 UNC
75 ± 15 ft-lb
50 ± 10 ft-lb