Other Torque Specifications; Conversion Factors - Toro Groundsmaster 4000-D Service Manual

Other Torque Specifications

SAE Grade 8 Steel Set Screws
Thread Size Thread Size
Square Head
1/4 − 20 UNC 140 + 20 in−lb
5/16 − 18 UNC 215 + 35 in−lb
3/8 − 16 UNC 35 + 10 ft−lb
1/2 − 13 UNC 75 + 15 ft−lb
Thread Cutting Screws
(Zinc Plated Steel)
Type 1, Type 23, or Type F
Thread Size
No. 6 − 32 UNC
No. 8 − 32 UNC
No. 10 − 24 UNC
1/4 − 20 UNC
5/16 − 18 UNC
3/8 − 16 UNC

Conversion Factors

in−lb X 11.2985 = N−cm
ft−lb X 1.3558 = N−m
Product Records and Maintenance
Recommended Torque
Hex Socket
73 + 12 in−lb
145 + 20 in−lb
18 + 3 ft−lb
50 + 10 ft−lb
Baseline Torque*
20 + 5 in−lb
30 + 5 in−lb
38 + 7 in−lb
85 + 15 in−lb
110 + 20 in−lb
200 + 100 in−lb
Wheel Bolts and Lug Nuts
Thread Size
7/16 − 20 UNF
Grade 5
1/2 − 20 UNF
Grade 5
M12 X 1.25
Class 8.8
M12 X 1.5
Class 8.8
** For steel wheels and non−lubricated fasteners.
Thread Cutting Screws
Thread Threads per Inch
Size Size
Type A
No. 6 18
No. 8 15
No. 10 12
No. 12 11
* Hole size, material strength, material thickness & finish
must be considered when determining specific torque
values. All torque values are based on non−lubricated
fasteners.
N−cm X 0.08851 = in−lb
N−m X 0.7376 = ft−lb
Page 2 − 6
Recommended Torque**
65 + 10 ft−lb 88 + 14 N−m
80 + 10 ft−lb 108 + 14 N−m
80 + 10 ft−lb 108 + 14 N−m
80 + 10 ft−lb 108 + 14 N−m
(Zinc Plated Steel)
Baseline Torque* Baseline Torque*
Type B
20 20 + 5 in−lb
18 30 + 5 in−lb
16 38 + 7 in−lb
14 85 + 15 in−lb
Groundsmaster 4000−D