Toro TIMECUTTER HD 75212 - Page 18

2-12
Digital Edition - TIMECUTTER® HD Service Manual
April 2017
Table of Contents
SPECIFICATIONS
Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Metric) (Cont.)
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.
SAE Grade 8 Steel Set Screws
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 Nm
M12 X 1.5
Class 8.8
80 ± 10 ft-lb. 108 ± 14 Nm
**For steel wheels and non-lubricated fasteners.
Wheel Bolts and Lug Nuts
Threads 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.
Thread Cutting Screws
(Zinc Plated Steel)
*Hole size, material strength, material thickness and
nish must be considered when determining specic
torque values. All torque values are based on non-
lubricated fasteners.
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)
*Hole size, material strength, material thickness and
nish must be considered when determining specic
torque values. All torque values are based on non-
lubricated fasteners.
Conversion Factors
in-lb. X 11.2985 = N-cm
ft-lb. X 1.3558 = N-m
N-cm X 0.08851 = in-lb.
N-cm X 0.73776 = ft-lb.