Toro Groundsmaster 1200 Service Manual page 22

Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Metric
Fasteners)
Thread Size
M5 X 0.8
M6 X 1.0
M8 X 1.25
M10 X 1.5
M12 X 1.75
M16 X 2.0
M20 X 2.5
Other Torque Specifications
Specifications and Maintenance: Torque Specifications
Class 8.8 Bolts, Screws, and
Studs with Regular Height Nuts
(Class 8 or Stronger Nuts)
57 ± 6 in-lb 644 ± 68 N∙cm
96 ± 10 in-lb 1085 ± 113 N∙cm
19 ± 2 ft-lb
38 ± 4 ft-lb
66 ± 7 ft-lb
166 ± 17 ft-lb
325 ± 33 ft-lb
Note: Reduce the torque values listed in the table above by 25% for lubricated
fasteners. Lubricated fasteners are defined as threads coated with a lubricant,
such as engine oil, or a thread sealant, such as Loctite.
Note: The torque values must be reduced when installing the fasteners into
threaded aluminum or brass. The specified torque value should be determined
based on the aluminum or base material strength, fastener size, length of thread
engagement, etc.
Note: The nominal torque values listed above are based on 75% of the minimum
proof load specified in SAE J1199. The tolerance is approximately ± 10% of the
nominal torque value.
Thread Size
1/4 - 20 UNC
5/16 - 18 UNC
3/8 - 16 UNC
1/2 - 13 UNC
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
78 ± 8 in-lb
133 ± 14 in-lb
26 ± 3 N∙m 28 ± 3 ft-lb
52 ± 5 N∙m 54 ± 6 ft-lb
90 ± 10 N∙m 93 ± 10 ft-lb
225 ± 23 N∙m 229 ± 23 ft-lb
440 ± 45 N∙m 450 ± 46 ft-lb
SAE Grade 8 Steel Set Screws
Recommended Torque
Square Head
140 ± 20 in-lb
215 ± 35 in-lb
35 ± 10 ft-lb
75 ± 15 ft-lb
Thread Cutting Screws
(Zinc Plated Steel)
Type 1, Type 23 or Type F
Page 2–8 Groundsmaster® 1200 Pull-Behind Rotary Mower
Class 10.9 Bolts, Screws, and
Studs with Regular Height Nuts
(Class 10 or Stronger Nuts)
881 ± 90 N∙cm
1503 ± 158 N∙cm
38 ± 4 N∙m
73 ± 8 N∙m
126 ± 14 N∙m
310 ± 31 N∙m
610 ± 62 N∙m
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
18235SL Rev A