Toro Pro Force 44552, Service Manual

Page: 22 / 134

Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Metric
Fasteners)
Thread Size
Class 8.8 Bolts, Screws, and
Studs with Regular Height Nuts
(Class 8 or Stronger Nuts)
Class 10.9 Bolts, Screws, and
Studs with Regular Height Nuts
(Class 10 or Stronger Nuts)
M5 X 0.8 57 ± 6 in-lb 644 ± 68 N∙cm 78 ± 8 in-lb 881 ± 90 N∙cm
M6 X 1.0 96 ± 10 in-lb 1085 ± 113 N∙cm 133 ± 14 in-lb 1503 ± 158 N∙cm
M8 X 1.25 19 ± 2 ft-lb 26 ± 3 N∙m 28 ± 3 ft-lb 38 ± 4 N∙m
M10 X 1.5 38 ± 4 ft-lb 52 ± 5 N∙m 54 ± 6 ft-lb 73 ± 8 N∙m
M12 X 1.75 66 ± 7 ft-lb 90 ± 10 N∙m 93 ± 10 ft-lb 126 ± 14 N∙m
M16 X 2.0 166 ± 17 ft-lb 225 ± 23 N∙m 229 ± 23 ft-lb 310 ± 31 N∙m
M20 X 2.5 325 ± 33 ft-lb 440 ± 45 N∙m 450 ± 46 ft-lb 610 ± 62 N∙m
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.
Specifications and Maintenance: Torque Specifications Page 2–8 Pro Force® Debris Blower
18237SL Rev A