General Tightening Torque Specifications; Definition Of Units - Yamaha PW50W 2007 Service Manual

GENERAL TIGHTENING TORQUE SPECIFICATIONS/

EAS20330
GENERAL TIGHTENING TORQUE SPECIFICATIONS
This chart specifies tightening torques for
standard fasteners with a standard ISO
thread pitch. Tightening torque specifications
for special components or assemblies are
provided for each chapter of this manual. To
avoid warpage, tighten multi-fastener assem-
blies in a crisscross pattern and progressive
stages until the specified tightening torque is
reached. Unless otherwise specified, tighten-
ing torque specifications require clean, dry
threads. Components should be at room tem-
perature.
A B
(nut) (bolt)
10 mm 6 mm
12 mm 8 mm
14 mm 10 mm
17 mm 12 mm
19 mm 14 mm
22 mm 16 mm

DEFINITION OF UNITS

Unit
mm Millimeter
cm Centimeter
kg Kilogram
N Newton
N•m Newton meter
m•kg Meter-kilogram
Pa Pascal
N/mm Newton per millimeter
L Litter
cm 3 Cubic centimeter
tr/mn Rotation per minute
DEFINITION OF UNITS
General tightening
torques
Nm m·kg
6 0.6
15 1.5
30 3.0
55 5.5
85 8.5
130 13.0
Read
10 -3
10 -2
10 3
1 kg
N × m
m × kg
N/m
N/mm
2-11
A: Distance between flats
B: Outside thread diameter
Definition
m
m
gram
× m/sec
2
2
—
—
SPEC
Measure
Length
Length
Weight
Force
Torque
Torque
Pressure
Spring rate
Volume or Capacity
Engine speed