Operation Manual

BX25. RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM
ROTARY MOWER
[3] TIGHTENING TORQUES (GENERAL USE SCREWS, BOLT AND NUTS)
Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened
according to the table below.
Indication on top of
0
@
No-grade or 4T
ill
7T
®
9T
bolt
Material
of bolt
SS400,S20C
S43C,S48C
SCr435,
SCM435
Material
of opponent
Ordinariness
Aluminum
Ordinariness
Aluminum
Ordinariness
part
~it
Diameter
N'm
kgf·m IbHt
N·m kgf'm IbHt N·m
kgf·m
IbHt
N'm
kgf·m IbHt
N'm
kgf·m IbHt
M6
7.9
0.80
5.8 7.9 0.80
5.8
9.81 1.00 7.24 7.9
0.80 5.8 12.3
1.25
9.05
(6 mm, 0.24 in.)
to
to
to to to
to
to to to
to to
to to
to
9.3
0.95
6.8
8.8 0.90
6.5 11.2 1.15 8.31
0.90 6.5 14.2
1.45
10.4
M8
18
1,8
13
17 1.7
13
24 2.4 18 1.8
13 30 3.0 22
(8 mm, 0.31 in.)
to
to to
~~
to to to
to to
to to to to to to
20
2.1
15
2.0 14 27 2.8
20 20
2.1
15
34 3.5 25
M10
40
4r
29 32
3.2 24
48 4.9
36 40 4.0 29
61
6.2 45
(10
mm, 0.39 in.)
to to to to to to to to to to
to to
to to
to
45 4.6
33 34
3.5 25
55 5.7
41
44
4.5
32
70
7.2
52
M12
63
6.4
47 78 7.9 58 63 6.4 47 103 10.5 76.0
(12 mm, 0.47 in.)
to to
to
-
-
to to to
to
to to to
to
to
72
7.4 53
90
9.2
66 72
7.4
53
117 12.0 86.7
M14
108 11.0
79.6
124 12.6 91.2 167 17.0 123
(14
mm. 0.55 in,)
to
to
to
-
-
to
to
to
-
-
to
to to
125 12.8 92.5 147 15.0 108 196
20.0
144
M16
167 17.0 123 197
20.0
145
260
26.5
192
(16
mm, 0.63 in.)
to
to
to
- -
to to to
-
-
to to to
191
19.5 141
225 23.0 166
304
31.0 224
M18
246
25.0
181 275
28.0 203 344 35.0 254
(18
mm, 0.71 in.)
to to to
- -
to to
to
-
- -
to
to to
284 29.0
209
318
32.5
235
402
41.0 296
M20
334 34.0 246
368
37.5 272 491
5~0
362
(20
mm, 0.79 in.)
to to to
-
- -
to to to
-
-
to to
392
40.0
289
431 44.0 318
568
58.0
419
i
,
Wi 034542
American standard cap screw with UNC or UNF threads.
SAEGR.5 SAEGR.8
Grade
G
@
~
Nominal
Diameter
N'm
kgf'm IbNt
N'm
kgf'm
IbNt
5/16
23.1 to 27.7 2.35 to 2.83 17.0 to 20.5 32.6 to 39.3
3.32 to 4.00 24.0
to 29.0
3/8 48 to 56
4.9 to 5.8 35.0 to 42.0
61.1 to 73.2 6.23 to 7.46
45.0 to 54.0
112
109to~
11.1 to 13.2
80.0 to 96.0
~to 178.9
15.21 to 18.24 110.0 to 132.0
9116
149.2 to
15.21 to 18.24 110.0
to 132.0 .0 to 260.3 22.12 to 26.54
160.0 to 192.0
518
203.4 to 20.74 to 24.88
150.0 to 180.0 298.3 to 357.9 30.42 to 36.49
220.0 to 264.0
W1016345
7-S3