Height Rider/SP Series
Operating & Safety Instructions
English/USA – 07/17
Original instructions
21
3.5
TORQUE REQUIREMENTS
Bolt quality/size
Tightening torque in Nm (ft-lbs)
Plated
Unplated
Grade
8.8
10.9
12.9
8.8
10.9
12.9
M6
7 (5)
10 (8)
12 (9)
8 (6)
11 (8)
13 (10)
M8
17 (13)
25 (18)
29 (22)
19 (14)
27 (20)
32 (23)
M10
34 (25)
49 (36)
58 (43)
37 (27)
54 (40)
63 (46)
M12
58 (43)
85 (63)
99 (73)
63 (47)
93 (69)
108 (80)
M14
93 (68) 135 (100) 158 (117)
101 (74) 148 (109) 172 (127)
M16
143 (106) 209 (154) 245 (180) 156 (115) 228 (168) 267 (197)
M20
288 (212) 408 (301) 477 (352) 304 (224) 445 (328) 521 (384)
M24
491 (362) 698 (515) 816 (602) 519 (383) 760 (561) 889 (656)
WHEEL NUTS
225 Nm (166ft lbs)
WHEEL GEARBOX NUTS
215 Nm (158ft lbs)
SLEW RING BOLTS
295 Nm (218ft lbs)
This torque chart is based on the following assumptions:
1) Bolts to ISO 898-1 "Mechanical properties of fasteners made of carbon steel and alloy steel"
2) For "unplated" bolts, all grades:
Hex head bolts
Black oxide steel bolt with a rolled & oiled thread, no finish on steel nut
Prevailing torque includes Nylock (minimum prevailing torque figure assumed)
Medium Clearance holes to ISO 273
Bolt tightening condition = Yield factor of 75%
3) For "plated" bolts, all grades:
Hex head bolts
Zinc plated oiled (rolled or cut) steel external thread with no finish on steel internal thread
Prevailing torque includes Nylock (minimum prevailing torque figure assumed)
Medium Clearance holes to ISO 273
Bolt tightening condition = Yield factor of 75%
Figures quoted in
Nm
have been calculated in Nm and then rounded to the nearest whole number.
Figures quoted in
lb-ft
have been calculated in Nm, converted using a factor of 0.737561 and then
rounded.
Summary of Contents for HR21 4x4
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