MASSEY FERGUSON MF 300 Series, Руководство по обслуживанию мастерской

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Miscellaneous Data
BOLT TORQUE SPECIFICATIONS (GENERAL GUIDE FOR METRIC FASTENERS)
Use the "Standard Torque" charts as a general guide when tightening fasteners that DO NOT HAVE SPECIFIC
TIGHTENING RECOMMENDATIONS.
Metric Fasteners
Standard torque in Newton Metres (Foot Pounds)
* Metric bolt SAE grade 5 SAE grade 8 ISO grade 10.9
size
** mild steel
ISO grade 8.8 BS grade V
below grade 5 BS grade S
*** Non-rigid joint **** Rigid joint *** Non-rigid joint **** Rigid joint
M6 4-5 8-11 10-14 12-16 14-20
(3-4) (6-8) (7-10) (9-12) (10-15)
MB 10-13 20-28 25-35 29-37 36-46
(7-10) (15-21) (18-26) (21-27) (27-34)
M10
19-25 40-56 50-70 57-77 72-96
(14-18) (30-41) (37-52) (42-57) (53-71)
M12 33-43 72-96 90-120 100-130 120-160
(24-32) (53-71) (66-89) (74-96) (89-118)
M16 84-110 160-210 200-260 240-320 300-400
(62-81) (118-155) (148-192) (177-236) (221-295)
M20 160-210 340-450 420-560 480-640 600-800
(118-155) (251-332) (310-413) (354-472) (443-590)
Key to table above:
*
NOTE: The size is the diameter of the shank - not the head width.
**
***
****
NOTE: Mild steel torque values to be used for SAE Grade
5
bolts when weld nuts, or other low
strength nuts are used.
NOTE: Use these values when any of the following conditions exist:
1. Possible damage to the joined members of the assembly may occur.
2. Thick and/or highly compressible gaskets are used between members.
3. Non-flat unmachined seating surfaces for bolt head (or nut) occurs.
4. Non-flat or non-parallel joint faces are encountered.
NOTE: Use these values when ALL of the following conditions exist:
1. Damage will not occur to the joined members of the assembly.
2. It is desirable to use this higher clamping force to ensure tightness.
3. Fastener thread is not lubricated prior to assembly.
1C-3
MF 300 series
ACT0027090