maxicut 600 - Twose

5299 7. MAINTENANCE 0306
PROPER TORQUE FOR FASTENERS
The chart below lists th e correct tig htening torque for faste ners. When bolts are t o be tighten ed or
replaced, refer to this chart to determine the grade of bolts and the proper torque except when specific
torque values are assigned in manual text.
RECOMMENDED TORQUE IN FOOT POUNDS (NEWTON-METERS) UNLESS OTHERWISE
STATED IN THE MANUAL
NOTE: These values apply to fasteners as received from supplier, dry or whe n lubricated with
normal engine oil. The y do not apply if specia l graphited or molydisulphide greases or
other extreme pressure lubricants are used. This applie s to UNF fi ne, UNC coarse
threads, and metric fine and course threads.
Proper torque values for imperial bolts
(Figures in brackets are value in Nm)
Proper Torque Values for Metric bolts
Bolt
Diameter
Head
Marking
No Marks
Grade Two
Pound –
Foot value
Dry
Head
Marking
Three
Lines
Grade Five
Pound –
Foot Value
Dry
Head
Marking
Six Lines
Grade Eight
Pound –
Foot Value
Dry
Bolt
Diameter
Head
Marking
4.8
Pound –
Foot Value
Dry
Head
Marking
8.8 or 9.8
Pound –
Foot Value
Dry
Head
Marking
10.9
Pound –
Foot Value
Dry
Head
Marking
12.9
Pound –
Foot Value
Dry
¼” 5.5(7.5) 9(12.2) 12.5(17.0) 6mm 4.5(6.1) 8.5(11.5) 12(16.3) 14.5(2.0)
5/16” 11(15.0) 18(25.0) 26(35.2) 8mm 11(14.9) 20(27.1) 30(40.1) 35(47.5)
3/8” 20(27.0) 33(45.0) 46(63.0) 10mm 21(28.5) 40(54.2) 60(81.4) 70(95)
7/16” 32(43.0) 52(70) 75(100) 12mm 37(50.2) 70(95.0) 105(140) 120(160)
½” 50(68.0) 80(110) 115(155) 14mm 60(81.4) 110(150) 165(225) 190(260)
9/16” 70(95.0) 115(155) 160(220) 16mm 92(125) 175(240) 255(350) 300(400)
5/8” 100(135) 160(220) 225(305) 18mm 125(170) 250(340) 350(475) 410(550)
¾” 175(240) 280(380) 400(540) 20mm 180(245) 350(475) 500(675) 580(790)
7/8” 175(240) 450(610) 650(880) 22mm 250(340) 475(645) 675(915) 800(1090)
1” 270(360) 675(915) 975(1325) 24mm 310(420) 600(810) 850(1150) 1000(1350)
1-1/8” 375(510) 850(115) 1350(1830) 27mm 450(610) 875(1180) 1250(1700 1500(2000)
1-1/4” 530(720) 1200(16250) 1950(2650) 30mm 625(850) 1200(1610) 1700(2300) 2000(2700)
1-3/8” 700(950) 1550(2100) 2550(3460)
1-1/2” 930(1250) 2100(2850) 3350(4450)
*To get Newton-Metres multiply pound-foot of torque by 1.356
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