Quicke Q20, Technical Manual

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2005-09 4:1
Installation
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INSTALLATION
Checking the subframe hardware
Check that all hardware are tightened to the specified
torque, first time after 10 hours of operation and then every
50 hours of operation. Please refer to the table below for
torque values.
Tightening torques - Hardware
Torque all the hardware on the subframe and all fasteners to
the values specified in the table below, except in the cases
where the tightening torque is specified in the assembly
instructions.
The torques specified below apply to clean, dry threads.
Lubricated threads can mean that the fastener is over
torqued. Damaged or dirty thread can cause torque values
which are too low.
A torque amplifier can be needed when tightening screws to
high torque values.
Grade 5 ( Class 8.8) Screw
Diameter Torque
1 /4” 10 lb-ft (13.6 Nm)
5/16” 20 lb-ft (27.1 Nm)
3/8” 35 lb-ft (47.5 Nm)
7/16” 55 lb-ft (75 Nm)
1/2” 85 lb-ft (100 Nm)
5/8” 170 lb-ft (230 Nm)
3/4” 300 lb-ft (405 Nm)
M8 27.1 Nm (20 lb-ft)
M10 54.2 Nm (40 lb-ft)
M12 94.9 Nm (70 lb-ft)
M14 119.3 Nm (88 lb-ft)
M16 189.8 Nm (140 lb-ft)
M20 264.4 Nm (195 lb-ft)
Grade 8 ( Class 10.9) Screw
Diameter Torque
1 /4” 11 lb-ft (14.9 Nm)
5/16” 24 lb-ft (32.5 Nm)
3/8” 44 lb-ft (59.7 Nm)
7/16” 71 lb-ft (96.3 Nm)
1/2” 114 lb-ft (154.6 Nm)
5/8” 222 lb-ft (301 Nm)
3/4” 325 lb-ft (440.6 Nm)
M8 32.5 Nm (24 lb-ft)
M10 63.7 Nm (47 lb-ft)
M12 108.4 Nm (80 lb-ft)
M14 176.3 Nm (130 lb-ft)
M16 271.2 Nm (200 lb-ft)
M20 542.3 Nm (400 lb-ft)