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Quick Step Tightening Strategy
Quick step tightening strategy is used to reduce the joint’s preload scatter by
adding an initial step with a given torque and speed, and then reducing the
target speed in the final step.
Start Stop
TIME
TORQUE/TIME ANGLE/TIME SPEED/TIME
Rundown Tightening
Rundown Complete
Target Speed
First Speed
First Torque
Target Torque
Three Step Tightening Strategy
The three step tightening strategy adds a loosening step between the
first step and the final step to overcome short-term relaxation effects due
to embedment, and reduce preload scatter. This is sometimes called to
condition the joint. This can be useful in, for example, joints with many
adjoining surfaces and will have greater effect on new parts than on reused
ones due to the smoothening of surfaces which will reduce embedment.
Conditioning the joint is done by tightening the first step to a given torque,
First torque, and then releasing the load by turning the nut a specified
Conditioning angle and then retightening the nut to its Target torque.
Target Speed
Conditioning Speed
Target Torque
First Torque
Rundown Complete
Start Stop
TIME
TORQUE/TIME ANGLE/TIME SPEED/TIME
Rundown Tightening
First Speed
Parameter Description Default Value
First torque Target torque for the first step
First speed Target speed for the first step
Parameter Description Default Value
First torque Target torque for the first step
First speed Target speed for the first step
Conditioning speed Target speed during the conditioning step
Conditioning angle Angle to turn the socket during the conditioning step 180°
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