Electric Screwdriver Common Problems and Solutions

As a common power hand tool in the industry, electric screwdriver can't avoid some faults or problems during use. Then I will share several common faults and solutions:

#1. First Part: Motor

Basic components: armature, bearing, gasket

(1) Armature: The most important part of an electric screwdriver, like the "heart", the state of the armature will determine whether the electric batch can work normally. According to measure the armature's DC  resistance, we can know its quality. Under normal conditions, the DC resistance (220V) between the adjacent poles of the armature commutator is about 15Ω (the value is different depending on the manufacturer, and the larger DC resistance exceeds 20Ω)

(2) Bearing: From rotating the bearing, we can judge whether there is a stuck phenomenon, and when the internal friction is strong, the motor noise is large.

(3) Gasket: fixed armature to prevent up and down shaking, ensuring stability.

(4) The appropriate number of shims: The armature does not sway up and down, and the armature can be twisted with less force.

#2. Second Part: Clutch

Common clutch failure:

(1) Unable to call the main screwdriver

The output shaft is broken, and the output shaft is replaced (the steel ball groove becomes larger and the steel ball automatically falls off)

(2) lack of steel beads, make up new steel beads

#3.Three common problems:

(1) There is a slight numb feeling when holding the screwdriver:

• Check whether the factory safety power has tripped, if there is no trip, no one is safe.
• Check if the plug grounding and the screwdriver are connected

(2) Reasons for the shaking of the bit:

• The installation of the bit is tight, and the clearance of the installation part of the batch is small.
• Bit quality problems: the straight line of the batch head should be better, the wear resistance should be better.

(3) Possible factors for testing the instability of the torque:

• After a long period of high-intensity operation, the hardware wears out and the worn parts need to be replaced.
• Operator manual problem (the same type of screwdriver, if other tests are ok, then the method can be ruled out)
• The way to test the torque is not correct. For example, when testing with the torque tester, the normal working state of the screwdriver should be simulated. The torque value of continuous braking should not be tested.

#Conclusion

If you want to check if there is a problem with your existing electric screwdriver, you can refer to this article:

How to Check The Electric Screw Driver