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Power Tools
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Common symptoms
- At no load the motor starts, but speed has a dead band, surges, cuts out, or ignores trigger pressure.
- A charged, latched battery and normal trigger command produce no chuck rotation.
- With the battery removed and no bit fitted, the chuck will not hand-turn normally or feels seized.
- With the bit removed, the driver makes continuous abnormal grinding, knocking, or scraping.
- The drill stops early or gives far less runtime than expected without unusual heat.
- The torque collar binds, will not stay on a setting, or the clutch slips or locks at every position.
- The motor can be heard running, but the chuck is stationary or does not rotate normally.
- The drill makes abnormal grinding or knocking, vibrates strongly, or the chuck and spindle have play.