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Replacement Power Tool Trigger Switch with lock Milwaukee 14-78-0550

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  • $16.99

Trigger type switch with lock has 4 internal terminals and replaces Milwaukee 30-78-0550 switch. 10A-125V Over Hang Trigger Switch with Lock. Integrated dust proof commonly used in high rated bench top and power tools. Switches are commonly replaced parts in power tools.

Switches are commonly replaced parts in power tools. A switch handles all on/off and variable speed functions. They also have a role in electric breaking; they can momentarily reverse electrical polarity. Because switches use mechanical internals, they tend to degrade and wear out over time, eventually requiring replacement.

NOTE:Some common signs of a broken or failing switch are:

  • Tool has completely stopped functioning - it will not turn on
  • Tool operates intermittently, requiring multiple tries to turn on, until eventually it won't turn on at all
  • Variable speed function and electric braking aren't working properly

Compatible with:


6122-30 (B65A) Grinder
6122-31 (SER B66A) 4.5" Angle Grinder
6123-30 (SER B67A) 6" Angle Grinder With Lock
6123-31 (SER B68A) 6" Angle Grinder
6121-30 (C96A) 4.5" Angle Grinder


  • Voltage: 125V
  • Amperage: 10A
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