Choose a motor with a sufficient wattage for your sawing needs. Higher wattage generally translates to more power and faster cutting. Consider the type of motor – brushed motors are generally cheaper but require more maintenance, while brushless motors are more durable and often more powerful, although pricier.
Brushed Motor Maintenance
Regularly inspect your brushed motor’s brushes for wear. Replace them when they are shorter than about one-third of their original length. Clean the commutator with a clean cloth and contact cleaner to remove carbon dust which can interfere with operation. Lubricating the bearings can extend the motor’s lifespan.
Understanding Motor Components
The motor housing protects the internal components. The armature, the rotating part of the motor, contains the windings and commutator. The commutator, a segmented ring, switches the current direction to the windings, creating rotation. The field magnets generate the magnetic field that interacts with the armature’s windings, producing torque.
| Housing | Protects internal parts | Inspect for cracks or damage |
| Armature | Rotating component | Check for damage or excessive wear |
| Commutator | Directs current | Clean regularly |
| Field Magnets | Generate magnetic field | Inspect for weakening or damage |
| Brushes (Brushed Motors Only) | Conduct electricity to commutator | Regularly inspect and replace |
Troubleshooting Motor Issues
If your saw runs slowly or not at all, check the power cord and connections. Examine the brushes for wear (if applicable). A faulty motor may require professional repair or replacement.
