‘Brushless’ is the big buzzword in power-tool land at the moment but is it a marketing strategy? Or are there real benefits a tradie should be looking to consider? Brushless motors are not new to power tools, in fact they’ve been around for decades in some corded products, often known more commonly as induction motors. However, brushless permanent-magnet motors have been a natural evolution into the world of cordless power tools due to significant reduction in motor sizes and the latest cuttingedge developments in circuit boards. ‘Brushless’, in the context of electric motors, means an absence of carbon brushes in the electromagnetic motor. Thanks to advances in technology the same effect is now achieved without the contact of carbon brushes on the commutator, making for a far more efficient motor. So what’s the benefit? For a low to moderate user there probably isn’t a great deal of benefit. A canned or brushed motor offers great value for money. That said, if you’re a medium- to high frequency user like a roofer or plasterer and tend to use tools with a high amp draw, there’s no hiding the fact a brushless motor offers some major advantages for a marginal increase in spend. With the removal of carbon brushes making contact on the commutator there’s a reduction in the physical size of the motor without sacrificing power. There’s also the reduction of friction and heat with fewer moving parts. That increases the overall efficiency of the motor and removes the need to replace the brushes when worn which invariably happens at the most inconvenient time. As a result of the efficiency in brushless motors a user will see longer run time in the battery, thereby reducing the number of times a battery needs to be charged, resulting in longer battery life overall. A user may also experience an increase in power and reduction in noise.
1. Power is delivered to the stationary electromagnets in the stator
2. Permanent magnets are fixed on the rotor on the inside. Polarity changes on the stator windings
3. The wearable components are removed, requiring less maintenance
4. The friction point is removed creating a more efficient use of the power and less power loss equating to more runtime
1. Carbon brushes deliver the power from the switch to the commutator
2. Permanent magnets are on the outside of the motor. Polarity changes on the rotor windings
3. The physical contact of the brushes causes system inefficiency through energy loss, friction and heat build up
4. Brushes wear occasionally and need maintenance and replacement
• The latest entry into the brushless market is the STANLEY® FATMAX range, and in a nutshell here’s what’s happening:
• The 18V Lithium-ion cordless range has been extended to feature a brushless hammer drill, impact driver and drill driver options
• The new STANLEY® FATMAX brushless range gives you enhanced performance with the same battery pack. Because of the optimised motor design, the tools have increased RPM, torque, runtime and life, all while staying compact and light.
• STANLEY ® FATMAX 18V system compatibility makes for exceptional value for professional tradespeople