191963-2 CB303 Hot-Selling Carbon Brush Set for Electric Drills and Grinders – Replacement for Models 9015B, 9016B, 9077, 9227CB, 9403

This is a carbon brush set product with the following details:

• Model and Specifications:
  The model is 191963-2, corresponding to carbon brush model CB303. It usually consists of 2 carbon brushes per set, with dimensions approximately 6.5x11x16.7/19mm.

• Applicable Tools:
  Suitable for various power tools, mainly including Makita models such as 9015B, 9016B, 9077, 9227CB, and 9403 (electric drills, grinders, etc.). It is also compatible with many other models like 4101RH and 5017RBK.

• Function:
  Carbon brushes are primarily used to conduct electric current, enabling the motor to operate normally. During the operation of power tools, carbon brushes make contact with the motor's commutator, transmitting external current to the rotating rotor to drive the motor. They are crucial components in power tool motors.

• Material:
  Typically made of graphite carbon, which offers excellent electrical conductivity, thermal conductivity, and lubrication properties, along with sufficient mechanical strength. This allows it to work well with the commutator during tool operation, reducing wear and sparking.

• Product Nature:
  As a power tool accessory, it is a consumable item. Carbon brushes gradually wear down during use and require regular replacement to maintain the normal performance and service life of the power tool.