7.2 X 15 X 22mm Carbon Brushes Electric Tool Replacement Parts

7.2×15×22mm Carbon Brushes Electric Tool Replacement Parts Brush Set

Key Information Analysis:

1. Product Attribute: Carbon Brushes Set for Electric Tool Replacement Parts
   Made by pressing a mixture of high-density graphite and a high proportion of copper powder (copper content approximately 30%-40%), it has three core characteristics:
   • High load adaptability: The high copper content formula can withstand large currents (suitable for medium and high-power motors), reducing overheating of the carbon brush caused by long-term high-intensity operations;
   • Strong wear resistance: The material is dense and structurally stable, with wear resistance improved by more than 20% compared to ordinary carbon brushes, extending service life (about 1200-2000 hours);
   • Balanced conductivity: The set design (2 pieces) ensures uniform wear of carbon brushes on both sides of the motor, maintaining balanced current conduction and avoiding abnormal sparks or power fluctuations caused by poor contact on one side.
2. Compatibility Range:
   Based on the 7.2×15×22mm specification, it is suitable for brushed motors of various medium and high-power electric tools. Common applicable scenarios include:
   • Industrial-grade electric tools: such as heavy-duty angle grinders, large grinders, high-torque electric drills, industrial-grade reciprocating saws, etc. (power 800-2000W);
   • Professional equipment: some models of stone cutting machines, concrete vibrators, heavy-duty polishers, etc.
     The core of compatibility is that the size must completely match the motor's brush holder (with an error of ≤0.2mm). In particular, the precision of the width (15mm) and thickness (7.2mm) must strictly correspond to the original carbon brush specifications to avoid looseness or insufficient contact area after installation.
3. Size Specifications: 7.2×15×22mm
   This size belongs to the category of medium and large carbon brushes. The length of 22mm provides sufficient wear allowance, and the 7.2mm thickness and 15mm width are suitable for most standard industrial-grade brush holders. The dimensional accuracy is controlled within ±0.1mm to ensure tight contact between the carbon brush and the commutator, reducing vibration noise and sparks during operation.
4. Functions and Roles:
   • Serves as the "core of power conduction" for electric tool motors, stably transmitting external current to the rotor, ensuring continuous power output of the tool during heavy-load operations (such as cutting thick metal, grinding hard stone);
   • The high copper formula enhances heat dissipation performance, adapting to the high-temperature working environment of medium and high-power motors, and reducing the risk of carbon brush fragmentation or motor burnout due to overheating.
5. Replacement Tips:
   The carbon brush set should be replaced in time when the electric tool shows the following conditions:
   • The carbon brush is worn down to less than 1/3 of its original length (about 7-8mm);
   • There are significantly more sparks at the carbon brush during motor operation, or accompanied by a continuous burning smell;
   • The output torque of the tool decreases, such as reduced cutting/grinding efficiency, slow startup, or operation stuttering.