10*25*25 MM Carbon Brush for Power Tools Motor Replacement

10×25×25 MM Carbon Brush for Power Tools Motor Replacement

Key Information Analysis:

1. Product Attribute: Large-Sized Replacement Carbon Brush for Power Tool Motors
   Made by pressing a mixture of high-density graphite and a high proportion of copper powder (copper content approximately 30%-40%), and subjected to high-temperature hardening treatment, it has three core characteristics:
   • High-power adaptability: The large cross-sectional size of 10×25mm can carry larger currents (adapting to motors with power 1500-3000W), meeting the power transmission needs of heavy-duty power tools during long-term heavy-load operations;
   • Structural stability: The 25mm length provides sufficient wear allowance, and the cubic structure (25mm×25mm length and width design) maximizes the contact area with the brush holder, reducing poor contact caused by vibration and improving current conduction efficiency;
   • Enhanced wear resistance: The high-density and impact-resistant material can withstand high-frequency friction and high-temperature environments (operating temperature up to 150℃ and above), with a service life of about 1800-2500 hours, significantly better than small and medium-sized carbon brushes.
2. Compatibility Range:
   Based on the 10×25×25mm specification, it is suitable for brushed motors of various large power tools. Common compatible equipment includes:
   • Heavy-duty industrial-grade tools: such as large angle grinders, heavy-duty grinders, high-torque impact drills, industrial-grade polishers, etc.;
   • Professional operation equipment: stone cutting machines, concrete grinders, heavy-duty reciprocating saws, large electric planers, etc. (power 1500-3000W).
     The core of compatibility is that the size must completely match the inner cavity of the brush holder (with an error of ≤0.2mm). In particular, the 25mm width and length must correspond strictly to avoid installation difficulties or abnormal sparks during operation due to dimensional deviation.
3. Size Specifications: 10×25×25 MM
   This size belongs to large-sized carbon brushes. The 10mm thickness balances structural strength and installation space compatibility, while the 25mm×25mm length and width design is its prominent feature – the large contact area can disperse current load, reduce local overheating, and the 25mm length provides sufficient wear buffer for continuous operation of heavy-duty tools. The dimensional accuracy is controlled within ±0.1mm to ensure close fit with the commutator and reduce operating noise.
4. Functions and Roles:
   • Serves as the "core of power conduction" for large motors, efficiently transmitting external current to the rotor through stable contact, ensuring continuous power output of heavy-duty power tools during heavy-load operations such as cutting thick metal and grinding hard stone;
   • The large-sized design reduces current density per unit area, minimizing electric sparks, and at the same time enhances heat dissipation performance, avoiding carbon brush aging or motor damage caused by high temperatures.
5. Replacement Tips:
   The carbon brush should be replaced in time when the power tool shows the following conditions:
   • The carbon brush is worn down to less than 1/3 of its original length (about 8.3mm);
   • There are significantly more sparks at the carbon brush during motor operation, accompanied by a burning smell or abnormal vibration;
   • The output power of the tool drops sharply, such as slower cutting/grinding speed, insufficient torque, or even jamming and shutdown.