6.2 X 12.5 X 18 mm Electric Drill Grinder Carbon Brush Set

6.2×12.5×18 mm Electric Drill Grinder Carbon Brush Set Replace Parts

Key Information Analysis:

1. Product Attribute: Carbon Brush Set for Electric Drill/Grinder Replace Parts
   Made by pressing a mixture of high-density graphite and an appropriate amount of copper powder (copper content approximately 25%-35%), it has three core characteristics:
   • Precise adaptability: Optimized design for high-frequency vibration tools like electric drills and grinders, with a stable structure to reduce carbon brush displacement or breakage caused by vibration;
   • Efficient conductivity: The uniform distribution of copper powder improves current conduction efficiency, reduces contact resistance, minimizes motor heating, and extends the service life of the tool;
   • Set design: Includes 2 carbon brushes of the same specification to ensure simultaneous replacement of both sides of the motor, maintaining current balance and avoiding power reduction caused by one-sided wear.
2. Compatibility Range:
   Based on the 6.2×12.5×18mm specification, it is suitable for brushed motors of various small and medium-sized electric tools. Common scenarios include:
   • Electric drills: Impact drills, pistol drills, rechargeable electric drills, etc. (power 400-1000W);
   • Grinding tools: Angle grinders, straight grinders, grinders, etc. (power 500-1200W);
   • Other equipment: Some models of electric planers, jigsaws, small 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 width (12.5mm) and thickness (6.2mm) must fit precisely to avoid loose installation or poor contact.
3. Size Specifications: 6.2×12.5×18 mm
   This size belongs to the category of small and medium-sized carbon brushes. The length of 18mm provides a reasonable wear allowance (service life is about 1000-1500 hours) and is suitable for most standard brush holder structures. The dimensional accuracy is controlled within ±0.1mm to ensure tight contact between the carbon brush and the commutator, reducing sparks and noise during operation.
4. Functions and Roles:
   • Serves as the "current conduction hub" of the electric tool motor, stably transmitting external current to the rotor to ensure the tool's power output during high-speed rotation or heavy-load operations;
   • The self-lubricating property of graphite can reduce wear on the commutator, lower motor operating noise, and maintain the stability and working efficiency of the tool.
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 6mm);
   • There are significantly more sparks at the carbon brush during motor operation, accompanied by a "sizzling" abnormal sound;
   • The output power of the tool decreases, such as slower drilling speed or reduced grinding efficiency.