Replacement Carbon Brush 6.3*11*17/20 MM Carbon Brushes

Spare Parts Replacement Carbon Brush 6.3×11×17/20 MM Carbon Brushes

Key Information Analysis:

1. Product Attribute: Replacement Carbon Brush as Spare Parts
   Made by pressing a mixture of high-purity graphite and an appropriate amount of metal powder (such as copper and tin), it has two core characteristics:
   • Dual-length adaptability: The same cross-sectional size (6.3×11mm) is paired with two lengths of 17mm and 20mm, covering more installation space requirements caused by differences in equipment models and brands, thus improving the versatility of spare parts;
   • Balanced performance: With a copper content of about 20%-30%, it balances conductivity and wear resistance, adapting to motor working conditions such as continuous operation and high-frequency start-stop. Its service life is about 1000-1600 hours, reducing replacement frequency.
2. Compatibility Range:
   Based on the 6.3×11×17/20mm specification, it is suitable for various small and medium-sized brushed motors. Common compatible equipment includes:
   • Power tools: Such as light electric drills, sanders, small angle grinders, jigsaws, etc. (power 300-1000W);
   • Household appliance motors: Vacuum cleaner motors, small water pump motors, drive motors for kitchen appliances, etc.;
   • Light industrial auxiliary equipment: Small conveying motors, ventilation equipment motors, etc.
     The core of compatibility is that the cross-sectional size (6.3×11mm) must completely match the brush holder (with an error of ≤0.2mm). The 3mm length difference between 17mm and 20mm is used to distinguish different installation depths, which must strictly correspond to the length of the original carbon brush to avoid jamming due to excessive length or poor contact due to insufficient length.
3. Size Specifications: 6.3×11×17/20 MM
   This size belongs to small and medium-sized carbon brushes. The 6.3mm thickness and 11mm width are suitable for most compact-structured brush holders. The two length specifications correspond to "short-stroke" and "long-stroke" installation spaces respectively – 17mm is suitable for small motors with limited space, and 20mm is suitable for equipment requiring more wear allowance. The dimensional accuracy is controlled within ±0.1mm to ensure uniform contact with the commutator and reduce operating sparks.
4. Functions and Roles:
   • As the "current conduction component" of the motor, it stably transmits external current to the rotor through sliding contact with the commutator, ensuring normal startup and power output of the equipment;
   • The dual-length design reduces the complexity of spare parts procurement, making it suitable for maintenance personnel or household users to meet the replacement needs of different equipment and improve maintenance efficiency.
5. Replacement Tips:
   The carbon brush should be replaced in time when the equipment shows the following conditions:
   • The carbon brush is worn down to less than 1/3 of its original length (about 5.7mm for the 17mm specification and about 6.7mm for the 20mm specification);
   • There are significantly more sparks at the carbon brush during motor operation, accompanied by a burning smell or abnormal noise;
   • The output power of the equipment decreases, such as reduced rotational speed, insufficient power, or even difficulty in starting.