Carbon Motor Brush for Electric Grinder & Drill 5×10×16mm – Electrical Replacement Parts
This is a motor carbon brush with dimensions of 5mm×10mm×16mm (length × width × height). Specifically designed for brushed motors in small power tools such as electric grinders and drills, it belongs to the category of electrical and electronic replacement parts. It is used to replace worn carbon brushes and is a key vulnerable component ensuring the continuous and stable operation of the tools (usually provided as a set containing 2 carbon brushes of the same specification).
Key Information Analysis:
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Product Attribute: Specialized Carbon Motor Brush for Small Power Tools (as Electrical Replacement Parts)
Made by pressing a mixture of high-purity graphite and a small amount of copper powder (copper content approximately 15%-25%), it has three core characteristics:- Miniaturized adaptation: The slender cross-sectional size of 5×10mm is specially designed for compact brush holders of micro motors, adapting to the current transmission needs of low-power tools (usually with power ranging from 150-500W);
- Precise wear control: The 16mm length provides a reasonable wear allowance, balancing service life (about 600-1200 hours) and installation space constraints, avoiding internal jamming caused by excessive length;
- Low-impedance conduction: The ratio of graphite to copper optimizes contact resistance, reducing energy loss during current transmission and ensuring stable power output of power tools during fine operations (such as small-scale drilling and grinding).
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Compatibility Range:
Based on the 5×10×16mm specification, it is mainly compatible with the following equipment:- Small power tools: Such as mini electric grinders, electric drills, small grinders, handheld polishers, etc.;
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Precision equipment: Some models of electric screwdrivers, engraving machines, small cutting machines, etc. (power 150-500W).
The core of compatibility is that the cross-sectional size (5×10mm) must fit perfectly with the inner cavity of the brush holder (with an error of ≤0.1mm), and the 16mm length must strictly match the original specifications to avoid poor contact or abnormal operation noise caused by dimensional deviation.
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Size Specifications: 5×10×16mm
This size belongs to the category of micro carbon brushes. The 5mm thickness and 10mm width are suitable for the narrow and long structure of most small brush holders, and the 16mm length provides sufficient wear buffer for daily operations. The dimensional accuracy is controlled within ±0.1mm to ensure uniform contact with the commutator, reducing sparks and vibration noise during operation. -
Functions and Roles:
- Serves as the "current bridge" of small motors, stably transmitting external current to the rotor through sliding contact with the commutator, ensuring continuous power output of tools such as electric grinders and drills during light-load operations like drilling, grinding, and cutting;
- The lightweight design reduces the burden on the internal structure of the motor, making it suitable for high-frequency, short-time intermittent operation scenarios (such as home DIY and small-scale repairs).
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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 5.3mm);
- There are significantly more sparks at the carbon brush during motor operation, accompanied by a continuous "sizzling" friction sound;
- The output power of the tool decreases, such as a sudden drop in rotational speed, jamming, or even difficulty in starting (especially when unloaded).
In summary, this is a 5×10×16mm motor carbon brush, specially designed for small power tools such as electric grinders and drills. With miniaturized adaptation and stable conduction performance, it becomes a practical accessory for daily maintenance and replacement of such equipment.
