Electric Tool Spare Parts 7*19*15/16 MM Carbon Brush

High Quality Electric Tool Spare Parts 7×19×15/16 MM Carbon Brush

Key Information Analysis:

1. Product Attribute: High-Quality Carbon Brush as Electric Tool Spare Parts
   Made by precision mixing and pressing high-purity flake graphite with high-purity copper powder (copper content approximately 35%-45%), and subjected to high-temperature curing treatment, it has three core characteristics:
   • Excellent durability: The material density is more than 30% higher than that of ordinary carbon brushes, with outstanding wear resistance. It can withstand friction loss from high-frequency, long-term operation of electric tools, with a service life of 1500-2200 hours;
   • Dual-length precise adaptability: The same cross-sectional size (7×19mm) is paired with two lengths (15mm and 16mm), and the small 1mm length difference can precisely match the installation depth caused by differences in brush holder designs of tools from different brands or models, improving the versatility of spare parts;
   • Low-spark characteristic: The scientific ratio of graphite and copper reduces contact resistance during current transmission, minimizing electric sparks between the commutator and the carbon brush, lowering the risk of motor overheating and extending the overall service life of the tool.
2. Compatibility Range:
   Based on the 7×19×15/16mm specification, it is suitable for brushed motors of various medium and large electric tools. Common compatible equipment includes:
   • Professional-grade electric tools: such as heavy-duty angle grinders, large grinders, high-torque impact drills, industrial-grade polishers, etc. (power 800-2000W);
   • Heavy-duty operation equipment: stone cutting machines, concrete grinders, large reciprocating saws, etc.
     The core of compatibility is that the cross-sectional size (7×19mm) must fit perfectly with the inner cavity of the brush holder (with an error of ≤0.1mm). The 15mm and 16mm length specifications correspond to the installation spaces of different devices respectively, and must strictly match the length of the original carbon brush to avoid poor contact or abnormal operation noise caused by dimensional deviation.
3. Size Specifications: 7×19×15/16 MM
   This size belongs to medium and large carbon brushes. The 19mm width provides a larger current conduction area, adapting to the high current demand of medium and high-power motors; the 7mm thickness balances structural strength and installation space compatibility; the 15mm and 16mm length designs reserve reasonable wear allowance for different devices – 15mm is suitable for compact-structured motors, while 16mm is suitable for heavy-duty tools requiring a longer wear cycle. The dimensional accuracy is controlled within ±0.05mm to ensure uniform contact with the commutator, reducing operating noise.
4. Functions and Roles:
   • Serves as the "core of power conduction" for electric tool motors, efficiently transmitting external current to the rotor through stable contact, ensuring continuous power output of the tool during heavy-load operations (such as cutting thick metal, grinding hard stone);
   • The high-quality material has excellent heat dissipation performance, which can quickly dissipate heat generated by friction, avoiding softening or fragmentation of the carbon brush due to high temperature and maintaining the stability of the tool.
5. Replacement Tips:
   The carbon brush 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 5mm for the 15mm specification and about 5.3mm for the 16mm specification);
   • There are significantly more sparks at the carbon brush during motor operation, accompanied by an abnormal burning smell;
   • The output power of the tool decreases, such as a sudden drop in rotational speed, significantly reduced cutting/grinding efficiency, or even jamming.