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Brush Type:

Brush Connection Type:

Brush Materials:

Thickness:

Width:

Length:

Shunt Length:

Current:

Applications / Industry:

Features:

Help with Electrical Brushes specifications:

Brush / Sliding Contact Type
   Brush Type:       
   Your choices are...         
   Solid / Single Section       Brushes consist of a single section or solid block. 
   Multi-section / Split       Split brushes consist of several sections or wafers and provide a better dynamic response (i.e. the sections provide a larger number of contact points and can conform more quickly to the commutator, especially in reversing conditions). Multi-section split brushes have greater resistance because of the internal resistance generated between individual segments. Different brush materials can be used in different sections to provide hybrid characteristics. Multi-section brushes are usually padded to evenly distribute the applied load across the sections while improving damping. Sandwich brushes are a special type of split brush in which the wafers or segments are bonded together and do not move independently. The bonding material can be an insulator, which can also polish the commutator surface. 
   Paired / Multiple Brush Set       Paired brushes consist of two separate brush blocks, usually connected together by a shunt. A tandem brush is a specialized type of paired-brush set in which the two brush pairs are contained within separate compartments of the same brush holder. 
   Specialty / Other       Other unlisted brush types or configurations. 
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   Brush Connection Type:       
   Your choices are...         
   Shuntless Brush       Shuntless brushes are brush blocks without an integral tamp or shunt. 
   Single Shunt / Wire       Brushes have only a single wire or shunt connection. 
   Multiple Wires / Shunts       Brush products have several wires or shunts connecting or attached to the brush block. 
   Tamped Connection       Tamped connections are electrical brush contacts with integral shunts or wire leads with a tamped connection to the brush. 
   Spring and Cap       Brushes are provided in the form of a spring-and-cap assembly. The tamped brush has a shunt which passes through a spring and is connected to the cap. The electrical connection is provided through the cap. Cap-and-spring brushes are used typically in fractional horsepower motors and other lower power applications. 
   Other       Other unlisted brush connection types. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Material Types
   Brush Materials:       
   Your choices are...         
   Copper Graphite       Copper graphite is a composite mixture of graphite and copper metal (~15 to 95%), resulting in a material with higher conductivity than pure graphite and lower friction or sticking than pure copper in sliding contact applications. Typically, the copper bonds the graphite together to form continuous, high-conductivity paths and a lower voltage drop. These characteristics allow copper graphite brushes to perform well under high current density and low voltage conditions.  Copper graphite is more expensive than other materials, but provides better conductivity and flexural strength than pure graphite. Copper's higher strength is useful for fabricating thin section EDM electrodes. 
   Silver Graphite (AgC)       Contact materials consist of graphite particles dispersed in a matrix of silver. Graphite has a high melting point (high refractoriness) and is insoluble in silver, resulting in superior anti-welding characteristics in high power and cycle applications such as circuit breakers. The graphite burns ups in the arcing or switching process and maintains a clean, low-resistivity contact surface. The silver typically bonds the graphite together, forming continuous high-conductivity paths and a lower voltage drop.  These characteristics allow silver graphite brushes to perform well under high current density and low voltage conditions. Silver is more oxidation-resistant than copper and can maintain cleaner contact surface during down times. 
   Silver / Silver Alloy (Ag)       Silver has the highest conductivity of all metals. The high conductivity, softness or low hardness, and high resistance to oxidation make silver an excellent choice for contact materials. Silver is strengthened with copper additions, but at the sacrifice of conductivity. Fine silver is silver with very high purity (99.99% Ag). Pure or fine silver is too soft for most commercial applications, but the material is used as a starting component to form other silver based alloys. 
   Specialty / Other       Other unlisted, specialized, or proprietary brush materials. 
   Carbon Graphite       Carbon graphite provides a cleaning action at low speeds. Carbon graphite was one of the first brush material grades developed and is found in many older motors and generators. It has an amorphous structure. 
   Graphite       Graphite brush-material grades are used in applications that require low friction. They are used at very-low current densities and very-high peripheral speeds. Graphite, flake graphite, and graphitic carbon have a hexagonal, crystalline structure that cleaves or shears easily, making graphite a soft material and effective lubricant. A form of carbon, graphite has an anisotropic hexagonal crystal structure. Graphite is the most commonly used EDM electrode material because of its good machinability, wear resistance, and low cost. Like carbon, graphite is a non-metallic substance with an extremely-high sublimation temperature which provides resistance to high-temperature arcs. Fine, grain-sized graphite tends to have better erosion and wear performance, but costs more. 
   Electrographite       Electrographite brush-materials are processed with a special high-temperature method that stabilizes the graphite. Electrographites are the most common graphite grades used in newer motors, generators, and electrical equipment. Electrographites provide good performance at higher levels of voltage, current density, and speed. 
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Specifications
   Thickness       The thickness is typically the smallest dimension of a pad, block, strip, sheet, or plate material. According to ISO, EN, or DIN brush standards, thickness is defined as the dimension tangential or in the same rotational direction as the commutator or slip ring. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Width:       This is the outer diameter (OD) or width of a component or stock-form material such as a pad, block, strip, bar, plate, or tube.  This measurement may also represent the outer diameter or width of fabricated components such as electrodes or contact tips. According to ISO, EN or DIN brush standards, the brush width is the axial dimension, parallel to the motor or generator shaft.  
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Length       This is the length of a component or stock form material such as a pad, block, strip, bar, rod, plate, or tube. Typically, length is the largest dimension of the component. According to ISO, EN or DIN brush standards, the brush length is the radial dimension, or the dimension perpendicular to the commutator or slip ring. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Shunt Length       This is the length of the shunt or wire attached to the brush block for electrical connection. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Current       The rated current is the maximum recommended current load that the material is capable of handling. For static contacts or connectors, rated current is the current that a device can carry continuously without overheating. For opening and closing contacts in devices such as circuit breakers, contactors, or switches, rated current is the current a device can carry while switching. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Applications
   Applications / Industry:       
   Your choices are...         
   Motor       Brushes designed for sliding contact applications where the contacting members providing the electrical connection or path for transmission of power or signals across a rotary interface in motors, generators or other specialized rotary electrical application. 
   OEM / New Equipment       Electrical brushes, contacts, or electrode components are designed or suitable for original equipment manufacturer (OEM) or new equipment applications. The components are often adjusted for the specific product or new equipment under development by the OEM. 
   Repair / Replacement       Electrodes, contacts, contact assemblies, or brush assemblies are designed for repair or replacement in various breakers, motors, or other electrical equipment while maintaining or improving performance characteristics. 
   Signals (Tachometers, Instrumentation)       Electrodes, brushes, or contacts are designed for transmission or pick-up of electrical signals in testing, probing, or instrumentation applications. Contacts for these applications require very low contact resistance and high reliability, such as the transmission of strain gage, thermocouple, and tachometer signals. The contacts must maintain a low contact resistance even under low power conditions to avoid the introduction of noise into the signal. Sliding contacts are used in conjunction with slip rings, conductor rails or other contact surfaces to maintain an electrical connection in mobile electrification applications. Depending on the application, sliding contacts may consist of metal contact alloy or carbon brush-type materials. In mobile electrification or rotary power applications, a carbon brush-based material is typically used. Silver alloy-based sliding contacts are used for signal or low power applications. Brushes are often described as a type of sliding contact. 
   Specialty / Other       Other proprietary, unlisted, or specialized applications. 
   Generator       Electrodes, brushes, or contacts are designed for sliding contact applications in which the contacting members that provide the electrical path slide against each other (e.g., a brush sliding against commutators or slip rings in generators). 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Features
   Features:       
   Your choices are...         
   Plated / Coated       Contact, brush, or base metals are plated or coated with a conductive material. 
   Threaded       Contacts are threaded for attachment with a riveting process. 
   Wearband / Wear Sensor       Wearband (wear band) or wear sensors are used to monitor the wear of the brush and allow replacement in a timely and controlled manner. 
   Other       Other proprietary, unlisted, or specialized features. 
   Machined       Electrical contact or electrodes are manufactured to the desired shape and dimensional specifications through a machining process. 
   MIL-SPEC Certified       Contacts meet U.S. military specifications (MIL-SPEC). 
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