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Commutator Conditions: Problems and Causes
The commutator should have a smooth film and consistent color. The film should be from light to dark brown. A streaky film is often a warning that the commutator might thread. If this is the case, fine copper dust will be found on the brushes and brush rigging. Bar marking, where some bars are lighter…
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Helwig’s Carbon Brushes, A guide for Elevator Technicians
Over the years, manufacturers, contractors and brush suppliers have searched for the “magic” dustless brush grade or that impossible, frictionless material. There is no magic brush grade, but you can maximize brush life and equipment performance by taking the appropriate steps: Check that there is proper spring pressure. Check for proper current density. Check on…
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Helwig Carbon’s Comprehensive Guide for Industrial and Railway Technology
The name “brushes” comes from bundles of tiny copper wires, which were used as elastic contacts at the starting period of the electrical engineering industry. The term “carbon brush” appeared with the change to materials made out of graphite and carbon. Carbon brushes have been developed for several decades: they are also indispensable hardware for…
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Helwig Carbon Brushes for the Mining Industry
Helwig Carbon Products has been servicing the mining industry since 1928, when they first started manufacturing carbon brushes. To learn more, click the link below. Helwig Carbon’s Mining Industry Sheet
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Lift Truck Brushes by Helwig Carbon
Helwig Carbon stocks 27 different lift truck brushes, available for same day shipping. For more information, click the link below. Helwig Lift Truck Brush Brochure
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How to Order a Carbon Brush
Need help identifying brush problems or determining the correct carbon brush for your application? Click the link below to download a guide to help you determine the carbon brush you need. Identify Brush Problems
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Helwig Carbon’s HCP™ Sensor
Worn carbon brushes cause commutator damage. Carbon brushes are worn down by use. If the brush becomes too short there is a risk of electrical wear to the contact surface, primarily caused by arcing and sparking. This results in serious damage to the commutator and the motor. It is important to replace worn brushes before…
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Helwig Carbon Celebrates 85 Years of Innovations
The technical product innovations developed by Helwig Carbon Products have received universal acceptance over many decades, have been copied by carbon brush manufacturers world-wide, and are still in use today. There is no question that the development of carbon brushes was key to the future of electrical machines as the primary drive system of the…
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Helwig Carbon’s Brushes and Holders for Elevator Applications
When asked about the most common complaint from elevator technicians regarding carbon brushes, the answer is dusting. It often results from low average current densities, which is common to elevator generators. Helwig Carbon discusses this and the myth of “magic grades,” if you are interested in reading further, click the link below. Carbon Brushes and…
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The Helwig Commutator Condition Guide
Helwig Carbon’s Commutator Condition Guide shows you how to avoid costly motor and generator repairs and unscheduled downtime by recognizing possible problems before they cause serious damage. Two major indicators of possible problems are: commutator irregularities and inconsistent film formation. To learn more, click on the link below. Commutator Condition Guide Brochure
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Your Source for Untreated Cotton Canvas
We now have in stock 3-inch untreated canvas.Specifications: Natural, untreated, class 1, 3-inch wide, type 3N, 1560 minimum breaking strength in pounds, in accordance with government specifications MIL-W-530E and MIL-T-43566. Have any questions call Tracy at 253-853-7456 Click here to download canvas order spec sheet
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Martindale Commutator Grinders
Martindale’s Commutator Grinders are a complete line of commutator grinding tools. The three salient factors in choosing a commutator resurfacing tool are: 1. Commutator bar length (or width of slip ring) matched to grinding capacity of the tool. 2. Access area matched to dimensions of tool to ensure working clearance. 3. Diameter of brush stud…
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Specialty Motor Repair Equipment
Looking for a demagnetizer or electric etcher, or perhaps you need an air grinder or coil winding equipment for your motor repair job. Browse through Martindales extensive line of specialty motor repair equipment. Click here to download Martindale’s specialty catalog
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Saws
Need a specialized saw blade? Browse through Martindale’s extensive line. Click here to download Martindale Saws Catalog
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Rotary Burs and Rotary Finning Burs
Need to find the right bur for your motor repair job? Browse through the Martindale Catalog, they have high speed steel (used extensively in the casting industry) and carbide burs, by far the most popular for stators and armatures. Click here to download Martindale burs catalog
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Commutator Undercutters
Need a specialty undercutter for your motor maintenance. Browse through Martindale’s many varieties ranging from hand held models to lathe models. Click here to download Martindale undercutter catalog
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Abrasives for Total Commutator Maintenance
Looking for something to resurface your commutator? Browse through the Martindale Diamond D Products catalog to find the product to fit your needs. Click here to download Martindale Diamond D catalog
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Commutator Grinding Tools
Looking for the right tool for the job? Browse through Martindale’s comprehensive grinder catalog. Click here to download Martindale Grinder Catalog
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