Flexible Carbon Brush Shaft with Grounding Ring for Motor Bearing Protection

Product Overview

Volsun VS-RD Series Shaft Grounding Rings

Description
VS-RD series shaft grounding rings are composed of conductive fibers and metal bodies and are used for electric corrosion protection of variable frequency motors and their coupling equipment. VS-RD series conductive rings can reduce the potential induction between the bearing and the grounded chassis, effectively solve the phenomenon of electrical corrosion caused by shaft current, and protect the bearing from damage

Features

* Low resistance

* High temperature resistance

* Durable and wear-resistant

* Unique structure

* Environmentally friendly and non-toxic

* Size can be customized

Support customization, ODM & OEM available

Click to contact us for free samples

VR

PRODUCT SPECIFICATIONS

Item	Test Data	Test Standard
Static resistance	＜1Ω	/
Dynamic resistance	≤10Ω	/
Fiber pull-off force	≥100·30s	/
Salt spray test	No fiber damage	/
Durability test	A3	/
High temperature test	≥120h	/
Low temperature test	≥15times	/

Structure

Dimensions

O. D mm	Id mm	Height mm	Applicable shaft diameter mm
30	15	7	10
38	19	7	13
38	22	7	18
40	24	7	18
47	31	7	25
49	32	7	26
50	30	7	24
50	31	7	25
53	30	7	25
53	36	7	30
55	39	7	35
57	36	7	30
60	44	7	38
62	41	7	35
70	46	7	40
72	49	7	43
75	58	7	52
78	58	7	52

Note：Special size and packing are available as request

Application Pictures

Company Show

Suzhou Volsun Electronics Technology Co., Ltd. was founded in 2006. We keep focusing on the R&D, production and sales in insulation, sealing & protection solutions
Volsun has a modern quality management system, which has passed a series of quality system certification such as IATF16949, ISO9001 etc
Up to now, Volsun cooperated with customers from 88 countries, we offer suitable sealing, waterproof solutions for some well-know enterprises in communication, Automobile, Power industry etc

Certifications

Abroad Exhibition

Las Vagas AAPEX

Moscow Expo

Hannover Messe

Packaging and Shipping

FAQ

Q 1. How long is the payment term
A: We accept T/T 50% deposit and 50% balance against B/L or L/C copy at sight, also accept Western Union, VISA and Paypal

Q 2. What is the normal lead time for product orders
A: The average lead time for prototype/first piece is 7~10 days, if tooling is involved, the lead time for production tooling is 10 days, and the average production time after sample approval is 2-3 weeks

Q 3. What is your standard packaging
A: All goods will be packed in cartons and loaded on pallets. Special packing methods are acceptable when needed

Q 4. Can you tell us the monthly production capacity of your products
A: It depends on the model, we produce more than 1500 tons of rubber materials per month

Q 5. What kind of certificates do you have
A1: We have ISO9001:2015, IATF16949:2016, ISO14001:2015, ISO45001:2018 certified
A2: We have various rubber compounds approved by UL, ROHS and REACH

Q6: How to check the quality of bulk order
A1: We provide pre-production samples to all customers before mass production if needed
A3: We accept third-party inspection, such as SGS, TUV, INTERTEK, BV, etc

Q 7: Can you provide customized service
A: Yes, we accept customization and can produce products in different sizes, packaging, colors according to requirements

Volsun presents the Flexible Carbon Brush Shaft with Grounding Ring for Motor Bearing Protection, a precision-engineered solution designed to extend equipment life, reduce maintenance, and improve electrical performance in rotating machinery. This flexible carbon brush shaft with grounding ring brush shaft assembly is specifically developed to address the persistent challenge of shaft currents and bearing damage, providing comprehensive motor bearing protection for a wide range of industrial applications. By integrating a flexible carbon brush, grounding ring brush shaft geometry, and Volsun grounding brush expertise, this product offers reliable grounding, simplified installation, and long-term performance benefits for users across multiple sectors

At the heart of the design is the flexible carbon brush, manufactured from high-quality carbon materials and compounded specifically for conductivity, wear-resistance, and conform ability. The flexible carbon brush conforms to shaft irregularities and compensates for misalignment, assuring continuous contact and efficient current transfer. This dependable contact is essential for motor bearing protection: by diverting shaft currents away from bearings, the grounding ring brush shaft assembly significantly reduces fluting, pitting, and electrical erosion. Volsun grounding brush integration ensures that current is shunted safely to ground, preventing potential damage to bearings and the associated costly downtime

Innovative engineering and material science drive the performance advantages of this grounding ring brush shaft solution. The flexible carbon brush combines elasticity with a controlled resistivity profile to avoid sparking and overheating while maintaining a low-contact resistance path to ground. The grounding ring brush shaft structure includes a precision-machined ring carrier that facilitates even distribution of brush contact around the shaft circumference. This uniform contact distribution minimizes localized heating and uneven wear, promoting extended service intervals and consistent motor bearing protection. The combined system reduces electromagnetic interference and stabilizes shaft voltage levels, adding another layer of protection to rotating components

Applications for the flexible carbon brush shaft with grounding ring are broad and impact Industrial motors in pumps, compressors, fans, and conveyors commonly experience shaft currents due to inverter drives, variable frequency drives (VFDs), and stray capacitances. These currents can travel through bearings, causing premature failure. Installing a Volsun grounding brush as part of a grounding ring brush shaft assembly provides a direct path for unwanted current to bypass bearings and discharge safely. The solution is equally applicable to generators, alternators, and other rotating electrical machines where motor bearing protection is critical. Renewable energy systems, such as wind turbine nacelles and hydroelectric generators, benefit from the added protection against shaft current-induced bearing damage. Heavy industries including mining, steel, cement, and petrochemical facilities will also see improved reliability and reduced maintenance costs by integrating Volsun’s flexible carbon brush systems

One notable advantage of the flexible carbon brush is adaptability. The brush material’s flexibility allows it to be custom-shaped and sized for specific shaft diameters and operational conditions. This customization supports precise contact force management, which is essential for longevity and performance. As part of a grounding ring brush shaft assembly, these brushes can be installed in ring carriers that support multiple brushes, providing redundancy and consistent contact even as individual brushes wear. Such modularity simplifies field replacement and reduces mean time to repair. The Volsun grounding brush product line embraces versatile mounting options, from clamp-on ring carriers to welded or bolted configurations, enabling retrofitting on existing equipment with minimal downtime

Thermal stability and wear behavior are critical considerations for any grounding solution. Volsun’s flexible carbon brush materials are formulated to maintain stable electrical properties over a wide temperature range, resisting oxidation and degradation that can compromise contact performance. The grounding ring brush shaft assembly is designed for minimal frictional heating and controlled wear rates, which translates to predictable maintenance intervals and lower total cost of ownership. When combined with routine inspection and timely brush replacement, the Volsun grounding brush system contributes to a proactive maintenance strategy, avoiding unplanned outages and costly bearing repairs

Installation and maintenance are simplified by the grounding ring brush shaft’s serviceable design. The ring carriers allow for quick access to brushes without removing the motor or decoupling the shaft in many cases, enabling fast brush changes during scheduled maintenance windows. The flexible carbon brush’s form factor supports easy handling and fitting, while robust retention mechanisms keep brushes secure under vibration and dynamic loads. Clear installation instructions and compatibility with common motor configurations make the Volsun grounding brush assembly a practical choice for maintenance teams aiming to implement motor bearing protection measures with limited resources

From a safety and compliance perspective, the grounding ring brush shaft contributes to better electrical grounding practices within industrial systems. Diverting shaft currents away from bearings reduces the risk of unexpected failures that could compromise personnel safety and equipment integrity. The controlled discharge path provided by the flexible carbon brush and ring carrier meets industrial grounding standards and complements other grounding strategies in an electrical installation. Volsun grounding brush products are manufactured under quality control processes to ensure consistent performance, traceability, and conformance to customer specifications

Performance metrics for the flexible carbon brush shaft with grounding ring include low contact resistance, high current-carrying capability, and long operational life under typical industrial loads. Field studies and laboratory testing have demonstrated measurable reductions in bearing current levels when a properly installed grounding ring brush shaft is used, proving its efficacy for motor bearing protection. Customers deploying Volsun grounding brush systems report extended bearing life, fewer emergencies, and reduced inventory of spare bearings. The economic benefits of eliminating repeated bearing replacements and unscheduled downtime make the investment in a grounding ring brush shaft compelling for reliability-focused operations

In summary, Volsun’s Flexible Carbon Brush Shaft with Grounding Ring for Motor Bearing Protection is a practical, high-performance solution engineered to tackle shaft current problems and extend bearing life across a wide range of rotating machinery. The product’s combination of flexible carbon brush materials, grounding ring brush shaft design, and Volsun grounding brush manufacturing excellence delivers reliable grounding, easy installation, low maintenance, and measurable protection for bearings. For plants facing recurring bearing failures, upgrading to this flexible carbon brush and grounding ring suite offers a clear path to improved uptime and reduced lifecycle costs. Choose Volsun grounding brush solutions to protect your motors, preserve bearings, and enhance the reliability of your rotating assets