Quick answer

Q: Which material is best for full ceramic bearings?

A: -’s MEGAOHM range of insulated bearings is designed to stop stray currents before they shorten the life of motor bearings. Electrical erosion, premature wear and unplanned machine downtime: parasitic currents can have a significant impact on the serv.

In detail

Electrical erosion, premature wear and unplanned machine downtime: parasitic currents can have a significant impact o. Know-How -’s MEGAOHM range of insulated bearings is designed to stop stray currents before they shorten the life of motor bearings. Electrical erosion, premature wear and unplanned machine downtime: parasitic currents can have a significant impact on the service life of bearings.

In a new expert explainer, Etienne Vandamme, project manager and research and innovation specialist at -, walks through the main insulation solutions available today and explains how the company’s MEGAOHM range helps safeguard electrical applications. Where the damage comes from The widespread use of variable frequency drives (VFDs) has made electric motors more efficient and easier to control, but it has also brought a side effect. VFDs can generate high-frequency eddy currents and stray currents that find their way to earth through the motor bearings.

When these currents pass between the rolling elements and the raceways, they cause electro-erosion. The result is pitting and cracking on the contact surfaces and a breakdown of the lubricant, which - identifies as the second leading cause of bearing failure. Over time, this shortens bearing life, can lead to motor failure and drives up maintenance costs.

Comparing the insulation options There is no single answer to stray currents, and - sets out the main approaches side: Conductive greases dissipate the current, but their electrical efficiency is low and unstable. Resin-insulated bearings perform up to 1,000 V, but are not suitable above 120 °C. Hybrid bearings offer complete and permanent insulation and are typically chosen for electric vehicles, high-speed and aerospace applications.

Ceramic-coated bearings, such as the MEGAOHM range, provide high-level insulation in a bearing that drops straight into a standard housing. How MEGAOHM works MEGAOHM bearings are fitted with a thick alumina ceramic coating on the outer surface of the outer ring. This layer acts as an insulating barrier, preventing current from passing through the bearing in the first place.

According to -, the coating offers electrical resistance up to 3,000 VDC, compared with 1,000 VDC for standard solutions. The bearings are manufactured to ISO 492, DIN 620 and JIS 1514 standards and are available with steel or brass cages depending on motor size. Because their dimensions match those of standard bearings, MEGAOHM units are fully interchangeable, so no redesign of the motor or housing is needed.

- also holds the range in stock, which helps maintenance teams respond quickly when a motor needs attention. Typical applications The range targets motors fitted with variable speed drives, as well as: AC and DC motors and servomotors Pumps, fans and compressors Wind turbines and generators - positions MEGAOHM primarily for motor winding technicians and maintenance engineers looking to extend the service life of both bearings and motors. Expertise behind the range Vandamme’s work in this field goes beyond insulated bearings.

He is the named inventor on an - patent for an instrumented bearing that incorporates a leakage current collector and a magnetic shield, addressing the risk that leakage currents disrupt or damage the sensors fitted to modern bearings. Find out more HERE. How KMK Bearing Applies This At KMK Bearing (SINO BEARINGS, KMK brand) these principles guide the bearings in Chengdu, China.

Our process chain - material selection, heat treatment, precision grinding, superfinishing and cleanroom assembly - is built to the standards described above, whether for a standard catalog part or a custom-engineered solution. 20+ years of precision bearing manufacturing - annual capacity of 3,000,000 sets Large finished-goods and semi-finished stock for very short lead times Materials from chrome steel (GCr15) to 17-4PH stainless steel and full ceramic (ZrO2, Si3N4) In-house heat treatment and metrology to P4/P2 (ABEC 7/9) precision; ISO 9001 & CE certified Flexible moq based on product value and production status - custom designs from drawings or samples Exporting to 30+ countries Discuss your application with kevin@sinoti.com or browse our bearing catalog. SINO BEARINGS (KMK) - Perfect Quality -- Great Service -- Customized.

Related questions

What do precision classes mean for full ceramic bearings?

Electrical erosion, premature wear and unplanned machine downtime: parasitic currents can have a significant impact o. Electrical erosion, premature wear and unplanned machine downtime: parasitic currents can have a significant impact on the service life of bearings.

How is the service life of full ceramic bearings determined?

Leakage Currents: How Can We Protect the Bearings in Electric Motors? -’s MEGAOHM range of insulated bearings is designed to stop stray currents before they shorten the life of motor bearings.

Why is heat treatment critical for full ceramic bearings?

-’s MEGAOHM range of insulated bearings is designed to stop stray currents before they shorten the life of motor bearings. Know-How -’s MEGAOHM range of insulated bearings is designed to stop stray currents before they shorten the life of motor bearings.

How KMK Bearing Applies This

At KMK Bearing (SINO BEARINGS, KMK brand) these principles guide the bearings we manufacture in Chengdu, China. Our process chain - material selection, heat treatment, precision grinding, superfinishing and cleanroom assembly - is built to the standards described above, whether for a standard catalog part or a custom-engineered solution.

• 20+ years of precision bearing manufacturing - annual capacity of 3,000,000 sets
• Large finished-goods and semi-finished stock for very short lead times
• Materials from chrome steel (GCr15) to 17-4PH stainless steel and full ceramic (ZrO2, Si3N4)
• In-house heat treatment and metrology to P4/P2 (ABEC 7/9) precision; ISO 9001 & CE certified
• Flexible moq based on product value and production status - custom designs from drawings or samples
• Exporting to 30+ countries

Discuss your application with kevin@sinoti.com or browse our bearing catalog.

SINO BEARINGS (KMK) - Perfect Quality -- Great Service -- Customized.

Source: Bearing News