+86 15806631151 info@sdtflbearing.com
The 6217-M-C4-SQ77 is an electrically insulated ball bearing with an 85mm bore and 150mm outer diameter, designed to prevent electrical currents from damaging machinery. Its outer ring features a special coating (SQ77) that provides insulation, with a breakdown voltage of 1000-3000V.
This bearing handles dynamic loads up to 87.1 kN and spins smoothly at speeds up to 9000 RPM. The brass cage ensures durability, while the C4 radial clearance allows for thermal expansion in demanding conditions.
The insulation layer (100-500µm thick) offers high electrical resistance (50-200 MΩ), making it ideal for electric motors or generators. Weighing 1.82kg, it’s robust yet manageable for its size.
Compliant with RoHS standards, this NKE model is a reliable choice for applications where electrical insulation is critical, such as wind turbines or industrial drives.
"*" indicates required fields
How Is 6217-M-C4-SQ77 Bearing Engineered for Reliability?
6217-M-C4-SQ77 Bearing features an insulating coating on the outer ring, preventing electrical damage in high-voltage environments.
The brass cage ensures smooth operation, even at high speeds up to 9,000 r/min.
With a basic dynamic load rating of 87.1 kN, it handles heavy loads reliably.
The C4 radial internal clearance allows for thermal expansion, maintaining performance under varying conditions.
Its breakdown voltage ranges from 1,000 to 3,000 V, making it suitable for electrically demanding applications.
The coating thickness of 100~500 µm provides consistent insulation without compromising durability.
Industrial Uses of 6217-M-C4-SQ77 Bearing
This bearing is commonly used in electric motors and generators, where its insulation coating prevents electrical currents from causing damage. The brass cage ensures smooth rotation even under high speeds.
In wind turbines, 6217-M-C4-SQ77 Bearing handles both radial and axial loads while resisting electrical arcing. Its C4 clearance allows for thermal expansion in demanding environments.
For railway applications, this bearing’s high breakdown voltage makes it ideal for traction motors. The SQ77 coating provides reliable insulation against stray currents.
Where Is 6217-M-C4-SQ77 Bearing Used?
You’ll find it in industrial pumps, where the insulation coating protects against electrolytic corrosion. The 150 mm outer diameter fits standard pump housings perfectly.
Built for Heavy-Duty Use: 6217-M-C4-SQ77 Bearing
In steel mills, this bearing withstands both electrical interference and heavy loads. The 28 mm width provides stability in high-vibration environments.
Medical vs Industrial: Where 6217-M-C4-SQ77 Bearing Excels
While not for medical use, it shines in factory automation equipment requiring electrical insulation. The 85 mm bore suits various motor shaft sizes.
How Does 6217-M-C4-SQ77 Bearing Improve Performance?
By eliminating electrical pitting, it extends service life in variable frequency drives. The 9000 r/min speed rating keeps operations efficient.
In conveyor systems, 6217-M-C4-SQ77 Bearing reduces downtime caused by current leakage. The 1.82 kg weight balances durability and ease of installation.
"*" indicates required fields