NSK 6203DDUCM NS7S

NSK 6203DDUCM NS7S Deep Groove Ball Bearing

Description

This is a high-performance single-row deep groove ball bearing from NSK’s HPS (High Performance Standard) series. The 6203DDUCM NS7S is engineered for applications demanding high reliability and long operational life. It features DDU contact seals on both sides, providing excellent protection against contamination and moisture ingress. The CM radial internal clearance makes it particularly suitable for use in electric motors and other applications where reduced operational noise and vibration are critical.

Specifications

• Manufacturer: NSK
• Part Number: 6203DDUCM NS7S
• Type: Single-Row Deep Groove Ball Bearing
• Bore Diameter (d): 17 mm
• Outer Diameter (D): 40 mm
• Width (B): 12 mm
• Seals: DDU (Contact rubber seals on both sides)
• Internal Clearance: CM (For electric motors)
• Grease: NS7S
• Series: NSKHPS

Label Info

• Brand: NSK
• Model: 6203+DDUCM NS7S
• Series: NSKHPS

Application

Designed for a wide range of industrial applications including electric motors, pumps, gearboxes, fans, and conveyor systems where durability and protection from contaminants are essential.

Country of Origin

Made in Japan.

CO2 Impact

By purchasing this refurbished component, you contribute to a circular economy and avoid approximately 0.13 kg of CO2 emissions compared to a new production. This saving is equivalent to charging a smartphone more than 15 times.

Availability

This item is in stock and ready for dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What do the suffixes ‘DDU’ and ‘CM’ mean for this NSK bearing?
‘DDU’ indicates that the bearing is fitted with contact rubber seals on both sides, offering excellent protection against dust and moisture. ‘CM’ refers to a specific radial internal clearance range that is optimized for electric motor applications, helping to reduce noise and vibration.

Is the NS7S grease suitable for high-temperature applications?
NS7S is a high-quality, low-noise grease with a standard operating temperature range, typically from -30 deg C to +110 deg C. For applications exceeding this range, a bearing with a different grease type would be recommended.

Can this 6203DDU bearing be used as a direct replacement for a 6203-2Z or 6203-ZZ bearing?
Yes, dimensionally it is a direct replacement. However, the sealing is different. A ‘ZZ’ or ‘2Z’ bearing has non-contact metal shields, which offer less protection against fine dust and moisture than the ‘DDU’ contact seals. For dusty or wet environments, upgrading to a DDU bearing is beneficial.

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Last Update: Friday, March 13, 2026