The NSK 6210CM Deep Groove Ball Bearing is a precision single-row deep groove bearing engineered for smooth rotation under radial and moderate axial loads. Manufactured by NSK Japan, it delivers reliable performance for automotive accessory drives, industrial machines, and general mechanical applications where a 50 × 90 × 20 mm bearing is required.

Technical Specifications

This bearing is built to NSK’s standard internal clearance for general-purpose applications.

Product Overview

Deep groove ball bearings are one of the most versatile and widely used bearing types. Their uninterrupted raceway grooves allow them to support radial loads and axial loads in both directions, while providing low friction, quiet operation, and high-speed capability.

The 6210CM model from NSK is an open bearing (no shields/seals), suitable for installations where external sealing and lubrication are applied by design.

Where It’s Used

The NSK 6210CM is chosen wherever a bearing with 50 × 90 × 20 mm dimensions and robust load support is required. It’s dimension-matched — not vehicle OEM-specific — meaning you select it based on bearing code or size rather than a fixed list of makes or models.

🔩 Common Automotive / Vehicle Uses

This size bearing is frequently found (depending on OEM design) in:

• Alternator shafts

• Starter motor drives

• Tensioner & idler pulleys

• Water pump pulleys

• Transmission outputs

• Accessory drive shafts

📌 To confirm whether this exact bearing fits a specific car model/year:

1. Check the service manual for the bearing dimensions or OE code specified.

2. Inspect the bearing stamp or code on the old part.

3. Match both with 50×90×20 and the part number 6210CM before ordering.

Because vehicles refer to bearings by OEM code, not by bore-OD-width alone, fitment varies by make/model/year and specific assembly — always verify dimension and code before replacement.

Industrial & Machine Uses

The 6210CM is also common in:

• Electric motors & generators

• Gearboxes & reducers

• Pumps and compressors

• Fans and blowers

• Conveyors & rollers

• Factory automation equipment

Deep groove bearings are one of the most ubiquitous bearing types due to their adaptability and performance.

Related Brand/Equivalent Part Numbers

Here are dimension-matched equivalents from other leading bearing manufacturers (same 50×90×20 mm size, but check seal type and internal clearance before use):

• SKF: 6210, 6210-2Z, 6210ZZ (open/shielded)

• NTN: 6210CM deep groove ball bearing (open type)

• FAG: 6210 series deep groove bearings

• KOYO: 6210 series (open, shielded, sealed options)

• Timken: 6210 deep groove bearings

Alternative sealed options (if contamination protection is required):

• 6210-2RS / 6210LLU / 6210DDU (rubber sealed)

• 6210ZZ / 6210-2Z (metal shielded)

Fitment & Selection Tips

✔ Verify dimensions first: ID 50 mm × OD 90 mm × Width 20 mm.
✔ Check seal/shield needs: Open (CM) for external lubrication; sealed/shielded variants if dust/moisture protection is needed.
✔ Match OEM code from parts manual to ensure correct application in automotive use.
✔ If bearing runs in an enclosed housing, consider adding seals/shields at assembly.