The NTN UC210-D1 is a wide-inner-ring insert ball bearing intended for industrial mounted-bearing applications.

The bearing uses a 50 mm metric bore and a 90 mm spherical outside diameter, allowing it to fit into compatible spherical-seat housings.

The extended inner ring is secured directly to the shaft using two set screws, providing a simple and reliable shaft-locking method for conveyors, fans, agricultural equipment, rollers, and general industrial machinery.

The spherical OD allows the bearing to accommodate limited initial misalignment between the shaft and housing when installed in the correct bearing unit.

⚙️ Applications

• Pillow block bearing units
• Square flange bearing units
• Two-bolt flange units
• Conveyor systems
• Agricultural machinery
• Fans and blowers
• Material-handling equipment
• Packaging machinery
• Roller assemblies
• Processing equipment
• General industrial mounted-bearing systems

🎯 Benefits

✔ Standard 50 mm metric shaft bore

✔ 90 mm spherical outside diameter

✔ Wide inner-ring design

✔ Two set screws for direct shaft locking

✔ Double-sealed with slinger protection

✔ Helps retain grease and exclude contamination

✔ Relubricatable in compatible bearing-unit arrangements

✔ Suitable for common 210-series housings

✔ Cross-reference assistance available

🧠 Technical Insight

• NTN UC210-D1
• UC210 Insert Ball Bearing
• 50 mm Bore
• 90 mm Spherical OD
• 51.6 mm Inner Ring Width
• 25.5 mm Outer Ring Width
• Two Set Screw Locking
• Double Seal with Slinger
• Relubricatable Bearing

✅ Key Features

• NTN Japan Bearing
• Model UC210-D1
• UC-Series Insert Bearing
• Wide Inner Ring
• Spherical Outer Ring
• Two Set Screws
• Double-Sealed with Slinger
• Relubricatable Configuration

📊 Specifications

Brand: NTN

Model / Bearing Number: UC210-D1

Alternative Reference: UC210

Product Type: Insert Ball Bearing

Bearing Series: UC210

Bearing Type: Wide Inner Ring Insert Ball Bearing

Bore Diameter (d): 50.00 mm

Outside Diameter (D): 90.00 mm

Inner Ring Width (B): 51.60 mm

Outer Ring Width (C): 25.50 mm

Rolling Elements: Ball

Number of Rows: 1

Outer Ring: Spherical OD

Inner Ring: Wide / extended on both sides

Locking Method: Two Set Screws

Seal Type: Double-Sealed with Slinger

Seal Function: Helps exclude dust, debris, and contamination while retaining grease

Basic Dynamic Load Rating: 35,000 N / 35.0 kN according to the supplied reference data

Basic Static Load Rating: 23,200 N / 23.2 kN according to the supplied reference data

Load Capability: Primarily radial load with moderate axial-load capability depending on application and mounting

Lubrication: Grease-lubricated insert bearing

Relubricatable: Yes, when installed in a compatible relubricatable housing/unit

Internal Clearance: Verify exact NTN UC210-D1 specification if critical

Cage: Verify exact production specification

Speed Rating: Verify current NTN data for the exact operating condition

Shaft Fit: Nominal 50 mm shaft

Housing Fit: Compatible with appropriately dimensioned 210-series spherical-seat housings

Installation Consideration: Install the bearing correctly in the housing, align the shaft, tighten both set screws evenly to the recommended torque, and ensure the relubrication path is aligned where applicable

🔁 Equivalent

Suitable replacement or cross-reference candidates include:

• NTN UC210-D1
• NTN UC210
• SKF YAR 210-2F
• FYH UC210
• ASAHI UC210
• NSK UC210
• KOYO UC210
• 50 mm Bore UC210 Insert Bearing
• 90 mm OD Set Screw Insert Bearing
• UC210 Pillow Block Insert Bearing

Important Cross-Reference Consideration

A direct replacement should match more than just:

50 mm Bore + 90 mm OD

Also verify:

• Inner ring width = 51.6 mm
• Outer ring width = 25.5 mm
• Spherical OD geometry
• Set screw position and thread
• Seal / slinger configuration
• Grease-hole position
• Internal clearance
• Load rating
• Speed capability
• Housing compatibility

(Always verify the complete UC210-D1 specification before replacing it with another brand.)

UC210-D1 vs Inch-Bore UC210 Versions

The standard UC210-D1 uses:

50.00 mm bore

NTN also produces inch-bore versions in the same general UC210 family.

For example:

UC210-115D1 → 1-15/16 in bore

Therefore, the shaft size must always be checked before ordering, even when the outer bearing body appears identical.

Double Seal with Slinger

The sealing system combines contact sealing with a rotating slinger, providing an additional barrier against:

• Dust
• Dirt
• Fine debris
• Grease loss
• External contamination

This makes UC210-D1 well suited to conveyors, agricultural equipment, and general industrial environments where contamination protection is important.

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for pillow blocks, flange units, conveyors, fans, agricultural machinery, rollers, material-handling systems, packaging machinery, and industrial equipment requiring a 50 mm set-screw insert bearing with 90 mm spherical OD.

📲 Contact via LINE ID: dusitrea

📧 Email: sales@seal4go.com

💬 Technical support available before ordering

🔍 Assistance available for cross-reference and equivalent part identification