The MRC 215MFF is a maximum-capacity single-row radial ball bearing designed for applications where radial load is the dominant load.

Its principal dimensions are:

75 × 130 × 25 mm

which correspond dimensionally to:

6215

However, the internal geometry is different from a conventional 6215.

The MRC 200-M Series uses a filling-slot / maximum-capacity construction, allowing a larger ball complement than a standard Conrad-type deep groove ball bearing.

This provides higher radial-load capability, but the filling slots reduce axial-load capability compared with a standard non-filling-slot bearing.

The FF execution provides protection on both sides and is commonly associated with a double metal shielded arrangement in this MRC family.

⚙️ Applications

• Heavy-duty electric motors
• Industrial gearboxes
• Pumps
• Fans and blowers
• Conveyor systems
• Industrial rollers
• Processing machinery
• Agricultural machinery
• Power-transmission equipment
• Machinery with high radial-load requirements

🎯 Benefits

✔ Standard 75 × 130 × 25 mm mounting envelope

✔ Maximum-capacity construction

✔ Filling-slot design allows additional balls

✔ Higher radial-load capability than a conventional deep groove bearing of similar size

✔ Protected on both sides

✔ Helps retain grease

✔ Low-friction shielded-type configuration

✔ Suitable for radial-load-dominant applications

✔ Legacy MRC execution suitable for industrial replacement work

🧠 Technical Insight

• MRC 215MFF
• MRC 215M
• MRC 200-M Series
• Maximum Capacity Ball Bearing
• Filling Slot / Filling Notch
• 75 mm Bore
• 130 mm Outside Diameter
• 25 mm Width
• FF Double-Side Protected
• 6215 Dimensional Envelope
• Not the same internal design as standard 6215

✅ Key Features

• MRC (SKF) Bearing
• Model 215MFF
• 200-M Series
• Maximum-Capacity Construction
• Filling-Slot Ball Bearing
• 75 mm Bore
• 130 mm OD
• 25 mm Width
• Double-Side Protected Configuration

📊 Specifications

Brand: MRC (SKF)

Model / Bearing Number: 215MFF

Base Bearing: MRC 215M

Series: MRC 200-M Series

Dimensional Reference: 6215 envelope

Product Type: Maximum Capacity Radial Ball Bearing

Bearing Type: Single-Row Ball Bearing with Filling Slots

Bore Diameter (d): 75.00 mm

Outside Diameter (D): 130.00 mm

Width (B): 25.00 mm

Rolling Elements: Ball

Number of Rows: 1

Construction: Maximum Capacity / Filling Slot

Closure: Protected on both sides

FF Suffix: Typically associated with double-side shielding / protection in this MRC family; verify actual closure if critical

Primary Load: Radial

Axial Load Capability: More restricted than a conventional non-filling-slot deep groove bearing

Lubrication: Normally grease-retaining protected-bearing configuration

Internal Clearance: Not defined by the basic 215MFF designation

Cage: Verify original MRC production specification

Dynamic Load Rating: Verify original MRC data for the exact 215MFF execution

Static Load Rating: Verify original MRC data for the exact 215MFF execution

Speed Rating: Depends on filling-slot geometry, shield design, lubrication, internal clearance, fits, temperature, and load

Shaft Fit: Nominal 75 mm shaft

Housing Fit: Nominal 130 mm bearing seat

🔁 Equivalent

Suitable cross-reference search candidates include:

• MRC 215MFF
• MRC 215M
• Maximum Capacity 215 Bearing
• 75x130x25 Filling-Slot Ball Bearing
• NTN BL215 family
• NSK BL215 family
• Max-Type 75x130x25 Ball Bearing

Important: MRC 215MFF Is Not Automatically a Standard 6215

Both may share:

75 × 130 × 25 mm

but the internal construction is different.

MRC 215MFF

• Maximum-capacity design
• Filling slots
• Larger ball complement
• Higher radial-load capability
• More restricted axial-load capability
• Protected on both sides

Standard 6215

• Conventional Conrad-type deep groove design
• No filling slots
• Standard ball complement
• Better-balanced radial + moderate axial capability

Therefore:

MRC 215MFF ≠ Standard 6215

even though the external dimensions match.

Why the Filling Slot Matters

The filling-slot design allows more balls to be installed inside the bearing.

This gives:

✔ More rolling elements
✔ Greater radial capacity
✔ Better suitability for heavy radial load

However, the raceway shoulders are interrupted by the filling slots.

As a result:

• Axial-load capability is reduced
• Pure thrust loading should be avoided
• A standard 6215 should not be substituted solely because the dimensions match

215MFF vs 215S / Standard 6215

MRC 215MFF

• Maximum-capacity / filling-slot construction
• Higher radial capacity
• FF protected execution

MRC 215S / Standard 6215-type

• Conventional non-filling-slot construction
• Lower ball complement
• Better balance between radial and moderate axial loading

Therefore, internal construction must be matched in addition to dimensions.

Important Cross-Reference Consideration

Before replacing MRC 215MFF, verify:

• Bore = 75 mm
• OD = 130 mm
• Width = 25 mm
• Maximum-capacity / filling-slot construction
• Exact FF closure configuration
• Internal clearance
• Cage
• Grease specification
• Precision class
• Operating speed
• Radial load
• Axial load
• Shaft fit
• Housing fit

(Always verify the original MRC 215MFF bearing before selecting MRC 215M, NTN BL215, NSK BL215, standard 6215, or another replacement.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for electric motors, gearboxes, pumps, fans, conveyors, rollers, processing machinery, and power-transmission equipment requiring a 75x130x25 mm maximum-capacity filling-slot ball bearing.

📲 Contact via LINE ID: dusitrea

📧 Email: sales@seal4go.com

💬 Technical support available before ordering

🔍 Assistance available for cross-reference and equivalent part identification