The MRC 220M is a heavy-duty maximum-capacity radial ball bearing designed for machinery where high radial load capacity is required.

Its dimensions are:

100 × 180 × 34 mm

which are dimensionally similar to the modern 6220 bearing family.

However, the MRC 220M uses:

Maximum Capacity / Filling-Slot Construction

rather than the conventional Conrad-type construction of a standard 6220.

Filling slots permit additional balls to be installed between the inner and outer raceways. The increased ball complement provides greater radial load capacity.

The trade-off is that the filling slots interrupt the raceway shoulders, reducing the bearing's suitability for significant axial or thrust loading.

⚙️ Applications

• Heavy-duty electric motors
• Industrial gearboxes
• Large pumps
• Fans and blowers
• Conveyor drives
• Industrial rollers
• Material-handling equipment
• Processing machinery
• Agricultural machinery
• Power-transmission equipment
• Machinery with high radial-load requirements

🎯 Benefits

✔ Maximum-capacity design for high radial loads

✔ Increased ball complement

✔ Filling-slot construction

✔ Heavy-duty 100 × 180 × 34 mm mounting envelope

✔ Open construction suitable for machine-supplied lubrication

✔ Approx. 127 kN dynamic load rating

✔ Approx. 134 kN static load rating

✔ Suitable for demanding industrial rotating equipment

✔ Legacy MRC bearing with identifiable modern cross-reference families

🧠 Technical Insight

• MRC 220M
• MRC SKF 220M
• MRC 200-M Series
• Maximum Capacity Ball Bearing
• Filling Slot / Filling Notch
• Open Type
• Bore 100 mm
• OD 180 mm
• Width 34 mm
• Dynamic Load Rating approx. 28,600 lbf / 127 kN
• Static Load Rating approx. 30,100 lbf / 134 kN
• Grease Limiting Speed approx. 2,800 rpm
• Oil Limiting Speed approx. 3,400 rpm
• Minimum Fillet Radius approx. 2 mm
• Approx. Weight 3.45 kg
• ABEC 1 / Normal Precision class reference
• Same dimensional envelope as 6220, but different internal construction

✅ Key Features

• MRC (SKF) Bearing
• Model 220M
• MRC 200-M Series
• Maximum-Capacity Construction
• Single-Row Radial Ball Bearing
• Filling-Slot Design
• Open Type
• 100 mm Bore
• 180 mm OD
• 34 mm Width
• High Radial-Load Capacity

📊 Specifications

Brand: MRC (SKF)

Model / Bearing Number: 220M

Series: MRC 200-M Series

Product Type: Maximum Capacity Deep Groove Ball Bearing

Bearing Type: Single-Row Radial Ball Bearing with Filling Slots

Construction: Maximum Capacity / Filling Slot

Closure: Open Type

Bore Diameter (d): 100.00 mm

Outside Diameter (D): 180.00 mm

Width (B): 34.00 mm

Rolling Elements: Ball

Number of Rows: 1

Dynamic Load Rating: Approx. 28,600 lbf / 127 kN

Static Load Rating: Approx. 30,100 lbf / 134 kN

Grease Limiting Speed: Approx. 2,800 rpm

Oil Limiting Speed: Approx. 3,400 rpm

Minimum Fillet Radius: Approx. 2 mm

Weight: Approx. 3.45 kg

Precision Class: ABEC 1 / Normal Precision reference

Primary Load: High radial load

Axial Load Capability: Restricted compared with conventional non-filling-slot deep groove bearings

Lubrication: External grease or oil lubrication according to machine design

Internal Clearance: Verify exact original MRC execution if clearance is critical

Cage: Verify original MRC production specification

Shaft Fit: Nominal 100 mm shaft

Housing Fit: Nominal 180 mm bearing seat

🔁 Equivalent

Suitable replacement or cross-reference search candidates include:

• MRC 220M
• NTN BL220
• NSK BL220
• Maximum Capacity 220 Ball Bearing
• 100x180x34 Filling-Slot Ball Bearing
• Max-Type 100x180x34 Radial Ball Bearing
• 6220 dimensional family — dimensional reference only

MRC 220M vs Standard 6220

Both bearings use the same principal dimensions:

100 × 180 × 34 mm

but their internal geometry differs significantly.

MRC 220M

• Maximum-capacity design
• Filling slots
• Increased number of balls
• Higher radial-load capability
• More restricted axial-load capability
• Open type

Standard 6220

• Conventional Conrad-type deep groove construction
• No filling slots
• Standard ball complement
• More balanced radial and moderate axial-load capability

Therefore:

MRC 220M ≠ Standard 6220

and a 6220 should not be selected solely because the dimensions match.

Why the Filling Slot Matters

The filling slots allow additional balls to be assembled into the bearing.

This provides:

✔ More rolling elements sharing the radial load
✔ Increased radial-load capacity
✔ Better suitability for heavily loaded machinery

However, because the filling notches interrupt the raceway shoulders:

• Axial-load capability is reduced
• Continuous heavy thrust loading should be avoided
• Pure thrust applications are unsuitable
• Replacement bearings should preferably retain maximum-capacity construction when the machine was designed around this characteristic

MRC 220M vs NTN / NSK BL220

The NTN BL220 and NSK BL220 families are relevant modern maximum-capacity / filling-slot cross-reference candidates.

They are more technically relevant starting points than a conventional 6220 because they retain the maximum-capacity filling-slot concept.

Exact interchangeability still requires verification of:

• Dimensions
• Internal clearance
• Cage
• Load ratings
• Speed ratings
• Raceway geometry
• Shoulder and fillet geometry
• Lubrication
• Precision
• Application loads

Speed Rating Consideration

For this bearing, commonly referenced limiting-speed values are approximately:

Grease lubrication: 2,800 rpm

Oil lubrication: 3,400 rpm

These should be treated as reference limits for the specified bearing execution.

Actual permissible operating speed may be lower depending on:

• Radial load
• Any axial load
• Shaft and housing fit
• Lubricant
• Operating temperature
• Alignment
• Contamination
• Bearing condition

Important Cross-Reference Consideration

Before replacing MRC 220M, verify:

• Bore = 100 mm
• OD = 180 mm
• Width = 34 mm
• Maximum-capacity / filling-slot construction
• Open configuration
• Internal clearance
• Cage
• Load ratings
• Lubrication
• Precision class
• Operating speed
• Shaft fit
• Housing fit
• Shoulder diameter
• Fillet radius

(Always verify the original MRC 220M specification before selecting NTN BL220, NSK BL220, standard 6220, or another replacement. Dimensions alone do not guarantee interchangeability.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for heavy-duty electric motors, gearboxes, pumps, conveyor drives, industrial rollers, processing machinery, power-transmission equipment, and applications requiring a 100x180x34 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