The MRC 218SFF is designed mainly for radial loading while also supporting moderate axial loads in both directions.

Its dimensions are:

90 × 160 × 30 mm

which correspond dimensionally to:

6218

Unlike MRC maximum-capacity M-series bearings, the 218SFF uses a conventional non-filling-slot / Conrad-type internal design. This gives a more balanced combination of radial and axial load capability.

The double-side protected FF execution helps retain grease and reduce contamination while maintaining relatively low friction.

⚙️ Applications

• Large electric motors
• Industrial pumps
• Fans and blowers
• Gearboxes
• Conveyor systems
• Industrial rollers
• Processing machinery
• Agricultural machinery
• Power-transmission systems
• General heavy industrial rotating equipment

🎯 Benefits

✔ Standard 90 × 160 × 30 mm dimensions

✔ Single-row deep groove construction

✔ Non-filling-slot / Conrad-type design

✔ Good radial-load capability

✔ Supports moderate axial load in both directions

✔ Double-side protected configuration

✔ Good grease retention

✔ Relatively low friction

✔ Suitable for medium-to-heavy industrial rotating machinery

🧠 Technical Insight

• MRC 218SFF
• MRC 218S
• MRC 200-S Series
• Deep Groove Ball Bearing
• 90 mm Bore
• 160 mm Outside Diameter
• 30 mm Width
• Non-Filling-Slot / Conrad Type
• FF Double-Side Protected
• Modern Dimensional Reference: 6218
• Dynamic Load Rating approx. 101 kN
• Static Load Rating approx. 73.5 kN
• Limiting Speed approx. 4,300 rpm
• Reference speed can be higher under suitable conditions and is not the same as limiting speed
• Approx. weight 2.36 kg

✅ Key Features

• MRC (SKF) Bearing
• Model 218SFF
• 200-S Series
• Single-Row Deep Groove Ball Bearing
• 90 mm Bore
• 160 mm OD
• 30 mm Width
• Double-Shielded Configuration
• Approx. Dynamic Rating: 101 kN
• Approx. Static Rating: 73.5 kN

📊 Specifications

Brand: MRC (SKF)

Model / Bearing Number: 218SFF

Base Bearing: MRC 218S

Series: MRC 200-S Series

Modern Dimensional Reference: 6218

Product Type: Deep Groove Ball Bearing

Bearing Type: Single-Row Radial Ball Bearing

Construction: Non-Filling-Slot / Conrad-Type

Bore Diameter (d): 90.00 mm

Outside Diameter (D): 160.00 mm

Width (B): 30.00 mm

Rolling Elements: Ball

Number of Rows: 1

Closure: Double-side protected / shielded

FF Suffix: Double-side protected execution in this MRC family

Primary Load: Radial

Axial Load Capability: Moderate axial load in both directions depending on speed, fit, lubrication, and operating load

Dynamic Load Rating: Approx. 101 kN

Static Load Rating: Approx. 73.5 kN

Limiting Speed: Approx. 4,300 rpm

Reference Speed: Can be higher than limiting speed under suitable conditions; do not treat the two values as interchangeable

Weight: Approx. 2.36 kg

Lubrication: Grease-retaining protected-bearing configuration

Internal Clearance: Not defined by the basic 218SFF designation; verify if C3 or another clearance is required

Cage: Verify original MRC production specification

Shaft Fit: Nominal 90 mm shaft

Housing Fit: Nominal 160 mm bearing seat

🔁 Equivalent

Suitable dimensional replacement or cross-reference candidates include:

• MRC 218SFF
• MRC 218S
• SKF 6218-2Z
• FAG 6218-2Z
• NSK 6218ZZ
• NTN 6218ZZ
• KOYO 6218ZZ
• NACHI 6218ZZ
• 90x160x30 Double-Shielded Deep Groove Ball Bearing

MRC 218SFF → Modern 6218 Family

The dimensional relationship is:

MRC 218SFF = 90 × 160 × 30 mm

which corresponds to:

6218

If the original FF execution is confirmed as double metal shielded, the closest modern constructional family is:

6218-2Z / 6218ZZ

depending on manufacturer terminology.

218SFF vs 218M

These should not be confused.

MRC 218SFF

• Standard S-series construction
• Non-filling-slot / Conrad type
• Double-side protected
• Better-balanced radial + moderate axial capability

MRC 218M

• Maximum-capacity construction
• Filling slots
• Larger ball complement
• Higher radial-load capability
• More restricted axial-load capability

Therefore:

218SFF ≠ 218M

even if the external dimensions are the same.

6218-2Z vs 6218-2RS

Both generally use:

90 × 160 × 30 mm

but the closure differs.

6218-2Z / ZZ

• Metal shields on both sides
• Lower friction
• Good grease retention
• Generally better for higher speed
• Helps exclude larger dust and debris

6218-2RS / 2RSH

• Rubber seals on both sides
• Better fine-dust and moisture protection
• Higher friction
• Usually lower permissible speed

Therefore, 6218-2RS should not automatically replace MRC 218SFF solely because the dimensions match.

Important Cross-Reference Consideration

Before replacing MRC 218SFF, verify:

• Bore = 90 mm
• OD = 160 mm
• Width = 30 mm
• Exact shield / seal configuration
• Internal clearance
• Cage
• Grease specification
• Precision class
• Operating speed
• Radial load
• Axial load
• Shaft fit
• Housing fit

(Always verify the full marking and actual closure of the original MRC 218SFF before selecting SKF 6218-2Z, FAG 6218-2Z, NTN 6218ZZ, NSK 6218ZZ, or another replacement.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for large electric motors, pumps, fans, gearboxes, conveyors, rollers, processing machinery, and heavy industrial equipment requiring a 90x160x30 mm double-shielded deep groove 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