Miniature Deep Groove Ball Bearing

MR115-2RS Miniature Ball Bearing | 5×11×4 mm | 2RS Sealed | In Stock

5 mm Bore × 11 mm OD × 4 mm Width · Miniature Deep Groove Ball Bearing · 2RS Double Rubber Seal · Multiple Material Options · In Stock

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Send us your part number, dimensions, photo, or sample — we'll help confirm the correct replacement before you order.

When You Need This Bearing, You're Usually Confirming a Very Specific Fit

The MR115-2RS is a miniature deep groove ball bearing with a 5 mm bore, 11 mm outside diameter, and 4 mm width.

This compact 5×11×4 mm size is used in a wide range of small rotating assemblies. When replacing a miniature bearing, however, matching the dimensions alone is not always enough.

The seal type, material, clearance, lubrication, speed, and application conditions also need to match the requirements of the equipment.

If you're replacing an existing MR115-2RS or another 5×11×4 mm miniature bearing, we recommend confirming the complete specification before ordering.

Technical Specifications

The 5 × 11 × 4 mm (0.197" × 0.433" × 0.157") dimensions are widely used for MR115-2RS miniature bearings.

What This Bearing Is

The MR115-2RS is a miniature single-row deep groove ball bearing designed for compact rotating applications.

Its basic dimensions are:
5 mm bore × 11 mm outside diameter × 4 mm width

The 2RS designation indicates double rubber seals on both sides. The sealed configuration helps retain lubricant and reduce the entry of dust and other external contaminants.

The MR115-2RS is available in different material configurations depending on the application, including chrome steel, stainless steel, and hybrid ceramic options.

The correct material and configuration should be selected according to the actual operating environment rather than the model number alone.

Key Features

• Compact 5×11×4 mm Size
  The small envelope is suitable for equipment where installation space is limited.

• Double Rubber Seals
  The 2RS sealing arrangement helps protect the internal bearing area from external contamination while retaining lubricant.

• Multiple Material Options
  Chrome steel can be used for general applications, while stainless steel can be considered when corrosion resistance is important. Hybrid ceramic configurations are available for selected applications where different material characteristics are required.

• Miniature Deep Groove Design
  The deep groove design is suitable for compact rotating assemblies where radial bearing support is required within the application's operating limits.

Where This Bearing Is Used

The MR115-2RS can be considered for applications such as:

• Fishing reels

• RC cars and hobby equipment

• Micro motors

• Compact gearboxes

• Small instruments and mechanisms

• Miniature automation equipment

• Electronic and rotating assemblies

The exact suitability depends on load, speed, temperature, shaft and housing fit, lubrication, and environmental conditions.

For applications exposed to moisture or saltwater, consider the stainless steel configuration rather than assuming a standard chrome steel bearing will provide the required corrosion resistance.

MR115-2RS for Fishing Reels

The 5×11×4 mm size is widely encountered in compact fishing reel and small rotating equipment applications.

Typical installation locations may include:

• Spool assemblies

• Handle components

• Gear support points

• Line-related mechanisms

• Other compact rotating assemblies

For fishing reel applications, the appropriate material, sealing arrangement, lubrication, and clearance should be selected according to the environment and required rotational characteristics.

Need to Match an Existing MR115-2RS Bearing?

For miniature bearings, a small dimensional difference can affect installation and operation.

A 5 mm bore alone does not confirm compatibility.

Before ordering, check:
Bore → Outer Diameter → Width → Seal → Material → Clearance → Lubrication → Application

Also confirm whether your original bearing is:
Chrome Steel · Stainless Steel · Hybrid Ceramic
and:
2RS Sealed · ZZ Shielded · Open

Send us any of the following:

• Existing bearing number

• Bore, OD, and width

• Bearing photo

• Drawing

• Physical sample

• Equipment model

We'll check the dimensions and configuration before shipment.

Don't have all the information? Send us whatever you have.
A photo, partial dimensions, or the original bearing number may be enough for us to start the identification.

For additional identification support, see our Bearing Identification Service.

MR115-2RS Cross-Reference

The MR115-2RS designation is used for the 5×11×4 mm miniature sealed bearing size, while different manufacturers may use their own designation systems for the same basic dimensional configuration.

For example, published miniature-bearing references show MR115-2RS as a 5×11×4 mm sealed bearing, while other manufacturers may use different part-number systems.

Because material, clearance, lubrication, seal construction, and precision can differ between manufacturers, do not assume that matching the part number or dimensions alone guarantees interchangeability.

Have a specific original brand or part number?
Send it to us and we'll check the corresponding specification before recommending a replacement.

MR115-2RS Material Options

Chrome Steel MR115-2RS
Suitable for: General industrial applications, RC equipment, micro motors, compact machinery.
Chrome steel is commonly used for miniature bearing applications where corrosion resistance is not the primary requirement.

Stainless Steel MR115-2RS
Suitable for: Fishing reels, outdoor equipment, humid environments, corrosion-sensitive applications.
Stainless steel can provide improved corrosion resistance compared with conventional bearing chrome steel.
For other stainless steel miniature bearing options, see our Stainless Steel Bearings.

Hybrid Ceramic MR115-2RS
Suitable for selected: High-speed miniature applications, fishing reel applications, RC equipment, compact motor systems.
The appropriate configuration depends on the actual speed, load, lubrication, and operating environment.

MR115-2RS vs. MR62ZZ

Both are miniature deep groove ball bearings, but they have different dimensions and sealing arrangements.

These are different bearing sizes and are not interchangeable simply because both are miniature bearings.

Looking for a smaller miniature bearing? See our MR62ZZ Miniature Shielded Ball Bearing.

For a stainless steel 3×6×2.5 mm option, see our SMR63ZZ Stainless Steel Miniature Ball Bearing.

Why Buy From EKB?

For miniature bearings, finding a 5×11×4 mm bearing is only part of the job.
The more important question is whether the material, sealing, clearance, lubrication, and overall configuration match your application.

EKB helps customers check:
Dimensions → Configuration → Material → Application → Availability

We support difficult-to-source miniature and replacement bearing requirements and help customers confirm the correct specification before shipment.

About EKB

EKB Bearing (Hebei Shuanghejincheng Bearing Co., Ltd.) operates an 18,000 m² factory with 13 automated production lines and 42 high-precision testing units, with products exported to 66 countries.

We support customers with miniature, stainless steel, special-dimension, inch-size, and replacement bearing requirements.

Frequently Asked Questions

What are the dimensions of MR115-2RS?
The MR115-2RS dimensions are: 5 mm bore × 11 mm outside diameter × 4 mm width.

What does 2RS mean on MR115-2RS?
2RS indicates rubber seals on both sides of the bearing. The seals help retain lubricant and reduce the entry of external contaminants.

Is MR115-2RS suitable for fishing reels?
The 5×11×4 mm MR115-2RS size is commonly used in compact rotating equipment, including fishing reel applications.
For fishing reels exposed to saltwater or high humidity, the appropriate material and lubrication should be selected according to the actual application.

Is MR115-2RS available in stainless steel?
Yes. EKB supplies stainless steel configurations of the MR115-2RS for applications where corrosion resistance is important.

Can MR115-2RS replace another 5×11×4 mm bearing?
It may be possible when the complete specification matches.
Check the seal type, material, clearance, lubrication, precision, and application requirements rather than relying on dimensions alone.

What is the difference between MR115-2RS and MR115ZZ?
Both use the 5×11×4 mm dimensional envelope, but 2RS uses rubber seals, while ZZ uses metal shields.
The two configurations have different sealing characteristics and should be selected according to the application.

Do you offer other miniature bearing sizes?
Yes. See our Stainless Steel Bearings for stainless steel options, or contact us with your required dimensions.

What if I only have the old bearing?
Send us the original bearing, a photo, the marking, or whatever dimensions you can measure.
You don't need to know the exact replacement model before contacting us.
See our Bearing Identification Service for additional support.

Need to Confirm MR115-2RS?

Send us: Part Number · Dimensions · Photo · Drawing · Sample
We'll confirm: Size · Seal Type · Material · Configuration · Availability
Before you place the order.

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