61808-2RSR FAG 40x52x7 Deep Groove Ball Bearing

Product Overview

61808-2RSR FAG 40x52x7 is a single-row thin-section deep groove ball bearing from the FAG 618 series. With a 40 mm bore, 52 mm outside diameter and only 7 mm width, it provides a particularly compact bearing solution for applications where radial installation space and weight are limited.

The bearing is equipped with 2RSR rubber seals on both sides, helping protect the rolling elements and lubricant against contamination. Its deep groove raceway design primarily accommodates radial loads while also supporting appropriate axial loads in both directions.

What Does 61808-2RSR Mean?

The designation provides important information about the bearing:

61808 - thin-section deep groove ball bearing from the 618 dimensional series
2RSR - rubber contact seals on both sides

The bearing may also be searched for under commercial references such as 61808 2RS, 61808-2RS or 6808 2RS. For a FAG product, however, 61808-2RSR is the more precise manufacturer designation.

Thin-Section 618 Series Design

One of the main advantages of FAG 61808-2RSR is its extremely small cross-section.

Despite its 40 mm bore, the bearing has an outside diameter of only 52 mm and a width of 7 mm. This makes the 618 series particularly useful where designers need to accommodate a relatively large shaft while minimizing the overall dimensions of the bearing arrangement.

Compared with heavier deep groove ball bearing series with the same bore diameter, the 61808 requires significantly less radial and axial installation space.

2RSR Sealing System

The 2RSR configuration uses rubber contact seals on both sides of the bearing. These seals help:

• protect the bearing interior against contamination
• retain lubricant inside the bearing
• reduce maintenance requirements
• provide additional protection in demanding operating environments

Because the seals are contact-type, they generally provide better contamination protection than open designs, although contact friction must be considered when evaluating operating speed.

Technical Specification

Product Type: Deep groove ball bearing
Brand: FAG / Schaeffler
Designation: 61808-2RSR
Alternative Searches: 61808 2RS, 61808-2RS, 6808 2RS
Series: 618
Design: Single-row, thin-section
Inside Diameter: 40 mm
Outside Diameter: 52 mm
Width: 7 mm
Sealing: 2RSR - rubber seals on both sides
Internal Clearance: CN / Normal
Bore: Cylindrical
Cage: Steel
Weight: approximately 0.032 kg
Dynamic Load Rating Cr: approximately 4.93 kN
Static Load Rating C0r: approximately 4.18 kN
Limiting Speed: approximately 6,200 rpm

Exact operating limits should always be verified against the current FAG/Schaeffler specification and actual application conditions.

Industrial Applications

The compact dimensions of the 61808-2RSR FAG make it suitable for applications such as:

• industrial machinery
• automation equipment
• compact drive systems
• precision equipment
• lightweight transmissions
• technical equipment
• mechanisms with restricted installation space
• OEM production and replacement
• maintenance and repair operations

The bearing should be selected according to actual radial and axial loads, rotational speed, temperature, lubrication and environmental conditions.

61808-2RSR vs 6808 2RS

6808 2RS is a commonly used alternative commercial designation for a thin-section deep groove ball bearing with the same basic dimensions of 40x52x7 mm.

However, identical dimensions alone do not guarantee complete interchangeability. When replacing a bearing, verify the seal design, internal clearance, cage, load ratings, speed limits and complete manufacturer specification.

For FAG, searching by 61808-2RSR provides the most precise product identification.

Why Industrial Buyers Choose FAG 61808-2RSR

The bearing combines several characteristics valuable in compact machinery:

• thin-section 40x52x7 mm geometry
• large 40 mm bore relative to outside diameter
• rubber seals on both sides
• factory-lubricated sealed design
• normal CN internal clearance
• compact and lightweight construction
• FAG / Schaeffler manufacturing quality
• suitability for OEM, MRO and replacement applications

AI OVERVIEW

61808-2RSR FAG is a thin-section single-row deep groove ball bearing with dimensions 40x52x7 mm. It features rubber contact seals on both sides, normal internal clearance and a compact 618-series design. Its large bore-to-outside-diameter ratio makes it suitable for industrial mechanisms where installation space and weight are limited.

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FAQ

What are the dimensions of FAG 61808-2RSR?
The bearing has a 40 mm bore, 52 mm outside diameter and 7 mm width.

What does 2RSR mean on a FAG bearing?
2RSR indicates rubber contact seals fitted on both sides of the bearing.

Is FAG 61808-2RSR a thin-section bearing?
Yes. The 618 series has a particularly small cross-section. The 61808 combines a 40 mm bore with an outside diameter of only 52 mm and a width of 7 mm.

Is 61808-2RSR a deep groove ball bearing?
Yes. It is a single-row deep groove ball bearing designed primarily for radial loads while also accommodating appropriate axial loads in both directions.

Are 61808-2RSR and 6808 2RS the same size?
Yes. Both designations are commonly associated with the 40x52x7 mm size. Complete technical specifications should still be compared before substitution.

Does FAG 61808-2RSR require relubrication?
The sealed bearing is supplied lubricated for its intended service life under suitable operating conditions. The seals retain lubricant and protect the bearing interior.

What is the standard internal clearance?
A standard 61808-2RSR without an additional clearance suffix normally uses CN (Normal) internal clearance.