EZO MR148ZZ 8x14x4 mm - Miniature Deep Groove Ball Bearing

EZO MR148ZZ 8x14x4 mm - Miniature Deep Groove Ball Bearing

EZO MR148ZZ is a miniature single-row deep groove ball bearing with dimensions 8x14x4 mm, manufactured by Kitanihon Seiki under the EZO brand. The bearing has an 8 mm bore diameter, 14 mm outside diameter and 4 mm width. The ZZ version features metal shields on both sides. The basic dynamic load rating Cr is 818 N, while the basic static load rating C0 is 386 N.

Technical data - EZO MR148ZZ

What does EZO MR148ZZ mean?

The designation MR148ZZ identifies a specific EZO miniature deep groove ball bearing.

MR148 identifies the bearing series and size.

ZZ indicates metal shields on both sides of the bearing.

The complete product identification is:

EZO MR148ZZ - 8x14x4 mm - miniature deep groove ball bearing with metal shields on both sides.

EZO MR148ZZ dimensions

The manufacturer's catalogue specifies:

• d - bore diameter: 8 mm

• D - outside diameter: 14 mm

• B - inner ring width: 4 mm

• C - outer ring width: 4 mm

Complete dimensions:

8x14x4 mm

The corresponding inch dimensions are approximately:

0.315x0.5512x0.1575 in

Load ratings of EZO MR148ZZ

According to the manufacturer's technical data:

Cr - basic dynamic load rating: 818 N

C0 - basic static load rating: 386 N

These values apply specifically to the MR148ZZ version and should not be replaced with ratings taken from other miniature bearings with the same 8x14x4 mm dimensions.

Limiting speed

The manufacturer specifies the following limiting speeds for MR148ZZ:

• grease lubrication: 42,000 min-1

• oil lubrication: 50,000 min-1

The lubrication method therefore affects the specified limiting speed of the bearing.

EZO MR148ZZ construction

MR148ZZ is a miniature single-row deep groove ball bearing.

Its construction includes:

• inner ring

• outer ring

• 10 balls

• cage

• metal shields on both sides

The manufacturer specifies a ball diameter of 1.588 mm.

The deep groove raceway geometry is designed primarily for radial loads while also allowing the bearing to accommodate axial loads in both directions within the operating limits of this bearing type.

What does ZZ mean?

The suffix ZZ indicates metal shields fitted on both sides of the bearing.

The shields help to:

• reduce the ingress of contaminants

• retain lubricant inside the bearing

• provide protection with low additional friction

A metal shield is not the same as a contacting elastomer seal. This distinction should be considered when selecting a bearing for a particular operating environment.

EZO MR148ZZ vs MR148

The EZO range includes different MR148 configurations.

MR148

Dimensions: 8x14x3.5 mm

MR148ZZ

Dimensions: 8x14x4 mm

This difference is important when selecting a replacement.

The open MR148 version has a width of 3.5 mm, while the shielded MR148ZZ version has a width of 4 mm.

Therefore, the difference between these variants is not limited only to the presence of metal shields.

EZO MR148ZZ vs MR148 2RS

EZO also offers a sealed version:

MR148 2RS - 8x14x4 mm

Both versions have the same basic dimensions, but their sealing arrangements are different.

MR148ZZ uses metal shields.

MR148 2RS uses seals.

The different protection systems also affect the specified speed capability. For MR148ZZ, the manufacturer specifies a grease-lubricated limiting speed of 42,000 min-1, while the corresponding MR148 2RS version has a lower specified limiting speed.

The ZZ and 2RS versions should therefore not automatically be treated as technically identical.

EZO MR148ZZ vs SMR148ZZ

The EZO catalogue also includes:

SMR148ZZ - 8x14x4 mm

MR148ZZ and SMR148ZZ have the same basic dimensions but are separate EZO catalogue references.

They should not be treated as identical products or identified interchangeably by omitting the letter S.

When replacing a bearing, always verify the complete designation.

Alternative designations and search references

The product may also be searched as:

• EZO MR148ZZ

• MR148ZZ EZO

• EZO MR 148 ZZ

• MR 148 ZZ EZO

• MR148 ZZ

• MR 148 ZZ

• MR148ZZ 8x14x4

• EZO MR148ZZ 8x14x4

• MR148ZZ bearing

• 8x14x4 bearing

• EZO 8x14x4 bearing

• miniature bearing 8x14x4

• miniature deep groove ball bearing 8x14x4

For precise product identification, the original manufacturer designation should be retained:

MR148ZZ

Selecting EZO MR148ZZ

Before ordering, verify:

• complete designation MR148ZZ

• 8 mm bore diameter

• 14 mm outside diameter

• 4 mm width

• ZZ shield configuration

• required load capacity

• operating speed

• lubrication requirements

• operating environment

• requirements of the specific application

Particular attention should be paid to bearing width because the open MR148 and shielded MR148ZZ versions do not have the same width.

Installation

The bearing, shaft and housing should be clean before installation.

When press-fitting the bearing onto a shaft, installation force should be applied to the inner ring. When fitting the bearing into a housing, force should be applied to the outer ring.

Installation force should never be transmitted through the balls.

Because MR148ZZ is a miniature bearing, particular care should also be taken not to deform or damage the metal shields during handling and installation.

FAQ

What are the dimensions of EZO MR148ZZ?

EZO MR148ZZ has dimensions of 8x14x4 mm: 8 mm bore diameter, 14 mm outside diameter and 4 mm width.

What type of bearing is EZO MR148ZZ?

It is a miniature single-row deep groove ball bearing.

What does ZZ mean in MR148ZZ?

ZZ indicates metal shields on both sides of the bearing.

What is the dynamic load rating of EZO MR148ZZ?

The basic dynamic load rating Cr is 818 N.

What is the static load rating of EZO MR148ZZ?

The basic static load rating C0 is 386 N.

What is the limiting speed of EZO MR148ZZ?

The manufacturer specifies a limiting speed of 42,000 min-1 with grease lubrication and 50,000 min-1 with oil lubrication.

Are MR148 and MR148ZZ the same width?

No. The open MR148 has a width of 3.5 mm, while MR148ZZ has a width of 4 mm.

Are MR148ZZ and SMR148ZZ the same bearing?

No. They are separate EZO catalogue references. Although their basic dimensions are the same, the complete manufacturer designation should always be verified before replacement.

EZO MR148ZZ - key information

EZO MR148ZZ is a miniature deep groove ball bearing with dimensions 8x14x4 mm and metal shields on both sides. The manufacturer specifies a basic dynamic load rating of 818 N, a basic static load rating of 386 N, and limiting speeds of 42,000 min-1 with grease lubrication and 50,000 min-1 with oil lubrication.

Available from simmering.pl, a specialist supplier of bearings, seals and industrial components. Stock in Poland with worldwide shipping.