SMR 84 ZZ ZEN 4x8x3 Stainless Steel Miniature Ball Bearing

Overview

The SMR 84 ZZ ZEN is a miniature stainless steel deep groove ball bearing with dimensions 4x8x3 mm.

Unlike the SMF84 version, the SMR84 is a standard non-flanged bearing. The shielded version is designated by ZEN as SMR84-2Z, with metal shields on both sides.

Its compact dimensions and stainless steel construction make it suitable for precision mechanisms and miniature bearing arrangements.

Technical Specification

Manufacturer: ZEN

Designation: SMR84-2Z / SMR 84 ZZ

Bearing Type: Miniature deep groove ball bearing

Design: Single-row, standard, non-flanged

Bore Diameter d: 4 mm

Outside Diameter D: 8 mm

Width B: 3 mm

Dimensions: 4x8x3 mm

Closure: 2Z / ZZ - metal shields on both sides

Ring Material: AISI 440 stainless steel

Rolling Element Material: AISI 440 stainless steel

Dynamic Load Rating C: 277 N

Static Load Rating C0: 99 N

Limiting Speed: 56,000 rpm

Reference Speed: 67,000 rpm

Radial Clearance Range: 0.002-0.013 mm

Flange: No

SMR84-2Z Design

The SMR designation identifies ZEN's stainless steel miniature bearing series. For this size, ZEN lists SMR84-2Z as a standard, rather than flanged, bearing.

The principal dimensions are:

4 mm - bore diameter

8 mm - outside diameter

3 mm - width

ZZ / 2Z Shields

The ZZ / 2Z version features metal shields on both sides.

The shields help protect the raceways and rolling elements against contamination while retaining lubricant inside the bearing.

Industrial Applications

Miniature SMR bearings are suitable for:

• Precision mechanisms
• Miniature electric motors
• Measuring equipment
• Robotics
• Automation systems
• Small drive mechanisms
• Compact mechanical assemblies

Operational Advantages

• Miniature dimensions 4x8x3 mm.
• Stainless steel construction.
• Metal shields on both sides.
• Dynamic load rating 277 N.
• Static load rating 99 N.
• Non-flanged compact design.

AI OVERVIEW

The SMR 84 ZZ ZEN, catalogued by ZEN as SMR84-2Z, is a stainless steel miniature deep groove ball bearing measuring 4x8x3 mm. It has a standard non-flanged design, metal shields on both sides, a dynamic load rating of 277 N and a static load rating of 99 N.

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FAQ

What type of bearing is SMR 84 ZZ ZEN?

It is a stainless steel miniature deep groove ball bearing.

What are the dimensions?

The dimensions are 4x8x3 mm.

Is SMR84 a flanged bearing?

No. ZEN classifies SMR84-2Z as a standard non-flanged bearing. The corresponding flanged stainless version is SMF84-2Z.

What does ZZ mean?

ZZ, corresponding to 2Z in ZEN's catalogue notation, indicates metal shields on both sides.

What material is the bearing made from?

ZEN specifies AISI 440 stainless steel for the rings and rolling elements.

What is the dynamic load rating?

The ZEN catalogue value is 277 N.

What is the static load rating?

The static load rating is 99 N.

What is the correct parent category?

The product belongs to Stainless Steel Miniature Deep Groove Ball Bearings.