SMR63ZZ Stainless Steel Miniature Ball Bearing

3 x 6 x 2.5 mm | AISI 420 / 304 Stainless Steel | ZZ Shields

EKB supplies SMR63ZZ stainless steel miniature deep groove ball bearings in AISI 420 and AISI 304 material options. The bearing has a 3 mm bore, 6 mm outside diameter and 2.5 mm width, with metal shields on both sides.

SMR63ZZ is used in small rotating assemblies where installation space is limited. Stainless steel versions are often selected for equipment where corrosion resistance is an important consideration.

We supply miniature bearings to distributors, equipment manufacturers and industrial buyers. Customers can specify the required material and quantity when sending an inquiry.

SMR63ZZ Bearing Specifications

Material Options

AISI 420 Stainless Steel
AISI 420 is a martensitic stainless steel that can be heat-treated to increase hardness. It is used for components requiring suitable mechanical strength, wear resistance and a degree of corrosion resistance.

AISI 304 Stainless Steel
AISI 304 is an austenitic stainless steel with good corrosion resistance in many common environments. It may be considered where moisture exposure and corrosion resistance are important. The performance of the finished bearing depends on its internal construction and operating conditions.

Both material options can be supplied for SMR63ZZ. Please indicate whether AISI 420 or AISI 304 is required when requesting a quotation.

Bearing Construction and Applications

The SMR63ZZ has a compact deep groove ball bearing design with two metal shields. The ZZ shields help retain lubricant and reduce the entry of light dust and contaminants. They are not intended to provide a waterproof seal.

This bearing size may be used in miniature motors, small sensors, electronic equipment, RC models, compact drive systems and other small mechanical assemblies.

For applications involving water, chemicals, higher speeds or unusual loads, the bearing material and operating requirements should be checked before selection.

Bearing Cross-Reference

The 3 x 6 x 2.5 mm miniature bearing size is associated with several supplier designations, including SMR63ZZ, MR63ZZ and DDL-630ZZ.

These numbers are provided as cross-reference information only. Bearings with similar dimensions may have different materials, precision grades, internal clearances or lubrication.

When replacing an existing bearing, please check the full dimensions, material and shield type. You can also send us the original bearing number, photograph or drawing for identification.

Bearing Identification Service

Quality Inspection and Shipment

EKB works with its manufacturing and supply partners to coordinate bearing orders and specification requirements. Inspection documentation and special checking requirements can be discussed according to the order.

Bearing inspection equipment

Products are packed according to bearing type, order quantity and shipping requirements. Packaging and delivery arrangements are confirmed before shipment.

Bearing packing and shipment

Frequently Asked Questions

What is the size of SMR63ZZ?
The bearing measures 3 mm bore, 6 mm outside diameter and 2.5 mm width.

What materials are available?
EKB offers AISI 420 and AISI 304 stainless steel options. Please specify the required material when ordering.

What does ZZ mean?
ZZ indicates metal shields on both sides of the bearing. These shields help retain lubricant and reduce light contamination.

Can SMR63ZZ replace MR63ZZ?
The two designations may have the same boundary dimensions, but material and other specifications should be checked before replacement.

Can I order other miniature bearing sizes?
Yes. EKB supplies a range of miniature bearings in standard and special dimensions. Please send your model list or drawings for quotation.

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MR63ZZ Miniature Ball Bearing

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Request a Quote

For SMR63ZZ stainless steel miniature bearings, please send us your required material (AISI 420 or 304), quantity and delivery destination.

If you are looking for a replacement or special configuration, you can also provide a bearing number, photo or technical drawing.

Contact EKB for current availability, pricing and order details.

Contact EKB - Request a Quote