COL MR364DB Open Miniature Angular Contact Bearing Pair

Miniature dimensions for compact precision assemblies

The COL MR364DB combines a miniature angular contact bearing format with a paired configuration. With a 3 mm bore and 6 mm outside diameter, it offers a compact bearing envelope for small rotary and pivot mechanisms. The 4 mm dimension is the total width of the pair, not the width of an individual bearing.

The supplied fingertip photograph shows the actual uncovered bearing appearance and miniature scale. This model uses an open construction without shields or seal covers. Lubrication, cleanliness and protection from contamination should be considered as part of the assembly design.

Technical specifications

Dimensions, chamfer values, load ratings and limiting speeds are transcribed from the supplied MR364DB catalog row. The 4 mm overall paired width and uncovered construction are confirmed by the product supplier. Confirm the load-rating basis for the supplied pair against the approved drawing before engineering calculations; do not independently double the catalog ratings. Catalog limiting speeds do not guarantee the operating speed of a specific assembly.

Key features

• Miniature 3 mm bore and 6 mm outside diameter for compact mechanical layouts.
• Paired format with a total width of 4 mm.
• Open construction without shields or seal covers.
• Catalog load and speed data for initial bearing selection.

Application evaluation

MR364DB may be evaluated for compact precision rotary assemblies, miniature pivot supports and robotic dexterous hand joints. Final suitability depends on radial and axial loads, load direction, oscillation or rotation, duty cycle, fits, lubrication and required running accuracy.

Confirm your specification

Contact angle, precision grade, preload, materials, cage specification, friction torque and service life are not defined in the supplied model row. Confirm these items and the paired mounting arrangement against the approved MR364DB drawing before ordering. Keep the open bearing clean during storage and installation, and use application-appropriate lubrication.

Frequently asked questions

Does MR364DB have covers?

No. This product has an open construction without shields or seal covers.

Is 4 mm the width of one bearing?

No. It is the overall width of the bearing pair: 3 mm bore × 6 mm outside diameter × 4 mm overall paired width.

What brand should be specified?

COL is the trademark for this angular contact bearing product. The manufacturer is Beining Intelligent Technology (Zhejiang) Co., Ltd.

What information is needed for a quotation?

Provide the quantity, installation drawing, operating loads, speed or oscillation range, duty cycle, lubrication conditions, and any precision or preload requirements.

Request a quotation

Contact Beining Intelligent Technology (Zhejiang) Co., Ltd. for the COL MR364DB drawing, application review and quotation.

Email: shelley@bncolbearing.com

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