639 ZZ — 9 × 30 × 10 mm

What each manufacturer published.

A dash means that manufacturer did not publish the value. Dimensions every source agrees on are shown above rather than repeated per row.

Calculated from the published values.

Arithmetic on the figures above — not a bearing life calculation for your load case.

The works that publish 639 ZZ.

Hongchi

Ningbo, Zhejiang, China

Miniature metric, inch and thrust bearings

Ningbo Hongchi manufactures miniature bearings with a published bore range of 1–40 mm. Its product scope includes metric and inch miniature bearings, flanged bearings and flat thrust ball bearings. The company lists miniature motors, cooling fans, drones, instruments and medical equipment among its applications; exact material and closure options should be confirmed per model.

Published ranges: Metric and inch miniature bearings · Flanged miniature bearings · Flat thrust ball bearings

80 designations documented here · 1 reviewed evidence record · source recorded 2026-09-24

Ask Hongchi about 639zz

Add to inquiry

Mosheng

Ningbo, Zhejiang, China

Miniature and small deep groove ball bearings

Ningbo Mosheng manufactures miniature and small deep groove ball bearings. Its published catalogue organizes products for appliances, office automation, automotive systems and other applications, alongside bearing data sheets. The company also presents research, manufacturing and quality operations. Closure type, lubrication and noise requirements should be supplied with the model reference.

Published ranges: Miniature deep groove ball bearings · Small deep groove ball bearings · Application-specific ball-bearing ranges

27 designations documented here · 1 reviewed evidence record · source recorded 2026-09-24

Ask Mosheng about 639 ZZ

Add to inquiry

Applications the publishing works state.

Application areas each manufacturer states for its own range. Confirm load, speed, temperature and lubrication for your case.

Not documented by any source here.

Precision class · Internal clearance · Sealing · Material · Cage material · Z class · V class · Dynamic load rating · Static load rating · Limiting speed · Lubrication · Operating temperature · Precision standard · Ring material · Rolling element material · Limiting speed — grease · Limiting speed — oil · Noise / vibration test method · Manufacturer series · Manufacturer suffix · Ball count · Ball diameter · Reference mass.

Ask the manufacturer for these when you enquire.

Other designations with the same 9x30x10 mm envelope.

Same envelope, but sealing, internal design, clearance and load capability differ — not interchangeable by default.

Neighbouring designations documented here.

Each envelope shown is that designation’s own published size.