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6706 — 30 × 37 × 4 mm

BOUNDARY DIMENSIONSUNIT / mm
B = 4 mmD = 37 mmd = 30 mm
Boundary dimensions · schematic, not a product photograph or manufacturing drawing.
Deep groove ball

6706

6706 is a deep groove ball designation documented on BearingIndex from 2 independent manufacturer publications. The published boundary dimensions are 30 × 37 × 4 mm. The designation ends in bore code 06, which resolves to a 30 mm bore under ISO 15 and matches what the manufacturers published. The publishing works are in Zhejiang, Shanghai provinces, China. Every value below comes from that manufacturer’s own published material, with the date it was recorded.

Bore d
30 mm
Outside D
37 mm
Width B
4 mm

Compare the 2 publications

What each manufacturer published.

ManufacturerDynamic load rating (kN)Static load rating (kN)Limiting speed — grease (rpm)Limiting speed — oil (rpm)Reference mass (kg)Source recorded
SFH
6706		—————2026-09-24Request
RCL
6706		1.140.9516000190000.00832026-09-24Request

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.

FigureHow it is obtainedResult
Radial section height(D − d) / 23.5 mm
Mean diameter dm(D + d) / 233.5 mm
Speed factor dm · nmean diameter × highest published limiting speed636,500 mm·min−1
C / C₀ load ratiodynamic ÷ static load ratingRCL 1.2

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

The works that publish 6706.

RCL

Ningbo, Zhejiang, China

Thin-wall ball bearings for compact mechanisms

Ningbo Shilong manufactures high-precision bearings under the RCL name. Its published catalogue includes 67, 68, 69 and 60 series, with an emphasis on thin-wall bearings for compact mechanisms. Application pages identify encoders, motors, robots, bicycles and circular looms. Space envelope and rotational requirements are useful starting points for a technical inquiry.

Published ranges: 67- and 68-series thin-wall bearings · 69-series ball bearings · 60-series ball bearings

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

Ask RCL about 6706

SFH

Shanghai, China

Miniature and thin-section ball bearings

Shanghai Hengan manufactures miniature bearings under the SFH brand, with a factory in Wuxi and technical and inspection functions in Shanghai. Its catalogue covers metric, inch and flanged deep groove bearings, thin-section designs, double-row angular contact bearings and thrust bearings. Special nonstandard designs are also listed.

Published ranges: Metric and inch miniature deep groove bearings · Flanged miniature bearings · Thin-section ball bearings · Double-row angular contact and thrust bearings

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

Ask SFH about 6706

Applications the publishing works state.

ApplicationStated by
BicyclesRCL
Circular loomsRCL
Encoders and motorsRCL
Precision machinerySFH
Precision motorsSFH
RoboticsRCL

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 · Limiting speed · Lubrication · Operating temperature · Precision standard · Ring material · Rolling element material · Noise / vibration test method · Manufacturer series · Manufacturer suffix · Ball count · Ball diameter.

Ask the manufacturer for these when you enquire.

Neighbouring designations documented here.

DesignationEnvelope d × D × B (mm)Bearing familyWorks
670010 × 15 × 3Deep groove ball3
6700ZZ/2RS10 × 15 × 3Deep groove ball1
670112 × 18 × 4Deep groove ball3
6701ZZ/2RS12 × 18 × 4Deep groove ball1
670215 × 21 × 4Deep groove ball3
6702zz15 × 21 × 4Deep groove ball1
6702ZZ/2RS15 × 21 × 4Deep groove ball1
670317 × 23 × 4Deep groove ball3
6703ZZ/2RS17 × 23 × 4Deep groove ball1
670420 × 27 × 4Deep groove ball3
670525 × 32 × 4Deep groove ball2
6705zz25 × 32 × 4Deep groove ball1
670735 × 44 × 5Deep groove ball1
6707zz35 × 44 × 5Deep groove ball1
670840 × 50 × 6Deep groove ball1
6708zz40 × 50 × 6Deep groove ball1
670945 × 55 × 6Deep groove ball1
6709zz45 × 55 × 6Deep groove ball1

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

Request a quote for 6706.

Tick the works you want above, then send one enquiry — each manufacturer answers you separately and cannot see the others.

Open your enquiry How sourcing works here →

Figures on this page are each manufacturer’s own published material, recorded on the dates shown. How we check sources →

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