THE BEARINGINDEX DIRECTORY

MR104 — 4 × 10 × 4 mm

BOUNDARY DIMENSIONSUNIT / mm

Boundary dimensions · schematic, not a product photograph or manufacturing drawing.

Deep groove ball

MR104

MR104 is a deep groove ball designation documented on BearingIndex from 1 manufacturer publication. The published boundary dimensions are 4 × 10 × 4 mm. The publishing works are in Zhejiang province, China. Every value below comes from that manufacturer’s own published material, with the date it was recorded.

Bore d: 4 mm
Outside D: 10 mm
Width B: 4 mm

Compare the 1 publication

What each manufacturer published.

Manufacturer	Dynamic load rating (kN)	Static load rating (kN)	Limiting speed — grease (rpm)	Limiting speed — oil (rpm)	Reference mass (kg)	Source recorded
RCL MR104	0.585	0.2	50000	60000	0.00134	2026-09-24	Request

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.

Figure	How it is obtained	Result
Radial section height	(D − d) / 2	3 mm
Mean diameter d_m	(D + d) / 2	7 mm
Speed factor d_m · n	mean diameter × highest published limiting speed	420,000 mm·min⁻¹
C / C₀ load ratio	dynamic ÷ static load rating	RCL 2.93

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

The works that publish MR104.

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 MR104

Applications the publishing works state.

Application	Stated by
Bicycles	RCL
Circular looms	RCL
Encoders and motors	RCL
Robotics	RCL

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.

Other designations with the same 4x10x4 mm envelope.

Designation	Bearing family	Works
F4-10	Thrust	1
F4-10M	Thrust	1

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

Neighbouring designations documented here.

Designation	Envelope d × D × B (mm)	Bearing family	Works
MR104ZZ/2RS	4 × 10 × 3	Deep groove ball	1
MR105	5 × 10 × 4	Deep groove ball	1
MR105ZZ/2RS	5 × 10 × 3	Deep groove ball	1
MR106ZZ/2RS	6 × 10 × 2.5	Deep groove ball	1

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

Request a quote for MR104.

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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