THE BEARINGINDEX DIRECTORY

SFR1-4ZZ — 1.9844 × 6.35 × 3.5712 mm

BOUNDARY DIMENSIONSUNIT / mm

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

Ball bearings

SFR1-4ZZ

SFR1-4ZZ is a ball bearings designation documented on BearingIndex from 1 manufacturer publication. The published boundary dimensions are 1.9844 × 6.35 × 3.5712 mm. The publishing works are in Fujian province, China. Every value below comes from that manufacturer’s own published material, with the date it was recorded.

Bore d: 1.9844 mm
Outside D: 6.35 mm
Width B: 3.5712 mm

Compare the 1 publication

What each manufacturer published.

Manufacturer	Reference mass (kg)	Source recorded
Runstar SFR1-4ZZ	0.00053	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	2.18 mm
Mean diameter d_m	(D + d) / 2	4.17 mm

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

The works that publish SFR1-4ZZ.

Runstar

Zhangzhou, Fujian, China

Miniature ball and thrust bearings

Zhangzhou Runshida manufactures miniature and small deep groove ball bearings and flat thrust ball bearings under the Runstar name. Its published company scope gives a bore range of 1–50 mm and includes nonstandard development. Applications span instruments, small motors, appliances, medical equipment and fishing tackle; dimensions and closures still require model-specific confirmation.

Published ranges: Miniature deep groove ball bearings · Small deep groove ball bearings · Flat thrust ball bearings · Nonstandard miniature designs

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

Ask Runstar about SFR1-4ZZ

Applications the publishing works state.

Application	Stated by
Fishing tackle	Runstar
Medical equipment	Runstar
Precision instruments	Runstar
Small motors	Runstar

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.

Ask the manufacturer for these when you enquire.

Other designations with the same 1.9844x6.35x3.5712 mm envelope.

Designation	Bearing family	Works
FR1-4 2RSEE	Ball bearings	1
FR1-4ZZEE	Ball bearings	1
SFR1-4 2RS	Ball bearings	1
SR1-4 2RS	Deep groove ball	1
SR1-4 2RS EE	Deep groove ball	1
SR1-4ZZ	Deep groove ball	1
SR1-4ZZ EE	Deep groove ball	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
SFR1-4	1.9844 × 6.35 × 2.3812	Ball bearings	1
SFR1-4 2RS	1.9844 × 6.35 × 3.5712	Ball bearings	1
SFR144	3.175 × 6.35 × 2.3812	Ball bearings	1
SFR144ZZ	3.175 × 6.35 × 2.7788	Ball bearings	1

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

Request a quote for SFR1-4ZZ.

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 →

Continue your search.

All ball bearings models →About this bearing type →How to read evidence →