THE BEARINGINDEX DIRECTORY

55TAC120C — 55 × 120 × 20 mm

BOUNDARY DIMENSIONSUNIT / mm

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

Angular contact

55TAC120C

55TAC120C is a angular contact designation documented on BearingIndex from 1 manufacturer publication. The published boundary dimensions are 55 × 120 × 20 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: 55 mm
Outside D: 120 mm
Width B: 20 mm

Compare the 1 publication

What each manufacturer published.

Manufacturer	Static load rating (kN)	Limiting speed — grease (rpm)	Reference mass (kg)	Source recorded
YJB 55TAC120C	116	5000	1.18	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	32.5 mm
Mean diameter d_m	(D + d) / 2	87.5 mm
Speed factor d_m · n	mean diameter × highest published limiting speed	437,500 mm·min⁻¹

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

The works that publish 55TAC120C.

YJB

Hangzhou, Zhejiang, China

Precision spindle and machine-tool bearings

Hangzhou Yijia manufactures precision bearings within the Huaxing group. Its published range includes angular contact ball bearings, cylindrical roller bearings, double-direction thrust angular contact bearings and tapered roller designs. The company describes controlled grinding and assembly environments and applications in machine-tool spindles, medical equipment, instrument motors and robots.

Published ranges: Angular contact ball bearings · Cylindrical roller bearings · Double-direction thrust angular contact bearings · Tapered roller and nonstandard designs

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

Ask YJB about 55TAC120C

Applications the publishing works state.

Application	Stated by
Instrument motors	YJB
Machine-tool spindles	YJB
Medical equipment	YJB
Robotics	YJB

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

Ask the manufacturer for these when you enquire.

Neighbouring designations documented here.

Designation	Envelope d × D × B (mm)	Bearing family	Works
55TAC100C	55 × 100 × 20	Angular contact	1
55TAC90C	55 × 90 × 15	Angular contact	1

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

Request a quote for 55TAC120C.

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

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

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