Boundary dimensions · schematic, not a product photograph or manufacturing drawing.
Tapered roller
30210
30210 is a tapered roller designation documented on BearingIndex from 1 manufacturer publication. The published boundary dimensions are 50 × 90 × 21.75 mm. The designation ends in bore code 10, which resolves to a 50 mm bore under ISO 15 and matches what the manufacturers published. 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.
Cixi Lingfan manufactures bearings under the PLB name. Its company presentation describes automotive alternator and steering bearings, motor bearings, precision spindle bearings and nonstandard designs. The published production envelope is bore 3–40 mm and outside diameter 10–100 mm, subject to exact model confirmation. Buyers should include the intended assembly and operating conditions.
Published ranges: Automotive alternator and steering bearings · Motor bearings · Precision spindle-bearing applications · Nonstandard bearing designs
124 designations documented here · 1 reviewed evidence record · source recorded 2026-09-24
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 50x90x20 mm envelope.
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