Tapered Roller Bearings
Tapered Roller Bearings - Image 2
Tapered Roller Bearings - Image 3
Tapered Roller Bearings - Image 4

Tapered Roller Bearings

Capable of bearing relatively large combined radial and unidirectional axial loads with high load-carrying capacity. It can bear bidirectional axial loads when used in pairs. High rigidity, better resistance to combined load and shock load than ball bearings. Bearing clearance can be adjusted during assembly to control preload conveniently. Separable structure; the inner assembly (rollers, cage, inner ring) and outer ring can be mounted separately for easy disassembly.

Category:

I. Part-Number Composition (GB/T 297)

Basic 5-digit Designation

1st digit: Type code — 3 = Tapered roller bearing

2nd-3rd digits: Dimension-series code (width + diameter); common values: 02, 03, 22, 23

4th-5th digits: Bore diameter d (mm). 00 = 10 mm, 01 = 12 mm, 02 = 15 mm, 03 = 17 mm; multiply by 5 for codes ≥ 04.

Suffix Codes (Supplementary)

E: Enhanced design  X: Non-standard boundary dimensions  B: Large contact angle - K: Tapered bore

II. Double-Row / Four-Row Bearings (GB/T 299)

Part-number examples: 352220E, 352230, 352926X2  Dimension notation: d × D × T (total width)

III.Main Applications

Applied for heavy combined radial-axial loads and shock loads:

Automobiles: wheel hubs, differentials, gearboxes Reducers, gear boxes Engineering machinery

excavators Rolling mills, mining machinery Cranes

conveyors Machine tool spindles Tractors, agricultural machinery

Model d(mm) D(mm) T(mm) B(mm) C(mm) Cr(kN) Cor(kN) Grease (r/min) Oil (r/min) W(kg)
30202 15 35 11.75 11 10 22.8 21.5 9000 12000 0.053
30203 17 40 13.25 12 11 20.8 21.8 9000 12000 0.079
30204 20 47 15.25 14 12 28.2 30.5 8000 10000 0.127
30205 25 52 16.25 15 13 32.2 37.0 7000 9000 0.154
30206 30 62 17.25 16 14 41.6 45.8 6200 8500 0.225
30207 35 72 18.25 17 15 51.9 56.4 5200 7100 0.330
30208 40 80 19.75 18 16 59.9 67.6 4600 6400 0.450
30304 20 52 16.25 15 13 35.2 36.2 7500 9500 0.160
30305 25 62 18.25 17 15 46.8 48.0 6300 8000 0.260
30306 30 72 20.75 19 16 59.0 63.0 5300 6700 0.385
30307 35 80 22.75 21 18 72.2 79.5 4800 6000 0.515
32204 20 47 19.25 18 15 33.1 34.7 7800 10000 0.160
32205 25 52 19.25 18 16 37.8 41.5 6700 8500 0.179
32206 30 62 21.25 20 17 51.8 54.2 5700 7300 0.294
32207 35 72 24.25 23 19 70.5 74.2 4900 6200 0.430

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