LL789949/LL789910XDTimkenTapered Roller
LL789949/LL789910XD is a Timken tapered roller bearing, bore 1828.8 mm, O.D. 2006.6 mm, height 177.8 mm. Dimensions, drawing, interchanges and price.
Original catalogue drawing - Timken TRB Catalog, page 608
Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.
Scale cross-section
Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.
Dimension table (mm / inch)
| Symbol | Dimension | mm | inch |
|---|---|---|---|
| d | Bore diameter | 1828.8 | 72 |
| D | Outside diameter | 2006.6 | 79 |
| T | Overall assembly width | 177.8 | 7 |
| C | Cup / outer-ring width | 123.825 | 4.875 |
| r | Chamfer (min) | 3.3 | 0.1299 |
Notes
Tapered roller bearings are cone / cup assemblies; cone and cup weights are listed separately and the total is their sum. Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.
Main dimensions
| Bore d (mm) | 1828.800 |
|---|---|
| Bore d (in) | 72.0000 |
| Outside dia. D (mm) | 2006.600 |
| Outside dia. D (in) | 79.0000 |
| Overall width T (mm) | 177.800 |
| Overall width T (in) | 7.0000 |
| Cup width C (mm) | 123.825 |
| Cup width C (in) | 4.8750 |
Load ratings & speeds
| Basic dynamic load rating Cr (lbs) | 1140000 |
|---|---|
| Basic dynamic load rating Cr (N) | 5080000 |
| Dynamic rating C1 (N, ISO) | 5080000 |
| Dynamic rating C1 (lbf, ISO) | 1140000 |
| Radial rating C90 (N) | 757000 |
| Radial rating C90 (lbf) | 170000 |
| Thrust rating Ca90 (N) | 613000 |
| Thrust rating Ca90 (lbf) | 138000 |
| Factor e | 0.47 |
| Factor Y1 | 1.43 |
| Factor Y2 | 2.12 |
| Factor K | 1.23 |
| Geometry factor G1 | 83190.9 |
| Geometry factor G2 | 15410.2 |
| Geometry factor Cg | 0.6006 |
Weight
| Weight (kg) | 589.45 |
|---|
Mounting dimensions (fillets / shoulders)
| Shaft fillet R max (mm) | 6.4 |
|---|---|
| Housing fillet r max (mm) | 3.3 |
| Shaft shoulder db (mm) | 1865.0 |
| Housing shoulder Da (mm) | 1970.0 |
Bearing life (ISO 281 basic rating life)
| C / P | Equivalent load P (N) | L10 (106 rev) | L10h at 500 rpm |
|---|---|---|---|
| 4 | 1,270,000 | 102 | 3,386 |
| 6 | 846,667 | 392 | 13,083 |
| 8 | 635,000 | 1,024 | 34,133 |
| 10 | 508,000 | 2,154 | 71,814 |
| 15 | 338,667 | 8,323 | 277,449 |
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 5,080,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.
Source & traceability
| Brand | Timken |
|---|---|
| Source catalogue | Timken Tapered Roller Bearing Catalog (2016) |
| Catalogue page | p.608 (dimensions) |
| Series type | TDO |
ISO dynamic rating C1, Timken C90 / Ca90, static rating C0, geometry factors and assembly weight.
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