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Inch tapered roller cone and TDO double cup, 6.0625 in bore, 9.6250 in outside diameter, 3.1250 in cup width. Cone plus double cup as titled.
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| MFR / Brand | Timken |
|---|---|
| MPN | 81606/81963CD |
| Model | 81606 / 81963 CD |
| Bearing Type | Tapered Roller Bearing Cone, Open |
| ID | 6.0625 in |
| OD | 9.6250 in |
| Width | 4.2500 in |
| Material | Steel |
|---|---|
| Series | 81000 |
| Condition | New – Open box |
| Relubrication | Lubrication provision in the double cup outer race (C designation) |
| Base Number | 81606/81963CD |
| Industry Terms | double cup taper bearing; TDO two row taper roller; double outer race; cone and double cup set; two-raceway taper cup; mill roll neck bearing |
| Common Misspellings | 81963CD; 81963C D; 8196CD; 81936CD; 81606-81963C; taper rolller double cup; tappered roller cone and cup |
| Application Types | Mill roll necks; mining and crushing equipment; crane and hoist sheaves; large gearbox shafts; kiln trunnions |
| Condition Note | Made In USA, New Old Stock |
| Bore Shaft Size | 6.0625 in / 153.99 mm (cone 81606) |
| Mpn Variants | 81606/81963CD; 81606-81963CD; 81963CD; 81963-CD; 81606; 81963CD-20081 |
| Distributor Stock Numbers | Motion 00660557 (81963CD-20081) |
| Compatible With Replaces | Double cup 81963CD, cone 81606. Reference assembly 81600/81963CD = 6.0000 x 9.6250 x 4.2500 in. Related cones on the same double cup: 81575, 81600, 81629 |
| Arrangement Configuration | Timken 81606 cone plus Timken 81963CD double cup. A complete TDO assembly uses two cones, one double cup and a ground cone spacer. |
| Min Temp | -54 °C |
| Cage Type | Stamped |
| Dynamic Load Rating | 134 kN / 30100 lbf |
| Static Load Rating | 166 kN / 37300 lbf |
| Precision Rating | Class 2 |
| Rolling Elements | Tapered Rollers |
| Max Temp | 120 °C |
| Item Weight | 37.0 lbs |
| Cage Material | Steel |
| Number Of Rows | 2 raceways in the double cup ring |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.20.00 |
| Mounting Arrangement | TDO – Tapered Double Outer, two cone rows back to back |
| Design Units | Inch (Imperial) |
| Bearing Material | Chrome alloy bearing steel |
| Part Number | 81606/81963CD |
| Cross Reference 1 | 81963CD |
|---|---|
| Cross Reference 2 | 81606 |
| Cross Reference 3 | 81600/81963CD |
| Cross Reference 4 | 81963CD-20081 |
A Timken 81606 inch tapered roller bearing cone together with a Timken 81963CD double cup — one outer ring carrying two tapered raceways with a lubrication provision. Inch (imperial) series, TDO family. The 81606 cone bore is 6.0625 in and the 81963CD double cup outside diameter is 9.6250 in.
81606 is the cone number. On the cup, the D suffix marks a double cup — a single ring with two raceways — and the C denotes the outer-race lubrication provision. TDO is Tapered Double Outer: a complete TDO assembly is built from two cone rows seated back to back inside one double cup, so it uses two 81606 cones and one 81963CD.
Two cone rows in a single double cup take thrust in both directions and set the two load lines wide apart inside one housing bore, which resists overturning moment from a short shaft length. Grinding both raceways into one ring keeps the rows square to each other without shimming the housing, and it reduces the assembly to one press fit rather than two. At 9.6250 in outside diameter over a 6.0625 in bore this is a heavy-section mill and mining size.
Cone bore (81606): 6.0625 in / 153.99 mm
Double cup outside diameter (81963CD): 9.6250 in / 244.475 mm
Double cup width (C): 3.1250 in / 79.375 mm
Raceways in the cup ring: 2
Series: 81600 / 81900 inch tapered, TDO
Rolling element: tapered roller, chrome alloy steel
Cage: pressed steel
Reference TDO envelope 81600/81963CD: 6.0000 × 9.6250 × 4.2500 in
Supplied as a Timken 81606 cone and a Timken 81963CD double cup, as titled. A complete TDO assembly uses two cones, one double cup and, on most arrangements, a ground cone spacer.
81963CD is the Timken double-cup number and carries unchanged across the inch tapered interchange; Motion lists it as stock number 81963CD-20081. Cones 81575, 81600 and 81629 also run against this double cup and each has a different bore, so they are related sizes within the same cup family rather than substitutes for an 81606.
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