XT Series Four Point Contact Ball Bearing
1. Description
The XT series four point contact ball bearing has rectangular cross section and it belongs to customization products. It is available with the outer diameter not exceeding 218 inches, i.e., 5500mm. This style of slewing bearing enjoys wide applications in occasions where standard products are unable to meet customer requirements on size, weight or performance.
2. Features
a. Owing to the deep groove raceway and balls of the maximum size, this series of four point contact ball bearing is capable of withstanding higher torque, thrust, and radial load than common products.
b. The rolling element bearing is equipped with perfect seal which helps discharge contaminants.
c. This series or deep groove ball bearing is available in three types, no tooth type, internal tooth type, and external tooth type.
3. Supply Capacity
The shortest delivery time can be provided for this series of ball bearing. Custom bearing or other specialized products are also available.
4. Application
This range of ball bearing is often utilized as slewing ring bearing for following machines:
a. Crane
b. Lift/elevator
c. Excavator
d. Wind turbine
e. Universal derrick
f. Shredder
g. Timber loader
h. Logging saws
- XT External Gear
- XT Internal Gear
- XT No Gear
5. Technical Parameters
| No Gear | ||||||||||||||||||||||
| P/N | OUTLINE DIMENSIONS AND WEIGHT | HOLE DATA | GEAR DATA α = 20° | GEAR TOOTH RATING Fz | BEARING MOMENT RATING Crm | |||||||||||||||||
| OUTER RING | INNER RING | |||||||||||||||||||||
| Do | di | H | Ho | Hi | Dr * | dr * | G APPROX. | Lo | no | Bo | Li | ni | Bi | TOOTH FORM | D2 | Pd or (m) | z2 | x2 | b2 | |||
| (in) | (in) | (in) | (in) | (in) | (in) | (in) | (lbs) | (in) | (in) | (in) | (in) | (in) | (in) | (lbs) | (ft-lbs) | |||||||
| 12740001 | 24.650 | 16.250 | 2.375 | 2.063 | 2.063 | — | — | 145 | 22.250 | 16 | 0.813 | 17.750 | 20 | 0.813 | — | — | — | — | — | — | — | 159,000 |
| 12750001 | 26.900 | 18.500 | 2.375 | 2.063 | 2.063 | — | — | 155 | 24.500 | 18 | 0.813 | 20.000 | 24 | 0.813 | — | — | — | — | — | — | — | 188,000 |
| 12770001 | 29.650 | 21.250 | 2.375 | 2.063 | 2.063 | — | — | 180 | 27.250 | 24 | 0.813 | 22.750 | 28 | 0.813 | — | — | — | — | — | — | — | 232,000 |
| 12775001 | 33.534 | 23.125 | 2.875 | 2.563 | 2.563 | — | — | 305 | 30.625 | 18 | 0.938 | 24.875 | 24 | 0.938 | — | — | — | — | — | — | — | 338,000 |
| 12780001 | 38.201 | 27.750 | 2.875 | 2.563 | 2.563 | — | — | 350 | 35.250 | 24 | 0.938 | 29.500 | 28 | 0.938 | — | — | — | — | — | — | — | 443,000 |
| 12785001 | 41.850 | 28.750 | 3.250 | 2.880 | 2.880 | — | — | 530 | 38.000 | 20 | 1.063 | 31.000 | 24 | 1.063 | — | — | — | — | — | — | — | 587,000 |
| 12790001 | 47.444 | 34.250 | 4.250 | 3.875 | 3.875 | — | — | 835 | 43.875 | 24 | 1.188 | 36.250 | 28 | 1.188 | — | — | — | — | — | — | — | 873,000 |
| 16289001 | 61.250 | 52.325 | 3.540 | 2.800 | 2.800 | — | — | 585 | 59.625 | 30 | 0.844 | 54.000 | 30 | 0.844 | — | — | — | — | — | — | — | 348,000 |
| 16389001 | 87.992 | 69.094 | 6.024 | 5.512 | 5.512 | — | — | 3,330 | 83.543 | 52 | 1.535 | 73.543 | 52 | 1.535 | — | — | — | — | — | — | — | 3,675,000 |
| 16290001 | 129.000 | 113.000 | 5.500 | 5.000 | 5.000 | — | — | 3,950 | 125.500 | 72 | 1.063 | 116.500 | 72 | 1.063 | — | — | — | — | — | — | — | 1,337,000 |
| 16291001 | 178.000 | 162.000 | 5.500 | 5.000 | 5.000 | — | — | 5,350 | 174.500 | 96 | 1.063 | 165.500 | 96 | 1.063 | — | — | — | — | — | — | — | 2,258,000 |
