A18-46E4D Bore 991.362 Mm, Heavy Duty Slewing Rings With External Gears (four-point Contact Ball)
The A18-46E4D Single-row four-point contact ball slewing bearings are widely used in rotational applications requiring the ability to withstand combined loads (axial force, radial force, and overturning moment) and demanding a compact structure and low self-weight, such as engineering machinery (truck cranes, excavators), wind power generation (yaw bearings), port machinery, photovoltaic tracking systems, robotics, and medical devices.
The A18-46E4D bearing is a Heavy Duty Slewing Rings with External Gears (four-point contact ball) with an inner diameter of 991.362 mm , an outer diameter of 1397 mm, a width of 120.65 mm. 50Mn or 42CrMo rings, chrome-alloy steel rolling mlement. Double Sealed type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
A18-46E4D bearings ( 991.362 mm x 1397 mm x 120.65 mm) have the advantages of Compact structure, lightweight, small footprint, high cost-performance ratio, and are therefore widely used in the Robots, construction machinery, wind turbines, radar antennas, and various rotary worktables.
| Part Number | A18-46E4D |
| Bearing Type | Heavy Duty Slewing Rings with External Gears (four-point contact ball) |
| Gears type | External Gear |
| Units | inch |
| Seal | Double Sealed |
| Seal Material | NBR (Nitrile Butadiene Rubber) |
| Rows NO. | One |
| Outside - OD Φ [inch] | 55.000 |
| Inside - ID φ [inch] | 39.03 |
| IO [inch] | 45.90 |
| OI [inch] | 45.80 |
| OE [inch] | 52.44 |
| Overall Hight - HT [inch] | 4.75 |
| OH [inch] | 4.38 |
| IH [inch] | 4.38 |
| Mounting Holes - OBC [inch] | 50.250 |
| OU [inch] | 1.31 |
| No. Holes - OBC | 27 |
| Mounting Holes - IBC [inch] | 41.375 |
| IU [inch] | 1.31 |
| No. Holes - IBC | 36-1 |
| PD [inch] | 54.000 |
| DP [inch] | 2 |
| No. Of Teeth | 108 |
| F [inch] | 4.00 |
| Tooth Form | 20d, Full Depth |
| Tangential Gear Capacity [lbs] | 31400 |
| Nominal Capacity Compressive Thrust [lbs] | 1720000 |
| Nominal Capacity Raceway Moment [ft-lbs] | 1510000 |
| Weight [lbs] | 1186 |
The A18-46E4D Single-row four-point contact ball slewing bearings mainly consist of an inner ring, an outer ring, steel balls, spacers, and a sealing device. The raceways are peach-shaped or arc-shaped, and the steel balls form four-point contact with the inner and outer ring raceways. Gears can be integrated into the inner and outer rings.
Single-row four-point contact ball slewing bearings feature a low axial height and light weight due to their single-row structure. One bearing can simultaneously withstand axial loads, radial loads, and overturning moments. The four-point contact design provides high load-bearing capacity, good rigidity, and easy installation and maintenance.
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