L9-38E9Z Bore 804.926 Mm, Single Row Ball Slewing Rings With External Gears (4-point Contact)
The L9-38E9Z 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 L9-38E9Z bearing is a Single Row Ball Slewing Rings With External Gears (4-point Contact) with an inner diameter of 804.926 mm , an outer diameter of 1093.216 mm, a width of 89.916 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.
L9-38E9Z bearings ( 804.926 mm x 1093.216 mm x 89.916 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 | L9-38E9Z |
| Bearing Type | Single Row Ball Slewing Rings With External Gears (4-point Contact) |
| Gears type | External Gear |
| Grease Fittings Design | (6) 1/8-27 NPT fittings |
| Units | inch |
| Seal | Double Sealed |
| Seal Material | NBR (Nitrile Butadiene Rubber) |
| Rows NO. | One |
| Outside - OD Φ [inch] | 43.04 |
| OD Tolerances [inch] | -0.03 |
| Inside - ID φ [inch] | 31.69 |
| ID Tolerances [inch] | +0.14/-0.14 |
| IO [inch] | 37.66 |
| IO Tolerances [inch] | +0.14/-0.14 |
| OI [inch] | 37.54 |
| OI Tolerances [inch] | +0.14/-0.14 |
| IE [inch] | 35.16 |
| IE Tolerances [inch] | +0.14/-0.14 |
| Overall Hight - HT [inch] | 3.54 |
| HT Tolerances [inch] | +0.04/-0.04 |
| Mounting Holes - OBC [inch] | 40.00 |
| No. Holes - OBC | 30 |
| Mounting Holes - IBC [inch] | 33.25 |
| No. Holes - IBC | 30 |
| PD [inch] | 42.40 |
| DP 20˚ Stub [inch] | 2.5 |
| No. Of Teeth | 106 |
| Gear hardness (BHN) | 180 |
| Max. Tangential Tooth Load [lbs] | 14700 |
| Nominal Capacity Compressive Thrust [lbs] | 702000 |
| Nominal Capacity Moment [ft-lbs] | 498000 |
| Thread depth [inch] | 1.13 |
| Min. Mounting Plate Thickness [inch] | 2 |
| Standard Pinions | P2.5-5.6D2, P2.5-6.8D2 |
| Weight [lbs] | 360 |
The L9-38E9Z 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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