L4-17P9Z Bore 332.994 Mm, Gearless Single Row Ball Slewing Rings (4-point Contact)
The L4-17P9Z 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 L4-17P9Z bearing is a Gearless Single Row Ball Slewing Rings (4-point Contact) with an inner diameter of 332.994 mm , an outer diameter of 500.888 mm, a width of 40.132 mm. 50Mn or 42CrMo rings, chrome-alloy steel rolling mlement. Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
L4-17P9Z bearings ( 332.994 mm x 500.888 mm x 40.132 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 | L4-17P9Z |
| Bearing Type | Gearless Single Row Ball Slewing Rings (4-point Contact) |
| Gears type | Gearless |
| Grease Fittings Design | (4) Drive fitting for 1/4 Drill |
| Units | inch |
| Seal | Open |
| Rows NO. | One |
| Outside - OD Φ [inch] | 19.72 |
| OD Tolerances [inch] | +0.10/-0.10 |
| Inside - ID φ [inch] | 13.11 |
| ID Tolerances [inch] | +0.10/-0.10 |
| IO [inch] | 17.50 |
| IO Tolerances [inch] | +0.10/-0.10 |
| OI [inch] | 15.65 |
| OI Tolerances [inch] | +0.10/-0.10 |
| Overall Hight - HT [inch] | 1.58 |
| HT Tolerances [inch] | +0.04/-0.02 |
| Mounting Holes - OBC [inch] | 18.75 |
| No. Holes - OBC | 8 |
| Mounting Holes - IBC [inch] | 14.13 |
| No. Holes - IBC | 8 |
| Nominal Capacity Compressive Thrust [lbs] | 20000 |
| Nominal Capacity Moment [ft-lbs] | 6100 |
| Min. Mounting Plate Thickness [inch] | 3/4 |
| Weight [lbs] | 40 |
The L4-17P9Z 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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