YRC325 Bore 325 Mm, Combined Radial Axial Cylindrical Roller Bearing, Double Direction, YRC
The YRC325 Rotary table bearings are suitable for high-precision, high-rigidity rotary applications. Classic applications include CNC machine tool rotary tables and indexing tables, industrial robot joints, military radar antennas, aerospace measurement equipment, astronomical telescopes, and medical devices.
The YRC325 bearing is a Combined Radial Axial cylindrical roller Bearing, double direction, YRC with an inner diameter of 325 mm , an outer diameter of 450 mm, a width of 60 mm. 50Mn,42CrMo rings, Its dynamic radial rated load is approximately 165294 N, its static radial rated load is approximately 581819 N. Its dynamic axial rated load is approximately 219839 N, its static axial rated load is approximately 1837343 N. Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
YRC325 bearings ( 325 mm x 450 mm x 60 mm) have the advantages of It can withstand axial, radial and overturning moments simultaneously, has a compact structure, is easy to install, and is suitable for heavy-duty rotation, and are therefore widely used in the high-end CNC machine tools, robots, indexing tables and rotary tables.
| Part Number | YRC325 |
| Mounting | screw |
| Bearing Type | Combined Radial Axial cylindrical roller Bearing, double direction, YRC |
| Manufacturer Part Code | YRC 325 |
| Series | YRC |
| Seal type | Open |
| Rolling Element Type | cylindrical rollers |
| Rolling Element Material | GCr15 |
| Ring Material | 50Mn,42CrMo |
| Rows NO. | Three |
| Alias | Super Precision Bearings for Rotary Tables |
| Reference From | TIMKEN YRC325 |
| Qty of Assembly Screws | 2 |
| Axial Stiffness [kN/µm] | 5.1 |
| Similar model | YRC325G (G: Pre-Greased Option) YRC325P (P: Half-Runout Option) YRC325G-HS (G-HS: High Speed Option) |
| Main Dimensions | |
| d φ Inside [inch] | 12.795 |
| D Φ Outside [inch] | 17.716 |
| H High [inch] | 2.362 |
| H1 [inch] | 1.575 |
| C [inch] | 0.787 |
| D1 [inch] | 16.339 |
| J [inch] | 13.465 |
| J1 [inch] | 16.929 |
| Performance | |
| Cr Dynamic Radial [lbf] | 37158 |
| C0r Static Radial [lbf] | 130792 |
| Ca Dynamic Axial [lbf] | 49419 |
| C0a Static Axial [lbf] | 413034 |
| nB Reference speed (grease) [r/min] | 120 |
| nG Limiting speed (oil) [r/min] | 257 |
| Operating temperature - T(min) [°C] | -30 |
| Operating temperature - T(max) [°C] | 120 |
| Mounting dimensions | |
| d1 Fixing screws (Inner ring) [inch] | 0.366 |
| d2 Fixing screws (Inner ring) [inch] | 0.591 |
| a Fixing screws (Inner ring) [inch] | 0.323 |
| Fixing holes Inner ring Quantity | 34 |
| d3 Fixing screws (Outer ring) [inch] | 0.366 |
| Fixing holes Outer ring Quantity | 33 |
| n Pitch quantity | 36 |
| t Pitch separation angle [°] | 10 |
| t1 Axial and radial runout [µm] | 6 |
| G Threaded extraction hole | M12 |
| Threaded extraction hole Quantity | 3 |
| Additional information |
The YRC325 Rotary table bearings are precision bearings with a thrust-radial combined structure. They mainly consist of a housing ring, a shaft ring, two rows of axial cylindrical roller cage assemblies, and one row of radial cylindrical roller cage assemblies. The housing ring and shaft ring are evenly distributed with mounting screw holes for easy direct fixing.
The advantages of rotary table bearing design are that it can simultaneously withstand radial loads, bidirectional axial loads and overturning moments. The negative clearance preload design ensures extremely high rigidity and rotational accuracy. Moreover, the compact structure greatly simplifies rotary table design and reduces installation and maintenance costs.
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