CRBB 17020 WW C8 P2 Bore 170 Mm, Split Outer Ring Type (CRBA) Crossed Roller Bearings, Sealed Type
The CRBB 17020 WW C8 P2 Crossed roller bearings are suitable for high-precision, high-rigidity, and space-constrained rotary applications. Classic applications include industrial robot joints and positioners, CNC machine tool rotary tables and indexing heads, medical CT scanner rotating frames, radar antenna rotation mechanisms, precision measuring instruments, and aerospace simulation rotary tables.
The CRBB 17020 WW C8 P2 bearing is a Split outer ring type (CRBA) crossed roller bearings, sealed type with an inner diameter of 170 mm , an outer diameter of 220 mm, a width of 20 mm. It typically uses P2 = (ISO Class 2 / ABEC-9) grade precision tolerances and 50Mn,42CrMo rings, GCr15 rolling mlement. It primarily bears radial, thrust and moment, Its dynamic radial rated load is approximately 52300 N, its static radial rated load is approximately 103600 N. Its dynamic axial rated load is approximately 116000 N, its static axial rated load is approximately 235000 N. It uses C8: Negative clearance standard radial clearance, WW: Double sides Sealed type type, NBR (Nitrile Butadiene Rubber). together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
CRBB 17020 WW C8 P2 bearings ( 170 mm x 220 mm x 20 mm) have the advantages of The rollers are arranged in a cross pattern, allowing them to withstand radial, axial, and overturning moments simultaneously. They offer high rigidity and rotational accuracy while compact and space-saving design, and easy installation, and are therefore widely used in the Industrial robots, CNC machine tools, medical equipment, precision measuring instruments and aerospace.
| Part Number | CRBB 17020 WW C8 P2 |
| Bearing Type | Split outer ring type (CRBA) crossed roller bearings, sealed type |
| Mounting Holes | Without mounting holes |
| Design | Split inner ring (two inner semi-rings and an outer ring), outer ring rotation |
| Rolling Element Type | Cylindrical Rollers |
| Rows NO. | One |
| Manufacturer Part Code | CRBB17020WWC8P2 |
| Load | radial, thrust and moment |
| Seal symbol | WW: Double sides Sealed type |
| Seal Material | NBR (Nitrile Butadiene Rubber) |
| Accuracy class | P2 = (ISO Class 2 / ABEC-9) |
| Temperature - T(min) [°C] | -30 |
| Temperature - T(max) [°C] | 120 |
| Interchangeable | HIWIN CRBB 17020 WW C8 P2 |
| Inner/Outer Ring Material | 50Mn,42CrMo |
| Rolling Element Material | GCr15 |
| Axial internal clearance | C8: Negative clearance |
| C8 [µm] | -10 (min), 0 (max) |
| d φ Inside [mm] | 170 |
| D Φ Outside [mm] | 220 |
| T,B Width [mm] | 20 |
| dOH Oil Holes [mm] | 2.5 |
| Cr Radial Dynamic [N] | 52300 |
| C0r Radial Static [N] | 103600 |
| Ca Dynamic Axial [N] | 116000 |
| C0a Static Axial [N] | 235000 |
| m Weight [kg] | 2.12 |
| nB Reference speed (grease) [r/min] | 300 |
| nG Limiting speed (oil) [r/min] | 410 |
| Mounting dimensions - da [mm] | 183 |
| Mounting dimensions - du [mm] | 181 |
| Mounting dimensions - Da [mm] | 203 |
| Ca max Fillet Radius [mm] | 1.5 |
| Td max Idling torque [Nm] | 2.1 |
The CRBB 17020 WW C8 P2 Crossed roller bearings consist of inner and outer rings, cylindrical rollers, spacers, and seals. The rollers are arranged at 90° intervals within a V-shaped raceway, allowing for multi-directional load bearing even in a single row.
Crossed roller bearings can simultaneously withstand radial loads, bidirectional axial loads, and overturning moments. They possess extremely high rigidity and rotational accuracy, and their compact structure saves installation space, simplifying machine tool design.
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