CRB70045 Standard Crossed Roller Bearings Full Complement
The CRB70045 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 CRB70045 bearing is a Standard Crossed Roller Bearings Full Complement with an inner diameter of 700 mm , an outer diameter of 815 mm, a width of 45 mm. It typically uses ABEC-1; ABEC-3; ABEC-5; ABEC-7; 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 313000 N, its static radial rated load is approximately 917000 N. It uses T1; C1; C2 standard radial clearance, Open type type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
CRB70045 bearings ( 700 mm x 815 mm x 45 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 | CRB70045 |
| Bearing Type | Standard Crossed Roller Bearings Full Complement |
| Mounting holes | No |
| Type | CRB |
| Seal Type | Open type |
| Bore Type | Cylindrical |
| Rolling Element Type | cylindrical rollers |
| Oil holes | No |
| Manufacturer Part Code | CRB 70045 |
| Load | radial, thrust and moment |
| Interchangeable | IKO CRB70045 |
| Units | Metric |
| Rows NO. | One |
| Rolling Element Material | GCr15 |
| Inner/Outer Ring Material | 50Mn,42CrMo |
| Lubrication | grease |
| Accuracy class | ABEC-1; ABEC-3; ABEC-5; ABEC-7; ABEC-9 |
| Guidance of cylindrical roller | Full complement |
| Temperature - T(min) [°C] | -20 |
| Temperature - T(max) [°C] | 120 |
| Shaft diameter [inch] | 27.559 |
| d φ Inside [inch] | 27.559 |
| D Φ Outside [inch] | 32.087 |
| B Width [inch] | 1.772 |
| r min Chamfer [inch] | 0.118 |
| da Mounting dimensions [inch] | 28.740 |
| Da Mounting dimensions [inch] | 30.905 |
| nB Reference speed (grease) [r/min] | 66 |
| nG Limiting speed (oil) [r/min] | 99 |
| Cr Radial Dynamic [lbf] | 70362 |
| C0r Radial Static [lbf] | 206141 |
| Internal Clearance | T1; C1; C2 |
| Radial internal clearances - T1 | min: -30 µm , max: 0 µm |
| Radial internal clearances - C1 | min: 0 µm , max: 60 µm |
| Radial internal clearances - C2 | min: 60 µm , max: 120 µm |
| m Bearing Weight [kg] | 46.5 |
| Similar Model | CRB 70045 T1 , CRB 70045 T1 P6 CRB 70045 T1 P5 , CRB 70045 T1 P4 CRB 70045 T1 P2 , CRB 70045 C1 CRB 70045 C1 P6 , CRB 70045 C1 P5 CRB 70045 C1 P4 , CRB 70045 C1 P2 CRB 70045 C2 , CRB 70045 C2 P6 CRB 70045 C2 P5 , CRB 70045 C2 P4 CRB 70045 C2 P2 |
The CRB70045 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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