CROSSED ROLLER BEARINGS

Germany HIWIN GmbH Brücklesbünd 1 77654 Offenburg Deutschland Fon +49 781 93278-0 [email protected] hiwin.de Taiwan Headquarters HIWIN Technologies Corp. No. 7, Jingke Road Precision Machinery Park Taichung 40852 Táiwān Fon +886 4 2359-4510 [email protected] hiwin.tw Taiwan Headquarters HIWIN Mikrosystem Corp. No. 6, Jingke Central Road Precision Machinery Park Taichung 40852 Táiwān Fon +886 4 2355-0110 [email protected] hiwinmikro.tw France HIWIN SAS Le Mélèze 17 Rue des Cigognes 67960 Entzheim France Fon +33 3 882884-80 [email protected] hiwin.fr Poland HIWIN GmbH Biuro Warszawa ul. Puławska...

CROSSED ROLLER BEARINGS HIWIN crossed roller bearings consist of an inner ring, an outer ring, and cylindrical rollers arranged at 90° with spacers between them. This crosswise arrangement of cylindrical rollers means that only the one bearing can absorb axial forces from both directions, radial forces, overturning torque loads, and any combination of these. HIWIN crossed roller bearings are very rigid with highly compact dimensions and a high running precision. DOWNLOADS AND APPLICATIONS Assembly instructions Sizing tool

Crossed Roller Bearings Contents

2.3 Layout of crossed rotter bearings 8 2.4 Order code for crossed rotter bearings 9 2.5 Crossed rotter bearings series 9 3.1 Setecting a crossed rotter bearing 14 3.4 Securing and designing the bearing seat and mounting ftange 17

Product overview 1. Product overview Crossed roller bearings CRBA - Solid inner ring - Two-part outer ring - For inner ring rotation Crossed roller bearings CRBB - Two-part inner ring - Solid outer ring - For outer ring rotation Crossed roller bearings CRBC - Solid inner ring - Solid outer ring - For inner and outer ring rotation Crossed roller bearings CRBD - Two-part outer ring - For inner ring rotation - With mounting flange Crossed roller bearings CRBE - Solid inner and outer ring - For inner and outer ring rotation - With mounting flange

Crossed roller bearings CRBX - individual connecting geometry - individual flange bores - individual surface treatment

General information HIWIN crossed roller bearings are characterised by high rigidity, very high concentricity, and high torque loading in all directions. Thanks to these advantages, they are ideal for applications e.g. in industrial automation systems, robots, machine tools, precision rotary tables, measuring machines, and medical equipment. The HIWIN range encompasses six different series of crossed roller bearings. - Patented design for high loadability - High rigidity - Simultaneous loading in all directions - Low-friction rotation - Compact, space saving design - Various bearing types and...

2.4 Order code for crossed roller bearings CRBD Accuracy class: P2: CRBA, CRBB, CRBC, CRBE P4: CRBA, CRBB, CRBC 3), CRBD, CRBE 3) C8: Preloaded (standard), see Table 2.9 C1: Slight play WW: Seals grinding on both sides (standard) NN: Open type without seals CRBA: With split outer ring CRBB: With split inner ring CRBC: With solid inner and outer ring CRBD: With split outer ring and mounting flange CRBE: With solid inner and outer ring and mounting flange CRBX: Customer specific model Bearing inner diameter- Bearing width- Mounting holes:- Without: No mounting holes 1) A: Threaded holes on the...

Bearings fitted with seats grinding on both sides effectively prevent foreign bodies from penetrating the track and lubricant from leaking out. The open models without seals are characterised by a lower frictional resistance. These bearings are particularly suitable for low-torque applications. Table 2.2 Tolerance of the bearing's internal diameter - CRBA, CRBB, CRBC, CRBD, CRBE Inner diameter tolerances A dm Note: the value dmp is the arithmetic mean of the maximum and minimum internal diameter 1. HIWIN CRBA, CRBB available in accuracy classes P5, P4, P2. For other requirements, please contact...

1. The CRBA series is available in the accuracy classes P5, P4 and P2. 2. The CRBC series is available in the accuracy classes P4 and P2.

General information Table 2.6 Rotational accuracy of the outer ring - CRBB, CRBC

Table 2.8 Rotational accuracy of the inner and the outer ring – CRBE Model Radial runout tolerance of inner ring Kia Axial runout tolerance of inner ring Sia Radial runout tolerance of outer ring Kea Axial runout tolerance of outer ring Sea Table 2.9 Preload Nominal diameter d [mm] Slight play

Crossed Roller Bearings Design properties and selection 3. Design properties and selection 3.1 Selecting a crossed roller bearing The choice of crossed roller bearing depends on the conditions of use. Confirmation of application conditions Service life —> Dynamic load capacity Rotation type and assembly method Bearing dimensions CRBA CRBB CRBC CRBD CRBE CRBX Ambient conditions —> Sealing Rigidity —> Preload class Accuracy —> Accuracy class Bearing specifications 3.2 Formulae 3.2.1 Dynamic equivalent load When radial and axial loads as well as torques are acting on the bearing, all loads can be...

3.2.3 Static equivalent load The statically equivalent load P0 is a calculated theoretical load. It exerts the same load on the centre of the contact site under the highest load between the rolling element and the track as the actual effect of the combined load. Static equivalent load [N] Axial load [N] orque [Nmm] Roller's half-height diameter [mm] 3.2.4 Static load safety factor The static structural safety fS is the ratio of the static load rating C0 and the equivalent static load P0 (F 3.4). The recommended static structural safety based on the operating conditions is given in Table 3.1:...

Crossed Roller Bearings Design properties and selection 3.2.5 Example calculation of nominal service life and static structural safety L Bearing CRBA 15025 WW: Inner diameter d 150 mm Outer diameter D 210 mm Roller’s half-height diameter DPW 180 mm Dynamic load rating C 73,100 N Static load rating C0 131,900 N W1 800 N W2 2,200 N Radial load Fr 3,000 N L 800 mm Calculation: Radial load: Fr = 3,000 N Axial load: Fa = W1 + W2 = 800 N + 2,200 N = 3,000 N Torque: M = W1 × L = 800 N × 800 mm = 640,000 Nmm Roller’s half-height diameter: DPW = (d + D)/2 = (150 mm + 210 mm)/2 = 180 mm 3,000 Fa ≈ 0.297...