High precision bearings for combined loads - EVOLMEC - EVMU - 07.2021
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High precision bearings for combined loads

Axial/radial bearings Axial angular contact ball bearings Features Areas of application Axial/Radial Bearings Axial angular contact ball bearings Suffixes for available designs Basic rating life Static load safety factor Static limiting load diagrams Limiting speeds Temperature distribution in the rotary axis system Design regulations Bearing preload Frictional torque Relubrication and initial operations Design of adjacent construction Fitting Static rigidity Accuracy Dimensional tables - EVRT Series Dimensional tables - EVRTS Series Dimensional tables - EVLDF Series Thrust crossed roller...

Axial/radial bearings - Axial angular contact ball bearings Axial/radial bearings - Axial angular contact ball bearings Technical features Technical features Axial/radial bearings Axial angular contact ball bearings Axial/radial bearings EVRT and EVRTS and axial angular contact ball bearings EVLDF are ready-to-fit high precision bearings for high precision applications with combined loads. Axial/radial bearings EVRT and EVRTS have an axial component and a radial component. Axial angular contact ball bearings EVLDF comprise a single-piece outer ring, a two-piece inner ring and two ball and...

Axial/radial bearings - Axial angular contact ball bearings Axial/radial bearings - Axial angular contact ball bearings Technical features Technical features Basic rating life Static limiting load diagrams The load carrying capacity and life must be checked for the radial and axial bearing component. The static limiting load diagrams can be used: Please contact our technical department in order to check the basic rating life. The speed, load and operating duration must be given. • For rapid checking of the selected bearing size under predominantly static load • For calculation of the...

Axial/radial bearings - Axial angular contact ball bearings Axial/radial bearings - Axial angular contact ball bearings Technical features Limiting speeds In bearing selection, the following guidelines and the limiting speeds must be observed, see dimension tables. If the environmental conditions differ from the specifications in relation to adjacent construction tolerances, lubrication, ambient temperature, heat dissipation or from the normal operating conditions for machine tools, the stated limiting speeds must be checked. Please contact us. Axial/radial bearings EVRT Axial/radial...

Axial/radial bearings - Axial angular contact ball bearings Axial/radial bearings - Axial angular contact ball bearings Technical features Technical features Frictional torque Guide values for frictional torque MR Relubrication and initial operations Initial operations The bearing frictional torque MRL is influenced primarily by the viscosity and quantity of the lubricant and the bearing preload: The stated frictional torques MR are statistically determined guide values for bearings with grease lubrication after a grease distribution cycle (Figure 14 - page 11). Figure 11 shows measured...

Axial/radial bearings - Axial angular contact ball bearings Axial/radial bearings - Axial angular contact ball bearings Technical features Technical features Design of adjacent construction Geometrical defects in the screw mounting surfaces and fits will influence the running accuracy, preload and running characteristics of the bearing arrangement. The accuracy of the adjacent surfaces must therefore be matched to the overall accuracy requirement of the subassembly. The tolerances of the adjacent surfaces must lie within the running tolerance of the bearing. The selection of fits leads to...

Axial/radial bearings - Axial angular contact ball bearings Axial/radial bearings - Axial angular contact ball bearings Technical features Technical features Fit selection depending on the screw connection of the bearing rings Geometrical and positional accuracy of the adjacent construction If the bearing outer ring is screw mounted on the static component, a fit seating is not required or a fit seating can be produced as stated, see tables, pages 14 and 15. If the values in the table are used, this will give a transition fit with a tendency towards clearance fit. The values given in the...

Axial/radial bearings - Axial angular contact ball bearings Axial/radial bearings - Axial angular contact ball bearings Technical features Mounting dimensions H1 and H2 If the height variation must be as small as possible, the H1 dimensional tolerance must conform to the tables, pages 18 and 19, and Figure 16. The mounting dimension H2 defines the position of any worm wheel used, Figure 16 and Figure 17 L-section ring with support ring. Technical features In the case of EVRT...VSP, the L-section ring must also be axially supported over its whole surface in order to achieve the stated...

Axial/radial bearings - Axial angular contact ball bearings Axial/radial bearings - Axial angular contact ball bearings Technical features Technical features EVLDF Dimensional tolerances and mounting dimensions The dimensional tolerances are derived from tolerance class P5. Dimensional tolerances The diameter tolerances stated are mean values in accordance with DIN 620. The geometrical tolerances correspond to P4 in accordance with DIN 620, see table. Mounting dimensions EVLDF Dimensional tolerances and mounting dimensions The bearing bore in series EVRT and EVRTS may be slightly conical in...

Axial/radial bearings - Axial angular contact ball bearings Axial/radial bearings - Axial angular contact ball bearings Dimensional tables Dimensional tables EVRT Series Axial-radial bearings, double direction Hole pattern ① Two retaining screws For EVRT 80 and EVRT 100 ② Screw counterbores open 5) Fixing holes Inner ring Outer ring 1) Including retaining screws or threaded extraction holes. Rigidity of bearing position Rigidity of rolling element set 2) Tightening torque for screws to DIN 912 (UNI 5931), grade 10.9. 3) Rigidity values taking account of the rolling element set, the...