Delivery Time:45-75 days
Certification:ISO9001, ISO14001

Custom YRT Rotary Table Bearings with Seals YRT80-TV

Features:
YRT precision rotary table bearing is a kind of bearing fixed by a bidirectional thrust bearing and a centripetal-guided bearing. They can support radial loads, axial loads from both directions and tilting moments free from clearance and are particularly suitable for bearing arrangements with high requirements for running accuracy?like rotary tables, millings heads and reversible clamps.Due to the fixing holes in the bearing rings, the units are very easy to fit.
The bearings are radially and axially preloaded after fitting.

Sealing/Lubricant:
YRT bearings are supplied with seals. YRT bearings are greased by a lithium complex soap grease and can be lubricated via the outer ring and L-section ring.

Operating temperature: YRT bearings are suitable for operating temperatures from 30℃ to 120℃
 

Design and safety guidelines

Basic rating life: Please contact us in relation to checking of the basic rating life .The speed , load and operating duration must be given.

Static load safety factor:
The static load safety factor S0 indicates the security against impermissible permanent deformations in the bearing. It is determined as follows:
Static load safety factor :Cor Coa N
Basic static load rating according to dimension tables: For Foa N
Maximum static load on the radial or axial bearing.
Caution! In machine tools and similar areas of application, S0 should be ＞4

Limiting speeds: The bearings allow the limiting speeds given in the dimension tables. The operating temperatures occurring are heavily dependent on the environmental conditions. Calculation is possible by means of a thermal balance analysis based on frictional torque data.

Frictional torque:

The bearing frictional torque MRL is influenced primarily by the viscosity and quantity of the lubricant and the bearing preload. The lubricant viscosity and quantity are dependent on the lubricant grade and operating temperature. The bearing preload is dependent on the mounting fits, the geometrical accuracy of the adjacent parts, the temperature difference between the inner and outer ring, the screw tightening torque and the mounting situation.

Starting torque: For YRT bearing, it must be taken into consideration that the frictional torque can increase by a factor of between 2 and 2.5 with increasing speed.

Accuracy of adjacent construction: The adjacent construction should be produced in accordance with Figure and the tolerances must be in accordance with the tables starting on page. Any deviations will influence the bearing frictional torque , running accuracy and running characteristics.

Requirements for the adjacent construction-YRT.

Legend to Figure:

1.Support over whole bearing height. It must be ensured that the means of support has adequate rigidity.

2.A precise fit is only necessary if radial support due to the load or a precise bearing position is required.

3.Note the bearing diameter D1 according to the dimension tables. Ensure that there is sufficient distance between the rotating bearing rings and the adjacent construction.

Geometrical and positional accuracy of the adjacent construction:

nominal shaft diameter d mm Deviation d Roundness Parallelism Perpendicularity t2, t2, t8, over incl. for tolerance h5 µm µm 50 80 0 -13 3 80 120 0 -15 4 120 150 0 -18 5 150 180 0 -18 5 180