Bearing Test Machine This design makes tapered roller bearings particularly

This design makes tapered roller bearings particularly suitable for the accommodation of combined (radial and axial) loads. Most of axial load bearing capacity is determined by the contact angle α; vibration measurement greater the α angle, the higher the axial load capacity. Angle size to calculate the coefficient e; e value, the greater the contact angle, the bearing axial load greater applicability.  Hydrodynamic Bearing  Four-row cylindrical roller bearings are usually separated type, namely with roller and cage assembly components of the inner cone and cone outer (outer) installed separately. Four cylindrical roller bearings are widely used in automotive, mill, mining, metallurgy,  aviation bearing   plastics machinery and other industries. Four-row cylindrical roller bearings have tapered inner and outer ring raceways, tapered rollers are arranged between the two. All conical surface projection lines are a little get together with the bearing axis.

Rolling mill bearing raceway relative displacement

If paired installation, so that one pair of bearing outer ring relative to that wide side face of wide and narrow side sealed angular contact ball bearing facing the narrow end. This can avoid additional axial force, and the shaft or housing to limit axial clearance within the range in both directions.
Its inner and outer ring Rolling mill bearing raceway relative displacement on the horizontal axis, so it angular contact ball bearing can support radial load and axial load - combined load (single row angular contact ball bearings can withstand axial load in one direction, so often paired installation).
Cage made ​​of brass, synthetic resins, etc., depending on the bearing forms, and application conditions.
More angular contact  Cross roller bearing ball bearings are manufactured abroad bearing manufacturers, domestic applied to imported equipment such as more angular contact ball bearings 3204RS, and so on.

the gears meshing conditions should be consistent with the requirements of precision

 Changes should be noted that the noise of tower cranes in use and turning resistance moment, if irregularities should be overhauled.

slewing lifting or storage must be level, not vertical lifting or storage, in order to avoid distortion.

 fully tighten the bolts in the past, should be checked meshing gears, the gears meshing conditions should be consistent with the requirements of precision: the contact spots that slight braking gear pair at the tooth surface distribution of the latter is not running in the tooth height direction less Bearing test machine‍ than 25% in the longitudinal direction of the tooth is not less than 30%.

 tooth surface work 10 shift debris should be removed once and re-coated with grease.

To ensure the reliability of the bolt work, avoid inadequate bolt preload, the first 100 hours and 500 hours after slewing work should be separately checked pretension bolts. Then every 1000 hours of operation should be checked once pretension.

 connection slewing ring bolts and nuts high speed bearing‍ are made of high-strength bolts and nuts; double nuts and lock.

 When tightening the nut, should topcoat oil and nuts threaded end of the bolt and torque wrench should be used uniformly in the circumferential direction of symmetry repeatedly tightened. Finally, tighten again when the bolt tightening torque of each should be roughly uniform.

On the slewing ring raceway surface parts are aligned cloth 4 cup oil, thereby adding grease to the Raceway. Under normal circumstances, slewing operation 50 hours lubricated once. Every time you must add a little oil until the oil leaking from the seal so far.‍