“Based on domestic market and expand overseas business” is our development strategy for Super Purchasing for China Single/Double Row Deep Groove Ball, Angular Contact, Aligning, Thrust, Insert, Pillow Block, Ball/Cylindrical, Spherical, Tapered, Needle Roller Bearing., Our products have exported to North America, Europe, Japan, Korea, Australia, New Zealand, Russia and other countries. Looking forward to build up a good and long term cooperation with you in coming future!
“Based on domestic market and expand overseas business” is our development strategy for Ball Bearing, China Bearing, Our main objectives are to offer our customers worldwide with good quality, competitive price, satisfied delivery and excellent services. Customer satisfaction is our main goal. We welcome you to visit our showroom and office. We’ve been looking forward to establish business relation with you.

Introduction

Double-row cylindrical roller bearings allow a certain axial displacement between the shaft and the bearing pedestal and can be used as non-positioning bearings.This kind of bearing has the advantages of compact structure, large rigidity, large bearing capacity, small deformation after loading, etc., especially suitable for machine tool spindle support.

Features and Benefits

● High load carrying capacity

Because of their second row of rollers, double row cylindrical roller bearings are suitable for heavy radial loads.

● Low friction (Roller end / flange contact area)

The open flange design , together with the roller end design and surface finish, promote lubricant film formation resulting in lower friction and higher axial load carrying capacity.

● Long service life

The logarithmic roller profile reduces edge stresses at the roller/raceway contact and sensitivity to misalignment and shaft deflection.

● Enhanced operational reliability

The surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.

● Separable and interchangeable

The separable components of double row cylindrical roller bearings are interchangeable. This facilitates mounting and dismounting, as well as maintenance inspections.

● High speed capability

The cage designs are suitable for high speeds, rapid accelerations and peak loads.

Application

NUU double row cylindrical roller bearings can be used in machine tools, motor vehicles, motors, reduction gearboxes, vibrating screens, etc.

Usage

The double row cylindrical roller bearing can bear the large du load in the radial direction. It allows the two rows of DAO rollers in the bearing with high speed to be arranged in a cross way. The fluctuation frequency during rotation is twice as high as that of the single row bearing, and the amplitude is reduced by 70%.

There are two kinds of bearings in common use: NN30/W33 and NN30K/W33 series. NNU49/W33 and NNU49K/W33 series bearing outer ring with edge, inner ring can be separated, NN30K/W33 and NNU49K/W33 series inner ring are tapered holes (taper 1:12), which are compatible with the conical journal of the spindle. Axial movement of the inner ring can make the inner ring expand to reduce bearing clearance and even pretighten the bearing.

Cylindrical bore bearings are usually hot-loaded, and interference fit is used to reduce bearing clearance or to achieve the purpose of preloading. NNU49 series bearings with detachable inner ring are generally machined on raceway after installing spindle on inner ring to obtain high spindle rotation accuracy.

Parameters

“Based on domestic market and expand overseas business” is our development strategy for Super Purchasing for China Single/Double Row Deep Groove Ball, Angular Contact, Aligning, Thrust, Insert, Pillow Block, Ball/Cylindrical, Spherical, Tapered, Needle Roller Bearing., Our products have exported to North America, Europe, Japan, Korea, Australia, New Zealand, Russia and other countries. Looking forward to build up a good and long term cooperation with you in coming future!
Super Purchasing for China Bearing, Ball Bearing, Our main objectives are to offer our customers worldwide with good quality, competitive price, satisfied delivery and excellent services. Customer satisfaction is our main goal. We welcome you to visit our showroom and office. We’ve been looking forward to establish business relation with you.