Full-complement double-row cylindrical roller bearings

Dvouřadé válečkové ložisko s plným počtem válečků
Cageless, full-complement cylindrical roller bearings have the maximum possible number of rollers and can sustain much heavier loads than cylindrical roller bearings of the same size with cages. On the other hand, their high-speed capability is inferior to bearings with cages.
 
It is possible to use a smaller and lighter bearing without a cage while retaining the loading capacity and the service life.
These high-capacity bearings are produced in open and sealing designs. Sealing full-complement double row cylindrical roller bearings are often used in construction machines, mainly in crane sheaves. These bearings have an optimised internal design for low speed and high load. The bearings are lubricated and have a lubrication groove and hole. They are also produced with anticorrosive surface treatment for demanding environments.

Three different versions of open bearings:

NNCF – These bearings are a double-row version of the NCF bearings. They have three ribs on the inner ring and one rib on the outer ring. They have a retaining snap ring in the outer ring at the side opposite the outer ring rib. The retaining snap ring should not be axially loaded during operation.
 
RS-48E4, RS-49E4 – Double-row outer ring with centre rib, two single-row inner rings with ribs. The outer and inner rings and rollers are not separable since there are two retaining snap rings at the sides of the outer ring. They can sustain an axial load in either direction so they can be used as fixed-end bearings.
 
RSF-48E4, RSF-49E4 – Double-row outer ring without ribs, double-row inner ring with three ribs. The outer and inner rings and rollers are not separable since there is a retaining snap ring at the middle of the outer ring. They can be used as free-end bearings. An oil groove and holes are provided at the centre of the outer ring.

Shielded bearings

RS-50 – Double-row outer ring with centre rib, two inner rings with ribs. Both sides shielded by contact seals and are pre-lubricated, but it is possible to replenish the grease through an oil groove and holes in parts mating with the inner ring. They can sustain high loads and are suitable for demanding environments as they are surface treated for rust prevention. Mainly used for construction machines. 
 
Bearing series: NNCF, RS-48E4, RS-49E4, RSF- 48E4, RSF-49E4, RS-50, RS-50NR (NSK), NAS 50.. (IKO)

More details in the catalogues:

Dvouřadá válečková ložiska s plným počtem válečků / Dvouřadá válečková ložiska s plným počtem těles - Full complement double row CRB
We are ready to answer your questions.

Leaders in our industry

We strive to offer you the technically optimal solution in the shortest possible time. We save you costs and we are here for you 24 hours a day, 7 days a week, 365 days a year.
 
 
Coroll - výhody

Stock value of more than 3.5 million EUR

Our stock range is built according to the specific needs of our customers and market requirements, so we always deliver on time.
Coroll - výhody

Deliveries from the warehouse within 24 hours

We modify (cut and finish) and deliver linear guides for MRO within 24 hours.

Coroll - výhody

25 years of experience

You can rely on our specialist technical knowledge and skills.
Coroll - výhody

Professional technical support

Our experienced technical team is always on-hand for customer queries and support.
Coroll - výhody

Product quality and origin guarantee

Because we cooperate with world-leading manufacturers, we are always able to document the origin of our stock, guarantee quality and guarantee its parameters.

Coroll - výhody

Emergency service 24/7

We provide our contracted customers with a 24/7 delivery service.

That's not all...

There are so many reasons to start a partnership with us.
Take a look
Coroll represents the largest manufacturers