Split Plummer Block Housings SNS

Longer bearing life Plummer block housings SNS represent a completely new generation of large size housings. Through the systematic further development of the proven FAG plummer block housings, Schaeffler can offer even greater efficiency and cost-effectiveness for machinery and plant. The unique housing design gives an increase in the life of the spherical roller bearings fitted in the housing of up to 50%. This is achieved through optimised load distribution in the bearing that occurs due to the interaction of the bearing and housing geometry under load. The most important advantages of the...

Contents Page Product overview Design and safety guidelines Ordering examples Dimension tables Schaeffler Technologies

Product overview Plummer block housings Split plummer block housings SNS Covers Locating rings Labyrinth seals Taconite seals Schaeffler Technologies

Split plummer block housings SNS Split FAG plummer block housings SNS and the associated bearings form bearing arrangement units that can be matched, through the specific selection of seal design, lubrication type and bearing mounting, to a wide range of requirements. The housings are specifically designed for the fitting of spherical roller bearings. Modular concept The housings are designed in accordance with a modular concept. Each housing can be fitted with spherical roller bearings of various diameter and width series. Depending on their design, the bearings can be located either directly...

Split plummer block housings SNS Plummer block housings SNS for split spherical roller bearings Plummer block housing Locating and non-locating bearings The bearing seats in the housing are machined such that the bearings are movable and can thus function as non-locating bearings. Locating bearing arrangements can be achieved by the insertion of locating rings NFR on both sides of the bearing outer ring. Locating rings must be ordered separately. Housing material and outer surfaces Plummer block housings SNS are available for shaft diameters from 115 mm to 530 mm and from 47/16 inch to 191/2...

In the case of FAG plummer block housings SNS, the life of the spherical roller bearings fitted is up to 50% higher than in the case of conventional plummer block housings. The increase in life is dependent on the application, the load and the bearing design. Calculation of the bearing life is based on the calculation software BEARINX®. The reason for the longer bearing life is the optimum load distribution in the bearing that is achieved as a result of the new housing design, Figure 1. Conventional plummer block housings are designed such that the bearing load is introduced into the housing...

Split plummer block housings SNS Advantages of the detailed design A large number of details in the housing design that are systematically matched to practical application allows a particularly flexible and economical usage of plummer block housings SNS, Figure 2. ᕃ Lubrication hole with long axial lubrication groove ᕄ Pilot hole at predefined position for condition monitoring ᕅ Grease outlet holes ᕆ Indentations indicating shaft and bearing centres ᕇ Inclined run-off areas ᕈ Machined locating faces ᕉ Prepared mounting points for condition monitoring ᕊ Marking of housing halves ᕋ Dismounting...

Inclined run-off areas Inclined run-off areas on the upper and lower housing section promote the removal of fluids and reduce deposits of contamination, Figure 2, ᕇ. This leads to reduced cleaning work and a lower risk of corrosion. Machined locating faces Machined locating faces on the lower housing section allow precise alignment of the housing, Figure 2, ᕈ. Since the locating faces are raised, strips can be used as an alignment aid. One-off alignment is sufficient to allow rapid interchange of the housing when necessary. Prepared mounting points for condition monitoring In order to allow the...

Split plummer block housings SNS Possible combinations The modular structure of the plummer block housings SNS facilitates numerous possible combinations. Based on the standard components, the housing can be combined as follows: ■ location of bearings with a cylindrical bore directly on a stepped shaft or location of bearings with a tapered bore on a smooth shaft by means of an adapter sleeve ■ sealing of the housing by means of a labyrinth seal or a Taconite seal ■ with a continuous shaft or a housing closed on one side ■ design of the bearing arrangement as a locating bearing arrangement or...

ᕃ Locating bearing ᕄ Non-locating bearing Figure 5 Plummer block housing SNS for bearing with cylindrical bore (2 Taconite seals NTC) ᕃ Locating bearing ᕄ Non-locating bearing Figure 6 Plummer block housing SNS for bearing with cylindrical bore (Taconite seal NTC and cover NDK) ᕃ Locating bearing ᕄ Non-locating bearing Figure 7 Plummer block housing SNS for bearing with tapered bore and adapter sleeve (2 labyrinth seals NTS) ᕃ Locating bearing ᕄ Non-locating bearing Schaeffler Technologies Figure 8 Plummer block housing SNS for bearing with tapered bore and adapter sleeve (labyrinth seal NTS...

Split plummer block housings SNS Figure 9 Plummer block housing SNS for bearing with tapered bore and adapter sleeve (2 Taconite seals NTC) ᕃ Locating bearing ᕄ Non-locating bearing Figure 10 Plummer block housing SNS for bearing with tapered bore and adapter sleeve (Taconite seal NTC and cover NDK) Combination with products for maintenance Further information on maintenance products ᕃ Locating bearing ᕄ Non-locating bearing The housings are suitable for connection of systems for preventive maintenance such as Condition Monitoring or automatic lubricators. Schaeffler offers a wide range of such...

For sealing of the bearing housings, the standard seals available are the labyrinth seal and the Taconite seal. These seals are matched to the rectangular section annular slots on both sides of the housings. Labyrinth seals NTS give non-contact sealing. They are therefore suitable for high circumferential velocities. The round cord made from fluoro rubber FKM pressed between the labyrinth ring and shaft is suitable for temperatures up to +200 °C. The labyrinth seal allows shaft misalignment of up to 0,3° in both directions and is suitable for grease lubrication. If necessary, the labyrinth can...