Protection for your BearingsFKL Housing and Sleeves

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FKL Housing & Plummer Block

For applications where the bearings cannot be directly fitted inside the machine or equipment, separate bearing housings are needed.

Plummer blocks are the most commonly used types of bearing housings – designed for predominantly vertical loads directed towards the base. Usually made of cast iron, these are designed for use with self-aligning ball bearings and spherical roller bearings – either mounted or adapter sleeves or having cylindrical bores.

Plummer blocks of series SN 5 and SN 6 are designed for grease lubricated bearings. SN housings are fitted with felt seals. Their dimensions conform to ISO/R113 and BS 1642: 1969.

Plummer blocks of series SNG are the latest development over the SN Plummer blocks, and have been designed to meet quite demanding requirements. The dimensions of SNG series housings are same as SN / SNA / SNH / SNL housings and are fully interchangeable with them dimensionally. However there are certain features in SNG series of Plummer blocks which set them miles apart from the other series.

Plummer blocks of series SNG are suitable for both grease and oil lubrication. The Plummer block design permits easy machining of drilled passages for circulating oil lubrication. Each SNG series Plummer block has in – built dimples on it's surface for easy location of:

Oil / grease nipples

Installation of vibration / temperature sensors

Drainage outlets

Locating dowel pins

Made of FG 210 grade cast iron, and fully stress – relieved, SNG housings are made from machine moulded castings machined in precision CNC machines to exacating parameters.Plummer blocks of SD series are designed for spherical roller bearings of larger sizes – 170 mm bore and above. They are equipped wit two labyrinth sealing collars having a push fit on the shaft. A rubber O ring is fitted between the collar and the shaft to ensure that they rotate together.

In Plummer blocks of SD series, special bosses are provided on the lower half of the housing to allow easy modification for oil lubrication. The bosses can be drilled and tapped to take on oil level gauges and drain plugs. An oil circulation system can also be incorporated in SD series Plummer blocks. The housing can carry very heavy loads and are designed for heavy duty applications.

SN, SD, SAF, SOFN & SNG series of HousingsOur range covers

Higher strength:

Choice of Seals:

Choice of Lubrication:

Equipped with high tensile bolts, special outer design and bottom center rib, the strength of the SNG housings is approximately 50% -100% greater than that of SN housings, although the weight is the same.

Plummer blocks of series SNG have a choice of seals – not only guide ring mounted felt seals, but V rings or double – lip oil seals can also be chosen for SNG housings.

SNG-The best solution to enhance bearing life and productivity and reduce inventory carrying cost.

Eight loca�on selec�onsfor drainage

Reinforced base for heavy load

Dimples provided forLoca�ng pins if equired

Variousoil/grease loca�ons

Gaps provided to helpsplit the housings

Cross center lines for easyalignment in assembly

Various sensor/monitorinstalling loca�ons

Fully interchangeable with SNA,SNH,SNL & SNU Housings without compromising the load carrying capacity.

Adapter and Withdrawl Sleeves

Usually a roller bearing having a tapered bore is mounted on a straight shaft using either an Adapter Sleeve assembly, or a Withdrawal Sleeve. Mounting a bearing on a sleeve also permits maximum flexibility in the axial positioning of the bearing on the shaft and can accommodate light locational thrust loads.

An Adapter or a Withdrawal Sleeve mounted bearing requires the correct reduction of Radial Internal Clearance of the bearing so as to prevent relative motion amongst the bearing inner ring, the sleeve and the shaft. Non-compliance with proper mounting procedures will invariably lead to hot running of the bearing and subsequently to it's premature failure.

Both the Adapter and the Withdrawal Sleeves have cylindrical bore and tapered outer surface, with threading on one side of the outer surface, and are slit along the length. While the Adapter Sleeve has the threading on the small diameter side of the taper, the Withdrawal Sleeve has the threading on the larger diameter side. Thus, the Adapter Sleeve facilitates easy mounting of the bearing, while the Withdrawal Sleeve is normally used to ensure easy dismounting of the bearing, hence it's name.

An Adapter Sleeve assembly consists of the Sleeve, a Lock Nut and a Lock Washer, because the Lock Nut is needed first to drive the bearing up the tapered sleeve, and then to lock it in position with the help of the Lock Nut. A Withdrawal Sleeve, on the other hand, does not necessarily need the Lock Nut and the Lock Washer for it's assembly with the bearing and the shaft, and hence is supplied without them. However, a Withdrawal Nut may required to remove the Withdrawal Sleeve from the bearing, and in that case, it has to be ordered separately.

The life of a bearing not only depends on the quality of the bearing, but on several other factors as well, which are equally important, such as :

a) Machining Accuracy: For the bearing to achieve life, the contact between it's bore and the Sleeve as well as that between the bore of the Sleeve and the Shaft should be between 85% to 90% of the contact surfaces. Hence the correctness of the taper and cylindricity of the bore of the sleeve as well as the concentricity and finishing along with perfect roundness, play a great role in achieving the contact area parameter.

b) Material :The Sleeves should be made from Carbon Steel as per established International Standard

Imported FKL Sleeves are manufactured from originally processed raw material (C20/C30) and machined in CNC machines to achieve the required machining accuracy and the surface finish, so that contact area is fully maintained to provide projected service life to the Bearing.

FKL Bearing Housing and Sleeve together is an ideal combination to meet and enhance service life criteria of Bearings.N.B.: Beyond all sizes of sleeve (metric & inch) hydraulic type are also available.

For any query please contact : marke�ng@�lindia om

Corporate & Registered Office

Diamond Heritage, 15th Floor,Room No:-1508, 16th Stand RoadKolkata - 700001, West Bengal

Manufacturing Plant

Paiki No. – 143, Near Divya Bhaskar PressSarkhej Bavla Highway, Chacharwadi VasnaChangodar, Matoda, Ahmedabad – 382213

Phone+91-33-22624831/32/33

Emailmarketing@fklindia.commarketing2@fklindia.com