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SKF FNL units are flanged housings that bolt to a wall or plate on the machine, with the shaft at right angles to that surface. They fit places with no horizontal base for a pillow block, such as a conveyor end or the side of a frame. Like split pillow block housings, they take tapered bore bearings mounted on an adapter sleeve.
View all SKF bearing housings part numbers →SKF buyer's guide →FNL flanged housings, all brands →SKF mounted units with insert bearings →SKF bearing housing covers and accessories →
In FNL 505 A, the letters are the series and the number is the size, which relates to the bearing and sleeve the housing takes. The final letter sets the version: FNL 505 A and FNL 505 B share a size and differ in how the shaft side is closed. FNL 509 A is the first version in a larger size.
As with other housings, the code covers the housing only. The bearing, the sleeve with its nut and washer, and the locating rings each have their own designation, so ordering a complete assembly means listing every part.
A flanged housing transfers load to the wall through its bolts and spigot. The surface has to be flat and square to the shaft. On a warped plate the housing sits at an angle and the bearing runs under strain, self-aligning or not. Check the plate stiffness as well, since thin sheet metal vibrates and works the bolts loose.
Before you replace one, measure the bolt circle, the number and diameter of the holes and the spigot diameter. Note whether the shaft runs through the housing or ends inside it, since that decides the version and the seal.
Send the full designation, final letter included, and the quantity. Add the bearing and sleeve designations and the actual shaft diameter. Tell us whether the shaft runs through or ends inside, what the mounting surface is like and what the environment is. If the code is unreadable, the flange dimensions and a photo from the front are enough for us to identify it.
Same size, different version. Pick the one that matches how the shaft ends.
No. The bearing, sleeve and rings are ordered on their own designations.
Only if the machine offers a flat, stiff wall square to the shaft to bolt it to.
Can't find the exact model? Tell us the part number or model you need. We'll track it down and quote it, whether or not it appears in our catalog.
The SKF FNL housing is a mounting component that holds and secures a bearing inside industrial machinery. It provides the support and alignment the bearing needs, while simplifying installation and routine maintenance.
Example part numbers:FNL 505 AFNL 506 AFNL 507 AFNL 508 AFNL 509 A
The FNL is a cast housing that holds and locates a bearing, built in a split design so it can be assembled and serviced more easily. You will find it on equipment that needs firm support and accurate alignment, including conveyors, mills, pumps and fans. MR Industrial Accessories LLC supplies the SKF line to customers throughout the United States and in several Latin American countries.
Example part numbers:FNL 505 BFNL 506 BFNL 507 BFNL 508 BFNL 509 B
The manufacturer part number is all we need: we'll quote it and share dimensions and equivalents via WhatsApp or email.
