What material is this bearing housing made of?

The housing is made of sturdy cast iron, suitable for industrial applications.

What is the shape and design of the FNL 509 B?

It is a non-split flanged housing featuring a triangular 3-bolt flange.

What is the bearing seat diameter?

The housing has a seat diameter of 85 mm.

What does the suffix B indicate?

The suffix B denotes a housing configuration designed for through shafts.

When should you use this flanged housing?

You use it to provide reliable shaft support on vertical walls without horizontal frames.

SKF FNL 509 B undivided bearing housing with flange, FNL cast 85 x 12 mm

Supplier number: SKF FNL 509 B | EAN 7316572868676

Recommended Retail Price €559.07

276.60 tax incl.

€228.60 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 2 products in stock.

Ordered before 20:00 - delivered tomorrow 10/10/2026
Free shipping
Delivery by DHL

↓ Documents (1) ✆ Talk to a specialist

Dependable shaft support with FNL 509 B

Practical benefits

Sturdy cast iron housing: The non-split grey cast iron body provides exceptional rigidity, protecting your bearings against heavy mechanical stress.
Designed for through shafts: The B-suffix design accommodates continuous shafts seamlessly while keeping lubrication secured inside the housing.
Practical triangular flange mounting: You can easily and securely mount the three-bolt flange onto equipment lacking a horizontal frame structure.

In a nutshell

The right choise for

With the Skf fnl 509 b flanged housing, you can mount rotating shafts securely and precisely on machinery that lacks a horizontal frame. Crafted from robust cast iron, this non-split housing features an 85 mm bearing seat diameter, delivering exceptional rigidity under demanding mechanical loads. The triangular three-bolt flange design allows for fast, stable installation onto vertical machine walls or conveyor systems. Designed specifically for through-shaft configurations, the B-suffix execution keeps lubrication contained while effectively protecting your assembly against dirt and contaminants.

Product information FAQ

€276.60

In stock - tax incl.

Key features according to our expert

Seat diameter: 85 mm
Material (bearing housing): Cast iron
Shape (bearing housing): Triangle

Product description

FNL cast flanged, non-split housings are well-proven machine parts that provide simple and reliable housing in applications without horizontal frames. They enable the full service life potential of the incorporated bearings to be exploited with less need for maintenance. FNL housings are supplied with a cover either for shaft ends (suffix A) or for through shafts (suffix B). Smaller sizes (up to and including size 13) have a triangular flange, larger sizes have a square flange.

Well-proven
Less need for maintenance

Documents

⤓ Technical data sheet PDF

All Features

Seat diameter: 85 mm
Material (bearing housing): Cast iron
Shape (bearing housing): Triangle
Attachment bolt diameter: 12
Material, housing: Cast iron
Diameter of bearing seat: 85
Housing type: Flanged
Housing configuration: One-piece
Number of bolt holes for fasteners: 3
Pitch diameter of bolt holes of round and triangle flange type housing: 160
Fastening bolt hole type: Cast holes
Mounting arrangement: Through shaft
Housing lubrication feature/possibility: Grease
Bearing housing seal type: Lip seal

Brand SKF
01231059
EAN 7316572868676
Supplier number SKF FNL 509 B

Frequently asked questions about this product

Answered by specialists

What material is this bearing housing made of?: The housing is made of sturdy cast iron, suitable for industrial applications.
What is the shape and design of the FNL 509 B?: It is a non-split flanged housing featuring a triangular 3-bolt flange.
What is the bearing seat diameter?: The housing has a seat diameter of 85 mm.
What does the suffix B indicate?: The suffix B denotes a housing configuration designed for through shafts.
When should you use this flanged housing?: You use it to provide reliable shaft support on vertical walls without horizontal frames.