SKF FY 40 TF 40 mm Square Flanged Bearing Unit

SKF FY 40 TF is a complete square flanged insert bearing unit for a 40 mm shaft. It combines a robust flanged housing with an SKF YAR 208-2F series insert bearing, secured directly to the shaft by grub/set screws. SKF classifies the FY series as square flanged bearing units and the TF execution as a unit fitted with a YAR 2-2F series insert.

Technical Specifications

Manufacturer: SKF
Designation: FY 40 TF
Product type: Flanged insert bearing unit
Housing type: Square flange
Shaft diameter d: 40 mm
Insert bearing: YAR 208-2F series
Bore: Cylindrical
Shaft locking: Grub/set screws
Rolling elements: Balls
Sealing: 2F, contact sealing with flingers
Relubrication: Yes
Number of mounting holes: 4
Fixing dimension J: 101.5 mm
Overall housing dimension L: 130 mm
Mounting hole diameter N: 14 mm
Overall unit width T: 54.2 mm

SKF FY 40 TF Catalogue Dimensions

SKF catalogue data specifies:

d: 40 mm
A1: 38.5 mm
A2: 14 mm
B: 49.2 mm
Da: 115.9 mm
J: 101.5 mm
L: 130 mm
N: 14 mm
G: 12 mm
s1: 30.2 mm
T: 54.2 mm

The 101.5 mm fixing dimension and 130 mm overall flange size are particularly important when checking interchangeability with an existing bearing unit.

Catalogue Load Ratings

For SKF FY 40 TF:

Basic dynamic load rating C: 30.7 kN
Basic static load rating C0: 19.0 kN
Fatigue load limit Pu: 0.8 kN
Limiting speed with h6 shaft tolerance: 4,800 r/min

What Does FY 40 TF Mean?

SKF's designation system identifies the principal characteristics:

FY - square flanged housing
40 - 40 mm metric shaft diameter
TF - Y-bearing / insert bearing from the YAR 2-2F series with grub-screw locking.

This designation is important when distinguishing FY 40 TF from round, oval or pillow block bearing units.

YAR 208-2F Insert Bearing

The FY 40 TF uses the YAR 208-2F size insert bearing.

The insert has an extended inner ring and is secured directly to the 40 mm cylindrical shaft by set screws. This provides a straightforward shaft-locking arrangement without requiring an adapter sleeve.

The spherical outside surface of the insert works with the corresponding housing seat, enabling the unit to accommodate limited initial misalignment.

2F Sealing System

The 2F execution uses contact seals with additional flingers.

This arrangement helps retain grease within the bearing and provides additional protection against contaminants entering the rolling contact area. SKF's agricultural catalogue identifies FY 40 TF with 1-lip 2F sealing.

FY 40 TF vs FYC 40 TF

These two SKF units are not the same housing design.

FY 40 TF: square four-bolt flange unit, 40 mm shaft, 101.5 mm fixing dimension.

FYC 40 TF: round flange unit, 40 mm shaft, 120 mm pitch circle diameter.

Both use the TF insert-bearing concept, but their housing geometry and mounting dimensions differ.

Operational Advantages

• Complete ready-to-mount bearing unit
• 40 mm cylindrical shaft mounting
• Direct set-screw locking
• Self-aligning insert bearing
• Four-bolt square flange mounting
• Relubricatable design

Typical Applications

SKF FY 40 TF is suitable for appropriately designed conveyors, agricultural machinery, production equipment, material handling systems, industrial drives and general machinery.

Bearing selection should account for actual radial and axial loads, shaft speed, temperature, contamination, lubrication and shaft tolerance.

How to Select an SKF FY 40 TF Replacement

Verify:

Designation: FY 40 TF
Shaft diameter: 40 mm
Housing: Square flange
Insert: YAR 208-2F series
Locking: Set screws
Fixing dimension: 101.5 mm
Overall housing size: 130 mm
Mounting holes: 14 mm
Overall width: 54.2 mm
Dynamic rating: 30.7 kN
Static rating: 19.0 kN

FAQ - Technical Questions

What shaft diameter is SKF FY 40 TF designed for?
It is designed for a 40 mm shaft.

What type of bearing unit is FY 40 TF?
It is a square flanged insert bearing unit.

How is the bearing secured to the shaft?
The TF execution uses a YAR 2-2F series insert with grub/set-screw locking.

What is the mounting dimension?
The fixing dimension J is 101.5 mm, while the overall housing dimension L is 130 mm.

What is the dynamic load rating?
The basic dynamic load rating C is 30.7 kN.

What is the static load rating?
The basic static load rating C0 is 19.0 kN.

What is the limiting speed?
SKF specifies 4,800 r/min with an h6 shaft tolerance.