SY45TF SKF 2 Bolt Plummer Block Y Bearing with Grub Screws 45mm

The SKF SY45TF is a robust pillow block ball bearing unit engineered to provide reliable shaft support in demanding industrial, agricultural, manufacturing, and material handling applications. Supplied as a complete ready-to-install assembly, the unit combines the SKF YAR 209-2F insert bearing with the durable SY 509 M cast iron housing, delivering high load capacity, excellent sealing performance, and long service life.

Designed for 45mm shaft diameters, the SY45TF features an extended inner ring with a dual set screw locking arrangement, ensuring secure shaft retention even in applications exposed to vibration, shock loads, and fluctuating operating conditions. Suitable for both continuous and reversing shaft rotation, this bearing unit offers a dependable mounting solution for a wide variety of machinery and equipment.

The bearing insert is factory lubricated and protected by contact seals and steel flingers on both sides, helping to retain lubricant while preventing the ingress of dust, dirt, and moisture. A relubrication facility with grease nipple is included as standard, allowing routine maintenance and helping maximise bearing service life.

Manufactured from premium bearing steel and housed within a rugged cast iron pillow block, the SY45TF incorporates SKF's proven self-aligning design, enabling the unit to accommodate minor shaft misalignment and mounting inaccuracies while maintaining smooth and efficient operation.

Features & Benefits

• Complete ready-to-mount pillow block bearing unit
• Designed for 45mm shaft diameters
• Heavy-duty cast iron housing construction
• SKF YAR 209-2F insert bearing included
• Extended inner ring with dual set screw locking
• Suitable for constant and reversing shaft rotation
• Factory lubricated for immediate installation
• Contact seals and flingers fitted on both sides
• Relubrication facility with grease nipple supplied
• Self-aligning spherical seating arrangement
• Accommodates minor shaft misalignment
• Designed to ISO standards
• Optional end cover available (ECY 209)
• Excellent resistance to contamination, vibration and shock loads

Technical Specifications

Bearing Unit Design

• Manufacturer: SKF
• Part Number: SY45TF
• Housing Type: Pillow Block Bearing Unit
• Housing Reference: SY 509 M
• Bearing Reference: YAR 209-2F
• Standard: ISO
• Bore Type: Cylindrical
• Shaft Locking Method: Set Screws
• Housing Material: Cast Iron
• Bearing Material: Bearing Steel
• Coating: None
• Rubber Seating Ring: No

Dimensions

• Shaft Diameter (d): 45mm
• Inner Ring Shoulder Diameter (d1): 60.3mm
• Base Width (A): 50mm
• Top Width (A1): 31mm
• End Cover Projection (A5): 37.5mm
• Inner Ring Width (B): 54.0mm
• Distance to Thread Centre (B4): 7.5mm
• Centre Height (H): 60.0mm
• Foot Height (H1): 23mm
• Overall Height (H2): 116mm
• Bolt Hole Centres (J): 146mm
• Maximum Bolt Centre Distance (Jmax): 160mm
• Minimum Bolt Centre Distance (Jmin): 132mm
• Overall Length (L): 190mm
• Bolt Hole Diameter (N): 17mm
• Bolt Slot Length (N1): 30mm
• Raceway Centre Distance (s1): 31.8mm

Lubrication & Sealing

• Lubricant: Grease
• Relubrication Facility: Yes
• Grease Fitting: Included
• Grease Fitting Thread: 1/4-28 SAE-LT
• Housing Grease Port Thread: 1/4-28 UNF
• Bearing Seal Arrangement: Seal and Flinger on Both Sides
• Seal Type: Standard Contact Seal
• Optional Unit Sealing: End Cover ECY 209

Performance Data

• Basic Dynamic Load Rating (C): 32.5 kN
• Basic Static Load Rating (C₀): 20.4 kN
• Fatigue Load Limit (Pu): 0.865 kN
• Limiting Speed: 4,300 rpm
• Limiting Speed Based On: h6 Shaft Tolerance

Mounting Information

• Set Screw Size: M10 x 1
• Hex Key Size: 5mm
• Recommended Set Screw Tightening Torque: 15 Nm
• Recommended Attachment Bolt Diameter: 14mm (1/2")

Additional Data

• Number of Mounting Holes: 2
• Mounting Hole Type: Plain
• Unit Weight: Approximately 2.4kg
• eClass Code: 23-05-08-02
• UNSPSC Code: 31171536

Typical Applications

The SKF SY45TF pillow block bearing unit is commonly used in conveyor systems, agricultural machinery, food processing equipment, packaging machinery, recycling equipment, timber processing machinery, quarrying applications, material handling systems, production lines, and general industrial equipment where dependable shaft support and simplified maintenance are essential.

Manufactured to SKF's exacting engineering standards, the SY45TF delivers excellent load carrying performance, superior contamination protection, straightforward installation, and long-term reliability, making it an ideal choice for demanding industrial environments where uptime and durability are critical.