SY55TF SKF 2 Bolt Plummer Block Y Bearing with Grub Screws 55mm

The SKF SY55TF is a heavy-duty pillow block ball bearing unit engineered to provide reliable shaft support in demanding industrial, agricultural, processing, and material handling applications. Supplied as a complete ready-to-install assembly, the unit combines the SKF YAR 211-2F insert bearing with the robust SY 511 M cast iron housing, delivering exceptional load carrying capability, effective sealing performance, and long service life.

Designed for 55mm shaft diameters, the SY55TF features an extended inner ring with dual set screw locking, ensuring secure shaft retention in applications subjected to vibration, shock loads, and varying operating conditions. Suitable for both continuous and reversing shaft rotation, this bearing unit offers a dependable and versatile mounting solution across a wide range of industrial machinery.

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 contaminants such as dust, dirt, and moisture. A relubrication facility with grease nipple is supplied as standard, enabling routine maintenance and helping maximise bearing performance and service life.

Manufactured from premium-grade bearing steel and housed within a rugged cast iron pillow block housing, the SY55TF incorporates SKF's proven self-aligning design, allowing 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 55mm shaft diameters
• Heavy-duty cast iron housing construction
• SKF YAR 211-2F 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 211)
• Excellent resistance to contamination, vibration and shock loads

Technical Specifications

Bearing Unit Design

• Manufacturer: SKF
• Part Number: SY55TF
• Housing Type: Pillow Block Bearing Unit
• Housing Reference: SY 511 M
• Bearing Reference: YAR 211-2F
• 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): 55mm
• Inner Ring Shoulder Diameter (d1): 69.8mm
• Base Width (A): 58mm
• Top Width (A1): 36mm
• End Cover Projection (A5): 43.5mm
• Inner Ring Width (B): 60.3mm
• Distance to Thread Centre (B4): 8.5mm
• Centre Height (H): 71.4mm
• Foot Height (H1): 27mm
• Overall Height (H2): 138mm
• Bolt Hole Centres (J): 171mm
• Maximum Bolt Centre Distance (Jmax): 185mm
• Minimum Bolt Centre Distance (Jmin): 157mm
• Overall Length (L): 219mm
• Bolt Hole Diameter (N): 20mm
• Bolt Slot Length (N1): 33mm
• Raceway Centre Distance (s1): 36.5mm

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 211

Performance Data

• Basic Dynamic Load Rating (C): 43.6 kN
• Basic Static Load Rating (C₀): 29.0 kN
• Fatigue Load Limit (Pu): 1.22 kN
• Limiting Speed: 3,800 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: 16mm (5/8")

Additional Data

• Number of Mounting Holes: 2
• Mounting Hole Type: Plain
• Unit Weight: Approximately 3.6kg
• eClass Code: 23-05-08-02
• UNSPSC Code: 31171536

Typical Applications

The SKF SY55TF pillow block bearing unit is widely used in conveyor systems, agricultural machinery, recycling equipment, quarrying machinery, timber processing plants, food processing equipment, bulk material handling systems, manufacturing machinery, packaging lines, and general industrial applications requiring robust shaft support and dependable long-term performance.

Manufactured to SKF's renowned engineering standards, the SY55TF delivers outstanding load carrying capability, effective contamination protection, straightforward installation, and extended operational reliability, making it an ideal choice for demanding industrial environments where durability, performance, and reduced maintenance requirements are essential.