SY20TF SKF 2 Bolt Plummer Block Y Bearing with Grub Screws 20mm

The SKF SY20TF is a premium-quality pillow block ball bearing unit manufactured to ISO standards and designed for reliable performance in material handling, agricultural, manufacturing, and general industrial applications. Supplied as a complete ready-to-mount assembly, the unit combines the SKF YAR 204-2F insert bearing with the robust SY 504 M cast iron housing, providing a durable and cost-effective shaft support solution.

Featuring a 20mm bore diameter and an extended inner ring design, the bearing is secured to the shaft using dual M6 x 0.75 set screws, allowing fast installation and dependable shaft retention. The unit is suitable for applications operating with both constant and alternating directions of rotation.

The bearing insert is factory lubricated and fitted with contact seals and protective flingers on both sides to help prevent the ingress of dust, dirt, and moisture while retaining lubricant within the bearing. A grease fitting and relubrication facility are included as standard, allowing routine maintenance to maximise service life and operational reliability.

Manufactured with a high-strength cast iron housing and bearing steel insert, the SY20TF accommodates minor shaft misalignment through its spherical seating arrangement while delivering excellent load carrying capability and vibration resistance.

Features & Benefits

• Complete ready-to-fit pillow block bearing unit
• 20mm shaft diameter capacity
• Cast iron housing for strength and durability
• SKF YAR 204-2F insert bearing included
• Extended inner ring with set screw locking arrangement
• Suitable for constant and reversing shaft rotation
• Factory lubricated for immediate installation
• Contact seals with additional flingers on both sides
• Relubrication facility with grease nipple fitted
• Self-aligning spherical seating design
• Optional end cover available (ECY 204)
• Designed to ISO standards
• Ideal for material handling and general industrial applications

Technical Specifications

Bearing Unit Design

• Manufacturer: SKF
• Part Number: SY20TF
• Housing Type: Pillow Block
• Housing Reference: SY 504 M
• Bearing Reference: YAR 204-2F
• Standard: ISO
• Bore Type: Cylindrical
• Inner Ring Retention: Set Screws
• Housing Material: Cast Iron
• Bearing Material: Bearing Steel
• Coating: None
• Rubber Seating Ring: No

Dimensions

• Shaft Diameter (d): 20mm
• Inner Ring Shoulder Diameter (d1): 28.2mm
• Base Width (A): 32mm
• Top Width (A1): 21mm
• End Cover Projection (A5): 20.5mm
• Inner Ring Width (B): 31mm
• Distance to Thread Centre (B4): 4.5mm
• Centre Height (H): 33.3mm
• Foot Height (H1): 14mm
• Overall Height (H2): 64.5mm
• Bolt Hole Centres (J): 97mm
• Maximum Bolt Centre Distance (Jmax): 106mm
• Minimum Bolt Centre Distance (Jmin): 88mm
• Overall Length (L): 127mm
• Bolt Hole Diameter (N): 11.5mm
• Bolt Slot Length (N1): 20.5mm
• Raceway Centre Distance (s1): 18.3mm

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 204

Performance Data

• Basic Dynamic Load Rating (C): 12.7 kN
• Basic Static Load Rating (C₀): 6.55 kN
• Fatigue Load Limit (Pu): 0.28 kN
• Limiting Speed: 8,500 rpm
• Limiting Speed Based On: h6 Shaft Tolerance

Mounting Information

• Set Screw Size: M6 x 0.75
• Hex Key Size: 3mm
• Recommended Set Screw Tightening Torque: 4 Nm
• Recommended Attachment Bolt Diameter: 10mm (3/8")

Additional Data

• Number of Mounting Holes: 2
• Mounting Hole Type: Plain
• Unit Weight: Approximately 0.56kg
• eClass Code: 23-05-08-02
• UNSPSC Code: 31171536

Typical Applications

The SKF SY20TF is commonly used in conveyor systems, packaging machinery, agricultural equipment, material handling systems, food processing machinery, production lines, textile equipment, and light-to-medium duty industrial machinery where reliable shaft support and simplified maintenance are required.

Designed to SKF's renowned quality standards, the SY20TF delivers dependable performance, straightforward installation, excellent sealing protection, and long operating life in demanding industrial environments.