

SKF metric pillow block ball bearing units for a 20 mm shaft diameter are standard light-duty industrial units designed for high rotational speeds, excellent self-alignment, and low friction. Common ISO and JIS metric designations for this size include the SKF Y-Bearing Plummer Block Unit (SY 20 TF / SYJ 20 TF) and the SKF UCP204 Pillow Block Bearings (UCP 204). Key Technical Specifications for 20 mm Metric Units Specification Parameter Technical Value / Detail Bore / Shaft Diameter (d) 20 mm Centre Height (H) 33.3 mm Total Height (H_2) 64.5 mm Overall Length (L) 127 mm Mounting Hole Spacing (J) 95 mm Housing Foot Width (A) 32 mm Housing Material Grey Cast Iron (e.g., SYJ 504 / P204 housing series) Shaft Attachment Method Set screws (grub screws) on extended inner ring Insert Bearing Ref. YAR 204-2F (or equivalent 204 insert) Basic Dynamic Load Rating (C) 12.7 kN Basic Static Load Rating (C_0) 6.55 kN Limiting Speed ~8,500 r/min Sealing System Contact seals with metallic flingers on both sides













