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Nov . 03, 2025 15:10 Back to list

UCF209-28 outer spherical flange bearing with seat - Robust


Field Notes on a Workhorse: UCF209-28 Outer Spherical Flange Bearing With Seat

If you spend time around conveyors or agricultural kit, you already know the type: four-bolt square flange, 1-3/4" bore, built to shrug off dust and misalignment. The UCF209-28 Outer Spherical Flange Bearing With Seat is one of those dependable, almost boring (in the best way) parts that keeps plants running. Origin-wise, it comes out of No. 3, Area B, Bearing Industry Mass Entrepreneurship Park, Beihuan Road, Linxi County, Xingtai City, Hebei Province. I've walked similar plants—smell of cutting fluid, racks of housings—honestly, you can tell when a line is dialed in.

UCF209-28 outer spherical flange bearing with seat - Robust

What’s trending in mounted bearings

Three things keep popping up: better sealing (triple-lip options), smarter grease management, and traceability. End users want longer intervals and ISO-aligned test data, not just catalog promises. In fact, many customers say they’re swapping older cast housings for coated or stainless inserts in corrosive wash-down zones. However, for general duty, the classic cast iron + set-screw combo still wins on cost-performance.

UCF209-28G 1-3/4" Four Bolt Flange Bearing Specification

Bore (d)1-3/4" (≈44.45 mm)
Housing style4-bolt square flange (F209 style)
Locking methodDual set-screws on inner ring
SealsContact rubber seals; shields optional
MaterialsInsert: bearing steel (e.g., GCr15); Housing: cast iron
Dynamic load rating (Cr)≈30–35 kN (real-world use may vary)
GreaseFactory-filled EP2 lithium; re-greasable zerk
Speed limit (grease)≈3,000 rpm typical
Temperature range-20 °C to +110 °C (short peaks higher)

Process flow, testing, and life

  • Materials: vacuum-degassed GCr15 rings; HT200-class cast iron housing.
  • Methods: forging, precision heat treatment, raceway grinding, phosphate + paint on housing, automated assembly.
  • Testing: radial clearance to ISO 5753; vibration per ISO 15242; grease conformance ASTM D4950; salt-spray ≈72 h per ASTM B117 for coated housings.
  • Service life: L10 life often 20,000–40,000 h at moderate loads per ISO 281 calculations—context matters.
  • Certifications: ISO 9001; IATF 16949 available on request for automotive-adjacent lines.

Where it shines

Conveyors, agricultural implements, packaging machinery, HVAC fans, small quarry screens. I guess the secret sauce is the outer-spherical insert that tolerates a bit of misalignment during install—saves time, reduces fretting.

UCF209-28 outer spherical flange bearing with seat - Robust

Customer voices (short and sweet)

“Dropped into a grain auger with zero fuss.” “Grease interval stretched to quarterly; surprisingly quiet.” Not scientific, sure, but it tracks with our own checks.

Vendor comparison (indicative)

Vendor Lead Time Seal Options Warranty Notes
BTZ Bearing (Hebei) ≈7–15 days Contact, triple-lip optional 12 months Good balance of cost/traceability
Competitor L Stock on common sizes Multiple, including stainless shields 12–24 months Higher list price
Budget Import ≈20–30 days Basic contact only 6 months Variable QC; verify certificates

Customization

  • Insert in stainless or black-oxide coated steel.
  • Triple-lip seal for slurry/dust-heavy lines.
  • Food-grade grease (H1) and laser-etched traceability codes.

Quick case study

A Midwestern packaging plant swapped legacy units for UCF209-28 Outer Spherical Flange Bearing With Seat on a carton conveyor. Result: vibration dropped ≈18% (ISO 15242 bands), grease interval moved from monthly to quarterly, and unplanned downtime went from three incidents/quarter to zero over six months. Not a miracle—just better sealing and fit-up.

Final take

If you want a reliable, spec-driven 1-3/4" four-bolt flange that doesn’t overcomplicate your MRO shelf, the UCF209-28 Outer Spherical Flange Bearing With Seat is a sensible pick. Price-conscious, test-backed, and easy to fit—exactly what most lines need.

Authoritative citations

  1. ISO 281: Rolling bearings — Dynamic load ratings and rating life.
  2. ISO 15242: Rolling bearings — Measuring methods for vibration.
  3. ASTM B117: Standard Practice for Operating Salt Spray (Fog) Apparatus.
  4. ISO 5753: Rolling bearings — Internal clearance.
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