UCFL216 bearing: complete specifications & equivalents
The UCFL216 is a JIS B 1559 radial bearing sized 80 x 140 x 82.6 mm (bore x OD x width) with 2RS sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 80 mm |
| Outer diameter D | 140 mm |
| Width B | 82.6 mm |
| Seal / shield | 2RS |
| Basic dynamic load rating C | 80.5 kN |
| Basic static load rating C0 | 53 kN |
| Fatigue load limit Pu | 3.95 kN |
| Mass | 7400 g |
| Housing height H | 290 mm |
| Housing overall length L | 180 mm |
| Mounting bolt center distance J | 233 mm |
| Mounting hole diameter N | 25 mm |
| Manufacturer designation | UCFL216 |
| Standard | JIS B 1559 |
| Catalog version | CAT. No. 2203-3/E 2024 |
| Last verified | 2026-09-25 |
Source: catalog reference (CAT. No. 2203-3/E 2024) · extracted 2026-09-25
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (CAT. No. 2203-3/E 2024); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.com.
Dimensions in inches & UCFL-series range
| Bore d | 3.15 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 3.252 in |
| ISO bore code | 16 |
| Radial section height (D−d)/2 | 30 mm |
| Smallest bore in UCFL-series | 12 mm |
| Largest outer diameter in UCFL-series | 300 mm |
| Width range across UCFL-series | 31–145 mm |
| Bore position in UCFL-series (smallest first) | 16 of 25 |
| Bore above smallest UCFL-series size | 68 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| UCFL216 | ISO 15 | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range. Brand-specific OEM equivalents pending multi-source data. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the UCFL216 model number is decoded
UCFL216 is an NTN two-bolt rhombus flanged unit — a setscrew-locking UC216D1 ball bearing insert pre-assembled in a FL216 cast-iron flange housing. Reading the designation: UC marks the wide-inner-ring, setscrew-locking insert; FL marks the two-bolt rhombus flange housing; the 2 code identifies the duty series and the final two digits encode the 80 mm bore. Key mounting figures: flange height H = 290 mm, overall length L = 180 mm across the diamond, bolt centres J = 233 mm, and each ear takes a 25 mm (M22) fastener for the 80 mm shaft. The 2-series section is the standard-duty choice — the slimmest, lightest housing at this bore, selected when shaft speed and load are moderate and space is normal. The diamond flange carries the shaft square to a vertical face — a welded frame, side plate or gearbox wall — so no base plinth and no shim pack under the bearing are required. In this bore band the X and 3 sections start to outsell the standard section: longer bearing centres and tensioned belt drives use the extra rating and stiffer base that the heavier housings provide. Agricultural machinery — augers, stirrers, bucket elevators — uses this unit in the open, where the contact seals and slinger are the only barrier between the grease and chaff, dust and spray wash. The self-aligning capacity corrects only static misalignment of a few degrees; it does not forgive a bending shaft, which continuously pumps the outer ring and frets the spherical seat. Basic ratings of the UC216D1 insert are 80.5 kN dynamic and 53 kN static; the assembled UCFL216 weighs about 7.4 kg.
Typical equipment & failure modes
Common applications
- heavy bulk-handling conveyors
- process fans and induced-draft drives
- quarry feeder and transfer drives
- wet, abrasive or chemically aggressive environments relying on the lip seals and slingers
Known failure patterns
- spherical-seat fretting that welds insert to housing and destroys the self-aligning action
- water-emulsified grease after washdown with the fitting facing upward
- setscrew loosening and inner-ring fretting on a shaft that was never re-torqued after run-in
Selection pitfalls — read before you substitute
- UCFL216 is located on the shaft by setscrews only; for shock reversing drives consider an adapter-lock insert family instead, since setscrew points indent the 80 mm journal over time.
- Heavy drives on UCFL216 should have the setscrews re-torqued after the first day; at 80 mm bore the seating forces are large and a loose inner ring frets the shaft in weeks.
- The standard 2-series insert in UCFL216 is the lightest section at 80 mm — do not substitute it into a position that previously ran an X or 3 unit: the 233 mm mounting may match while the load rating does not.
- As a rhombus flange, UCFL216 pulls against the frame through only two M22 bolts on 233 mm centres; the mounting plate must be stiff enough not to bend between them under belt load.
Frequently asked questions
How is UCFL216 locked to the shaft, and how tight should the setscrews be?
The UC216D1 insert uses two collar setscrews on the 80 mm shaft. Tighten them to NTN's torque table for this bore size in sequence — half torque on the first, full on the second, then back to the first — and re-torque after the first 24–48 running hours once the collar has seated.
When should I choose a rhombus flange unit like UCFL216 instead of a pillow block?
Choose the UCFL216 two-bolt flange when the 80 mm shaft meets a vertical frame or side plate: the diamond housing bolts flush with two M22 bolts on 233 mm centres. A UCP pillow block is used when the shaft runs above a horizontal mounting surface.
What are the dimensions of an UCFL216 mounted bearing?
UCFL216 takes a 80 mm shaft (insert UC216D1, 140 mm OD) and has a unit mass of about 7.4 kg. Flange figures: height H 290 mm, length L 180 mm, bolt centres J 233 mm, holes 25 mm for M22 bolts.
What does the UCFL216 designation mean?
UC identifies the wide-inner-ring, setscrew-locking ball bearing insert; FL the two-bolt rhombus flange housing; 2 is the duty series; the last digits encode the 80 mm bore. UCFL216 is built from housing FL216 plus insert UC216D1 (D1 = greasable).
Reviewed & verified by the MPN Base engineering desk against source catalog CAT. No. 2203-3/E 2024 on 2026-09-25. Read our editorial & correction policy.