UCFL207 bearing: complete specifications & equivalents
The UCFL207 is a JIS B 1559 radial bearing sized 35 x 72 x 42.9 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 | 35 mm |
| Outer diameter D | 72 mm |
| Width B | 42.9 mm |
| Seal / shield | 2RS |
| Basic dynamic load rating C | 28.4 kN |
| Basic static load rating C0 | 15.3 kN |
| Fatigue load limit Pu | 1.09 kN |
| Mass | 1200 g |
| Housing height H | 161 mm |
| Housing overall length L | 90 mm |
| Mounting bolt center distance J | 130 mm |
| Mounting hole diameter N | 16 mm |
| Manufacturer designation | UCFL207 |
| 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 | 1.378 in |
|---|---|
| Outer diameter D | 2.835 in |
| Width B | 1.689 in |
| ISO bore code | 07 |
| Radial section height (D−d)/2 | 18.5 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) | 7 of 25 |
| Bore above smallest UCFL-series size | 23 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| UCFL207 | 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 UCFL207 model number is decoded
UCFL207 is an NTN two-bolt rhombus flanged unit — a setscrew-locking UC207D1 ball bearing insert pre-assembled in a FL207 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 35 mm bore. Key mounting figures: flange height H = 161 mm, overall length L = 90 mm across the diamond, bolt centres J = 130 mm, and each ear takes a 16 mm (M14) fastener for the 35 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. Most general industrial shafting in the 25–50 mm range ends up on exactly this class of unit: designers trade the 2, X and 3 sections against conveyor centres and belt tension rather than against absolute capacity. 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 UC207D1 insert are 28.4 kN dynamic and 15.3 kN static; the assembled UCFL207 weighs about 1.2 kg.
Typical equipment & failure modes
Common applications
- belt conveyor head, tail and bend pulleys
- industrial fans and blowers
- agricultural augers and bucket elevators
- low-speed heavily loaded pulleys where the static rating governs the selection
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
- The standard 2-series insert in UCFL207 is the lightest section at 35 mm — do not substitute it into a position that previously ran an X or 3 unit: the 130 mm mounting may match while the load rating does not.
- As a rhombus flange, UCFL207 pulls against the frame through only two M14 bolts on 130 mm centres; the mounting plate must be stiff enough not to bend between them under belt load.
- When ordering covers for UCFL207, note the steel and cast-iron cover executions change the unit mass and envelope but not the 130 mm mounting centres.
- With a 35 mm shaft the M14 foundation bolts of UCFL207 must be re-checked after run-in — paint crush under the feet is enough to loosen both the feet and the setscrews.
Frequently asked questions
What are the dimensions of an UCFL207 mounted bearing?
UCFL207 takes a 35 mm shaft (insert UC207D1, 72 mm OD) and has a unit mass of about 1.2 kg. Flange figures: height H 161 mm, length L 90 mm, bolt centres J 130 mm, holes 16 mm for M14 bolts.
What does the UCFL207 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 35 mm bore. UCFL207 is built from housing FL207 plus insert UC207D1 (D1 = greasable).
How is UCFL207 locked to the shaft, and how tight should the setscrews be?
The UC207D1 insert uses two collar setscrews on the 35 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 UCFL207 instead of a pillow block?
Choose the UCFL207 two-bolt flange when the 35 mm shaft meets a vertical frame or side plate: the diamond housing bolts flush with two M14 bolts on 130 mm centres. A UCP pillow block is used when the shaft runs above a horizontal mounting surface.
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.