UCFL212 bearing: complete specifications & equivalents
The UCFL212 is a JIS B 1559 radial bearing sized 60 x 110 x 65.1 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 | 60 mm |
| Outer diameter D | 110 mm |
| Width B | 65.1 mm |
| Seal / shield | 2RS |
| Basic dynamic load rating C | 58 kN |
| Basic static load rating C0 | 36 kN |
| Fatigue load limit Pu | 2.83 kN |
| Mass | 3800 g |
| Housing height H | 250 mm |
| Housing overall length L | 140 mm |
| Mounting bolt center distance J | 202 mm |
| Mounting hole diameter N | 23 mm |
| Manufacturer designation | UCFL212 |
| 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 | 2.362 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 2.563 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 25 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) | 12 of 25 |
| Bore above smallest UCFL-series size | 48 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| UCFL212 | 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 UCFL212 model number is decoded
In NTN's mounted-bearing range, UCFL212 is the two-bolt rhombus flange option for a 60 mm shaft: insert UC212D1, housing FL212, through-bolt mounting. The code breaks down as insert family UC, housing form FL (flange), duty series 2, bore code ending in the 60 mm shaft size; the unit is built from insert UC212D1 and housing FL212. For the frame-face drawing of UCFL212: the two holes are 202 mm apart (J), the rhombus spans 140 mm (L) and 250 mm (H), and M20 (23 mm) bolts clamp it around the 60 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. Large-bore mounted units like this are selected on calculated bearing life plus foundation quality — the cast base is now a structural part of the drive, not just a convenient clamp. Sawmill and woodworking machinery mounts this unit on saw arbors and feed rolls, where vibration is continuous and the setscrews must be re-checked after the first hours of running. After the first 24–48 running hours, re-torque both setscrews and the foundation bolts — seating of the inner ring on the shaft and crush of any paint under the feet otherwise leaves the bearing loose at the worst possible time. Basic ratings of the UC212D1 insert are 58 kN dynamic and 36 kN static; the assembled UCFL212 weighs about 3.8 kg.
Typical equipment & failure modes
Common applications
- quarry feeder and transfer drives
- sawmill arbors and feed rolls
- cement and clinker handling
- continuous one-direction running where creep risk concentrates on the setscrew points
Known failure patterns
- setscrew loosening and inner-ring fretting on a shaft that was never re-torqued after run-in
- insert brinelling from hammer mounting or from belt tension applied to a stationary unit
- over-greasing that churns the charge, overheats the bearing and blows the seal lip
Selection pitfalls — read before you substitute
- Never weld a bracket to the FL212 housing of UCFL212: local heat cracks cast iron and distorts the spherical bore that the insert depends on.
- UCFL212 at 60 mm uses M20 bolts that need a torque wrench and a cross pattern; pulling one bolt first tips the 250 mm centre height and binds the insert.
- The standard 2-series insert in UCFL212 is the lightest section at 60 mm — do not substitute it into a position that previously ran an X or 3 unit: the 202 mm mounting may match while the load rating does not.
- As a rhombus flange, UCFL212 pulls against the frame through only two M20 bolts on 202 mm centres; the mounting plate must be stiff enough not to bend between them under belt load.
Frequently asked questions
How is UCFL212 locked to the shaft, and how tight should the setscrews be?
The UC212D1 insert uses two collar setscrews on the 60 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 UCFL212 instead of a pillow block?
Choose the UCFL212 two-bolt flange when the 60 mm shaft meets a vertical frame or side plate: the diamond housing bolts flush with two M20 bolts on 202 mm centres. A UCP pillow block is used when the shaft runs above a horizontal mounting surface.
What are the dimensions of an UCFL212 mounted bearing?
UCFL212 takes a 60 mm shaft (insert UC212D1, 110 mm OD) and has a unit mass of about 3.8 kg. Flange figures: height H 250 mm, length L 140 mm, bolt centres J 202 mm, holes 23 mm for M20 bolts.
What does the UCFL212 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 60 mm bore. UCFL212 is built from housing FL212 plus insert UC212D1 (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.