UCFL214 bearing: complete specifications & equivalents
The UCFL214 is a JIS B 1559 radial bearing sized 70 x 125 x 74.6 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 | 70 mm |
| Outer diameter D | 125 mm |
| Width B | 74.6 mm |
| Seal / shield | 2RS |
| Basic dynamic load rating C | 69 kN |
| Basic static load rating C0 | 44 kN |
| Fatigue load limit Pu | 3.45 kN |
| Mass | 5400 g |
| Housing height H | 265 mm |
| Housing overall length L | 160 mm |
| Mounting bolt center distance J | 216 mm |
| Mounting hole diameter N | 23 mm |
| Manufacturer designation | UCFL214 |
| 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 | 2.756 in |
|---|---|
| Outer diameter D | 4.921 in |
| Width B | 2.937 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 27.5 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) | 14 of 25 |
| Bore above smallest UCFL-series size | 58 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| UCFL214 | 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 UCFL214 model number is decoded
UCFL214 belongs to NTN's UCFL line of two-bolt rhombus flanged units, built on a JIS B 1558 UC214D1 insert in a JIS B 1559 FL214 housing. On the nameplate, UCFL214 decodes as a UC wide-inner-ring insert in a FL diamond flange, 2-series duty, 70 mm bore; the UC214D1 designation shows the D1 greasable execution. Boundary data for the 70 mm bore: 265 mm high flange, 160 mm long over the rhombus, 216 mm hole centres for M20 fasteners through 23 mm holes; insert OD is 125 mm. 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. At 55–90 mm bore the units carry serious conveyor, fan and crusher-feed drives; housing stiffness, foundation condition and bolt torque matter as much as the insert rating. Mining feeder and screen-feeder drives use the heaviest available section at this bore: the base must resist belt-pull reaction, and crews grout the sole rather than bolting to bare plate. For the flanged form, the mounting face must be flat within the housing’s own tolerance; a weld bead or plate step under one ear twists the housing and binds the insert even though the shaft looks centred. Basic ratings of the UC214D1 insert are 69 kN dynamic and 44 kN static; the assembled UCFL214 weighs about 5.4 kg.
Typical equipment & failure modes
Common applications
- cement and clinker handling
- sugar-mill and fertiliser plant drives
- heavy bulk-handling conveyors
- washdown-duty food and pharmaceutical areas using purge relubrication
Known failure patterns
- housing-foot cracking beside an over-torqued or under-supported foundation bolt
- grease starvation on long intervals in hot positions, with the ball set running on dried thickener
- fretting corrosion of the shaft journal under the wide inner ring after years of micro-creep
Selection pitfalls — read before you substitute
- The standard 2-series insert in UCFL214 is the lightest section at 70 mm — do not substitute it into a position that previously ran an X or 3 unit: the 216 mm mounting may match while the load rating does not.
- As a rhombus flange, UCFL214 pulls against the frame through only two M20 bolts on 216 mm centres; the mounting plate must be stiff enough not to bend between them under belt load.
- Self-aligning is not the same as free to move: the UC214D1 insert of UCFL214 pivots to correct static misalignment, but a continuously bending shaft still frets the spherical seat.
- At 70 mm bore the 160 mm base of UCFL214 is a structural member: grout or machine the foundation, because a bedded-on-edges housing concentrates the full belt pull on two cast feet.
Frequently asked questions
What are the dimensions of an UCFL214 mounted bearing?
UCFL214 takes a 70 mm shaft (insert UC214D1, 125 mm OD) and has a unit mass of about 5.4 kg. Flange figures: height H 265 mm, length L 160 mm, bolt centres J 216 mm, holes 23 mm for M20 bolts.
What does the UCFL214 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 70 mm bore. UCFL214 is built from housing FL214 plus insert UC214D1 (D1 = greasable).
How is UCFL214 locked to the shaft, and how tight should the setscrews be?
The UC214D1 insert uses two collar setscrews on the 70 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 UCFL214 instead of a pillow block?
Choose the UCFL214 two-bolt flange when the 70 mm shaft meets a vertical frame or side plate: the diamond housing bolts flush with two M20 bolts on 216 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.