UCP214 bearing: complete specifications & equivalents
The UCP214 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 | 6500 g |
| Housing height H | 79.4 mm |
| Housing overall length L | 266 mm |
| Mounting bolt center distance J | 210 mm |
| Mounting hole diameter N | 25 mm |
| Manufacturer designation | UCP214 |
| 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 & UCP-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 UCP-series | 12 mm |
| Largest outer diameter in UCP-series | 300 mm |
| Width range across UCP-series | 31–145 mm |
| Bore position in UCP-series (smallest first) | 14 of 25 |
| Bore above smallest UCP-series size | 58 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| UCP214 | 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 UCP214 model number is decoded
A 70 mm bore upright mounted bearing, NTN UCP214 combines the UC214D1 self-aligning insert with the grey-iron P214 pillow block base. NTN's numbering ties the unit to its components: UCP214 means the P214 housing carrying the UC214D1 insert, with the last two digits denoting the 70 mm bore in the 2-series duty class. The foundation drawing needs four numbers: H 79.4 mm centre height, L 266 mm total length, J 210 mm between the 25 mm bolt holes, and a 70 mm shaft passing through the 125 mm OD insert. 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 upright base carries the shaft parallel to and above the mounting surface, which is the arrangement fan, conveyor and transmission drives use whenever a plinth or rail is available. 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. Lumber-yard and planer-mill equipment fits this unit where bark chips and planer shavings rain on the housing; the slinger flings particles away before they reach the lip seal. When fitting a steel or cast-iron end cover, torque its cap screws lightly in sequence — the cover locates the grease, it is not a bearing shoulder, and a warped cover drags on the rotating inner ring. Basic ratings of the UC214D1 insert are 69 kN dynamic and 44 kN static; the assembled UCP214 weighs about 6.5 kg.
Typical equipment & failure modes
Common applications
- sugar-mill and fertiliser plant drives
- heavy bulk-handling conveyors
- process fans and induced-draft drives
- frequent stop-start and reversing duty such as shuttle and tripper conveyors
Known failure patterns
- lip-seal failure from grit past the slinger, followed by grease loss and abrasive wear
- spherical-seat fretting that welds insert to housing and destroys the self-aligning action
- water-emulsified grease after washdown with the fitting facing upward
Selection pitfalls — read before you substitute
- As a pillow block, UCP214 needs a prepared horizontal surface at the 79.4 mm centre height: shim both feet with full-width packs so the 266 mm base seats over its full area.
- The D1 suffix on UC214D1 means the greasable execution; a unit without it has no fitting path, so do not assume every UCP214 on site accepts relubrication.
- Self-aligning is not the same as free to move: the UC214D1 insert of UCP214 pivots to correct static misalignment, but a continuously bending shaft still frets the spherical seat.
- UCP214 at 70 mm uses M20 bolts that need a torque wrench and a cross pattern; pulling one bolt first tips the 79.4 mm centre height and binds the insert.
- The standard 2-series insert in UCP214 is the lightest section at 70 mm — do not substitute it into a position that previously ran an X or 3 unit: the 210 mm mounting may match while the load rating does not.
Frequently asked questions
What does the UCP214 designation mean?
UC identifies the wide-inner-ring, setscrew-locking ball bearing insert; P the upright pillow block housing; 2 is the duty series; the last digits encode the 70 mm bore. UCP214 is built from housing P214 plus insert UC214D1 (D1 = greasable).
How is UCP214 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 pillow block like UCP214 instead of a flanged unit?
Choose the UCP214 pillow block when the shaft runs parallel to a horizontal base plate, rail or plinth — the upright housing holds the shaft centre 79.4 mm above the 266 mm bolt-down base. Choose a UCFL flange when the shaft meets a vertical frame face and the housing bolts flat against it.
Is the UCP214 bearing self-aligning?
Yes within limits. The UC214D1 insert has a spherical outer diameter that pivots in the P214 housing bore, compensating for a few degrees of static misalignment between shaft and foundation. It does not compensate for a bent shaft or dynamic deflection while running.
What are the dimensions of an UCP214 mounted bearing?
UCP214 takes a 70 mm shaft (insert UC214D1, 125 mm OD) and has a unit mass of about 6.5 kg. Housing figures: centre height H 79.4 mm, length L 266 mm, bolt centres J 210 mm, foot holes 25 mm for M20 bolts.
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.