UCP212 bearing: complete specifications & equivalents
The UCP212 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 | 4700 g |
| Housing height H | 69.8 mm |
| Housing overall length L | 241 mm |
| Mounting bolt center distance J | 184 mm |
| Mounting hole diameter N | 20 mm |
| Manufacturer designation | UCP212 |
| 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 | 2.362 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 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) | 12 of 25 |
| Bore above smallest UCP-series size | 48 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| UCP212 | 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 UCP212 model number is decoded
NTN ships the UCP212 as a matched assembly — UC212D1 insert swaged into the P212 cast-iron pillow block — so the fitter never has to set bearing-to-housing clearance. Reading the designation: UC marks the wide-inner-ring, setscrew-locking insert; P marks the upright pillow block housing; the 2 code identifies the duty series and the final two digits encode the 60 mm bore. Key mounting figures: centre height H = 69.8 mm, overall base length L = 241 mm, bolt-hole spacing J = 184 mm, and each of the two feet takes a 20 mm (M16) fastener for 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 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. 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. Food and packaging lines choose this unit when the layout allows an external mount: it lives outside the washdown zone, sealed and greased for life intervals that outlast a production campaign. Use grade 8.8 foundation bolts with flat washers under both head and nut, and pull them in stages in a cross pattern; the cast feet are strong in compression but a single over-torqued bolt can crack an ear. Basic ratings of the UC212D1 insert are 58 kN dynamic and 36 kN static; the assembled UCP212 weighs about 4.7 kg.
Typical equipment & failure modes
Common applications
- sawmill arbors and feed rolls
- cement and clinker handling
- sugar-mill and fertiliser plant drives
- long line-shafting where several units must share a straight reference
Known failure patterns
- cracked cast ear from mounting on an uneven face and pulling one bolt fully first
- 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
Selection pitfalls — read before you substitute
- Heavy drives on UCP212 should have the setscrews re-torqued after the first day; at 60 mm bore the seating forces are large and a loose inner ring frets the shaft in weeks.
- The standard 2-series insert in UCP212 is the lightest section at 60 mm — do not substitute it into a position that previously ran an X or 3 unit: the 184 mm mounting may match while the load rating does not.
- As a pillow block, UCP212 needs a prepared horizontal surface at the 69.8 mm centre height: shim both feet with full-width packs so the 241 mm base seats over its full area.
- The lip seals and slingers on UCP212 suit ordinary industrial dust; submerged or heavy slurry service needs a different sealed arrangement regardless of the load rating.
- Never weld a bracket to the P212 housing of UCP212: local heat cracks cast iron and distorts the spherical bore that the insert depends on.
Frequently asked questions
Does UCP212 interchange with other brands at the same size?
Mounted units of this class follow JIS B 1559 housing and JIS B 1558 insert dimensions, so the shaft size, centre height and 184 mm bolt centres of UCP212 interchange with other makers' equivalent designation. Always re-verify ratings and seal execution rather than assuming the suffix letters match.
What are the dimensions of an UCP212 mounted bearing?
UCP212 takes a 60 mm shaft (insert UC212D1, 110 mm OD) and has a unit mass of about 4.7 kg. Housing figures: centre height H 69.8 mm, length L 241 mm, bolt centres J 184 mm, foot holes 20 mm for M16 bolts.
What does the UCP212 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 60 mm bore. UCP212 is built from housing P212 plus insert UC212D1 (D1 = greasable).
How is UCP212 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 pillow block like UCP212 instead of a flanged unit?
Choose the UCP212 pillow block when the shaft runs parallel to a horizontal base plate, rail or plinth — the upright housing holds the shaft centre 69.8 mm above the 241 mm bolt-down base. Choose a UCFL flange when the shaft meets a vertical frame face and the housing bolts flat against it.
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.