UCP213 bearing: complete specifications & equivalents
The UCP213 is a JIS B 1559 radial bearing sized 65 x 120 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 | 65 mm |
| Outer diameter D | 120 mm |
| Width B | 65.1 mm |
| Seal / shield | 2RS |
| Basic dynamic load rating C | 63.5 kN |
| Basic static load rating C0 | 40 kN |
| Fatigue load limit Pu | 3.15 kN |
| Mass | 5600 g |
| Housing height H | 76.2 mm |
| Housing overall length L | 265 mm |
| Mounting bolt center distance J | 203 mm |
| Mounting hole diameter N | 25 mm |
| Manufacturer designation | UCP213 |
| 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 | 2.559 in |
|---|---|
| Outer diameter D | 4.724 in |
| Width B | 2.563 in |
| ISO bore code | 13 |
| 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) | 13 of 25 |
| Bore above smallest UCP-series size | 53 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| UCP213 | 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 UCP213 model number is decoded
UCP213 belongs to NTN's UCP line of cast-iron pillow blocks built to JIS B 1559 housing boundary dimensions around a JIS B 1558 UC213D1 insert. The code breaks down as insert family UC, housing form P (pillow block), duty series 2, bore code ending in the 65 mm shaft size; the unit is built from insert UC213D1 and housing P213. For layout work on UCP213: the 65 mm shaft centre sits 76.2 mm above the sole (H), the footprint is 265 mm long (L), bolt centres are 203 mm (J), and the foot holes suit M20 (25 mm) bolts. 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. 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. Belt-conveyor builders fit this unit at the drive and tail pulleys: the spherical seat absorbs the small angular errors of a welded truss, and the setscrew lock keeps the inner ring stationary on a shaft that reverses every time the belt is run back. Torque the two setscrews in sequence: run the first to half value, the second to full value, then come back to the first; NTN’s recommended setscrew torque rises sharply with shaft size, so use the table for this bore rather than a wrench feel inherited from smaller units. Basic ratings of the UC213D1 insert are 63.5 kN dynamic and 40 kN static; the assembled UCP213 weighs about 5.6 kg.
Typical equipment & failure modes
Common applications
- cement and clinker handling
- sugar-mill and fertiliser plant drives
- heavy bulk-handling conveyors
- fan drives where belt tension, not transmitted torque, sets the radial load
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
- The standard 2-series insert in UCP213 is the lightest section at 65 mm — do not substitute it into a position that previously ran an X or 3 unit: the 203 mm mounting may match while the load rating does not.
- As a pillow block, UCP213 needs a prepared horizontal surface at the 76.2 mm centre height: shim both feet with full-width packs so the 265 mm base seats over its full area.
- When ordering covers for UCP213, note the steel and cast-iron cover executions change the unit mass and envelope but not the 203 mm mounting centres.
- At 65 mm bore the 265 mm base of UCP213 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 UCP213 mounted bearing?
UCP213 takes a 65 mm shaft (insert UC213D1, 120 mm OD) and has a unit mass of about 5.6 kg. Housing figures: centre height H 76.2 mm, length L 265 mm, bolt centres J 203 mm, foot holes 25 mm for M20 bolts.
What does the UCP213 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 65 mm bore. UCP213 is built from housing P213 plus insert UC213D1 (D1 = greasable).
How is UCP213 locked to the shaft, and how tight should the setscrews be?
The UC213D1 insert uses two collar setscrews on the 65 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 UCP213 instead of a flanged unit?
Choose the UCP213 pillow block when the shaft runs parallel to a horizontal base plate, rail or plinth — the upright housing holds the shaft centre 76.2 mm above the 265 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.