UCP202 bearing: complete specifications & equivalents
The UCP202 is a JIS B 1559 radial bearing sized 15 x 35 x 31 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 | 15 mm |
| Outer diameter D | 35 mm |
| Width B | 31 mm |
| Seal / shield | 2RS |
| Basic dynamic load rating C | 14.2 kN |
| Basic static load rating C0 | 6.65 kN |
| Fatigue load limit Pu | 0.505 kN |
| Mass | 700 g |
| Housing height H | 30.2 mm |
| Housing overall length L | 127 mm |
| Mounting bolt center distance J | 95 mm |
| Mounting hole diameter N | 13 mm |
| Manufacturer designation | UCP202 |
| 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 | 0.591 in |
|---|---|
| Outer diameter D | 1.378 in |
| Width B | 1.22 in |
| ISO bore code | 02 |
| Radial section height (D−d)/2 | 10 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) | 2 of 25 |
| Bore above smallest UCP-series size | 3 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| UCP202 | 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 UCP202 model number is decoded
In NTN's mounted-ball-bearing range, UCP202 is the classic upright pillow block for a 15 mm shaft: insert UC202D1, housing P203, two foundation bolts. The UCP202 number follows NTN's mounted-unit convention: housing letter P, 2-series section, bore code for 15 mm; P203 and UC202D1 are the separate housing and insert part numbers inside. Shaft size is 15 mm; the cast base stands 30.2 mm to the shaft centre (H), is 127 mm long overall (L), and the two foundation holes on 95 mm centres (J) clear 13 mm M10 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. Small-bore mounted units like this are chosen mostly to eliminate bearing-housing design work on OEM machines built in the tens of units rather than for duty-cycle reasons. Sugar and fertiliser handling relies on this unit where corrosion and fine crystals attack everything: the sealed insert and the grease nipple let crews purge contaminated grease after each campaign. Check the shaft itself is straight to roughly 0.05 mm over the bearing centres before blaming a noisy new unit: mounted bearings accept housing misalignment but cannot offset a bent shaft. Basic ratings of the UC202D1 insert are 14.2 kN dynamic and 6.65 kN static; the assembled UCP202 weighs about 0.7 kg.
Typical equipment & failure modes
Common applications
- appliance and HVAC OEM drives
- food-table and bottle-line rollers
- small fans and blowers
- low-speed heavily loaded pulleys where the static rating governs the selection
Known failure patterns
- fretting corrosion of the shaft journal under the wide inner ring after years of micro-creep
- 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
Selection pitfalls — read before you substitute
- The standard 2-series insert in UCP202 is the lightest section at 15 mm — do not substitute it into a position that previously ran an X or 3 unit: the 95 mm mounting may match while the load rating does not.
- As a pillow block, UCP202 needs a prepared horizontal surface at the 30.2 mm centre height: shim both feet with full-width packs so the 127 mm base seats over its full area.
- When ordering covers for UCP202, note the steel and cast-iron cover executions change the unit mass and envelope but not the 95 mm mounting centres.
- UCP202 weighs little but its cast feet still crack on an uneven weldment; the 95 mm bolt centres must sit on a flat face, not bridge a weld bead.
Frequently asked questions
What are the dimensions of an UCP202 mounted bearing?
UCP202 takes a 15 mm shaft (insert UC202D1, 35 mm OD) and has a unit mass of about 0.7 kg. Housing figures: centre height H 30.2 mm, length L 127 mm, bolt centres J 95 mm, foot holes 13 mm for M10 bolts.
What does the UCP202 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 15 mm bore. UCP202 is built from housing P203 plus insert UC202D1 (D1 = greasable).
How is UCP202 locked to the shaft, and how tight should the setscrews be?
The UC202D1 insert uses two collar setscrews on the 15 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 UCP202 instead of a flanged unit?
Choose the UCP202 pillow block when the shaft runs parallel to a horizontal base plate, rail or plinth — the upright housing holds the shaft centre 30.2 mm above the 127 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.