UCP207 bearing: complete specifications & equivalents
The UCP207 is a JIS B 1559 radial bearing sized 35 x 72 x 42.9 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 | 35 mm |
| Outer diameter D | 72 mm |
| Width B | 42.9 mm |
| Seal / shield | 2RS |
| Basic dynamic load rating C | 28.4 kN |
| Basic static load rating C0 | 15.3 kN |
| Fatigue load limit Pu | 1.09 kN |
| Mass | 1600 g |
| Housing height H | 47.6 mm |
| Housing overall length L | 167 mm |
| Mounting bolt center distance J | 127 mm |
| Mounting hole diameter N | 17 mm |
| Manufacturer designation | UCP207 |
| 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 | 1.378 in |
|---|---|
| Outer diameter D | 2.835 in |
| Width B | 1.689 in |
| ISO bore code | 07 |
| Radial section height (D−d)/2 | 18.5 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) | 7 of 25 |
| Bore above smallest UCP-series size | 23 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| UCP207 | 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 UCP207 model number is decoded
The NTN UCP207 unit pairs a UC207D1 sealed ball bearing insert with a one-piece P207 cast-iron pillow block housing, delivered aligned, greased and ready to bolt down. The UCP207 number follows NTN's mounted-unit convention: housing letter P, 2-series section, bore code for 35 mm; P207 and UC207D1 are the separate housing and insert part numbers inside. Shaft size is 35 mm; the cast base stands 47.6 mm to the shaft centre (H), is 167 mm long overall (L), and the two foundation holes on 127 mm centres (J) clear 17 mm M14 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. The 25–50 mm bore band is the workhorse of industry — belt conveyors, fans, agricultural drives and small process machines — which is why this range has the fullest choice of series and cover options. Quarry and aggregate conveyors specify this unit because maintenance crews can unbolt the whole assembly and swap it in minutes; interchangeability across brands at the JIS dimensions is part of the selection logic. Cold-climate users should order the low-temperature grease option or repack before commissioning: the factory fill is a general-purpose NLGI 2 that channels poorly below about −20 °C and starves the ball set on start-up. Basic ratings of the UC207D1 insert are 28.4 kN dynamic and 15.3 kN static; the assembled UCP207 weighs about 1.6 kg.
Typical equipment & failure modes
Common applications
- industrial fans and blowers
- agricultural augers and bucket elevators
- small crushers and screening feeds
- vibrating feeder and screen-adjacent positions where setscrew retorque is routine
Known failure patterns
- 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
- cracked cast ear from mounting on an uneven face and pulling one bolt fully first
Selection pitfalls — read before you substitute
- When ordering covers for UCP207, note the steel and cast-iron cover executions change the unit mass and envelope but not the 127 mm mounting centres.
- In this bore band the temptation is to choose UCP207 on shaft size alone; belt pull often dominates the radial load, so rate the unit against the overhung pulley force, not just transmitted power.
- The standard 2-series insert in UCP207 is the lightest section at 35 mm — do not substitute it into a position that previously ran an X or 3 unit: the 127 mm mounting may match while the load rating does not.
- As a pillow block, UCP207 needs a prepared horizontal surface at the 47.6 mm centre height: shim both feet with full-width packs so the 167 mm base seats over its full area.
- Do not confuse UCP207 with a bare UC207D1 bearing: replacing only the insert is possible, but the housing P207 must be unworn and the spherical seat cleaned and coated with anti-seize.
Frequently asked questions
When should I choose a pillow block like UCP207 instead of a flanged unit?
Choose the UCP207 pillow block when the shaft runs parallel to a horizontal base plate, rail or plinth — the upright housing holds the shaft centre 47.6 mm above the 167 mm bolt-down base. Choose a UCFL flange when the shaft meets a vertical frame face and the housing bolts flat against it.
What loads can the UCP207 unit carry?
The UC207D1 insert is rated at 28.4 kN dynamic and 15.3 kN basic static (fatigue load limit 1.09 kN). Mounted units are predominantly selected on radial load from belt pull and overhung weight; axial capacity is limited and should be checked separately.
What are the dimensions of an UCP207 mounted bearing?
UCP207 takes a 35 mm shaft (insert UC207D1, 72 mm OD) and has a unit mass of about 1.6 kg. Housing figures: centre height H 47.6 mm, length L 167 mm, bolt centres J 127 mm, foot holes 17 mm for M14 bolts.
What does the UCP207 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 35 mm bore. UCP207 is built from housing P207 plus insert UC207D1 (D1 = greasable).
How is UCP207 locked to the shaft, and how tight should the setscrews be?
The UC207D1 insert uses two collar setscrews on the 35 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.
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.