UCFLX07 bearing: complete specifications & equivalents

Specification table

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.

Cross references & equivalents

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 UCFLX07 model number is decoded

For a 35 mm shaft ending at or passing through a vertical frame face, NTN UCFLX07 is the diamond-flange answer: UCX07D1 insert inside the FLX07 cast-iron housing. The UCFLX07 number follows NTN's mounted-unit convention: housing letter FL, X-series section, bore code for 35 mm; FLX07 and UCX07D1 are the separate housing and insert part numbers inside. Shaft size is 35 mm; the 171 mm overall-height flange is 105 mm long across the rhombus (L), with its two mounting holes on 144 mm centres (J) clearing 16 mm M14 bolts. The X section is NTN’s intermediate-duty build: a wider UCX insert with a higher rating sits in a longer, sturdier housing than the 2-series unit at the same bore. The diamond flange carries the shaft square to a vertical face — a welded frame, side plate or gearbox wall — so no base plinth and no shim pack under the bearing are required. This mid bore range dominates agricultural and bulk-handling builds, where standard shafts, cast feet and greasable inserts keep replacement a stock-room, not a workshop, exercise. Cement plant clinker conveyors fit this size under insulation and heat shields; radiant heat dictates both the grease grade and a relubrication interval far shorter than the load alone would suggest. If the unit is the locating bearing, clamp the inner ring with both setscrews and keep the housing feet tight; the opposite unit on the shaft must be the float design with slots, or thermal growth preloads both bearings. Basic ratings of the UCX07D1 insert are 32.5 kN dynamic and 17.8 kN static; the assembled UCFLX07 weighs about 1.8 kg.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Never weld a bracket to the FLX07 housing of UCFLX07: local heat cracks cast iron and distorts the spherical bore that the insert depends on.
• The standard section of UCFLX07 can look adequate at 35 mm while the X or 3 section is the real choice for long conveyor centres; compare ratings rather than fitting the same unit line-wide.
• The X insert of UCFLX07 is wider and rated above the 2-series part at 35 mm, but it is not interchangeable with a 3-series unit in a damaged application — check the housing length and bolt centres before swapping.
• As a rhombus flange, UCFLX07 pulls against the frame through only two M14 bolts on 144 mm centres; the mounting plate must be stiff enough not to bend between them under belt load.
• The lip seals and slingers on UCFLX07 suit ordinary industrial dust; submerged or heavy slurry service needs a different sealed arrangement regardless of the load rating.