NTNF-UC205-100D1Insert Ball Bearing, 1 in Bore, Spherical Outer Ring, Set Screw Locking, Lip Seals, 2 Pcs

Product Description

What this part is

An NTN F-UC205-100D1 insert ball bearing, 1 inch bore, single row, with a wide inner ring, a spherical outer ring, set-screw locking, a single lip seal on each face and a relubrication fitting. Grease lubricated, CN internal clearance, standard duty.

Decoding the designation

UC is the insert, or cartridge, ball bearing: a deep groove bearing with an extended inner ring carrying two set screws and an outer ring ground to a spherical form. 205 places it in the 02 series 25 mm frame size, and the -100 suffix gives the 1 inch bore that replaces the metric 25 mm. The remaining characters are NTN factory suffixes carried on the carton and are held as cross-references.

What these specs mean in practice

The spherical outer ring seats in a matching spherical housing bore, so the insert self-aligns to compensate for shaft-to-housing misalignment at assembly. The two set screws at 120° clamp the extended inner ring onto a plain, unshouldered shaft, which is why insert bearings suit conveyor and agricultural shafting where no bearing seat has been machined. Lip seals plus the grease fitting give a relubricatable, washdown-tolerant arrangement at moderate speed.

Quantity and configuration

2 Pcs. Insert bearing only: inner ring, ball and cage set, spherical outer ring, seals and set screws.

Housing style and mounting

The spherical outer ring fits any 205-frame housing with a matching spherical bore — two-bolt oval flange, four-bolt square flange, three-bolt bracket, pillow block or take-up frame. The insert and the housing are separate parts in this series.

Interchange guidance

SKF YAR 205-100-2F and Dodge INS-SC-100 are same-frame set-screw inserts for a 1 inch shaft. NTN UC205-100 is the same insert in the base designation. NTN UK205 is a related size with a 1:12 tapered bore that mounts on an H2305 adapter sleeve, so its bore is not the shaft size.