Bearing unit - UCP 212 NTN

Product detailed description

UCP 212 NTN is a pillow block bearing unit for a 60 mm shaft. Two set screws lock the bearing to the shaft; the designation without D1 identifies the maintenance-free version.

Construction and bearing

The unit combines a ball bearing with a one-piece cast iron housing. The spherical outer ring matches the housing’s spherical seat, allowing alignment during mounting. Its internal construction is that of a single-row ball bearing for radial and axial forces. Both sides have a synthetic rubber seal and slinger combination. Two set screws secure the inner ring to the shaft, while the two base fixing holes connect the housing to the support structure.

Selection and mounting dimensions

• Designation: UCP 212 NTN
• Product type: Pillow block bearing unit
• Shaft diameter: 60 mm
• Catalogue dimension H: 69.8 mm
• Catalogue dimension L: 241 mm
• Catalogue dimension J: 184 mm
• Catalogue dimension A: 70 mm
• Catalogue dimension N: 20 mm
• Catalogue dimension N1: 23 mm
• Catalogue dimension H1: 25 mm
• Catalogue dimension H2: 138 mm
• Catalogue dimension L1: 70 mm
• Catalogue dimension B: 65.1 mm
• Catalogue dimension S: 25.4 mm
• Shaft locking: Set screws
• Specified mounting bolt size: M16
• Housing material: Cast iron
• Number of fixing holes: 2
• Lubrication: Maintenance-free version without D1

H 69.8 mm is shaft centre height above the mounting face; H2 138 mm is overall housing height. Length L 241 mm and pitch J 184 mm define the base arrangement. N 20 mm and N1 23 mm are the width and length of the slotted fixing hole. Housing width A 70 mm differs from inner-ring width B 65.1 mm. S 25.4 mm is the distance from the inner-ring face to the bearing centre.

Mounting and interfaces

Seat the base on a clean, flat and sufficiently rigid support and check alignment with the other bearing position. The catalogue specifies M16 base bolts; their size does not determine set-screw torque or automatic supply contents. Lock the bearing on a clean shaft following NTN’s mounting procedure, without transmitting force through the balls. Check free rotation after mounting. For replacement, consider centre height, bolt spacing and space around the housing together.

Lubrication and maintenance

NTN explicitly distinguishes relubricatable D1 units from maintenance-free units without D1. This item is designated UCP 212; do not automatically assign the operating regreasing provisions of UCP212D1. The maintenance-free version contains a factory grease fill intended for long service without replenishment under suitable conditions. The manufacturer describes this version for normal indoor service; heavy dust, exposure to liquids or other demanding conditions require selection of the appropriate specific version. Still inspect the seals, shaft locking and running condition regularly. Dust-cover prefixes and D1 change the version and must be retained when selecting a replacement.