NSKHR32209JDBP5+KL6CP21Tapered Roller Bearing – Back-to-Back Matched Pair, 45 mm ID, 85 mm OD, 49.5 mm Total Width, P5 Precision, Pressed Steel Cage

Product Description

What this part is

NSK HR32209JDBP5 tapered roller bearings, supplied as a back-to-back matched pair. Bore: 45 mm. Outside diameter: 85 mm. Total width across the pair: 49.5 mm. Each bearing is a complete assembly of cone and cup, total width 24.75 mm, inner ring width 23 mm, outer ring width 19 mm. Metric series 32209, ISO 355 dimension series.

Decoding the designation

HR: high-capacity internal design. J: pressed steel cage. DB: back-to-back matched arrangement. P5: ISO precision class 5, equivalent to ABEC 5. Searchable forms include HR32209JDBP5, HR-32209J-DB-P5, HR 32209 J DB P5, HR32209J and 32209.

What these specs mean in practice

Basic dynamic load rating: 102 kN per bearing. Basic static load rating: 102 kN per bearing. These are complete-bearing ratings, cone and cup together. Limiting speed: 4,300 rpm on grease, 6,000 rpm on oil-bath, 8,000 rpm on controlled jet lubrication. Effective load centre: 20.1 mm. Axial load factors: e 0.41, Y0 0.81, Y1 1.5. Tapered rollers carry heavy combined radial and thrust load, and the HR design raises capacity over the standard 32209 on the same envelope. P5 precision holds tighter bore, outside diameter and running-accuracy tolerances, giving closer shaft location and lower running vibration.

Quantity and configuration

A factory back-to-back pair: two complete tapered roller bearings, four rings and two roller sets. Mounted back to back the two contact lines diverge outward, which widens the effective bearing span and gives high resistance to overturning moment and tilting.

Fitting notes

Shaft abutment diameter: 56 mm minimum, 53 mm maximum on the small side face. Housing abutment diameter: 73 mm minimum, 76 mm maximum, with 81 mm on the large side. Shaft and housing fillet radius: 1.5 mm maximum. Space required in the housing: 3 mm on the large side face, 5.5 mm on the small side face.

Interchange guidance

The 45 x 85 x 24.75 mm envelope is shared with SKF 32209, Timken 32209 and FAG 32209-A. Those are standard-class single bearings, so they cover the size while the P5 matched pair here is the tighter-tolerance execution.