NTNNU209G1P5Cylindrical Roller Bearing – Single Row NU Design, 45 mm ID, 85 mm OD, 19 mm Width, Separable Plain Inner Ring, Non-Locating, ABEC 5

Product Description

What this part is

NTN NU209G1P5 single-row cylindrical roller bearing, NU design, separable. Series: NU200 (ISO dimension series 02). Bore: 45 mm. Outside Diameter: 85 mm. Width: 19 mm. Bore Type: Straight. Rolling Elements: Cylindrical Roller. Number Of Rows: 1. Precision Class: P5, ABEC 5.

Decoding the designation

NU209 — the ISO NU209 size, 45 x 85 x 19 mm. The NU design carries both guiding ribs on the outer ring and a plain inner ring.

G1 — NTN order-code token, recorded as a designation variant.

P5 — precision class P5, equivalent to ABEC 5.

What these specs mean in practice

Dynamic Load Rating: 46,000 N (46.0 kN, 10,341 lbf). Static Load Rating: 47,000 N (47.0 kN, 10,566 lbf). Limiting Speed: 9,900 r/min on oil, 8,400 r/min on grease. Precision Class: ABEC 5. Chamfer r: 1 mm. Inner raceway diameter Fw: 55 mm. Mass: 0.43 kg (0.944 lb). Bearing Material: Hardened alloy steel. Internal Clearance: CN.

Line contact between straight rollers and straight raceways puts far more steel behind a radial load than a ball ever can, so a 45 mm bore reaches 46 kN dynamic in an 85 mm envelope. The NU design leaves the inner ring plain, so the inner ring and the roller-and-cage assembly separate for mounting and the shaft is free to grow axially inside the outer ring. That is the classic floating position on a motor or gearbox shaft, with a located bearing at the other end. ABEC 5 tightens the running accuracy for a spindle or a high-speed drive.

Mounting data

Shaft abutment diameter da: 51.5 mm minimum. Housing abutment diameter Da: 78.5 mm maximum. Inner ring abutment db: 51.5 mm minimum. Outer ring abutment Db: 78.5 mm maximum. Shaft or housing fillet radius r1as: 1 mm maximum. The rings separate, so the inner ring can be heated and fitted to the shaft on its own before the roller assembly enters the outer ring.

Quantity and configuration

Unit Quantity: 1 Pc.

Interchange guidance

Cross-references: SKF NU 209 ECP, FAG NU209-E-XL-TVP2, NSK NU209, Koyo NU209. Searchable variants of the designation: NU209G1P5, NU209 G1 P5, NU-209-G1-P5, NU209. An NJ209 is the same envelope with a single rib added to the inner ring, which locates the shaft in one direction, and an NUP209 adds a loose rib for both directions.