NSK7209CTDULPA7Super Precision Angular Contact Ball Bearing — 45 mm ID, 85 mm OD, 19 mm Width, 15° Contact Angle, Universally Ground Duplex Pair, Light Preload, Phenolic Cage

Product Description

What this part is:

NSK 7209C T DUL PA7 is a super-precision single-row angular contact ball bearing supplied as a universally ground duplex pair. Unit Quantity: 2 Pcs. Bore Diameter: 45 mm. Outside Diameter: 85 mm. Overall Width: 19 mm. Contact Angle: 15°. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1 per bearing. Cage Material: Phenolic. Cage Type: Outer-ring guided. Bearing Material: Steel. Series: NSK 7200C super precision. Base Number: 7209C.

Decoding the designation:

7209 — 72 heavy series super-precision angular contact ball bearing in the 09 bore size, giving a 45 mm bore in a larger section than the 70 series.

C — 15° contact angle.

T — phenolic resin cage, guided on the outer ring.

DU — duplex universal, a matched pair that mates back-to-back, face-to-face or in tandem.

L — light preload class.

PA7 — NSK execution suffix.

Specifications:

Dynamic Load Rating: 51,500 N (11,578 lbf) per bearing. Static Load Rating: 28,800 N (6,475 lbf) per bearing. Limiting Speed: 17,700 rpm grease; 27,000 rpm oil. Permissible axial load Pa: 19.6 kN per bearing. Item Weight: 0.406 kg (0.895 lb) per bearing. Lubricant: grease or oil/oil-air, at a recommended grease quantity of 2.5 g per bearing. Mounting Arrangement: duplex universal (DU). Preload: Light (L).

Dimensions and mounting:

Effective load centre a: 18.2 mm. Shaft abutment diameter da min: 52 mm. Housing abutment diameter Da max: 78 mm. Housing abutment diameter Db max: 80 mm. Chamfer r min: 1.1 mm. Chamfer r1 min: 0.6 mm. Shaft fillet ra max: 1 mm. Housing fillet rb max: 0.6 mm.

Compatibility and replacement:

Cross-references at 45 x 85 x 19 mm and 15° contact angle: SKF 7209 CD/P4A, FAG B7209-C-T-P4S, Timken/Fafnir 2MM9209WI, Barden 209HC, RHP 7209CT, Koyo 7209C, NTN 7209C and NACHI 7209C. SKF 7209 ACD/P4A has the same 45 x 85 x 19 mm size at 25° contact angle.

Frequently asked questions:

What is the contact angle of the NSK 7209C T DUL PA7?

15°, set by the C in the designation.

How many bearings are supplied?

Two pieces as a universally ground duplex pair (DU) with light preload (L). Load ratings and mass are stated per bearing.

What are the load ratings and speed limit?

Dynamic Load Rating 51,500 N and Static Load Rating 28,800 N per bearing. Limiting Speed 17,700 rpm with grease and 27,000 rpm with oil.