SKFN208MP5Cylindrical Roller Bearing – 40 mm ID, 80 mm OD, 18 mm Width, N Design, Machined Brass Cage, ABEC 5 / P5

Product Description

What this part is

SKF N 208 M/P5 single-row cylindrical roller bearing. Bore Diameter: 40 mm. Outside Diameter: 80 mm. Overall Width: 18 mm. Rolling Elements: Cylindrical Roller. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Cage Material: Machined brass. Cage Type: Machined. Precision Class: ABEC 5 / P5. Internal Clearance: CN. Bearing Material: Bearing steel. Series: N200. Base Number: N208. Unit Quantity: 1 Pc.

Decoding the designation

N — two integral flanges on the inner ring, a flangeless outer ring. The rings separate, and the bearing is a non-locating position: the outer ring is free to move axially relative to the roller set.

2 — ISO dimension series 02. 08 — bore code. Bore Diameter: 40 mm.

M — one-piece machined brass cage. Brass handles high speed, shock loading and elevated temperature better than pressed steel or polyamide.

P5 — tolerance class P5, equivalent to ABEC 5. Closer bore and outside-diameter tolerance and lower radial and axial runout than a standard bearing.

Searchable forms of the designation: N-208-M/P5, N208M/P5, N208MP5, N 208 M P5, N-208-M-P5-C781, N208.

What these specs mean in practice

A cylindrical roller carries far more radial load than a ball in the same envelope, because the roller meets the raceway along a line rather than at a point.

The N form takes no axial load. It is the free end of a two-bearing arrangement, with a separate locating bearing setting the shaft position, and it absorbs thermal growth of the shaft without building an axial force.

Precision Class: ABEC 5 / P5 buys closer bore and outside-diameter tolerance and lower runout, which shows up as less spindle vibration and closer shaft location under load. It is the class specified for machine-tool and precision gearbox positions.

Cage Material: Machined brass. A cylindrical roller bearing has no contact angle.

Mounting data

Bore Diameter: 40 mm, straight. Outside Diameter: 80 mm. Overall Width: 18 mm. Shaft abutment diameter da 47 mm minimum to 69 mm maximum. Housing abutment diameter Da 73 mm minimum to 74.1 mm maximum. Fillet radius ra max 1 mm, rb max 1 mm. Chamfer dimension r1,2 min 1.1 mm, r3,4 min 1.1 mm. Both rings take an interference fit and are mounted separately.

Quantity and configuration

Unit Quantity: 1 Pc. One complete bearing: inner ring with roller and cage assembly, plus the plain outer ring.

Interchange guidance

Cross-Reference 1: SKF N 208 ECM/P5. Cross-Reference 2: FAG N208-E-XL-M1-P5. Cross-Reference 3: NSK N208M. Cross-Reference 4: NTN N208G1. Cross-Reference 5: Timken N208. Cross-Reference 6: RHP N208M. Cross-Reference 7: Koyo N208. Cross-Reference 8: Nachi N208. Cross-Reference 9: SNR N208EG15.

All nine share the 40 x 80 x 18 mm envelope and the N design with a flangeless outer ring, and drop into any housing and shaft cut for an N208.