SNFASEB17-7CE1DUHSuper-Precision Angular Contact Ball Bearing Matched Pair – Straight Bore, 17 mm ID, 30 mm OD, 7 mm Width, Open, 15° Contact Angle, Heavy Preload, Phenolic Cage, ABEC 7

Product Description

What this part is:

SNFA SEB17-7CE1DUH is a duplex matched pair of super-precision angular contact ball bearings. ISO Designation: 71903, the thin 719 dimension series. Preload: Heavy (H). Precision Class: ABEC 7 / P4. SNFA is a French super-precision manufacturer, now part of the SKF group.

Decoding the designation:

SEB — SNFA series that maps to the ISO 719 family.

17 — bore in millimetres.

7 — ABEC class 7.

CE1 — 15° contact angle.

DUH — duplex universal set at heavy preload.

7903-C-T-P4-DUH — the carton’s ISO-style reading: C is 15°, T is a phenolic cage, P4 is ABEC 7.

2MM9303WI-CR-DUH — the carton’s Fafnir reading: 2MM is 15°, the 9300 prefix maps to ISO 719, CR is a phenolic outer-land-riding cage.

Specifications:

Bore Diameter: 17 mm. Outside Diameter: 30 mm. Width: 7 mm per bearing, 14 mm across the mounted pair. Contact Angle: 15°. Preload: Heavy (H). Precision Class: ABEC 7 / P4. Closure Type: Open. Cage Material: Phenolic resin. Bore Type: Straight. Number Of Rows: 1 per bearing. Rolling Elements: Ball. Unit Quantity: 2 Pcs, one matched pair. Snap Ring Included: No. A 15° contact angle favours speed and radial stiffness over thrust capacity. Heavy preload gives the highest axial and radial rigidity and the tightest running accuracy under load. The phenolic cage suits high shaft speeds and sets the practical temperature ceiling at 120 °C.

Dimensions and mounting:

Envelope: 17 x 30 x 7 mm per bearing. The rings are universally ground, so the pair mounts back-to-back, face-to-face or in tandem and develops the specified heavy preload in any of those arrangements.

Compatibility and replacement:

Cross-Reference 1: SKF 71903 CD/P4ADGC, an SKF heavy preload set. Cross-Reference 2: Fafnir 2MM9303WI-CR-DUH, the Fafnir number for the same set. Cross-Reference 3: NSK 7903CTRDUHP4, an NSK heavy preload number. Cross-Reference 4: SKF 71903 CD/P4ADGA or DGB, light or medium preload. Cross-Reference 5: 71903 ACD / 7903 A5 / 3MM9303WI, 25° contact angle. A DUL or DUM suffix denotes light or medium preload, which is a different rigidity.

Frequently asked questions:

What are the dimensions of the SNFA SEB17-7CE1DUH?

Bore Diameter: 17 mm. Outside Diameter: 30 mm. Width: 7 mm per bearing, 14 mm across the mounted pair.

What does DUH mean in SEB17-7CE1DUH?

DUH is a duplex universal set at heavy preload. The rings are universally ground, so the pair mounts back-to-back, face-to-face or in tandem.

What contact angle does the SEB17-7CE1DUH have?

Contact Angle: 15°, marked CE1 in the SNFA designation.