NHBBME-21907DLSuper-Precision Angular Contact Ball Bearing Matched Pair – Straight Bore, 35 mm ID, 55 mm OD, 10 mm Width, Open, 25° Contact Angle, Light Preload, Phenolic Cage, ABEC 7

Product Description

What this part is:

The NHBB ME-21907DL is a duplex matched pair of super-precision angular contact ball bearings in the thin 719 dimension series. Unit Quantity: 2 Pcs, one matched pair. Bore Diameter: 35 mm (1.3780 in). Outside Diameter: 55 mm (2.1654 in). Width: 10 mm per bearing; Total Width: 20 mm across the pair. Contact Angle: 25°. Both bearings are open.

Decoding the designation:

ME-21907 — NHBB number for the MER-1907 envelope, 35 x 55 x 10 mm.

DL — duplex universal set at light preload.

71907-E-TPA-P4-DUL — ISO-form designation on the carton: E is 25°, TPA is a fabric-base phenolic laminate cage, P4 is ABEC 7, DUL is a duplex universal set at light preload.

3MMV9307WI-CR-DUL — Fafnir form on the carton: 3MM is 25°, the 9300 series maps to ISO 719, CR is a phenolic outer-land-riding cage.

71907 A5 TR — NSK form on the carton: A5 is 25°, TR is an outer-ring-guided phenolic cage.

Specifications:

Dynamic Load Rating: 14,200 N (3,200 lbf) per bearing. Static Load Rating: 10,900 N (2,450 lbf) per bearing. Precision Class: P4 (ABEC 7). Preload: Light (DUL). Cage Material: Fabric-base phenolic laminate. Cage Type: Outer-ring guided. Bearing Material: 52100 chrome steel. Rolling Elements: 18 balls per bearing, 1/4 in diameter. Number Of Rows: 1 per bearing. Bore Type: Straight. Closure Type: Open. Series: NHBB ME-21900 metric angular contact, ISO 71907, 719 dimension series. Source: NHBB metric angular contact catalogue, MER-1907.

Dimensions and mounting:

Maximum shaft or housing fillet radius: 0.024 in. Inner land diameter: 1.644 in. Outer land diameter: 1.942 in.

Compatibility and replacement:

Cross-references: SKF 71907 ACDGA/P4A; NSK 71907A5TRDULP4 (pair); Fafnir/Timken 3MMV9307WI-CR-DUL; NHBB MER-1907 (single-bearing catalogue number). 71907 CD, 71907 C and 2MM9307WI are 15° bearings on the same envelope.

Frequently asked questions:

What are the dimensions of the NHBB ME-21907DL?

Each bearing is 35 mm bore, 55 mm outside diameter and 10 mm wide. The pair is 20 mm wide in total.

What is the contact angle and preload?

The contact angle is 25°. DL and DUL denote a duplex universal set at light preload.

What are the load ratings?

Per bearing, the NHBB catalogue gives Dynamic Load Rating 14,200 N (3,200 lbf) and Static Load Rating 10,900 N (2,450 lbf).