NSKHR33010JDBP5+KL7CP45Matched DB Tapered Roller Bearing Pair, 50 mm ID, 80 mm OD, P5

Product Description

What this part is:

NSK HR33010JDBP5+KL7CP45 is a factory-matched pair of metric single-row tapered roller bearings, supplied as a back-to-back DB set with a ground spacer ring. Bore Diameter: 50 mm. Outside Diameter: 80 mm. The rings and the spacer are ground together as a unit to produce a specified preload.

Composition: five pieces per set — two cones (inner rings with roller and cage assemblies), two cups (outer rings) and one ground spacer ring. Ring markings read NSK HR 33010J with the DBP5 pairing mark; the carton is labelled HR33010JDBP5+KL7CP45, lot 406, with the original NSK inspection slip.

Decoding the designation:

HR — NSK’s high-capacity tapered roller design. Larger and longer rollers in the same envelope than the base metric series, so the load rating rises without a dimensional change.

33010 — ISO metric tapered roller size designation: 50 mm bore, 80 mm outside diameter.

J — pressed steel cage.

DB — back-to-back arrangement. The two cup backfaces sit together, so the effective load lines diverge outward.

P5 — ISO precision class 5, equivalent to ABEC 5. Two grades tighter than standard P0/ABEC 1 on bore, outside diameter, and on radial and axial runout.

+KL7CP45 — the matched spacer element supplied with the pair. The plus sign in NSK nomenclature denotes an accompanying component ground to suit.

Specifications:

Bearing Type: Tapered Roller Bearing, matched pair. Bore Diameter: 50 mm. Outside Diameter: 80 mm. Width: 24 mm (ISO series dimension for the 33010 size). Number Of Rows: 2 per set. Cage: pressed steel (J). Precision Class: P5 (ISO class 5 / ABEC 5). Arrangement: DB, back-to-back, matched with ground spacer. Preload: set by the ground spacer. Series: 33010 ISO metric tapered roller series, NSK HR design. Unit Quantity: 1 matched set (two cones, two cups, one spacer).

Dimensions and mounting:

Bore: 50 mm shaft. Outside diameter: 80 mm housing bore. Arrangement: DB, back-to-back. The two rows’ load lines spread apart as they travel outward, giving the pair a wide effective support span and moment stiffness from a single short bearing position. Face-to-face (DF) pairs converge their load lines to a narrow span.

Compatibility and replacement:

Written variously as HR33010JDBP5+KL7CP45, HR33010J DB P5, HR33010JDB, HR33010J, HR 33010 J, 33010J and 33010. The base ISO size designation 33010 is shared across manufacturers on the 50 x 80 mm envelope. The matched DB P5 set with a ground spacer has its own precision class and preset preload. Applications: machine tool spindles, rotary tables, worm gear reducers and precision indexing heads.

Frequently asked questions:

What is the NSK HR33010JDBP5+KL7CP45?

A factory-matched back-to-back (DB) set of two NSK HR33010J tapered roller bearings with a ground spacer ring, five pieces per set, to P5 precision.

What size is the HR33010J?

50 mm bore, 80 mm outside diameter, 24 mm width.

What does P5 mean in the designation?

ISO precision class 5, equivalent to ABEC 5: two grades tighter than standard P0/ABEC 1 on bore, outside diameter, and radial and axial runout.