Barden124HDL-1/2PRAngular Contact Ball Bearing — 120 mm ID, 180 mm OD, 28 mm Width, 15° Contact Angle, ABEC 7 / P4S, Light Preload

Product Description

What this part is

The Barden 124HDL-1/2PR is a single super precision angular contact ball bearing in the metric 100 H series, built for machine tool spindles. It measures 120 mm bore, 180 mm outside diameter and 28 mm wide, with a 15° contact angle and ABEC 7 / P4S precision. It is one bearing from a universal-ground, light-preload pair.

Decoding the designation

124 — Metric 100 series, bore code 24, 120 mm bore; ISO equivalent 7024C.

H — Spindle angular contact design, non-separable, relieved outer ring, with a one-piece reinforced phenolic halo cage guided on the outer ring.

D — Universal mounting: inner and outer rings are ground to the same width, so the bearing installs back-to-back (DB), face-to-face (DF) or tandem (DT) with a matching universal bearing.

L — Light standard preload.

-1/2PR — Half pair: one bearing from a universal duplex set.

What these specs mean in practice

Bore Diameter: 120 mm. Outside Diameter: 180 mm. Overall Width: 28 mm. These match the ISO 7024 envelope, so the bearing fits housings dimensioned for that size.

Contact Angle: 15°. The shallow angle favours high speed and radial stiffness over maximum axial load.

Dynamic load rating: 116,683 N. Static load rating: 136,147 N. These ratings set the fatigue life and static overload limit of the bearing.

Limiting Speed: 8,000 rpm grease; 12,000 rpm oil. Oil lubrication supports the higher figure.

Preload: Light (L), 755 N standard preload. Light preload keeps heat generation low at spindle speed.

Cage Material: Phenolic. The light, outer-ring-guided halo cage carries lubricant and runs quietly at high speed.

Precision Class: ABEC 7 / P4S. P4S combines ABEC 7 dimensional tolerances with ABEC 9 running accuracy for low spindle runout.

Bearing Material: 100Cr6 (SAE 52100) chrome steel rings, steel balls. This is the standard through-hardened bearing steel for precision spindles.

Mounting data

Maximum fillet radius r1 is 2.00 mm. Maximum fillet radius r2 on the non-thrust side is 1.00 mm.

Quantity and configuration

The listing is 1 bearing, one half of a universal duplex (D) light-preload set. Pairing with another universal 124HDL bearing gives a DB, DF or DT arrangement. Barden standard preload range for this size is Light 755 N, Medium 1,865 N and Heavy 3,735 N.

Interchange guidance

FAG B7024C.T.P4S, SKF 7024 CD/P4A, NSK 7024C P4 and Timken Fafnir 2MM9124WI share the same 120 x 180 x 28 mm envelope and 15° contact angle. Barden lists FAG B7024C.T.P4S as the FAG equivalent of the 124HC.