Barden124HDLMatched Duplex Angular Contact Ball Bearing Pair – Straight Bore, 120 mm ID, 180 mm OD, 28 mm Width, Open, 15° Contact Angle, Light Preload, P4.

Product Description

What this part is

Barden 124HDL super-precision angular contact ball bearing, supplied as a matched duplex pair. Bore: 120 mm. Outside diameter: 180 mm. Width: 28 mm per bearing. Contact angle: 15°. Precision class: P4, equivalent to ABEC 7. Open on both faces. Weight: 5.30 lb per bearing. ISO equivalent size: 7024.

Decoding the designation

124: Barden bore code for 120 mm. H: matched duplex set. DL: duplex, light preload. Barden bore codes step in fives from 116, which is 80 mm, so 124 is 120 mm and the part sits on the ISO 7024 envelope.

What these specs mean in practice

Dynamic load rating: 88 kN (19,800 lbf). Static load rating: 93 kN (20,900 lbf). Limiting speed: 8,500 rpm. Maximum operating temperature: 120 °C. A 15° contact angle favours speed and radial stiffness over thrust capacity. Light preload keeps heat generation and torque low while still removing the play that lets a spindle chatter. The machined phenolic cage is light in mass and holds oil in its own surface.

Quantity and configuration

Two bearings, ground as a matched duplex light-preload set. Supplied new, sealed in the factory bag, with the preservative oil film on the raceways.

Fitting notes

Shaft seat to h5 and housing bore to H6 or closer hold the P4 running accuracy. The ground ring faces set the preload when the rings are clamped evenly, with no spacer grinding.

Interchange guidance

Same-specification 15° light-preload executions: SKF 7024 CD/P4ADGA, FAG B7024-C-T-P4S-DUL, NSK 7024CTRDULP4, Fafnir 2MM9124WI-CR-DUL. Punctuation variants: 124HDL, 124 H DL, 124-H-DL, 124H DL.