Barden118HDL-1/2PRAngular Contact Ball Bearing — 90 mm ID, 140 mm OD, 24 mm Width, 15° Contact Angle, ABEC 7 / P4S, Light Preload, Single Bearing

Product Description

What this part is

The Barden 118HDL-1/2PR is one super precision angular contact ball bearing from the Barden 100 H metric spindle series, supplied as a single bearing from a light-preload universal duplex set. The design is non-separable with a relieved outer ring, a 15° contact angle and a one-piece phenolic halo cage.

Decoding the designation

118 — base number: 100 series metric spindle bearing, bore code 18 = 90 mm bore.

H — reinforced phenolic cage, one-piece halo design, outer ring centred.

D — universal mounting: inner and outer rings of the same width, so the bearing installs DB, DF or DT.

L — light preload; no numerals follow, so Barden standard light preload applies.

-1/2PR — one half of a pair: a single bearing taken from the universal duplex set.

What these specs mean in practice

Bore Diameter: 90 mm. The bearing fits a 90 mm spindle journal.

Outside Diameter: 140 mm. The housing bore is sized to 140 mm.

Overall Width: 24 mm. Each bearing occupies 24 mm of axial space.

Contact Angle: 15°. The low angle favors high speed and radial stiffness over pure thrust capacity.

Dynamic load rating: 73,638 N. This figure sets the basis for fatigue life calculation.

Static load rating: 78,150 N. This is the load limit before permanent raceway deformation at rest.

Limiting Speed: 11,000 rpm grease; 16,000 rpm oil. Oil lubrication raises the usable speed ceiling.

Preload: Light (L), 485 N standard preload. Light preload keeps heat generation low at high spindle speeds.

Cage Material: Phenolic. The light, outer-ring-guided halo cage suits high-speed running.

Precision Class: ABEC 7 / P4S. P4S combines ABEC 7 dimensional tolerances with ABEC 9 running accuracy.

Bearing Material: 100Cr6 (SAE 52100) chrome steel rings, steel balls. Through-hardened chrome steel is the standard for spindle-grade bearings.

Mounting data

Maximum fillet radius r1 is 0.76 mm; maximum fillet radius r2 on the non-thrust side is 0.30 mm.

Quantity and configuration

This listing is one bearing. It is one half of a universal duplex (D) set with light preload, and the 485 N standard preload is achieved when it is mounted against another Barden universal light-preload bearing of the same size.

Interchange guidance

The ISO designation for this envelope and angle is 7018C. Barden lists FAG B7018C.T.P4S as the FAG equivalent. SKF 7018 CD/P4A, NSK 7018C P4 and Timken Fafnir 2MM9118WI share the same 90 x 140 x 24 mm envelope and 15° contact angle.