Barden214HDMAngular Contact Ball Bearing — 70 mm ID, 125 mm OD, 24 mm Width, 15° Contact Angle, ABEC 7 / P4S, Medium Preload

Product Description

What this part is

The Barden 214HDM is a super precision angular contact ball bearing set in the metric 200 H series, built for machine tool spindles. Each bearing measures 70 mm bore, 125 mm outside diameter and 24 mm wide, with a 15° contact angle and ABEC 7 / P4S precision. The set is two universal-ground bearings with medium preload.

Decoding the designation

214 — Metric 200 series, bore code 14, 70 mm bore; ISO designation 7214C.

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 bearings install back-to-back (DB), face-to-face (DF) or tandem (DT).

M — Medium standard preload.

What these specs mean in practice

Bore Diameter: 70 mm. Outside Diameter: 125 mm. Overall Width: 24 mm per bearing. These match the ISO 7214 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: 77,427 N. Static load rating: 70,024 N. These ratings set the fatigue life and static overload limit per bearing.

Limiting Speed: 11,000 rpm grease; 17,000 rpm oil. Oil lubrication supports the higher figure.

Preload: Medium (M), 1,155 N standard preload. Medium preload raises spindle stiffness over light preload at some cost in speed capability.

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 1.50 mm. Maximum fillet radius r2 on the non-thrust side is 0.76 mm.

Quantity and configuration

The listing is a set of 2 bearings, universal duplex (D), medium preload. The pair mounts DB, DF or DT. Barden standard preload range for this size is Light 440 N, Medium 1,155 N and Heavy 2,310 N.

Interchange guidance

FAG B7214C.T.P4S, SKF 7214 CD/P4A, NSK 7214C P4 and Timken Fafnir 2MM214WI share the same 70 x 125 x 24 mm size and 15° contact angle, but are single bearings rather than a preloaded duplex set. Barden lists FAG B7214C.T.P4S as the FAG match for the 214HC.