Barden107HDHSuper-Precision Angular Contact Ball Bearing Pair – 35 mm ID, 62 mm OD, 14 mm Width Each, Open, 15° Contact Angle, Heavy Preload, Phenolic Cage

Product Description

What this part is

Barden 107HDH super-precision angular contact ball bearing set. Bore: 35 mm. Outside diameter: 62 mm. Width: 14 mm per bearing. Contact angle: 15°. Preload: heavy. Precision Class: ABEC 7 / P4. ISO equivalent section: 7007. Open, machined phenolic cage, straight bore. Country of origin: United States.

Decoding the designation

Barden series 107 corresponds to the ISO 7007 section, 35 x 62 x 14 mm. HD: matched duplex, ground for universal mounting. H: heavy preload grade. Carton also marked HCDUH and DUM. Contact angle: 15°.

What these specs mean in practice

Dynamic load rating: 19.3 kN. Static load rating: 12.9 kN. Limiting speed: 24 000 rpm. A 15° contact angle favours speed and radial stiffness over axial capacity, which is what puts this bearing on grinding and high-speed milling spindles. Heavy preload gives the stiffest shaft location and the highest resistance to deflection under cutting load, at the cost of more running friction and more heat than a light or medium grade — which is why heavy-preload sets are usually run with circulating or mist oil. A machined phenolic cage is light, self-lubricating and quiet, and it is the cage that makes speeds of this order practical; it is rated to around 120 °C.

Quantity and configuration

Two pieces, a matched duplex pair. Each bearing measures 35 x 62 x 14 mm; stacked width across the pair is 28 mm. Ground for universal mounting, so the pair can be set back-to-back, face-to-face or in tandem, and the heavy preload is achieved when the pair is clamped.

Fitting notes

Matched bearings are kept together and mounted with the marked faces oriented per the arrangement chosen. Shaft and housing fits are held light on a super-precision bearing, since an interference fit adds to the preload ground in at the factory. A heavy-preload pair benefits from generous lubrication and a housing that carries heat away. Clean assembly practice suits the ABEC 7 class.

Interchange guidance

SKF 7007 CD/P4 and NSK 7007CTYNSULP4 cover the same 35 x 62 x 14 mm envelope at the same 15° contact angle and P4 class; preload grade and cage material differ between them, so they are matched on envelope and angle rather than on preload. Barden 107HDL and 107HDM are related sizes at light and medium preload. Searchable forms: 107HDH, 107-HDH, 107 HDH, 107HDH set, HCDUH, DUM, 7007.