Timken 312WDN 6312 Radial Ball Bearing Collectible

Bearing for display or study

This Timken 312WDN radial ball bearing carries industry number 6312 and is offered new as a collectible piece. The single-shielded design shows one side open while the opposite face retains its factory shield. Alloy-steel rings and balls present a transparent finish that highlights the internal geometry. Collectors of industrial components or students of mechanical design can examine a genuine production bearing without putting it into service.

Capacity and headroom

The bore measures 60 mm and the outside diameter 130 mm with an outer ring width of 31 mm, giving a compact envelope for a 6312 series unit. Dynamic radial load capacity is rated at 119,800 N, so the bearing can theoretically sustain heavy radial forces in a live application. ABEC 1 tolerance and a bore tolerance of +0/-0.015 mm indicate standard precision rather than high-accuracy grades. The Quaker Ferrocote lubricant and steel cage complete the factory specification.

Metric 6312 interface limits

Metric dimensions lock this bearing to shafts and housings machined to the 6312 standard, so it cannot swap into inch-series bores or other metric series without modification. The single shield retains lubricant on one side but leaves the opposite raceway exposed to contamination, limiting use in dirty environments. A fillet radius of 2.11 mm dictates the maximum corner radius on the shaft or housing shoulder. No retaining ring is included, so axial location must be provided by separate hardware.