Deep Groove Ball Bearings SKF 61864 MA

SKF deep groove ball bearing 61864 MA: Open heavy-duty bearing with a 320 mm bore, 400 mm outer diameter and an externally mounted brass cage for demanding radial loads.

The 61864 MA deep groove ball bearing is a single-row large-diameter bearing made from standard roller bearing steel (100Cr6) for industrial applications involving large shaft diameters where radial installation space is limited. With an inside diameter of 320 mm and an outside diameter of 400 mm, whilst being just 38 mm wide, this open design primarily accommodates radial loads. The design is from SKF and complies with the standard tolerance class P0/PN (ABEC 1). It is suitable for machine mountings that require precise guidance in a controlled operating environment.

What is the 61864 MA deep groove ball bearing suitable for in heavy machinery engineering?

Design engineers opt for this design when large-diameter shafts need to be supported without unnecessarily increasing the housing dimensions. The open design allows direct connection to existing lubrication systems in industrial gearboxes and heavy machinery. As there are no integrated seals to generate friction, the bearing runs with low friction torque even at higher circumferential speeds. Smooth operation is possible within a temperature range of -20 to +150 degrees.

What is the function of the MA external brass cage?

The suffix ‘MA’ denotes a brass cage that is guided along the flanges of the outer ring. This guidance stabilises the rolling elements, particularly during rapid changes in speed and under high acceleration forces. Brass is characterised by favourable friction properties and mechanical strength. When planning the installation, please bear in mind that this component has a standard radial bearing clearance and that housing seals must provide protection against particles.