Wikipedia
An arbor press is a small hand operated press. It is typically used to perform smaller jobs, such as staking, riveting, installing and removing bearings and other press fit work. Punches, inserters, or other tools/dies may be added to the end of the ram depending on the desired task. Arbor presses are usually rated by the maximum load they can apply. Typically common are presses with a leverage of 1–5 tons. This leverage is achieved when a force is applied to the lever arm or wheel.
Some machinists disparage their use for the pressing of arbors (for which they presumably were named), preferring other methods, such as freezing followed by tapping into place with a rubber hammer.
Usage examples of "arbor press".
Ted Eddings had equipped a small bedroom with an arbor press, digital scale, case trimmer, reloading dies and everything else needed to keep him in cartridges.