Definition
A small, hand-operated mechanical press used in aircraft maintenance shops to apply controlled, straight-line force to a workpiece, typically for installing or removing press-fit parts such as bearings, bushings, pins, and small fittings.
Plain English
A bench-mounted tool with a long handle that pushes a metal ram straight down to press parts in or out — like a tight-fitting bearing into a wheel hub.
Context Anchor
Seen in aircraft maintenance shops when a mechanic needs controlled force to install or remove small fitted parts.
Derivation
An 'arbor' is a shaft or spindle that holds or supports a workpiece. The tool gets its name because the ram acts on (or through) the arbor that the part is mounted on.
Why Pilots Care
Maintenance technicians rely on the arbor press for clean, square installation of press-fit parts. Forcing these parts in with a hammer can damage the part, the housing, or both — so the press protects component integrity and airworthiness.
Grounding Statement
Picture a mechanic placing a small part under a straight-moving metal ram, then pulling a handle so the ram pushes the part into place smoothly.
Intuition Check
An arbor press is not a printing press or a general paperwork press. In aircraft maintenance, it is a shop tool for applying straight, controlled force to mechanical parts.
Example Sentence 1
The technician used the arbor press to seat a new bushing into the control arm.
Example Sentence 2
Using the arbor press, the mechanic removed the damaged bushing from the control surface hinge without distorting the surrounding metal.