The Internal Series (ISP’s) O-ring installation machines are a high speed solution that automatically orients, feeds, and installs O-rings internally with accurate placement. The machines have a compact, benchtop convenience, eliminate quality problems, and reduce production times with some having speeds up to 1800 parts per hour depending on operator efficiency. The machines have right or left hand configuration availability that can readily accommodate various O-ring sizes with a quick change tooling ability. The PLC controlled machines can be custom designed to easily integrate into new or existing automated production lines.