Taiwanese Mill Drills badged as Naerok, Warco, Nu-Tools, Sealey,  Whitecote, Excel, Draper and Ajax, etc. . Although not machine-specific in content, it covers the the "Minor", "Major" and similar variants and, being a double-edition manual, it should help with most versions.

XYZ Machine Tools RF-30 Miller-Driller. Instruction Manual and Parts as Exploded Component Drawings.

RF-30 Miller-Driller. Instruction Manual and Parts as Exploded Component Drawings.