A
| Accu Trak | Knurling Tools |
| Advent | Thread mills |
| Akro-Mils | Industrial containers |
| Albrecht | Drill chucks |
| Allen Benjamin | Carbide taps |
| Allied Machine & Engineering | Spade drills |
| Alvord Polk | Aircraft quality reamers |
| Amada | Bandsaw machines & blades |
| American Carbide Tool | Carbide-tipped tool bits |
| Anderson | Power brushes & abrasives |
| ARC Abrasives | Abrasive specialties |
| Arno | Indexable insert tooling systems |
| Arno | Indexable cutoff & grooving system |
| Atco Precision | Sine plates & magnetic chucks |
| ATS | Collets, fixturing |
