- A & D Centerless Grinding Inc
- Accurate Centerless Grinding
- Adapto Inc
- Airtronics
- Airtronics
- All Time Grinding Co
- Carbide Technology
- Chase Centerless Grinding Co
- Conn Centerless Grinding Co
- Crankshaft Corp
- Daniells Centerless Grinding
- Diamond Precision Products
- Diamond Precision Products
- Elmira Grinding Works Inc
- F B Manion & Sons
- Horberg Industries Inc
- Lake Grinding Co
- Perfection Centerless Grinding
- Pinto Manufacturing LLC
- Precision Grinding
- Quality Centerless Grinding
- Quality Grinding & Machining
- Rhode Island Centerless Inc
- Spencer Centerless Grinding Co
- United Centerless Grinding Co
- United Thread Rolling
- Winsted Centerless Grinding Co
- Wolfe Manufacturing Co
