The Heald Model 273A is a high-precision internal cylindrical grinder built for fine-tolerance bore grinding in hardened materials. Known for its rugged construction and exceptional spindle accuracy, this machine is suited for applications requiring high concentricity, superior finish, and tight bore tolerances. It’s widely used in aerospace, bearing, and precision tooling industries.
The 273A features a robust cast-iron base to dampen vibration, a precision workhead, and a high-speed internal grinding spindle. With hydraulic table feed and manual or automatic controls, it offers repeatable accuracy and consistent performance. Designed for versatility, the Heald 273A can handle both small and medium-diameter internal grinding jobs with remarkable precision.
Features & Options
Precision internal grinding for small to medium bores
Heavy cast-iron base for vibration stability
High-speed internal grinding spindle up to 45,000 rpm
Hydraulic table feed with fine manual control
Adjustable workhead speeds for optimal surface finish
Ideal for hardened steel, carbide, and precision components
Capable of achieving micron-level tolerances
Used widely in aerospace, bearing, and toolroom applications
Specifications are based on typical Heald 273A configurations. Always verify details with the machine’s nameplate or factory documentation.
Manufacturer: Heald
Model: 273A
Machine Type: Internal Cylindrical Grinder
Maximum Swing Inside Guard: 20″
Maximum Grinding Diameter: 10″
Maximum Grinding Depth: 10″
Workhead Spindle Speed: Variable, typically 100–400 rpm
Grinding Spindle Speed: Up to 45,000 rpm
Table Travel (Z-axis): ~20″
Feed System: Hydraulic with manual fine adjustment
Machine Weight: ~8,000 lb
Final Listing Price: Request Quote
