The Shigiya GPH-20 is a compact cylindrical grinder designed for high-precision internal and external grinding of small to medium-sized components. It delivers consistent, repeatable accuracy through a rigid machine structure, precise spindle control, and stable thermal performance over long production runs. As a result, the GPH-20 supports reliable machining of tight-tolerance parts while maintaining predictable grinding quality.
The GPH-20 is a compact yet robust CNC cylindrical grinder designed to meet the growing demands of high-precision, small-part production. While its footprint is minimal, the machine offers serious capability. Its solid construction ensures stability, while the control system delivers reliable performance every time. Because this CNC cylindrical grinder supports high-speed operation and tight tolerances, it fits well into medical, aerospace, and electronics shops where small parts demand big precision.
The GPH-20 delivers consistent results as a high-precision grinding machine, even across extended production runs. Its high-rigidity wheel head, thermally stable frame, and servo-driven table provide excellent repeatability and finish quality. Furthermore, this high-precision grinding machine simplifies setup while allowing for tight control of part geometry. Shops that rely on micron-level accuracy will find the GPH-20 to be a valuable long-term investment.
One of the GPH-20’s key advantages is its inclusion of manual feed hand wheels. These hand wheels allow operators to make fine adjustments during low-volume or prototype grinding. In addition, the manual feed hand wheels offer tactile control during setup without compromising CNC automation. For small shops or mixed-production environments, this flexibility makes the GPH-20 a smarter, more versatile choice.
With full CNC capability and automation readiness, the GPH-20 supports a wide range of automated grinding solutions. It integrates easily with robotic loaders, conveyors, and in-line part handling systems. These automated grinding solutions allow manufacturers to reduce labor costs, improve consistency, and increase output. Whether operating in single-shift or lights-out environments, the GPH-20 supports modern production goals.
The GPH-20 excels as precision machining equipment tailored for delicate geometries and high-tolerance applications. It provides accurate control across the entire grinding cycle. Moreover, as a small parts grinding machine, it handles fine-featured components with confidence. Whether producing medical pins, bearing races, or small shafts, the GPH-20 delivers accuracy, repeatability, and long-term reliability.
Metric
| Specifications | Units | |
|---|---|---|
| Swing Over Table | mm | 200 |
| Distance Between Centers | mm | 250, 500 |
| Weight Capacity | kg | 20 |
| Machine Weight | kg | 1800 / 2000 |
| Wheel Size OD | mm | 355 |
| Wheel size width | mm | 50 |
| Wheel spindle | KW | 2.2 / 3.7 |
Standard
| Specifications | Units | |
|---|---|---|
| Swing Over Table | inch | 7.87 |
| Distance Between Centers | inch | 9.84 / 19.69 |
| Weight Capacity | lbs | 44.09 |
| Machine Weight | Ibs | 3968.32 / 4409.25 |
| Wheel Size OD | inch | 13.98 |
| Wheel size width | inch | 1.97 |
| Wheel spindle | HP | 2.95 / 4.96 |
The Shigiya GPH-20 is a high-accuracy CNC cylindrical grinder for stable production grinding where slide control, roundness, and long-cycle consistency are critical. A.W. Miller Technical Sales supplies and supports Shigiya grinding equipment throughout New York, Pennsylvania, Maryland, Delaware, Southern New Jersey, and Quebec, with application engineering, installation, training, and factory-certified service.
The 20-class GPH platform is selected by swing and work length, then configured around wheel, support, gauging, and dressing requirements. The usable capacity must include centers, chuck or drive hardware, and any in-process gauge. Final machine selection should be based on the complete workpiece, stock allowance, tolerance, surface finish, wheel and dressing package, workholding, gauging, coolant system, automation target, and production rate.
Applications commonly evaluated for the Shigiya GPH-20 include:
Controlled wheel infeed and table motion support roundness, straightness, and size consistency over repeated production cycles.
Warm-up, coolant temperature, in-process gauging, wheel wear compensation, and dressing frequency must be planned as one accuracy system.
Abrasive type, grade, bond, wheel dimensions, dress form, and dressing interval must be matched to material, stock allowance, finish, and cycle time. The GPH-20 process should be validated with the complete wheel and coolant package.
Centers or chucking, drive method, support, coolant filtration, temperature control, and gauge strategy determine whether the GPH-20 can hold the required size, roundness, cylindricity, and surface finish through production.
The difference is not limited to nominal swing. Center distance, grinding diameter, supported mass, wheel size, machine footprint, loading method, and available options may change, so both models should be compared against the same representative part family.
It can be configured for precision grinding, but achievable capability depends on part geometry, support, stock, wheel condition, thermal control, setup, and measurement. A process study should define the expected tolerance distribution.
Options may include grinding between centers, chucking, special arbors, center-drive arrangements, steady rests, and dedicated fixtures. Selection follows the part datums, drive torque, accessibility, distortion risk, and finished-surface protection.
In-process gauging is valuable when wheel wear, thermal drift, incoming stock, or long unattended runs could move size outside the required range. Gauge location and compensation logic must be compatible with the feature and cycle.
Provide the full print, material and hardness, starting diameters, stock allowance, grinding lengths, tolerance, finish, wheel specification, dress method, loading time, gauge steps, spark-out, and annual volume.