The Shigiya GP-55D is a heavy-duty cylindrical grinder built for high-precision grinding of larger, high-mass components. It delivers stable, repeatable accuracy through a rigid machine structure, controlled thermal performance, and consistent grinding behavior during extended production cycles. As a result, the GP-55D supports reliable throughput while maintaining tight tolerances and consistent part quality in demanding manufacturing environments.
The GP-55D is a robust CNC cylindrical grinder built for precision, power, and flexibility. Designed to accommodate medium to large workpieces, it offers stable performance in demanding grinding environments. Its CNC control platform supports complex grinding cycles while reducing setup time and operator input. Because of its reliable architecture, this CNC cylindrical grinder is ideal for high-volume manufacturers who need consistent part geometry and process repeatability.
Positioned as a medium-duty cylindrical grinder, the GP-55D provides an ideal balance between rigidity and responsiveness. It handles medium-sized components with ease, offering precise control over diameter, roundness, and surface finish. In addition, this medium-duty cylindrical grinder is engineered for daily use, delivering repeatable results in automotive, general machining, and industrial sectors. Its robust construction reduces vibration, ensuring consistent part quality during extended production runs.
Engineered for detail, the GP-55D performs as a high-precision grinding machine capable of holding tight tolerances on complex geometries. Its high-rigidity base, precision spindle, and servo-driven axes ensure stable performance at high speeds. As a high-precision grinding machine, it enables shops to meet demanding specifications across diverse part shapes and materials, including hardened steels and alloys.
The GP-55D also functions as a versatile CNC grinder, adapting easily to a wide range of part configurations. Whether grinding long shafts, bearing journals, or hydraulic components, this machine delivers reliable accuracy across multiple setups. Moreover, its CNC flexibility and customizable tooling make this versatile CNC grinder suitable for both batch runs and one-off jobs.
The GP-55D is built to support heavy-duty grinding solutions without sacrificing precision. Its durable design enables continuous operation, even in harsh environments. By integrating into larger grinding cells, it contributes to heavy-duty grinding solutions that improve throughput while maintaining surface integrity. This makes it a long-term asset for high-volume manufacturing.
Metric
| Specifications | Units | |
|---|---|---|
| Swing Over Table | mm | 550 |
| Distance Between Centers | mm | 950, 1450, 2150, 3000, 4950, 5950 |
| Weight Capacity | kg | 1000 |
| Machine Weight | kg | 6900 / 7600 / 8600 / 9700 / 11200 / 12700 |
| Wheel Size OD | mm | 610 / 760 |
| Wheel size width | mm | 130* |
| Wheel spindle | KW | 11 / 15 |
Standard
| Specifications | Units | |
|---|---|---|
| Swing Over Table | inch | 21.65 |
| Distance Between Centers | inch | 37.41 / 57.09 / 84.65 / 155.51 / 194.89 / 234.25 |
| Weight Capacity | lbs | 2204.62 |
| Machine Weight | Ibs | 15211.9 / 16755.13/18959.75 /21384.84 / 24691.77 / 27998.71 |
| Wheel Size OD | inch | 24.02 / 29.92 |
| Wheel size width | inch | 5.12* |
| Wheel spindle | HP | 14.75 / 20.12 |
The Shigiya GP-55D is a large CNC cylindrical grinder for programmable OD grinding on large-diameter and long components. 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 55-class GP-D platform is part of Shigiya’s large table-traverse range. Published GP-65/85/100D data covers 650, 850, and 1,000 mm swing classes, center distances extending to several meters, loads up to 3,000 kg, and a 915 mm grinding wheel. 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 GP-55D include:
CNC wheelhead and table control coordinate multiple diameters, shoulders, and traverse zones across long, heavy parts.
Center load, drive torque, steady-rest placement, and crane access must be developed around the real shaft rather than maximum catalog dimensions alone.
Abrasive type, grade, bond, wheel dimensions, dress form, and dressing interval must be matched to material, stock allowance, finish, and cycle time. The GP-55D 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 GP-55D can hold the required size, roundness, cylindricity, and surface finish through production.
The 55-class GP-D platform is part of Shigiya’s large table-traverse range. Published GP-65/85/100D data covers 650, 850, and 1,000 mm swing classes, center distances extending to several meters, loads up to 3,000 kg, and a 915 mm grinding wheel. The correct size is the smallest configuration that clears the complete part and workholding while meeting load, wheel, and process requirements.
Yes, when the wheel access, program, work support, and gauge plan allow it. Each diameter and shoulder must be checked for collision, stock condition, wheel form, dwell, traverse direction, and dressing demand.
Automation may include loading, chuck or center confirmation, in-process gauging, wheel dressing, part washing, and discharge. A stable manual process should be proven before unattended recovery logic is finalized.
Wheel specification and condition, dress parameters, work speed, traverse or plunge rate, spark-out, coolant delivery, vibration, and incoming stock all affect finish. A slower feed alone does not correct an unstable grinding system.
Flow, pressure, temperature stability, nozzle placement, filtration level, tank capacity, and material contamination must support both the wheel and tolerance. The coolant system should be treated as part of the machine process.