The Shigiya G-20 is a compact cylindrical grinder that delivers consistent, high-accuracy results without unnecessary complexity. It combines rigid construction, thermal stability, and intuitive controls to support tight tolerances and repeatable performance. As a result, the g-20 integrates smoothly into production environments that prioritize precision, reliability, and efficient use of floor space.
The Shigiya G-20 is a compact hydraulic cylindrical grinder ideal for high-accuracy grinding in toolrooms and small-batch manufacturing setups. Its streamlined design simplifies daily use, while its strong build ensures consistent performance. Operators can easily control grinding functions through manual adjustments, allowing for precise results without the complexity of automated systems.
This compact grinding machine is built with a swing over table of 200 mm (7.87 inches) and distances between centers of either 250 mm or 500 mm (9.84 or 19.68 inches). As a result, the G-20 can handle parts weighing up to 44 lbs (20 kg), offering versatility for many workpiece sizes and grinding needs.
Unlike large CNC machines, the G-20 offers hands-on grinding control, making it an excellent fit for toolrooms and repair facilities. Since it operates manually, users can feel each step of the grinding process. This tactile feedback helps maintain precision and shortens the learning curve for new operators.
Furthermore, the G-20 doesn’t take up much space. That makes it perfect for crowded work areas or smaller shops where every inch counts. The machine also handles both rough and fine grinding jobs, which means it can serve multiple functions in one location.
This small precision grinder offers a solid frame that resists vibration. Because of this, it delivers stable, smooth grinding operations. It’s easy to maintain, thanks to its hydraulic system, and its design reduces the chance of wear over time. As a result, the G-20 keeps delivering quality finishes on tools and parts with minimal maintenance.
Its layout also keeps critical components within easy reach for quicker setups and faster changes between grinding jobs. In toolrooms where turnaround time matters, this machine adds measurable value.
The Shigiya G-20 fits best in places where fast, precise grinding is needed—without the hassle of programming. Common uses include sharpening tools, modifying fixtures, or finishing precision parts. Its size and simple interface also make it a great teaching tool in trade schools and technical programs.
Additionally, teams in maintenance or prototyping can rely on this machine for consistent results on a wide range of materials. That flexibility ensures it supports ongoing operations without adding complexity.
Metric
| Specifications | Units | |
|---|---|---|
| Swing Over Table | mm | 200 |
| Distance Between Centers | mm | 250, 500 |
| Weight Capacity | kg | 20 |
Standard
| Specifications | Units | |
|---|---|---|
| Swing Over Table | inch | 7.87 |
| Distance Between Centers | inch | |
| Weight Capacity | lbs | 44.09 |
The Shigiya G-20 is a general-purpose cylindrical grinder for straightforward external grinding of shafts, journals, and stepped diameters. 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 platform identifies the workpiece swing family, while center distance, wheel specification, workhead, tailstock, and feed configuration depend on the selected model. The application must be checked against maximum grinding diameter and supported mass rather than model number alone. 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 G-20 include:
The straightforward wheelhead and table arrangement supports OD diameters, journals, tapers, and shoulders without unnecessary process complexity.
Centers, chucking, drive hardware, and dressing can be changed around different shaft families while maintaining an accessible setup process.
Abrasive type, grade, bond, wheel dimensions, dress form, and dressing interval must be matched to material, stock allowance, finish, and cycle time. The G-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 G-20 can hold the required size, roundness, cylindricity, and surface finish through production.
The 20-class platform identifies the workpiece swing family, while center distance, wheel specification, workhead, tailstock, and feed configuration depend on the selected model. The application must be checked against maximum grinding diameter and supported mass rather than model number alone. 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.