The techniques cultivated on the small diameter have been directly inherited, entering the medium diameter processing field. Honing processing for φ50 to φ80 is possible!
The newly released "G75 model" is a honing machine that transforms the image of "Nisshin Seisakusho as the go-to for small diameter honing," accommodating larger processing diameters of φ50 to φ80 compared to the G25 and G50 models. It achieves high productivity in parts processing for industries such as motorcycles, construction machinery, and trucks, where demand has been increasing recently. In addition to being high-performance and high-precision, it emphasizes electronic control over hydraulic systems from an environmental perspective and adopts a mechanical double expansion (servo control). This equipment responds to the strong requests from customers who want to process larger holes with Nisshin Seisakusho's honing technology. As a comprehensive manufacturer of honing machines, Nisshin Seisakusho selects the machine body, tools, grinding wheels, and jigs comprehensively with its unique know-how to achieve ultra-precision processing. We have received high evaluations as a leading Japanese manufacturer from customers in the automotive industry, including injection pumps, motorcycles, construction machinery, hydraulic and pneumatic systems, home appliances, molds, general-purpose engines, and sewing machine industries.
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basic information
Covers processing diameters from φ50 to φ80, with a processing length of up to 100mm. Achieves high-efficiency processing through mechanical double expansion and air in-process measurement. Integrates rough machining, finishing machining, and air micro into a single tool, enabling process consolidation. This allows for compact equipment design. Adopts mechanical double expansion (servo-controlled). The expansion method (constant volume or constant pressure) can be selected, allowing for processing tailored to product characteristics (hole shape and machining accuracy). Constant pressure expansion facilitates plateau honing. Inherits the following management systems developed with small-diameter honing machines: - Up to 30 types of processing programs and tool information - Management of various counters - Cycle time management - Processing torque and measurement value management - Maintenance guide and maintenance history - Automatic grinding wheel extension function The photo shows the G75-MM1. Depending on the processing length and conditions, the maximum speed may not be achievable, and the processable length may also be limited by the required processing accuracy. This specification may change without notice for product improvement, so please feel free to contact us for detailed functionality.
Price information
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Delivery Time
※Delivery dates may vary depending on specifications, so please feel free to contact us.
Applications/Examples of results
Cylinders, connecting rods, barrels, nozzles, various gears, turbos, compressors, stator cores, hydraulic parts, pneumatic parts, ceramic parts, power steering, etc. We have received high praise from various customers in the automotive industry, motorcycles, construction machinery, hydraulic and pneumatic sectors, home appliances, general-purpose engines, sewing machine industry, etc., for our inner diameter finishing processes, including injection pumps. Please feel free to contact us regarding pricing and delivery times.
Detailed information
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- Multiple processes can be consolidated with the "Double Expansion Tool" - By adopting the "Double Expansion Tool," which can handle both rough and finishing processes with a single tool, it is possible to perform machining that previously required separate tools for each process with just one tool, thus reducing "tool change time." Furthermore, by reducing the number of machining stations, it also contributes to the "compactness of equipment." The tool features controls that allow for the selection of quantitative and constant pressure machining according to the desired hole shape and machining accuracy, and it is equipped with functions that support air-in-process measurement. *This tool is specifically designed for the G75 type honing machine.*
Line up（4）
| Model number | overview |
|---|---|
| G25-MM2 | Super precision! Stability! A versatile model ideal for mass production at a reasonable cost. |
| G25-MR2 | Super precision! Stability! A versatile model that enhances productivity with a rotary table. |
| G50L-MM1 | Easy realization for long-length processing! Long stroke model. |
| F25G-M2DR | Flexible production changes! A cell model that adapts to production fluctuations according to purpose. |
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Company information
Our company is a comprehensive manufacturer of ultra-precision honing machines based in Kyotango City, Kyoto Prefecture. Founded in 1946 as a specialized manufacturer of sewing machine parts, we have since made continuous efforts in the production of various precision machine parts (industrial sewing machine parts, engine parts for automobiles and motorcycles, etc.) and machine tools (vertical automatic honing machines, special grinding machines, etc.), supplying numerous products to the industrial sector. Nisshin ProSOL's unique honing technology, leveraging precision machining techniques, contributes to the rationalization, labor-saving, and high precision of manufacturing processes across diverse industries through proactive expansion into global markets. We changed our company name in April 2025.