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Internal grinding machine Product List and Ranking from 13 Manufacturers, Suppliers and Companies | IPROS GMS

Last Updated： Aggregation Period:Jan 28, 2026～Feb 24, 2026
This ranking is based on the number of page views on our site.

Internal grinding machine Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Jan 28, 2026～Feb 24, 2026
This ranking is based on the number of page views on our site.

  1. セイコーインスツル 精密デバイス事業部 精機部 Chiba//Industrial Machinery
  2. 入野機工 Kanagawa//Industrial Machinery
  3. null/null
  4. 4 トーヨーエイテック Hiroshima//Automobiles and Transportation Equipment
  5. 5 和泉金属工業 Osaka//Industrial Machinery
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Internal grinding machine Product ranking

Last Updated： Aggregation Period:Jan 28, 2026～Feb 24, 2026
This ranking is based on the number of page views on our site.

  1. Universal Precision Internal Grinding Machine YIG-15-SA 入野機工
  2. Universal Precision Internal Grinding Machine YIG-20-MSA (Internal grinding for diameters of 8φ or less) 入野機工
  3. Internal Grinding Machine "KN-113B" 和泉金属工業
  4. Universal Precision Internal Grinding Machine YIG-20-M 入野機工
  5. 5 Internal Grinding Machine SIG03α セイコーインスツル 精密デバイス事業部 精機部

Internal grinding machine Product List

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Fully Automatic Internal Grinding Machine 'SIG02α II'

Fully Automatic Internal Grinding Machine 'SIG02α II'

Successfully achieved significant miniaturization of the main unit! It widely accommodates various spindle types with an outer diameter of up to φ62.

The "SIG02α II" is an evolved fully automatic internal grinding machine that inherits the SIG series, boasting a sales record of over 2,000 units. In addition to the well-established 2-roller 1-shoe spindle, a 2-shoe 1-magnet spindle is also available. It features a high-rigidity static pressure guide surface on the table guide. Moreover, it has successfully achieved significant miniaturization of the machine body, allowing it to accommodate workpiece outer diameters ranging from φ8mm to φ40mm and φ30mm to φ62mm, depending on the spindle type. 【Features】 ■ Centerless type for bearing processing ■ High-rigidity static pressure guide surface on the table guide ■ Capable of handling workpiece outer diameters from φ8mm to φ40mm and φ30mm to φ62mm ■ Significant miniaturization of the machine body achieved ■ Body dimensions: 1,240mm(W) × 1,220mm(D) × 1,800mm(H) *For more details, please refer to the PDF document or feel free to contact us.

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  • Grinding Machine
  • Internal grinding machine

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Internal Grinding Machine SIG03α

Internal Grinding Machine SIG03α

Bearing Grinding Machine Series

This is the introduction of a high-precision, high-efficiency internal grinding machine developed based on the tradition and experience since the founding of Seiko Instruments Inc.!

  • Grinding Machine
  • Internal grinding machine

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Universal CNC Internal Grinding Machine STG-6N

Universal CNC Internal Grinding Machine STG-6N

Universal high-precision CNC internal grinding machine

A compact universal internal grinding machine that achieves precision and high-efficiency processing for a wide variety of products with an outer diameter of up to 160mm. ● Space-saving design Main body size: 1,600(W) × 1,615(D) × 1,320(H) mm ● Compact size design tailored to factories that prioritize equipment size and corresponding workpiece size ● Standard equipped with a high-output, high-rigidity in-house spindle (SSPG series) that contributes to improved productivity through high-precision and high-efficiency processing ● Chuck size: 6 inches

  • Grinding Machine
  • Internal grinding machine

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Fully automatic high-precision internal grinding machine 'SIG-2S II/SIG-3S II'

Fully automatic high-precision internal grinding machine 'SIG-2S II/SIG-3S II'

A grinding machine that allows for versatile grinding with multiple grinding stone spindle axes, featuring a diaphragm chuck spindle.

The "SIG-2S II/SIG-3S II" is a high-precision internal grinding machine characterized by multiple grinding spindle axes. With 1 chuck and 2 spindles, it enables versatile grinding. The processing specification features a diaphragm chuck spindle. It can be used for machining automotive parts such as gasoline and diesel injection nozzles and pumps. 【Features】 ■ For automotive parts machining ■ Versatile grinding with 1 chuck and 2 spindles ■ Diaphragm chuck spindle ■ Main body dimensions ・SIG-2S II: 2,100mm(W)×1,600mm(D)×1,950mm(H) ・SIG-3S II: 2,900mm(W)×3,900mm(D)×2,300mm(H) *For more details, please refer to the PDF document or feel free to contact us.

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  • Grinding Machine
  • Internal grinding machine

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Improvement of production efficiency through reduced processing time - CNC internal grinding machine *Test processing available

Improvement of production efficiency through reduced processing time - CNC internal grinding machine *Test processing available

We will introduce a case where the introduction of our internal grinding machine has achieved a reduction in processing time and an improvement in accuracy!

The "STG-6N" is a CNC internal grinding machine equipped with a standard 6-inch scroll chuck. It features an easy-to-use human interface and a space-saving design. It is equipped with a proprietary low-vibration, high-precision high-frequency spindle. 【Examples of improved production efficiency through reduced processing time】 <Gear> ■Inner diameter size: φ40×37mm ■Material: SCM415 ■Processing time: 80% reduction ■Processing accuracy: Improved (Surface roughness Ra 0.1μm or less) <Ring Gauge> ■Inner diameter size: φ50×20mm ■Material: SKS31 ■Processing time: 56% reduction ■Processing accuracy: Improved (Roundness 0.3μm or less / Surface roughness Ra 0.1μm or less) <Collet> ■Inner diameter size: φ30×20mm ■Material: Carbide ■Processing time: 70% reduction ■Processing accuracy: Improved (Surface roughness Ra 0.1μm or less) *For more details on various examples, please contact us directly. *For more information on the internal grinding machine, please refer to the PDF document or feel free to contact us.

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  • Grinding Machine
  • Internal grinding machine

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New Product: Compact Universal Internal Grinding Machine 'STG-3NX'

New Product: Compact Universal Internal Grinding Machine 'STG-3NX'

Compact universal internal grinding machine 'STG-3NX' that achieves high precision and high productivity. *Test processing available.

The product, the compact universal internal grinding machine "STG-3NX," is a CNC internal grinding machine that enables high-precision and high-efficiency processing despite its compact size. Since its launch in 2009, the "STG-3NX" has received high praise as a successor model to the small internal grinding machine "STG-3N," which is equipped with a 3-inch/4-inch chuck. It retains the advantages of space-saving, high rigidity, and low center of gravity structure while expanding the internal space by extending the stroke of the spindle base table, thereby improving workpiece loading and unloading as well as in-machine measurement operations. Additionally, it is equipped with a high-output, high-rigidity self-developed high-frequency spindle "H Series," contributing to the improvement of customer productivity through high-precision and high-efficiency processing. 【Features】 ■ The stroke of the spindle base table is extended by 33%, expanding the internal space. ■ Achieves high-precision and high-efficiency processing. ■ Improved operability based on ergonomic layout. ■ Equipped with FANUC NC device (FIELD system compatible). *To evaluate the capabilities of the STG-3NX, we offer test processing of specified workpieces free of charge in principle. Please contact us through the site or form below.

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  • Grinding Machine
  • Internal grinding machine

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[Case Study] Seiko Instruments' Internal Grinding Machine Solves Challenges for Small Components

[Case Study] Seiko Instruments' Internal Grinding Machine Solves Challenges for Small Components

Introducing a case where the adoption of a high-frequency spindle resolved difficulties in ensuring precision.

We would like to introduce a case where Seiko Instruments Inc. resolved challenges through test processing. For small parts, such as components for medical devices, where coaxiality between the inner and outer diameters is required, it is generally difficult to ensure precision using commonly employed tool clamping methods like air chucks, diaphragm chucks, and magnetic chucks. Our internal grinding machine addresses these challenges by adopting a roll spindle mechanism used in bearing processing and our self-developed high-frequency spindle. [Case Overview] ■ Issues - Difficulty in ensuring precision for small parts requiring coaxiality between the inner and outer diameters. ■ Results - Achieved automatic supply of parts via a parts feeder, automatic measurement of workpieces after processing, and automatic discharge. - Capable of responding to demands not only for processing precision and efficiency but also for overall productivity improvement. *For more details, please refer to the related links or feel free to contact us.

  • Grinding Machine
  • Internal grinding machine

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[Case Study] Seiko Instruments' Internal Grinding Machine Solves Challenges of <Micro Holes>

[Case Study] Seiko Instruments' Internal Grinding Machine Solves Challenges of <Micro Holes>

Introducing examples of problem-solving achieved through high-speed spindles and machining know-how cultivated over many years of experience.

We would like to introduce a case where Seiko Instruments Inc. resolved challenges through test processing. When performing internal grinding of micro-holes, the rigidity of the quill supporting the grinding wheel becomes lower, resulting in greater deflection of the quill, making it very difficult to ensure dimensional and shape accuracy. With our internal grinding machine, we can perform high-efficiency internal grinding of extremely small diameters down to a minimum of 0.3mm, thanks to our self-developed high-speed spindle with high precision and the processing know-how cultivated over many years of experience. [Case Overview] ■Challenges - Ensuring dimensional and shape accuracy ■Results - High-efficiency internal grinding of extremely small diameters down to a minimum of 0.3mm is possible. *For more details, please refer to the related links or feel free to contact us.

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  • Grinding Machine
  • Internal grinding machine

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[Processing Example] Magnet General-purpose Grinding Machine CNC Internal Grinding Machine STG-3N

[Processing Example] Magnet General-purpose Grinding Machine CNC Internal Grinding Machine STG-3N

Shortening Cycle Time! Introducing Examples of Processing Neodymium Magnets

We would like to introduce a case study of "magnet" processing that we conducted. Our goal was to improve processing accuracy and achieve in-house production of workpieces that our customers had been outsourcing. Compared to before implementation, processing time was reduced by 65%, achieving a surface roughness of Ra 1.5μm or less and roundness of 1.5μm or less. 【Case Overview】 ■ Processing dimensions: φ4mm × 26.4mm ■ Material: Neodymium magnet ■ Features: Special material, long hole (L/D = 6.6) ■ Model: STG-3N ■ Spindle: M8H-T (Max 80,000rpm) *For more details, please refer to the related links or feel free to contact us.

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  • Other processing machines
  • Internal grinding machine

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[Processing Example] Thin-Walled Workpiece CNC Internal Grinding Machine STG-6N

[Processing Example] Thin-Walled Workpiece CNC Internal Grinding Machine STG-6N

Applying the technology cultivated in mass production of precision parts to general-purpose internal grinding machines! Introducing our processing examples.

We would like to introduce our processing case that has achieved high-precision machining of thin-walled workpieces. Workpieces that require internal grinding often demand not only roundness and surface roughness but also runout (coaxiality) relative to the outer diameter. This is particularly challenging for thin-walled workpieces, where deformation due to gripping becomes an issue. To address this, we have equipped our CNC internal grinding machine STG-6N, which we manufacture and sell, with a newly developed 2-roll 1-shoe spindle, enabling high-precision machining of thin-walled workpieces. 【Case Overview】 ■Challenges - Susceptible to deformation due to gripping ■Results - Uniform wall thickness relative to the reference workpiece's outer diameter - Dramatic improvement in coaxiality of the inner diameter relative to the outer diameter after machining - Reduced deformation of the workpiece due to gripping, leading to expected improvements in roundness *For more details, please refer to the PDF document or feel free to contact us.

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  • Grinding Machine
  • Internal grinding machine

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[Processing Example] Guide Bush <Long Hole> CNC Internal Grinding Machine STG-6N

[Processing Example] Guide Bush <Long Hole> CNC Internal Grinding Machine STG-6N

Compared to before the introduction, processing time reduced by 35%! Introducing a case study of mold processing featuring long holes.

We would like to introduce a processing case of "guide bushes" that we conducted. As a background for the introduction, we proposed improving productivity by reducing processing time. The processing dimensions are φ24×67mm. The material is SUJ2, and the feature is a long hole. As a result of the introduction, we achieved a 35% reduction in processing time, a surface roughness of Ra0.4μm or less, and roundness of 1.5μm or less. 【Case Overview】 ■ Processing dimensions: φ24×67mm ■ Material: SUJ2 ■ Feature: Long hole ■ Model: STG-6N ■ Spindle: SSPG-045 T100 (Max 45,000rpm) *For more details, please refer to the related links or feel free to contact us.

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  • Processing Contract
  • Mold Design
  • Internal grinding machine

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[Processing Example] Guide Bush <Flange on Outer Diameter> CNC Internal Grinding Machine

[Processing Example] Guide Bush <Flange on Outer Diameter> CNC Internal Grinding Machine

Surface roughness should be below Ra0.2μm! Here are examples of machining guide bushes made of SUJ2 material.

We would like to introduce a processing example of "guide bushes" that we conducted. The model used is STG-6N. The processing dimensions are φ13mm×25mm, and the material is SUJ2. The background for the introduction is the improvement of productivity through reduced processing time. As a result of the introduction, the surface roughness was achieved at Ra0.2μm or below, and the roundness was realized at 0.8μm or below. 【Case Overview】 ■ Processing dimensions: φ13mm×25mm ■ Material: SUJ2 ■ Features: Flange on the outer diameter ■ Model: STG-6N ■ Spindle: SSPG-045 T100 (Max 45,000rpm) *For more details, please refer to the related links or feel free to contact us.

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  • Other molds
  • Mold Design
  • Processing Contract
  • Internal grinding machine

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Learn from the basics! What is a grinding machine?

Learn from the basics! What is a grinding machine?

This explains the differences between free grinding machines and machine grinding machines, as well as the types of grinding machines and grinding processes. *Booklets are being distributed.*

A grinding machine is a piece of equipment that processes workpieces by pressing a high-speed rotating grinding wheel against the material to be machined. It is mainly used for finishing processes and machining difficult-to-cut materials, but various types of equipment and machining methods are employed depending on the workpiece and the area to be processed. Additionally, with the miniaturization and complexity of finished products, the demands on machining equipment continue to rise. This document explains the basics of grinding machines and the types of grinding machines and grinding processes. We encourage you to read it. At Seiko Instruments, we primarily handle internal grinding machines. Seiko Instruments' internal grinding machines utilize a self-developed high-frequency spindle, achieving high precision and work efficiency, especially for small-diameter hole machining, while also being space-saving. If you are considering the introduction of an internal grinding machine, please feel free to consult with Seiko Instruments. *For more details, please refer to the PDF document or feel free to contact us.

  • Grinding Machine
  • Internal grinding machine

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High-precision self-shape internal surface grinding machine 'SNC-28TG'

High-precision self-shape internal surface grinding machine 'SNC-28TG'

High-speed grinding for optical lens molds with a diameter of 1mm or less! Dedicated machine for processing spherical and aspherical lens molds.

The "SNC-28TG" is a multi-NC grinding machine that can handle vertical/oblique axis and horizontal processing all in one unit. The vertical and oblique axes can be switched using the same unit. Setup time is reduced to half that of conventional machines, making it suitable for rough to medium finishing of precision equipment parts. Additionally, the method for setting the grinding wheel is versatile, allowing for various configurations. 【Features】 ■ Capable of vertical/oblique axis and horizontal processing in one machine ■ High-speed grinding for molds for optical lenses with a diameter of 1mm or less ■ Vertical and oblique axes can be switched using the same unit ■ Setup time reduced to half that of conventional machines ■ Ideal for rough to medium finishing of precision equipment parts *For more details, please refer to the PDF document or feel free to contact us.

  • Grinding Machine
  • Internal grinding machine

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Schneeburger Co. 5-axis CNC grinding machine corvus NGB

Schneeburger Co. 5-axis CNC grinding machine corvus NGB

Supports the production of all large cutting tools that can achieve complete machining of outer diameters and end faces with high performance and high grinding power corresponding to large components.

Maximum cutting length of 2800 mm, maximum diameter of 400 mm, and maximum workpiece length of 3500 mm that can be chucked. The T-slot table allows for flexible installation of a wide variety of clamping systems from the tailstock to the magnetic chuck. CNC grinding for paper knives, tools for the food and plastic industries, profile grinding, cylindrical grinding, and surface grinding. Accessories for expanding applications and improving productivity: A 6-axis robot for loading workpieces with four pallets, or a carousel design for tool holders with HSK mount A grinding wheel loader equipped with an 8-wheel package including coolant nozzles Grinding spindle with a maximum output of 53 kW / HSK 190 Direct measurement system for all axes Linear motors for all axes Direct drive motor for cylindrical grinding with a maximum torque of 1250 Nm Dress unit for profile dressing Manual or hydraulic tailstock Manual, hydraulic, or CNC-controlled steady rest that follows the grinding point Collet chuck, clamp mandrel, magnetic chuck Coolant filter Exhaust filter CO2 fire extinguishing system

  • Grinding Machine
  • Internal grinding machine

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CNC Internal Grinding Machine "IGH Series"

CNC Internal Grinding Machine "IGH Series"

Rich options settings! The main spindle is equipped as standard with a swivel function that allows for 0.0001-degree setting units via NC control.

The "IGH Series" is a CNC internal grinding machine equipped with two grinding spindles (NT type) and a turret wheel head with a turret indexing function. The work spindle base features a swivel function with NC control that allows for a setting unit of 0.0001 degrees. It enables continuous automatic grinding of the workpiece's outer diameter, end face, inner diameter, and tapered surface with a single chuck. Additionally, we also offer the NE type, which has a single internal grinding spindle (fixed wheel head). 【Features】 ■ Continuous automatic grinding of inner and outer diameters, end faces, and tapered surfaces with a single chuck ■ Standard equipped with a turret-type wheel head (one external grinding axis and one internal grinding axis) <NT type> ■ Standard equipped with a swivel function with NC control allowing for a setting unit of 0.0001 degrees on the spindle base ■ A wide range of optional settings to accommodate various machining needs *For more details, please refer to the PDF document or feel free to contact us.

  • Grinding Machine
  • Internal grinding machine

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CNC Internal Grinding Machine "IGT-8N/12N"

CNC Internal Grinding Machine "IGT-8N/12N"

High precision and reduced skill requirements for taper hole grinding are possible! High precision grinding with 0.1μm scale feedback control on the X and Z axes.

The "IGT-8N/12N" is a machine developed for the rationalization of internal grinding of spindles in machine tools. It can automatically grind the inner diameter, outer diameter, and end face of spindles such as machining centers and NC lathes, enabling significant process consolidation. Additionally, the taper angle calculation has been automated with NC technology, allowing for continuous automatic grinding of taper shapes and straight holes through program input. 【Features】 ■ High-precision grinding with 0.1μm scale feedback control on the X and Z axes ■ Adoption of a work swivel method for taper grinding ■ Minimum angle setting unit: control possible to 0.0001 degrees ■ Turret-type grinding wheel base with 4 spindles allows for multi-process grinding with a single chuck ■ A wide range of grinding spindles enables optimal grinding wheel selection for processing operations *For more details, please refer to the PDF document or feel free to contact us.

  • Grinding Machine
  • Internal grinding machine

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Universal Precision Internal Grinding Machine YIG-15-SA

Universal Precision Internal Grinding Machine YIG-15-SA

A general-purpose precision internal grinding machine with push-button analog control that maximizes the benefits of manual operation; both new and remanufactured machines are eligible for the "Monozukuri Subsidy."

The smallest general-purpose precision internal grinding machine in the YIG series is the YIG-15SA model. It has a proven roundness measurement of 0.07μm. The spindle and grinding wheel spindle have a lower center height of 1080mm, which is highly appreciated as it allows the operator to lean in and easily operate the handles and levers while observing the machining conditions. Additionally, one operator can work with 2 to 3 machines simultaneously. The SA model offers a choice between a "semi-automatic grinding cycle" for processing single items and a "fully automatic grinding cycle" for continuous processing of identical items. It is suitable for small-batch production of various types, ranging from 100 to 300 pieces. The spindle swivel angle of the YIG-15SA is +5° (half angle). The workpieces to be ground are expected to be straight items such as automotive parts, motorcycle components, and electrical parts, with small and short inner diameters.

  • Grinding Machine
  • Internal grinding machine

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