Machining examples

NC-controlled vertical axis for highly accurate surface grinding

■ Automatic sizing surface machining

The NC-controlled vertical axis ensures accurate surface grinding, and grinds workpieces even with a severe tolerance efficiently and accurately.
A standard type with the minimum infeed setting unit of 1μm and an optional type with the setting unit of 1μm are available.

■ Surface machining

Preliminary machining and finish machining of such materials as STAVAX, SKD-II, stainless steel, ceramics, etc. are possible. In addition to manual operation, plunge machining and traverse grinding are also possible by fully automatic operation.

■ Efficient machining

The rigid machine design ensures heavy-duty grinding with high stock removal.


High accuracy at reasonable cost.  A saddle-type for surface grinding with high accuracy, while maintaining the same usability of the general-purpose machine

1. Accurate infeed in units of 1μm and automatic sizing surface machining by single axis NC control

By employing the accurate direct acting rolling guide into the vertical axis, accurate infeed in units of 1μm is possible up to the finish grinding. The NC-controlled vertical axis also enables automatic sizing surface machining of workpieces even with a severe tolerance.

2. A wide machining area and excellent straightness. There are reasons for many users to select high accuracy

A large table work area and a broad range of grinding. The scraping surface, finished by skilled workman spending time and effort, and unique sliding surface design achieve unprecedented straightness accuracy with restricting a change in travelling line during longitudinal-table movement and no change in posture caused by the load. The saddle incorporates a Nagase original, ultra wide and ultra low friction V&V slideway.

3. Unique ultra shock-free reverse table for machining with unprecedented level of quality

The original parts configuration enables smooth reverse rotation of the longitudinal table. This reduces influence on the grinding surface due to reverse shock and demonstrates high-quality machining that conventional general-purpose machines cannot achieve.

4. High-rigidity and precision spindle for finish machining or hard-to-machine materials and heavy-duty grinding

The spindle unit employs an super-precision angular contact bearing, which supports the radial load and axial load securely and can be used for both precision finish machining of hard-to-machine materials and heavy-duty grinding. The Balance Vector (Doctor) NB-3012 for automatically measuring and correcting the balance of the rotating grinding wheel restricts rotational vibration of the grinding wheel and achieves quality machining. In addition, Nagase’s original hydrostatic bearing and ultra-low vibration motor can be mounted (optional).

5. NC operation panel accessible to beginners

The up/down rapid feed lever, up/down infeed handle, table start switch, etc. that are used daily are located at the saddle. In order to enable the total beginner of the NC-controlled machine to operate the machine from the date of introduction, switches on the operation panel are restricted to the minimum necessary and arranged to be easily viewable.

■ NC-controllable vertical axis

A 1μm-infeed is securely done and grinding conditions can be changed during automatic grinding.

■ Manual pulse generator handle for quick operation

The up/down rapid feed lever, up/down infeed handle, table start switch, etc. that are used daily are located at the saddle.

■ NC operation panel

Simple operation contributes to labor saving and enhanced efficiency

■ Main body structure of SGK, upgraded from SGW/M

SGW/M and SGK differ in the machine main body. SGK has a larger column for stable 1μm-order infeed.


■ New Balance Vector NB-3012

Accurate grinding is easily done through the display of vibration caused by wheel rotation.

■ Ultra-low vibration motor

Vibration of the grinding wheel spindle is minimized to achieve high rotation accuracy.

■nvac products: Diamond/CBN wheel in the NRX/NRXB series

■nvac products: General grinding wheels in the WAP series

nvac products:
Nagase offers diamond/CGN wheels, WA/GC grinding wheels, dressers, flanges and filters according to customer’s grinding needs.

In addition to the above, a variety of options are available. For detailed information, please contact the Nagase sales office.


Model/item Size Chucking size Table movement amount
(in longitudinal and cross directions)
Table top surface
Spindle center
Min. unit in vertical direction Grinding wheel size
(OD x W x ID)
Grinding wheel spindle
    mm mm mm mm mm kW
SGK 52 500×200 605×235 490 0.001(0.0001) φ180〜255×8〜19×φ50.8 2P
63 600×300 750×340 520 0.001(0.0001) φ200〜355×25〜38×φ127 4P
64 600×400 750×440 520 0.001(0.0001) φ200〜355×25〜38×φ127 4P

■ Contents and specifications are subject to change without prior notice. The contents of description and pictures may contain optional specifications. To place an order, please check the manufacture specifications for details.

■ Machine accuracy and machining accuracy described on this site may differ depending on the measurement and machining conditions.

■ For further details, you may request specifications, technical information, etc.

■ For resale or export of the product, contact us in advance. Exporting products require designated procedures as determined by the Foreign Exchange and Foreign Trade Control Law.

■ This product must not be transferred for any purposes of use that prevents international peace and security or used for one’s own purpose or used by a third party.


For further information, please contact us. We will make a proposal according to your requests.

Customers who are thinking of introducing new facilities are welcome to ask us for test machining or visit our factory. Please feel free to consult us. Please inform us of facility conditions, size and material of machining workpieces, machining time, etc. in detail.
Depending on the contents of your request, sales personnel in your district will make a proposal to meet your requirements.

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