Emag UG Series Universal Grinding Machines: Precision

Emag UG Series Universal grinding machines for precision manufacturing tasks

2026-03-03 Source: Emag 4 min Reading Time

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The universal grinding machines in Emag’s UG Series combine proven grinding technology with a cost-efficient machine base. They are designed for users who are looking for a sophisticated solution for internal, external and out-of-round grinding and expect flexibility, precision and process reliability.

The Emag UG Series at a glance: UG 400, UG 630, UG 1000 and UG 1500 cover grinding lengths from 400 to 1,500 mm.(Source: Emag) — The Emag UG Series at a glance: UG 400, UG 630, UG 1000 and UG 1500 cover grinding lengths from 400 to 1,500 mm.
(Source: Emag)

The UG Series from Emag includes machines with grinding lengths from 400 to 1,500 millimeters. This gradation covers a wide range of requirements — from compact workshop machines for toolmaking to universal production solutions for longer shafts and complex geometries — whether clamped between centers or in a chuck.

The series is divided into four variants from 400 mm to 1,500 mm grinding length. Linear guides in the X and Z axes, servo drives with recirculating ball screws and direct-drive motorized grinding spindles form the technical basis. The standard center height is 175 mm and the maximum workpiece weight is 120 kilograms (model UG 1000). Larger center heights and workpiece weights are possible with additional equipment.

Gallery

Work area of the Emag UG Series. The combination of swiveling B-axis and direct-drive spindles enables internal and external grinding.(Source: Emag)

Compact workhead with precision tapered roller bearings for roundness accuracies of up to 0.5 µm. The swivel range of 0 to +30° enables flexible machining strategies.(Source: Emag)

The tailstock has a precision bearing quill with fine adjustment and sensory equipment for monitoring the workpiece position as well as a hydraulic reset.(Source: Emag)

Precision internal grinding on the Emag UG Series: Direct-driven spindles and rigid machine kinematics ensure high dimensional accuracy and excellent surface quality in the micrometer range.(Source: Emag)

Grinding head — precision through direct drive

The grinding head is equipped with direct-drive motor spindles. The spindle power is up to 11 kilowatts. As there is no belt drive, there are no sources of vibration, and the torque is transmitted without loss. This leads to uniform power transmission and reduces vibrations during the grinding process.

The automatically swiveling B-axis enables infinitely variable positioning between -15° and +225° with an accuracy of 0.0005 degrees. This precision is required for surface and contour grinding, where the exact angular position of the grinding wheel determines the machining result. The achievable peripheral speed of the grinding wheel is 50 meters per second. Precision grinding spindles are used for internal machining. These spindles are characterized by high motor speeds and a robust bearing with oil-air lubrication, which is required for internal grinding of small bores.

Workhead — rigidity and concentricity

The workhead is equipped with precision tapered roller bearings that ensure high rigidity. The concentricity accuracy on the test workpiece is 0.5 micrometers. This accuracy is the result of the rigid bearings and the quality of the components used.

A swivel range of 0° to +30° enables various grinding strategies for cone grinding. A pneumatic lifting device facilitates set-up and positioning of the workpiece. AE sensory equipment can be integrated as an option. These sensors detect the contact between the grinding wheel and workpiece and reduce idle times.

An optional workpiece spindle with C-axis is available for out-of-round and thread grinding. In this case, the workpiece spindle is designed as a motor spindle with rotary positioning. This enables synchronized movements between the feed of the grinding spindle and the rotation of the workpiece.

For significantly greater efficiency: Smart grinding technologies mark a decisive step toward robust, self-optimizing manufacturing systems. (Source: KSF)

Tailstock — precision centering when grinding between centers

The standard tailstock is equipped with a quill with a diameter of 63 millimeters for MK4 centers. It runs low backlash in the guide, which enables precise centering of the workpiece. A fine adjustment of ±40 micrometers allow the correction of taper deviations and ensures concentricity of well under one micrometer.

Manual or hydraulic actuation systems are available. The hydraulic version speeds up workpiece changeover, as the quill is automatically retracted after machining. An integrated sensory equipment monitors the correct position of the workpiece tip and increases process reliability.

Dressing systems — ensuring constant grinding conditions

Various dressing systems are available for different requirements. Dressing is an essential part of the grinding process, as the geometry and sharpness of the grinding wheel significantly determine the surface quality and dimensional accuracy.

There are various systems available ranging from table dresser with flexible positioning and dressing spindle on the workhead to dressing spindle on the workhead and holder for dressing tiles on the tailstock and workhead.

The modular design allows the dressing system to be adapted to the respective application. The selection of a suitable dressing system depends on the type of grinding wheel, number of pieces, workpiece geometry and required surface qualities.

The machines in the UG Series can be extended according to customer requirements, for example with NC synchronous tailstock, in-process measuring technology, automatic tailstock with NC axis, hydraulic steady rests and many other options.

Vomat KSS microfiltration technology contributes to more efficient and resource-saving processes, for example in tool grinding. Sustainability thus becomes a real productivity reserve. (Source: Vomat)

Control and operation

The UG machines are equipped with the Fanuc 0i-TF CNC control as standard. This control offers a dialog-oriented HMI that simplifies programming and operation. User guidance is logically structured, and frequently used functions are directly accessible.

The Fanuc 31iB Plus is available for more complex contours, especially for out-of-round and thread grinding. This controller has a higher computing power and supports extended functions for synchronized motion control. Interpolation between the axes is performed with high precision, which is necessary for machining out-of-round geometries.

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The use of Fanuc controllers offers advantages in international applications. The controllers are used worldwide, service availability is high and spare parts are available at short notice. This minimizes downtime and facilitates the training of operators who are familiar with Fanuc controls.

Worldwide customer support

Emag maintains a global service network covering all continents. The service locations are in Germany, Great Britain, France, Spain, Italy, the USA, Mexico, Brazil, India, China and South Korea. This decentralized structure enables short response times and a rapid on-site presence for service requests.

The service technicians at all locations have access to a shared knowledge pool. Experiences from service cases are systematically analyzed and made available worldwide. This allows customers to benefit from the accumulated know-how of the Emag organization irrespective of their location.

As an OEM supplier, the company guarantees to help the customer as quickly as possible — whether during commissioning, with technical questions or in the event of a malfunction. On request, Emag can supply a turn-key package that includes not only the machine but also the tool, workholding technology, cutting fluids and the finished workpiece program. The customer thus receives a production-ready solution from a single source.

The service program also offers preventive servicing, training courses at the Emag Academy, retrofits and original spare parts that are always available. The aim of all services is to maximize machine availability and ensure a long service life for the investment.

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