EMAG EMAG UG Series

$200,000 - $450,000 Updated 2026-03-19

Key Specifications

grinding length range

400 - 1,500 mm (15.7 - 59.1 in) depending on model

center height

mmin

max workpiece weight

120 kg (265 lb)

z axis travel

mmin

x axis travel

mmin

od spindle power

7.5 / 11 kW (10 / 15 hp)

Overview

The EMAG UG Series is a family of CNC universal cylindrical grinders spanning four models — the UG 400, UG 630, UG 1000, and UG 1500 — covering maximum grinding lengths from 400 mm to 1,500 mm. These machines represent EMAG’s classic approach to universal grinding: between-centers OD grinding, plunge grinding, angular grinding, and optional ID grinding on a single platform with full CNC capability via FANUC 0i-TF Plus controls (or FANUC 31 iB Plus for complex contour and out-of-round applications).

The UG Series machines feature center heights of 175 mm or 225 mm depending on configuration, Z-axis travel up to 1,240 mm, and X-axis travel of 320 mm. The OD spindle delivers 7.5 kW or 11 kW of power with grinding wheel diameters of 500 x 63 mm and peripheral speeds up to 50 m/s — fast enough to support CBN grinding wheels for hard-finished surfaces. The B-axis swivels from -15 degrees to +225 degrees with positioning accuracy of plus/minus 2 arc-seconds, enabling angular approach grinding and complex contour work without re-fixturing.

Precision is a defining characteristic of the UG Series. The workhead achieves roundness accuracy of 0.5 micrometers, and the tailstock delivers concentricity accuracies below 1 micrometer. Direct-drive motor spindles eliminate belt transmission losses and the vibration that comes with them, contributing to surface finish quality. The machines accept workpieces up to 120 kg, covering a broad range of shaft, spindle, and cylindrical component work.

The UG Series competes directly with universal cylindrical grinders from Studer (the S31 and S33), Kellenberger (Kel-Vita), and Junker (Jumat), positioning itself as a precision-focused alternative with EMAG’s machine tool heritage behind it. New UG Series machines typically price between $200,000 and $450,000 depending on model size and configuration.

For shops processing diverse cylindrical work — tool and die components, spindle reconditioning, hydraulic valve spools, medical implant shafts — the UG Series provides the flexibility to handle varied part geometries while maintaining the sub-micrometer accuracy that precision grinding demands.

Full Specifications

Parameter	Value
Grinding Length Range	400 - 1,500 mm (15.7 - 59.1 in) depending on model
Center Height	mmin
Max Workpiece Weight	120 kg (265 lb)
Z Axis Travel	mmin
X Axis Travel	mmin
Od Spindle Power	7.5 / 11 kW (10 / 15 hp)
Grinding Wheel Size	500 x 63 mm (19.7 x 2.5 in)
Max Peripheral Speed	50 m/s
B Axis Swivel	-15 to +225 degrees
B Axis Positioning Accuracy	plus/minus 2 arc-seconds
Roundness Accuracy	0.5 micrometers
Concentricity Accuracy	< 1 micrometer
Spindle Type	Direct-drive motor spindle
Grinding Media	Conventional and CBN
CNC Control	FANUC 0i-TF Plus (FANUC 31 iB Plus optional)
Machine	Grinding length
Ug 400	400 mm
Ug 630	630 mm
Ug 1000	1000 mm
Ug 1500	1500 mm
Grinding Length Max	mmin
Workpiece Weight Max	kglb
Spindle Power Od	kWhp
Grinding Wheel Dia	mm
Peripheral Speed	m/s

Specifications sourced from emag.com — verified 2026-03-28

Strengths & Limitations

Strengths

Four model sizes (400-1500 mm grinding length) cover a wide range of cylindrical workpiece lengths on a common platform architecture
Direct-drive motor spindles eliminate belt vibration and transmission losses delivering superior surface finish quality and dimensional consistency
B-axis swivel range of -15 to +225 degrees with 2 arc-second positioning enables complex angular and contour grinding without re-fixturing
Sub-micrometer roundness (0.5 micrometers) and concentricity (< 1 micrometer) meet the tightest tolerance requirements for precision cylindrical components
50 m/s peripheral speed supports both conventional and CBN grinding wheels enabling high-speed grinding for hardened steel and superalloy applications
FANUC 0i-TF Plus control with optional 31 iB Plus upgrade provides proven reliability and full contour/out-of-round grinding programmability

Limitations

Premium pricing of $200K-$450K places the UG Series above entry-level CNC cylindrical grinders requiring sufficient grinding volume to justify the investment
120 kg maximum workpiece weight limits the machine to medium-sized components as heavier shafts and rolls require larger-capacity grinders
EMAG North American service network for grinding machines is smaller than competitors like Studer or Junker potentially affecting response times
The universal design means the UG Series is not optimized for any single grinding application as dedicated plunge or thread grinders will outperform it in specialized roles

Best For

Precision grinding shops processing diverse cylindrical work including shafts, spindles, pins, and bushings requiring sub-micrometer roundness Tool and die operations needing universal OD, ID, and angular grinding capability on a single CNC platform with full contour programmability Aerospace and medical component manufacturers grinding tight-tolerance cylindrical parts in hardened steel, titanium, and superalloys Job shops and contract grinders handling varied part geometries where the B-axis flexibility eliminates multiple setups and dedicated machines Spindle reconditioning and repair facilities grinding bearing journals, tapers, and cylindrical surfaces to original equipment tolerances

Frequently Asked Questions

01 What are the four models in the EMAG UG Series?

The UG Series includes the UG 400 (400 mm max grinding length), UG 630 (630 mm), UG 1000 (1,000 mm), and UG 1500 (1,500 mm). All four share the same basic architecture with center heights of 175 or 225 mm and up to 120 kg workpiece capacity. The primary difference is the Z-axis travel and bed length to accommodate longer workpieces.

02 Can the EMAG UG Series use CBN grinding wheels?

Yes. The UG Series supports peripheral speeds up to 50 m/s, which is within the operating range for CBN grinding wheels. CBN wheels provide significantly longer wheel life and faster stock removal on hardened steel components compared to conventional aluminum oxide wheels, though they require higher initial investment in wheel cost.

03 What CNC control does the EMAG UG Series use?

The standard control is the FANUC 0i-TF Plus, which handles conventional cylindrical grinding cycles including plunge, traverse, and angular grinding. For more complex applications like out-of-round grinding, the optional FANUC 31 iB Plus provides the processing power for contour interpolation.

04 How does the UG Series compare to the Studer S31?

Both are universal CNC cylindrical grinders in a similar size and price class. The Studer S31 benefits from a larger grinding-focused service network and the StuderGRIND software ecosystem. The UG Series counters with direct-drive motor spindles, competitive roundness specs, and FANUC controls familiar to many shops.