EMAG EMAG WPG 7

$180,000 - $350,000 Updated 2026-03-19

Key Specifications

max workpiece length

250 mm (9.8 in)

max grinding diameter

80 mm (3.1 in)

center height

mmin

center length

mmin

max workpiece weight

30 kg (66 lb)

z axis travel

390 mm (15.4 in)

Overview

The EMAG WPG 7 is a modular CNC external cylindrical grinder designed for production grinding of shaft-type components up to 250 mm in length and 80 mm in diameter. Built on EMAG’s modular grinding platform, the WPG 7 combines a compact 1.8 x 2.4 meter footprint with a powerful 14 kW grinding spindle capable of peripheral speeds up to 50 m/s supporting both conventional corundum and CBN grinding wheels for flexible process optimization.

The machine provides 390 mm of Z-axis travel and 190-290 mm of X-axis travel (depending on configuration), with feed rates of 10 m/min on both axes. The grinding wheel capacity accommodates wheels up to 400 or 500 mm in diameter with a maximum width of 80 mm. The workpiece headstock features an MK4 or MK3 locating cone with a speed range continuously adjustable up to 2,000 RPM, controlled by a FANUC 0i-D series CNC with preloaded grinding cycles that reduce programming time for common operations.

The WPG 7 is available in two angular configurations: a 0-degree straight arrangement for conventional plunge and traverse grinding, and a 30-degree angled arrangement for angular-approach plunge grinding. The angled configuration enables simultaneous grinding of cylindrical and shoulder surfaces in a single plunge, reducing cycle times on components like gear shafts, motor shafts, and transmission pinions. The Z-axis table can be adjusted up to 10 degrees for taper grinding applications.

Automation options include chain conveyors, pallet circulation systems, and robot integration, making the WPG 7 well-suited for integration into production cells. The machine handles workpieces up to 30 kg between centers, covering a broad range of small-to-medium shaft components in automotive, hydraulic, and general mechanical engineering applications.

The WPG 7 competes with production cylindrical grinders from Junker (Lean Selection), Schaudt, and Mikrosa, positioning itself as a modular, automation-ready platform at a competitive price point. New machines typically price between $180,000 and $350,000 depending on configuration and automation level.

Full Specifications

Parameter	Value
Max Workpiece Length	250 mm (9.8 in)
Max Grinding Diameter	80 mm (3.1 in)
Center Height	mmin
Center Length	mmin
Max Workpiece Weight	30 kg (66 lb)
Z Axis Travel	390 mm (15.4 in)
X Axis Travel	190 - 290 mm (7.5 - 11.4 in)
Z Axis Feed Rate	10 m/min (394 IPM)
X Axis Feed Rate	10 m/min (394 IPM)
Max Oscillating Stroke	200 mm (7.9 in)
Z Axis Table Adjustment	10 degrees
Grinding Spindle Power	14 kW (18.8 hp)
Grinding Wheel Diameter	400 / 500 mm (15.7 / 19.7 in)
Grinding Wheel Width Max	mmin
Grinding Wheel Bore	mmin
Max Peripheral Speed	50 m/s
Grinding Media	CBN or corundum
Workpiece Headstock Cone	MK4 or MK3
Workpiece Speed Range	0 - 2,000 RPM
Machine Configurations	0 degree straight or 30 degree angled
Floor Space Required	1,800 x 2,400 mm (70.9 x 94.5 in)
CNC Control	FANUC 0i-D with preloaded grinding cycles
Workpiece Length Max	mmin
Workpiece Weight Max	kglb
Oscillating Circuit Max	mmin
Grindable Diameter	mmin
Axis Longitudinal Travel	mmin
Axis Feedrate	m/minipm
Axis Table Adjustment	degrees
Axis Transverse Travel	mmin
Grinding Wheel Dia	mmin
Grinding Wheel Circumferential Speed	m/s
Workpiece Headstock Speed	m/s

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

Strengths & Limitations

Strengths

14 kW grinding spindle with 50 m/s peripheral speed supports both CBN and conventional wheels for flexible process optimization across different materials
Compact 1.8 x 2.4 meter footprint maximizes production output per square meter of floor space in high-density manufacturing cells
Available in 0-degree and 30-degree angular configurations enabling simultaneous OD and shoulder grinding in a single plunge for faster cycle times
FANUC 0i-D control with preloaded grinding cycles reduces programming time and operator training requirements for common cylindrical grinding operations
Automation-ready design with chain conveyor, pallet, and robot integration options enables unattended production grinding in automated cells
Modular platform architecture allows configuration flexibility for diverse grinding applications from simple plunge to complex angular approach work

Limitations

250 mm maximum workpiece length limits the machine to shorter shaft components as longer workpieces require the UG Series or HG Series grinders
80 mm maximum grinding diameter restricts the machine to small-diameter components as larger work requires stepping up to the HG 2 or similar platform
Single-spindle configuration means one grinding operation at a time unlike dual-spindle machines that can grind two diameters simultaneously
FANUC 0i-D control lacks the advanced contour grinding capability of the FANUC 31 iB Plus available on the UG Series for complex profiles

Best For

Automotive drivetrain manufacturers production-grinding transmission shafts, pinions, and motor shafts up to 250 mm length and 80 mm diameter Hydraulic component producers grinding valve spools, piston rods, and cylinder shafts requiring tight cylindrical tolerances in medium-to-high volumes Production facilities seeking a compact automation-ready cylindrical grinder for integration into robotic cells or conveyor-fed production lines Shops grinding hardened steel components where CBN wheel capability at 50 m/s enables high-speed grinding with extended wheel life Small-to-medium shaft component manufacturers needing angular-approach grinding to combine OD and shoulder operations in a single cycle

Frequently Asked Questions

01 What is the difference between the 0-degree and 30-degree WPG 7 configurations?

The 0-degree (straight) configuration positions the grinding wheel parallel to the workpiece axis for conventional plunge and traverse grinding. The 30-degree (angled) configuration tilts the grinding spindle for angular-approach plunge grinding, enabling simultaneous grinding of cylindrical surfaces and shoulders in a single plunge operation.

02 Can the WPG 7 use CBN grinding wheels?

Yes. The 14 kW grinding spindle supports peripheral speeds up to 50 m/s, which is within the operating range for CBN wheels. CBN grinding provides significantly higher material removal rates and longer wheel life on hardened steel compared to conventional corundum wheels.

03 What automation options are available for the WPG 7?

The WPG 7 can be equipped with chain conveyors for continuous part feeding, pallet circulation systems for organized batch processing, or full robot integration for flexible automated loading and unloading.

04 How does the WPG 7 compare to a Junker Lean Selection cylindrical grinder?

Both are production-oriented CNC cylindrical grinders in a similar size class. The Junker Lean Selection emphasizes high-speed CBN grinding and is established in automotive production. The WPG 7 offers comparable capability with modular configuration flexibility and FANUC controls.