EMAG USC 850

$300,000 - $500,000 (estimated) Updated 2026-03-19

Key Specifications

Max Turn Length

2,000 mm (78.5 in)

max swing diameter

800 mm (31.5 in)

max turning diameter

700 mm (27.5 in)

max workpiece weight

600 kg (1,323 lb)

max bar passage

mmin

spindle power continuous

22 kW (30 hp)

Overview

The EMAG USC 850 is a heavy-duty universal horizontal CNC lathe from EMAG's Classic Shafts lineup, built for production turning of large shaft components up to 700 mm turning diameter, 2,000 mm turning length, and 600 kg workpiece weight. This is EMAG's largest horizontal shaft turning platform, positioned for the heavy industrial and energy sector applications where workpieces include large pump shafts, turbine rotors, heavy equipment axles, and oil field components that exceed the capacity of EMAG's vertical machines.

The main spindle delivers 22 kW continuous power (30 kW at 30-minute duty) through an A2-11 spindle nose with a 132 mm bar passage. The spindle runs in two speed ranges: 50-666 RPM in the low range for heavy roughing of large diameters, and 50-2,000 RPM in the high range for finishing operations and smaller-diameter features. The spindle bearing arrangement combines precision angular contact ball bearings with double-row cylindrical roller bearings, providing both the rigidity for heavy cuts and the rotational accuracy for finish turning to IT6 machining tolerance.

The 800 mm swing diameter provides clearance above the cross slide for large-diameter workpieces and fixturing. The 12-station BMT75 turret carries heavy-duty tooling including driven tools rated at 3,000 RPM and 5 kW for cross-drilling, milling, and tapping operations on shaft features. The turret accepts turning tools up to 25 x 25 mm shank and drilling tools up to 50 mm diameter, providing the tool capacity for complex shaft machining sequences.

The tailstock features a 150 mm quill diameter with 200 mm stroke and MK6 taper, providing the support rigidity needed for long shaft turning at production feeds and speeds. The combination of heavy-duty tailstock, large bar passage, and 2,000 mm turning length makes the USC 850 suitable for the full range of medium and large shaft components that require between-centers turning.

New USC 850 machines typically price between $300,000 and $500,000 depending on configuration, driven tool options, and automation interfaces. The machine competes with heavy-duty horizontal lathes from Okuma, Mori Seiki, and Weisser in the large-shaft production turning segment.

Full Specifications

Parameter	Value
Max Swing Diameter	800 mm (31.5 in)
Max Turning Diameter	700 mm (27.5 in)
Max Turning Length	2,000 mm (78.5 in)
Max Workpiece Weight	600 kg (1,323 lb)
Max Bar Passage	mmin
Spindle Power Continuous	22 kW (30 hp)
Spindle Power 30 Min	30 kW (40 hp)
Spindle Speed Low Range	50 - 666 RPM
Spindle Speed High Range	50 - 2,000 RPM
Spindle Nose	A2-11
Spindle Bearings	Precision angular contact ball + double-row cylindrical roller
Turret Stations	12 (BMT75)
Driven Tool Speed	3,000 RPM
Driven Tool Power	5 kW (6.7 hp)
Max Turning Tool Shank	25 x 25 mm
Max Drilling Tool Diameter	50 mm
Tailstock Quill Diameter	150 mm
Tailstock Quill Stroke	200 mm
Tailstock Center Taper	MK6
Machining Tolerance	IT6
CNC Control	Fanuc or Siemens
Swing Diameter	mmin
Turning Diameter Max	mmin
Maximum Turning Length	mmin
Workpiece Weight Max	kglb

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

Strengths & Limitations

Strengths

2,000 mm turning length with 600 kg workpiece capacity handles large shaft components that exceed the reach of EMAG's vertical machines
Two-speed spindle (50-666 / 50-2,000 RPM) optimizes for both heavy roughing at large diameters and finishing at higher speeds
IT6 machining tolerance capability demonstrates the precision available from the robust spindle bearing arrangement
12-station BMT75 turret with 5 kW driven tools enables complex shaft machining including cross-holes and flats without secondary operations
132 mm bar passage accommodates large-diameter bar stock for continuous production of medium shaft components
Heavy-duty tailstock with 150 mm quill and MK6 taper provides the rigidity needed for stable long-shaft turning

Limitations

22 kW continuous spindle power is moderate for a machine of this size — heavier roughing may require the 30 kW 30-minute rating
Horizontal layout lacks the chip evacuation advantages of EMAG's vertical pick-up machines
EMAG service network in North America is limited compared to Okuma and Mazak for large lathe support
Premium EMAG pricing places it above many Asian-built horizontal lathes with comparable specifications

Best For

Energy sector manufacturers machining large pump shafts, turbine rotors, and compressor shafts up to 700 mm diameter Oil and gas equipment producers turning drill collars, stabilizers, and large-diameter tubular components Heavy equipment manufacturers machining axle shafts, spindles, and large drive components up to 2,000 mm length Production environments requiring IT6 accuracy on medium and large shaft components in steel and cast iron Shops needing 132 mm bar passage for continuous bar-fed production of medium-diameter shaft components

Frequently Asked Questions

01 What is the difference between the EMAG USC 850 and HSC 1?

The USC 850 is significantly larger, handling workpieces up to 700 mm diameter x 2,000 mm length vs. the HSC 1's 375 mm diameter. The USC 850 has a 132 mm bar passage (vs. 51 mm), a two-speed spindle, and a heavy-duty tailstock. The HSC 1 offers a Y-axis and is designed for smaller shaft work, while the USC 850 targets heavy industrial components.

02 What machining accuracy does the USC 850 achieve?

The USC 850 is rated for IT6 machining tolerance. This level of accuracy is achieved through the combination of precision angular contact ball bearings and double-row cylindrical roller bearings in the spindle, the rigid machine base, and the heavy-duty tailstock support for long shaft components.

03 Can the USC 850 handle heavy roughing on large castings?

Yes. The two-speed spindle provides 50-666 RPM in the low range for heavy roughing at large diameters, with 30 kW available at 30-minute duty. The heavy-duty tailstock and rigid 12-station BMT75 turret support aggressive depths of cut on cast iron and steel workpieces up to 600 kg.

04 What driven tool capability does the USC 850 have?

The 12-station BMT75 turret includes driven tool capability at 3,000 RPM and 5 kW. This supports cross-drilling up to 50 mm diameter, milling of flats and keyways, and tapping operations on shaft features, reducing the need for secondary machining on a separate machine.