Soraluce SBM 25

$2,000,000 - $3,500,000 Updated 2026-03-16

Key Specifications

X Travel

5,000 mm (196.9 in)

Y Travel

3,000 mm (118.1 in)

Z Travel

2,000 mm (78.7 in)

Max Spindle

1,500 RPM

Tool Capacity

40 tools in ATC

Table Size

2,500 x 2,000 mm (98.4 x 78.7 in)

Overview

The Soraluce SBM 25 is a horizontal table-type CNC boring and milling machine with a 250 mm (9.8 in) diameter spindle, designed for precision machining of large, heavy workpieces in energy, oil and gas, power generation, and heavy machinery manufacturing. The SBM designation signifies Soraluce's table-type boring mill series, with the 25 indicating the 250 mm spindle bore — the largest standard spindle diameter in this class — providing exceptional torque, rigidity, and bore-diameter capability.

The machine employs a moving-column, fixed-table configuration with table size of 2,500 x 2,000 mm (98.4 x 78.7 in) capable of supporting up to 30,000 kg (66,138 lb). X-axis travel (column longitudinal) reaches 5,000 mm (196.9 in), Y-axis (headstock vertical) 3,000 mm (118.1 in), Z-axis (column transverse) 2,000 mm (78.7 in), and W-axis (spindle quill) extends 750 mm (29.5 in). The 250 mm spindle delivers up to 1,500 RPM at 75 kW (100.6 HP) continuous power through a custom large-bore spindle face, enabling turning, facing, and boring of large-diameter parts in a single setup.

The SBM 25's large table size and spindle bore make it the tool of choice for machining pressure vessel end-caps, large flange faces, nuclear component housings, and ship propeller hubs where bore diameters in the 100-250 mm range must be machined with precision. Soraluce's temperature compensation system monitors thermal gradient across the column and automatically corrects positioning, maintaining accuracy across long production cycles on large steel components.

Positioning accuracy is ±0.010 mm (±0.00039 in) with ±0.005 mm (±0.0002 in) repeatability. The Siemens SINUMERIK 840D sl control manages all axes including W-axis quill and optional C-axis rotary table. New SBM 25 machines price between $2,000,000 and $3,500,000.

Full Specifications

Parameter	Value
Spindle Diameter	250 mm (9.8 in)
Max Spindle Speed	1,500 RPM
Spindle Motor Power	75 kW (100.6 HP) continuous
Table Size	2,500 x 2,000 mm (98.4 x 78.7 in)
Max Table Load	30,000 kg (66,138 lb)
X-Axis Travel	5,000 mm (196.9 in)
Y-Axis Travel	3,000 mm (118.1 in)
Z-Axis Travel	2,000 mm (78.7 in)
Quill Travel W	750 mm (29.5 in)
Rotary Table	Optional — full C-axis CNC
Tool Capacity	40 tools in ATC
Positioning Accuracy	±0.010 mm (±0.00039 in)
Repeatability	±0.005 mm (±0.0002 in)
Thermal Compensation	Column temperature monitoring with automatic correction
CNC Control	Siemens SINUMERIK 840D sl

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

Strengths & Limitations

Strengths

250 mm spindle diameter provides the torque and rigidity required to machine very large bore diameters (100-250 mm range) and face large surfaces in a single pass without chatter
30,000 kg table capacity handles the heaviest workpieces encountered in energy, nuclear, and marine heavy manufacturing — far exceeding smaller table-type boring mill limits
75 kW spindle power enables sustained heavy cutting in large steel and nickel alloy forgings where lower-powered machines would be limited to shallow depths of cut
Temperature compensation system maintains accuracy across multi-day machining cycles on large steel workpieces that experience significant thermal gradient variation
W-axis quill extension of 750 mm provides deep-bore reach without moving the column, maintaining better geometric alignment than W-axis travel on lighter machines
Siemens 840D sl with Soraluce's control interface manages all five axes (X, Y, Z, W, C) simultaneously for complex turning and boring operations on large cylindrical parts

Limitations

Price of $2M-$3.5M is accessible only to large capital-intensive manufacturers in energy, nuclear, or marine sectors where part values justify the investment
1,500 RPM maximum spindle speed limits milling productivity compared to dedicated machining centers; the SBM 25 is optimized for boring and turning, not high-speed contouring
Machine installation requires a substantial reinforced concrete foundation, crane access, and precision alignment — site preparation alone may take 6-12 months
40-tool ATC is modest for complex programs; the SBM 25 is not a tool-change-intensive machine and programs are typically structured around a smaller tool complement
Specialized application means a thin resale market; the machine must be sized precisely to the job — over-specifying wastes capital, under-specifying limits capability

Best For

Oil and gas equipment manufacturers machining large valve bodies, blowout preventer housings, and wellhead components requiring large precise bores under extreme pressure ratings Nuclear component manufacturers machining reactor pressure vessel flanges, pump casings, and heat exchanger headers where accuracy and material traceability are mandatory Power generation manufacturers producing large turbine housings, generator end-brackets, and compressor casings where 250 mm spindle bore provides access to large-diameter features Marine and shipbuilding facilities machining large propeller hubs, stern frame bearings, and rudder stock housings Heavy industry equipment manufacturers producing large press frames, rolling mill housings, and industrial gearbox housings requiring large precision bores and faced flanges

Frequently Asked Questions

01 What is the significance of a 250 mm spindle on the SBM 25?

The 250 mm spindle diameter is the bore size of the spindle itself, not the maximum bore size it can machine. A larger spindle provides greater torsional stiffness, which allows the machine to maintain accuracy and resist deflection during heavy boring operations. It also enables the use of larger boring bars — up to 250 mm at the spindle face — for machining very large bore diameters (150-600 mm is typical with appropriate boring bar extensions) in large pressure vessels and housings.

02 Can the SBM 25 perform turning operations?

Yes. With the optional CNC rotary table, the SBM 25 can perform turning-type operations on large cylindrical parts by rotating the workpiece on the table (C-axis) while the spindle feeds radially. This is commonly used for facing large flanges, turning OD features on large cylinders, and boring center holes in large forgings. The combination of boring and turning in one setup is a primary advantage of table-type boring mills with rotary table for large heavy parts.

03 What industries use the Soraluce SBM 25?

Primary industries include nuclear power (pressure vessel components), oil and gas (BOP housings, manifolds), power generation (turbine casings, compressor bodies), marine (propeller hubs, rudder posts), and heavy machinery manufacturing (large press and rolling mill components). Any sector machining forged or fabricated steel components with large-diameter bores and flat faced surfaces in the 10,000-30,000 kg weight range is a potential SBM 25 user.

04 How does the SBM 25 maintain accuracy on large steel workpieces?

The SBM 25 uses Soraluce's thermal compensation system: temperature sensors embedded in the column, headstock, and machine bed monitor thermal gradients continuously. The Siemens 840D sl control applies real-time axis offset corrections based on measured temperatures and pre-calibrated thermal expansion models. For multi-day machining cycles on large steel forgings that absorb and release heat slowly, this compensation system prevents the geometric drift that would otherwise accumulate over time.

05 How does the SBM 25 compare to the Soraluce SP 8000?

The SP 8000 is a floor-type boring mill where workpiece weight is unlimited and X-travel extends to 8 meters — it targets very long structural parts machined on the shop floor. The SBM 25 is a table-type boring mill with a 30,000 kg table, a much larger 250 mm spindle, and greater spindle power — targeting very heavy but more compact workpieces like pressure vessel sections, large flanges, and cylindrical forgings that need to be mounted and indexed on a precision rotary table. The two machines serve different form factors in the heavy boring mill market.