PAMA Speedturn

$2,000,000 - $5,000,000 Updated 2026-03-16

Key Specifications

Tool Capacity

80–160 tools (configuration-dependent)

Rapid Traverse

12–15 m/min (472–590 ipm) milling axes

machine type

Large-format CNC turn-mill center (mill-turn)

max turning diameter

Up to 2,000 mm (78.7 in) swing, configuration-dependent

max workpiece length

Up to 5,000 mm (197 in) between centers, configurable

max workpiece weight

Up to 30,000 kg (66,138 lb) between centers

Overview

The PAMA Speedturn is a large-format CNC turn-mill center designed for complete machining of large rotational components in a single setup — integrating the turning capability of a heavy-duty floor lathe with the boring and milling capability of a horizontal boring mill. This complete-machining philosophy targets large aerospace, power generation, oil and gas, and marine components where moving a partially machined workpiece from a lathe to a boring mill introduces repositioning errors that compromise the final part geometry.

The Speedturn combines a large-diameter, high-torque turning spindle with X, Y, Z, W, and B milling axes driven by PAMA's horizontal boring mill architecture. The turning spindle accepts workpieces up to 2,000 mm swing diameter with up to 5,000 mm between centers (configuration-dependent). The 150–200 mm boring spindle provides full horizontal boring and milling capability on the same machine, while the B-axis live tool turret handles turning, threading, grooving, and facing operations.

Typical Speedturn workpieces include: turbine rotor shafts requiring turning of journals plus milling of blade root slots; oil and gas compressor rotors requiring turning of journals plus boring of coupling faces; large aerospace structural components combining turned outer diameters with precision bored holes; and marine propulsion shafts requiring integral flange machining. The advantage of the Speedturn is that all of these operations occur in a single setup on a single machine, eliminating the dimensional accumulation of multi-machine setups.

The Siemens 840D sl control manages the complex multi-axis coordination between turning and milling operations, including synchronized turning (B-axis milling head synchronized to main spindle rotation) for non-circular features and off-center bores. The Speedturn is a configured-to-order machine; PAMA's engineering team works with the customer to define the machine configuration appropriate to their largest and most complex workpieces.

Full Specifications

Parameter	Value
Machine Type	Large-format CNC turn-mill center (mill-turn)
Max Turning Diameter	Up to 2,000 mm (78.7 in) swing, configuration-dependent
Max Workpiece Length	Up to 5,000 mm (197 in) between centers, configurable
Max Workpiece Weight	Up to 30,000 kg (66,138 lb) between centers
Turning Spindle Power	75–150 kW (101–201 hp) continuous, configuration-dependent
Turning Spindle Torque	Up to 60,000 Nm (44,254 ft-lb) peak
Turning Spindle Speed	Up to 500 RPM (heavy duty) / 1,000 RPM (standard)
Boring Spindle Diameter	110–150 mm, configuration-dependent
Boring Spindle Speed	2,500–3,500 RPM
Boring Spindle Power	45–75 kW (60–101 hp) continuous
Milling Travel X	3,000–6,000 mm (118–236 in)
Milling Travel Y	2,000–4,000 mm (79–157 in)
Milling Travel Z	1,000–2,000 mm (39–79 in)
Milling Travel W	750–900 mm (29.5–35.4 in) quill
B Axis Milling Head	±180° or full continuous, configuration-dependent
Rapid Traverse Rate	12–15 m/min (472–590 ipm) milling axes
Positioning Accuracy Turning	±0.005 mm (±0.0002 in) radial; ±0.005 mm (±0.0002 in) axial
Positioning Accuracy Milling	±0.005 mm (±0.0002 in) full stroke
Facing Head	Optional CNC facing head, U-axis
Tool Capacity	80–160 tools (configuration-dependent)
CNC Control	Siemens 840D sl
Machine Weight	Approximately 200,000–500,000 kg depending on configuration

Strengths & Limitations

Strengths

Complete machining of large rotational parts in a single setup eliminates repositioning errors that accumulate across multi-machine workflows — critical for journal-to-bore concentricity on rotor shafts
Integrating turning and boring/milling in one machine reduces total throughput time for large components from weeks (multi-machine routing) to days
75–150 kW turning spindle with up to 60,000 Nm torque handles the heaviest roughing cuts on large steel and titanium forgings
110–150 mm boring spindle provides full horizontal boring and milling capability for complex features — flanges, bores, keyways, and cross-holes — in the same setup as turning
Siemens 840D sl with synchronized turning capability enables machining of non-circular features (polygonal profiles, off-center bores) using milling head synchronized to spindle rotation
PAMA's engineering team provides full application engineering support for defining the configuration, tooling strategy, and programming approach for the customer's specific workpieces

Limitations

Price of $2–5M and extremely specialized capability makes the Speedturn appropriate only for manufacturers with a consistent workload of large-format rotor and shaft components
Configured-to-order nature means there is no standard machine to evaluate — specification requires detailed workpiece analysis and close collaboration with PAMA's engineers
Installation projects of 24–36 months from order to acceptance are typical — the Speedturn is a long-term capital investment, not a near-term capacity solution
Machine weight of 200,000–500,000 kg demands purpose-engineered foundations and building structures — facility costs can rival machine cost
Highly specialized operators and programmers are required — the Speedturn is not a machine where standard machining center skills transfer without significant training

Best For

Power generation OEMs machining large turbine rotor shafts, generator shafts, and compressor rotors requiring integral journal turning and coupling bore machining Oil and gas equipment manufacturers producing large compressor rotors, blowout preventer housings, and Christmas tree assemblies requiring combined turning and boring in one setup Marine engineering companies producing large propulsion shafts, rudder stocks, and stern tube assemblies requiring turned journals plus precision bored flanges Aerospace manufacturers producing large structural components combining turned outer diameters with bored attachment interfaces Contract manufacturers specializing in large rotor and shaft machining for energy, oil and gas, and marine customers

Frequently Asked Questions

01 What is the primary advantage of turn-milling vs. separate lathe and boring mill operations?

When a large rotor shaft is machined on a lathe first and then moved to a boring mill for cross-bores and face features, the repositioning introduces geometric errors — typically 0.01–0.05 mm or more — from clamping variation, fixture deflection, and thermal changes during the part transfer. These errors directly affect journal-to-bore concentricity, flange face perpendicularity to the shaft axis, and bore pattern accuracy relative to the turned features. The Speedturn eliminates these repositioning errors by completing all operations in a single setup, which is often the only way to achieve the concentricity tolerances required on high-speed rotating machinery.

02 What is synchronized turning on the Speedturn?

Synchronized turning (also called turn-milling or contouring turning) uses the milling head's rotation synchronized electronically to the main spindle's rotation to machine features that are not rotationally symmetric — such as polygon profiles, eccentric bores, and cam shapes — on the outside diameter of a rotating workpiece. The Siemens 840D sl's electronic gearing function coordinates the milling spindle and main spindle precisely so that, from the workpiece's perspective, the milling cutter traces a non-circular path. This replaces external broaching or grinding operations for polygon features.

03 How does PAMA define the configuration for a specific customer application?

PAMA begins with a detailed workpiece analysis — the customer provides drawings of the 3–5 largest, most complex parts expected to run on the machine. PAMA's application engineers determine: minimum and maximum turning diameter (sets swing), maximum length between centers, maximum workpiece weight (sets spindle torque and support system), required boring spindle diameter (sets milling capability), and axis travels needed to reach all features. The resulting configuration specification is reviewed jointly before machine design begins. Budget 4–8 weeks for this engineering phase.

04 What sectors are typical buyers of the PAMA Speedturn?

The primary Speedturn buyers are: power generation OEMs (Siemens Energy, GE Vernova, Ansaldo) producing turbine shafts; oil and gas equipment builders (Baker Hughes, TechnipFMC, NOV) producing large compressor and valve components; marine engineering companies (MAN Energy Solutions, Rolls-Royce Marine) producing propulsion shafts; and large contract manufacturers serving these sectors in Italy, Germany, South Korea, Japan, and the United States.