Okuma 2SP-150H
Key Specifications
Rapid Traverse
Max Turn Length
Accuracy
Repeatability
max turning diameter
main spindle speed
Overview
The Okuma 2SP-150H is a twin-spindle CNC chucker designed for high-volume production of small parts requiring simultaneous front-and-back machining. The '2SP' designation identifies it as a dual-spindle configuration, while the 'H' denotes a horizontal layout. Unlike the LT and LU series which are designed for general-purpose turning, the 2SP-150H is a dedicated production machine optimized for short-cycle chucking work where throughput is the primary metric.
Max chuck size is 6 inches (150 mm), giving the machine its model number. Each spindle operates independently, allowing the machine to turn one part on the main spindle while simultaneously machining the back side of a previously completed part on the sub-spindle. This overlapping cycle architecture means the effective cycle time approaches half of what a single-spindle machine would require.
The main spindle delivers 11/7.5 kW (15/10 hp) at up to 6,000 RPM. The sub-spindle matches at 11/7.5 kW (15/10 hp) and 6,000 RPM. Both spindles use A2-5 connections. The machine carries a 12-station turret with BMT mounting for driven tools at up to 6,000 RPM, plus a dedicated gang tool station for the sub-spindle.
Rapid traverse rates are aggressive at 30 m/min on X and 36 m/min on Z, minimizing non-cutting time. The machine weighs approximately 3,800 kg (8,378 lb) and has a compact footprint designed for integration into automated production cells with gantry loaders or robotic part handling.
Okuma's OSP-P300L control handles the twin-spindle synchronization, part transfer, and cycle overlap programming. Thermo-Friendly Concept maintains accuracy during extended production runs. The 2SP-150H competes with the Doosan Lynx 2100LSY, Nakamura-Tome SC-100/200, and Hardinge Conquest T42SP in the dedicated twin-spindle chucker segment. Specs sourced from Okuma published data.
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | Ø150 <Ø220> |
| Max Turning Length | 80 <150> |
| Main Spindle Speed | 6,000 RPM |
| Main Spindle Power | 11/7.5 kW (15/10 hp) |
| Sub Spindle Speed | 6,000 RPM |
| Sub Spindle Power | 11/7.5 kW (15/10 hp) |
| Spindle Nose | A2-5 |
| Chuck Size | 6 in (150 mm) |
| Turret Stations | 12 (BMT mounting) |
| Driven Tool Speed | 6,000 RPM |
| Rapid Traverse Rate | 30 m/min X, 36 m/min Z |
| Positioning Accuracy | ±0.004 mm |
| Repeatability | ±0.002 mm |
| Machine Weight | 3,800 kg (8,378 lb) |
| CNC Control | Okuma OSP-P300L |
| Speed Range | 50 ~ 4,500 |
| Standard Power | 11/7.5 |
| Rapid Traverse Xz | 24 |
| Okuma Global Repair Center | Charlotte, North Carolina |
| Inches | Metric |
| Spindle Nose Type | 140 flat |
Specifications sourced from okuma.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Overlapping cycle architecture effectively halves cycle time compared to single-spindle machines on qualifying parts
- 6,000 RPM on both spindles enables high-speed finishing on aluminum, brass, and steel small parts
- Compact footprint designed for automated production cells with gantry loaders or robots
- BMT driven tools at 6,000 RPM provide mill-turn capability for complex small part features
- Fast rapids (30/36 m/min) minimize non-cutting time for maximum throughput
- Thermo-Friendly Concept maintains accuracy during extended high-volume production runs
Limitations
- 6-inch chuck and 200 mm turning diameter limit work to small parts only
- 150 mm max turning length restricts part length; longer parts need a different machine
- No bar-through capability; this is a chucker, not a bar machine
- Starting at $160K, the investment requires high production volumes to justify over a general-purpose lathe
- Programming overlapping twin-spindle cycles requires specialized skills and careful cycle optimization
Best For
Frequently Asked Questions
01
New 2SP-150H machines run $160,000-$240,000 depending on configuration. Base twin-spindle setups start around $160,000-$185,000. Full configurations with driven tools and automation integration reach $210,000-$240,000. Used machines from 2015-2020 sell for $80,000-$130,000.
02
While the turret machines the front side of Part A on the main spindle, the sub-spindle simultaneously machines the back side of Part B (which was previously transferred from the main spindle). When both operations complete, Part B is ejected as finished, Part A transfers to the sub-spindle for back machining, and a new blank loads into the main spindle. This overlap means the effective cycle time equals the longer of the two operations, not the sum.
03
No. The 2SP-150H is a chucker—it loads individual blanks or pre-cut billets, not bar stock through the spindle bore. For bar-fed production of small parts, look at the Okuma LU-S1600 or LT2000 EX instead.
04
The compact footprint is designed for gantry loader integration, which Okuma offers as a factory option. Collaborative robots and dedicated part loading robots also work well. The machine's control includes automation interface protocols for handshaking with external loaders and conveyors.
05
The LU-S1600 has twin turrets plus twin spindles, providing more tool stations (20 vs 12) and the ability to cut with both turrets simultaneously. The 2SP-150H focuses on overlapping cycles between its two spindles sharing one turret. The LU-S1600 handles bar stock; the 2SP-150H is a chucker. Choose based on whether your parts come from bar stock or pre-cut blanks.
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