Nakamura-Tome SC-300L2
Key Specifications
Maximum Chuck Diameter
Maximum Turning Diameter
Maximum Turning Length
Maximum Bar Capacity
Main Spindle Speed (Max)
Main Spindle Power
Overview
The Nakamura-Tome SC-300L2 is a large-diameter single-spindle turning and milling center designed for shaft and chuck work that exceeds the capacity of Nakamura-Tome medium-bore platforms. With a maximum turning diameter of 560 mm and a turning length extending to 1,500 mm, the SC-300L2 addresses the needs of energy sector, aerospace, and heavy industrial manufacturers who regularly machine flanges, valve bodies, impellers, and large transmission shafts.
The SC-300L2 is built around a 300 mm chuck main spindle rated at 37 kW continuous power, backed by a high-torque gearbox to deliver cutting torque at low rpm suitable for heavy roughing of large-diameter forgings and castings. The 12-station live-tooling turret provides milling and drilling capability to 7.5 kW, with a Y-axis stroke of +/-75 mm enabling substantial off-center features such as bolt circles, keyways, and angled ports that would otherwise require a separate vertical machining center operation.
Nakamura-Tome designed the SC-300L2 with a long Z-axis travel to accommodate shaft-type work supported between chuck and tailstock, making it a genuine alternative to a separate shaft lathe for components that also need milled features. The sub-spindle option (SC-300L2S) adds a 22 kW rear spindle for automatic part transfer and complete back-end machining without re-chucking. The NT Smart X control manages the full range of turning, milling, and sub-spindle operations from a single FANUC 31i-B platform.
The SC-300L2 competes directly with DMG Mori CTX beta 2000 and Mazak Integrex i-400 class machines, making it a credible choice for shops that favor Nakamura-Tome ergonomics and the NT Smart X control environment. Its combination of large work envelope, high torque, and live tooling milling makes it a versatile single-machine solution for complex large turned parts.
Full Specifications
| Parameter | Value |
|---|---|
| Maximum Chuck Diameter | 300 mm (12 in) |
| Maximum Turning Diameter | 560 mm |
| Maximum Turning Length | 1,500 mm |
| Maximum Bar Capacity | 102 mm (4 in) |
| Main Spindle Speed (Max) | 3,500 rpm |
| Main Spindle Power | 37 kW |
| Main Spindle Torque (Max) | 1,200 Nm |
| Number Of Turret Stations | 12 |
| Live Tooling Speed (Max) | 6,000 rpm |
| Live Tooling Power | 7.5 kW |
| Y-Axis Stroke | +/-75 mm |
| Tailstock | CNC programmable |
| Control | FANUC 31i-B (NT Smart X) |
Specifications sourced from nakamura-tome.co.jp — verified 2026-03-28
Strengths & Limitations
Strengths
- Large 560 mm turning diameter and 1,500 mm turning length cover substantial shaft and flange work in a single machine
- High-torque main spindle (1,200 Nm) handles heavy roughing of large forgings and castings without stalling
- Extended Y-axis (+/-75 mm) enables significant off-center features without a separate VMC operation
- Optional sub-spindle variant (SC-300L2S) enables complete two-end machining of long shafts
- NT Smart X control with FANUC 31i-B provides familiar, capable programming environment
Limitations
- Single-turret architecture limits concurrent cutting capability compared to twin-turret competitors
- High capital investment relative to simpler large-bore turning centers without milling capability
- Large machine weight and footprint demand a reinforced foundation and significant floor space
Best For
Frequently Asked Questions
01
The SC-200L2 is designed for 200 mm chuck work and smaller-diameter turning up to approximately 400 mm. The SC-300L2 steps up to 300 mm chuck, 560 mm turning diameter, and 1,500 mm length, addressing larger shaft and flange components typical in energy, aerospace, and heavy industrial applications.
02
Yes. The SC-300L2 includes a CNC programmable tailstock that supports shaft-type components between chuck and center, enabling heavy-duty turning of long shafts without tailstock position compromising programmable operations.
03
Yes. The SC-300L2S variant adds a 22 kW sub-spindle for automatic workpiece transfer and complete back-end machining. This eliminates re-chucking for two-end shaft work and enables unattended complete machining of shorter shaft components.
04
The SC-300L2 provides +/-75 mm of Y-axis travel on the turret, enabling substantial off-center milling such as large bolt circle patterns, keyways, and radial ports on large-diameter flanges and valve bodies.
05
The SC-300L2 is most commonly found in oil and gas equipment manufacturing, aerospace structural component shops, power generation (turbine shaft and flange work), and heavy industrial contract shops processing large forgings and castings.
Community Discussions
Community discussion — Nakamura Tome SC-300 1996 - Practical Machinist
Community discussion — Nakamura SC-300 Turret only manually indexes at X-home position
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Community discussion — Nakamura-TOME Chip breaking - Practical Machinist
Community discussion — Nakamura SC-300 Manual turret index X-axis must be at home ...
Community discussion — Search Results - CNCzone.com- Largest Forums for CNC ...
Community discussion — Need Help! Nakamura-Tome sc300 - cnczone.com
Community discussion — Nakamura SC300 toolholders - cnczone.com
Owner experience and review — New machine choices : r/Machinists - Reddit
Options and configuration advice — First time running a program/cutting air on my “new” ‘96 ...$200-300 Mini Lathe Recommendations? : r/Machinists - Redditwhat mini mills do you guys recommend? : r/Machinists - Reddit304 Stainless, what the hell am I doing wrong? - Reddit
Options and configuration advice — Small Twin Spindle Lathe : r/Machinists - Reddit
Options and configuration advice — $200-300 Mini Lathe Recommendations? : r/Machinists - Reddit
Links to community discussions. Summaries are editorial — visit the original thread for full context.
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