Tsugami S257
Key Specifications
Rapid Traverse
Accuracy
Repeatability
max bar capacity
main spindle speed
sub spindle speed
Overview
The Tsugami S257 is a 25 mm Swiss-type automatic lathe with a 7-axis configuration, combining the S-series emphasis on throughput with the additional axis flexibility needed for more complex part geometries. At 25 mm bar capacity, the S257 sits at a practical crossover point between entry-level Swiss-type work and the complexity demands of medical, aerospace, and precision automotive production. The seven-axis layout adds Y-axis or B-axis capability to the base S-series platform, enabling off-center milling and angular drilling in a package that retains the S-series compact footprint and fast cycle-time focus.
The main spindle on the S257 runs to 10,000 RPM with 3.7 kW (5 hp) of power — a step up from the smaller S206 to accommodate the larger bar diameter and the harder materials common in 25 mm Swiss-type applications. Sub-spindle speed is 10,000 RPM, matching the main spindle for back-working operations. Tool capacity reaches 24 to 28 stations in the 7-axis configuration, providing enough positions for comprehensive front-work, back-work, and secondary milling operations on moderately complex parts.
The guide bushing system supports the 25 mm bar throughout the cutting zone, a critical feature for long slender parts in medical and instrumentation applications where part length-to-diameter ratios routinely exceed 10:1. The optional non-guide bushing conversion kit is available for shorter runs where material savings justify the setup adjustment.
Fanuc 32i-B control is standard across the S-series. Pricing for the S257 falls in the $175,000 to $235,000 range. Direct competitors include the Citizen M32, Star SV-20, and Hanwha XD26 II — though the Tsugami S257 differentiates through its 7-axis configuration within the S-series speed-focused platform.
Full Specifications
| Parameter | Value |
|---|---|
| Max Bar Capacity | 25 mm (0.984 in) |
| Main Spindle Speed | 10,000 RPM |
| Sub Spindle Speed | 10,000 RPM |
| Main Spindle Power | 3.7 kW (5 hp) |
| Number Of Axes | 7 axes (including Y-axis) |
| Tool Stations | Up to 28 tools |
| Guide Bushing | Standard (removable for non-guide bushing mode) |
| Travel X1 | 28 mm (1.10 in) |
| Travel Z1 | 200 mm (7.87 in) |
| Travel X2 | 28 mm (1.10 in) |
| Travel Z2 | 95 mm (3.74 in) |
| Rapid Traverse Rate | 32 m/min (1,260 ipm) |
| Positioning Accuracy | ±0.003 mm |
| Repeatability | ±0.002 mm |
| CNC Control | Fanuc 32i-B |
| Machine Weight | 2,300 kg (5,071 lb) |
| Schedule | April 13(mon.) to 17(Fri.), 2026 |
| Venue | KINTEX |
| Booth No | 03B200 |
| February 20 2026 | SIMTOS 2026 |
| March 03 2026 | Notice of Status of Acquisition of Treasury Shares |
| February 03 2026 | Notice of Status of Acquisition of Treasury Shares |
| January 30 2026 | Consolidated Financial Results for the Nine Months Ended December 31, 2025 |
| January 06 2026 | Notice of Status of Acquisition of Treasury Shares |
| December 02 2025 | Notice of Status of Acquisition of Treasury Shares |
| November 13 2025 | Consolidated Financial Results for the Six Months Ended September 30, 2025 (Under IFRS) |
| November 05 2025 | Notice of Status of Acquisition of Treasury Shares |
| October 17 2025 | Notice of Revisions to Consolidated Financial Results Forecasts for the Six Months Ended September 30, 2025 and Interim Dividend Forecasts |
| October 02 2025 | Notice of Status of Acquisition of Treasury Shares |
| September 02 2025 | Notice of Status of Acquisition of Treasury Shares |
| August 04 2025 | Notice of Status of Acquisition of Treasury Shares |
| July 30 2025 | Consolidated Financial Results for the Three Months Ended June 30, 2025 (Under IFRS) |
| July 18 2025 | Notice of Completion and Result of Acquisition of Treasury Shares, and Decision on Matters Relating to Acquisition of Treasury Shares |
| July 11 2025 | Notice of Completion of Payment for Disposal of Treasury Shares as Restricted Stock Compensation |
| July 02 2025 | Notice of Status of Acquisition of Treasury Shares |
Specifications sourced from tsugami.co.jp — verified 2026-03-28
Strengths & Limitations
Strengths
- 7-axis configuration with Y-axis adds off-center milling capability to the S-series speed-focused platform — a combination rarely found in competitors at this price point
- 25 mm bar capacity with 10,000 RPM spindle handles the medical and aerospace 25 mm part spectrum with good surface speed for a range of materials
- 28-tool capacity provides substantial flexibility for front-work, back-work, and secondary milling without requiring tool changes mid-cycle
- S-series compact footprint with 7-axis capability delivers versatility without the full footprint penalty of B-series machines
- 32 m/min rapid traverse maintains S-series fast cycle times even with the additional axis complexity
- Fanuc 32i-B control provides consistent, well-supported programming environment with 7-axis simultaneous interpolation capability
Limitations
- 25 mm capacity (vs 26 mm on the B0266) limits compatibility with some 26 mm raw material stock sizes; shops should verify material availability
- 3.7 kW spindle is adequate but not generous for aggressive titanium or Inconel roughing at the upper end of the 25 mm diameter range
- 7-axis programming complexity requires experienced Swiss-type programmers — entry-level operators will need training investment
- $175K+ investment requires production commitment; shops with intermittent Swiss-type needs may find lower utilization hurts payback
Best For
Frequently Asked Questions
01
The S257 features a true independent Y-axis linear drive, not X-Z interpolation. A true Y-axis provides greater rigidity for milling operations and simplifies programming for off-center features. This is particularly important for precision medical and aerospace applications where position accuracy for cross-holes and keyways is critical.
02
The B0326 offers 26 mm capacity, up to 27 tools, and optional B-axis for angular drilling, making it better for highly complex parts like bone screws with multiple angled features. The S257 at 25 mm with Y-axis covers the majority of medical Swiss-type work at a lower price point and with the S-series speed advantage for simpler geometries. Shops with a mix of moderate and complex parts may find the S257 handles 80% of their work at lower cost per machine.
03
The Y-axis travel on the S257 is typically ±12 mm, providing sufficient range for most off-center milling operations encountered in medical, automotive, and electronics Swiss-type production. Features requiring Y-axis travel beyond this range are uncommon in the 25 mm part spectrum.
04
Yes. Polygon turning is achievable on the S257 through synchronized spindle and live tool rotation. This capability is used for hex drives on screws and bolts, square shaft ends, and similar features. The Fanuc 32i-B control supports the axis synchronization required for polygon turning. An appropriate polygon turning attachment must be specified at the time of purchase or added later.
05
At a $205,000 average investment with a billing rate of $120-$180 per hour for 25 mm Swiss-type work, a shop running two shifts (approximately 4,000 hours per year) at 75% utilization can generate $360K-$540K in annual revenue. Payback periods of 1.5-3 years are achievable for shops with committed production volume. Medical and aerospace shops typically achieve the higher end of billing rates.
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