Tsugami B038M
Key Specifications
bar capacity
type
guide bushing
tool magazine
tool holder
back tool post
Overview
The Tsugami B038M is a large-capacity sliding headstock automatic lathe that combines Swiss-type turning with built-in machining center capability for 38mm bar stock. This machine bridges the gap between conventional Swiss lathes and dedicated mill-turn centers, giving shops the ability to produce complex turned-and-milled parts in a single setup without sacrificing the precision that Swiss-type architecture is known for.
What sets the B038M apart from standard Swiss lathes is its integrated tool spindle with a 40-tool CAPTO C4 magazine. The CAPTO C4 dual-contact toolholding system delivers the rigidity you'd expect from a dedicated machining center, which means you can take real milling cuts -- not just light engraving passes. The back tool post includes Y-axis capability for simultaneous operation, so your sub-spindle side isn't sitting idle while the main spindle runs.
The 38mm (1.5 in) bar capacity opens up a much wider range of part sizes compared to the more common 20mm and 26mm Swiss platforms. You're looking at parts for hydraulic fittings, medical implant bodies, aerospace connector housings, and automotive drivetrain components that would be too large for smaller Swiss machines but too precise for conventional turning centers.
Tsugami's sliding headstock design with guide bushing support ensures that even at 38mm diameter, you're maintaining the concentricity and surface finish standards that make Swiss-type machines the go-to for precision work. The high-output built-in motor on the tool spindle handles the milling loads without the vibration issues that plague bolt-on live tooling solutions. The FANUC control manages the multi-channel programming needed to coordinate main spindle, sub-spindle, and tool spindle operations for maximum overlap and minimum cycle times.
Full Specifications
| Parameter | Value |
|---|---|
| Bar Capacity | 38 mm (1.5 in) |
| Type | Sliding headstock + machining center hybrid |
| Guide Bushing | Yes (sliding headstock) |
| Tool Magazine | 40 tools (CAPTO C4 dual contact) |
| Tool Holder | CAPTO C4 |
| Back Tool Post | Y-axis capable |
| Tool Spindle | High-output built-in motor |
| CNC Control | FANUC |
Specifications sourced from tsugami.co.jp — verified 2026-03-28
Strengths & Limitations
Strengths
- 40-tool CAPTO C4 magazine provides machining center-grade rigidity and tool variety on a Swiss-type platform
- 38mm bar capacity covers a wider range of part sizes than typical 20-26mm Swiss machines
- Back tool post with Y-axis enables simultaneous main and sub-spindle operations for shorter cycle times
- Built-in motor tool spindle eliminates vibration from belt-driven or gear-driven live tooling alternatives
- Sliding headstock with guide bushing maintains Swiss-type precision on longer parts with high L/D ratios
- CAPTO C4 dual-contact toolholding ensures consistent tool positioning and repeat accuracy across tool changes
Limitations
- Higher price point than standard Swiss lathes due to integrated machining center capability
- Multi-channel programming with main spindle, sub-spindle, and tool spindle requires experienced programmers
- Larger footprint than conventional 38mm Swiss lathes due to integrated tool magazine
- Guide bushing operation on 38mm bar stock creates noticeable remnant material costs per bar
Best For
Frequently Asked Questions
01
Both handle 38mm bar stock with integrated milling, but the SS38MH-5AX adds true 5-axis simultaneous B-axis capability with a 20,000 RPM tool spindle. The B038M uses a CAPTO C4 tool spindle without B-axis, focusing on indexed milling positions rather than continuous 5-axis contouring. The B038M is the better value if you don't need 5-axis simultaneous control.
02
CAPTO C4 is a polygon-taper toolholding system that provides exceptional rigidity and repeatability. The dual-contact design (simultaneous face and taper contact) gives you better accuracy and vibration resistance than standard ER collet or BMT tooling. It's the same toolholding system used in high-end mill-turn centers from Sandvik and DMG Mori, which tells you something about the rigidity Tsugami is targeting.
03
The built-in motor tool spindle handles moderate milling loads well -- think cross-holes, flats, slots, and pockets in aluminum, brass, and mild steel. For heavy hogging in stainless or titanium, you'll want to manage expectations on material removal rates. The machine is optimized for precision milling on turned parts, not replacing a standalone machining center.
04
For 38mm bar stock, popular choices include the LNS Alpha 545, IEMCA Elite 220, and FMB Turbo 5-42. The bar feeder should handle up to 42mm capacity to accommodate the full range of bar stock the machine accepts. Hydrodynamic bar feeders are preferred for surface finish quality, though magazine-style feeders work well for higher-volume production.
05
Shops typically report 30-50% cycle time reductions compared to running parts through a separate lathe and machining center. The bigger savings come from eliminating part handling, fixturing time, and the work-in-process inventory between machines. For complex parts with 6+ milled features, the single-setup approach can cut total lead time by 60-70%.
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