Tsugami TMA8H
Key Specifications
Max Spindle
Max Turn Length
type
main spindle size
max turning diameter
tool spindle speed
Overview
The Tsugami TMA8H is the high-precision variant in Tsugami's TMA8 multi-tasking turn/mill lineup, built for shops where accuracy requirements go beyond what the standard TMA8J can deliver. It shares the same crossed right-angle slide construction and fundamental architecture but adds linear scales as standard equipment -- a critical upgrade for maintaining tight tolerances over extended production runs.
Like its siblings, the TMA8H handles workpieces up to 220mm turning diameter and 580mm length, with an 8-inch main spindle and 6-inch sub-spindle for complete 6-face machining. The 20,000 RPM tool spindle provides machining center-grade milling capability, while the B-axis enables approach angles for off-axis features. Standard Y-axis control opens up the full range of eccentric drilling, milling, and tapping operations.
Where the TMA8H separates itself is in the accuracy department. The standard linear scales provide direct position feedback that bypasses any thermal growth in the ballscrews, meaning the machine holds its accuracy whether you're on the first part of the day or the five-hundredth. This is particularly important during long production runs where thermal drift can push a standard machine out of tolerance. For medical implant work, aerospace flight hardware, and precision instrument components, that kind of consistency isn't optional -- it's a specification requirement.
Tsugami also offers the TMA8H-YZ variant with linear scales on both the Y and Z axes for even tighter multi-axis accuracy. The crossed right-angle slide design keeps things rigid and thermally stable, while the FANUC control handles the multi-channel programming needed to coordinate main spindle, sub-spindle, and tool spindle operations. For shops that have outgrown the accuracy of their current mill-turn machines, the TMA8H is a logical step up without jumping to a completely different platform.
Full Specifications
| Parameter | Value |
|---|---|
| Type | Multi-tasking turn/mill center (high-precision variant) |
| Main Spindle Size | 8 inch main / 6 inch sub |
| Max Turning Diameter | 220 mm (8.66 in) |
| Max Turning Length | 580 mm (22.83 in) |
| Tool Spindle Speed | 20,000 RPM |
| B Axis | Yes (indexing) |
| Y Axis | Standard |
| Sub Spindle | Standard (6-face machining) |
| Linear Scales | Standard (TMA8H-YZ variant adds Y/Z scales) |
| CNC Control | FANUC |
| Construction | Crossed right-angle slide design |
| Max Spindle Speed | 20,000 min⁻¹ |
Specifications sourced from tsugami.co.jp — verified 2026-03-28
Strengths & Limitations
Strengths
- Standard linear scales provide direct position feedback for maintaining tight tolerances through extended production runs
- 20,000 RPM tool spindle delivers machining center-level milling performance integrated with turning capability
- Crossed right-angle slide construction maximizes rigidity and thermal stability for consistent accuracy
- Sub-spindle standard enables complete 6-face machining without part transfers or secondary setups
- TMA8H-YZ variant available with additional Y and Z axis scales for even higher multi-axis accuracy
- Same platform as TMA8J means shared tooling, fixturing, and programming knowledge across the fleet
Limitations
- B-axis indexing limits complex contoured surface work compared to the full simultaneous B-axis on the TMA8F
- Premium pricing over the TMA8J for the linear scale package may not be justified for general-tolerance work
- Detailed specifications (axis travel, spindle motor, tool magazine size) are less readily available for this variant
- Higher precision components mean higher maintenance costs for scale cleaning, calibration, and replacement
Best For
Frequently Asked Questions
01
The primary difference is linear scales. The TMA8H comes standard with linear scales that provide direct position feedback, bypassing thermal growth and ballscrew wear issues. The TMA8J uses the standard ballscrew encoder feedback. For general-tolerance work (±0.025mm), the TMA8J is fine. For tight-tolerance production (±0.005mm and tighter) over sustained runs, the TMA8H's linear scales make a measurable difference.
02
The TMA8H-YZ adds linear scales to the Y and Z axes in addition to the standard TMA8H scale package. This is for applications where multi-axis positional accuracy matters -- complex angled features, precision bore patterns, and parts with tight position callouts across multiple faces. The additional scales add cost but provide comprehensive position compensation across the working envelope.
03
On a thermally stable machine running short cycles, the difference between scale and encoder feedback is small. Over 4-8 hour production runs, thermal growth in the ballscrews can cause 10-30 microns of drift on a machine without scales. The TMA8H's linear scales compensate for this drift automatically. Shops running tight-tolerance parts in sustained production see the clearest benefit.
04
Yes, the TMA8H handles the full range of engineering materials including stainless steels, titanium alloys, Inconel, aluminum, and engineering plastics. The spindle power and construction are similar across the TMA8 lineup. The TMA8H's advantage is accuracy consistency rather than material capability -- it machines the same materials but holds tighter tolerances over longer runs.
05
Yes, with appropriate setup. The sub-spindle enables complete parts, and the machine can be paired with a bar feeder for unattended bar-fed production. Tool life monitoring, broken tool detection, and part counting are handled through the FANUC control. For chucked work, a gantry loader or robot can be integrated. The linear scales help maintain accuracy during unattended operation by compensating for thermal changes.
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