Starrag Bumotec s128
Key Specifications
Accuracy
Repeatability
machine type
simultaneous axes
operations
bar stock feed
How much does the Starrag Bumotec s128 cost?
Estimated price range
Our best estimate for a 5-axis machining center in this class — not a quote from Starrag. Configuration moves it a long way.
Overview
The Starrag Bumotec s128 is listed as a compact 5-axis multi-technology machining center that turns, mills and drills from automatically fed bar stock. The listed figures are about accuracy, not size: positioning accuracy of ±0.002 mm (±0.00008 in) and repeatability of ±0.001 mm (±0.00004 in).
Those two numbers are backed in the table by direct-scale linear encoders on all axes and active thermal compensation. Scales read the axis position directly instead of inferring it from the drive, and the compensation deals with drift over a long run. For bar-fed work that matters because the first part and the last part of a bar have to match.
What the table leaves out is everything about capacity. It has no travels, no bar diameter, no spindle speed or power and no tool count, so the s128 cannot be sized against a part from this data alone. The control is listed as a Fanuc 31i-B5 with 5-axis simultaneous motion.
Full Specifications
| Parameter | Value |
|---|---|
| Machine Type | Compact 5-axis multi-technology machining center |
| Simultaneous Axes | 5-axis simultaneous |
| Operations | Turning, milling, drilling |
| Bar Stock Feed | Automatic bar feeding |
| Positioning Accuracy | ±0.002 mm (±0.00008 in) |
| Repeatability | ±0.001 mm (±0.00004 in) |
| Linear Encoders | Direct-scale on all axes |
| Thermal Compensation | Active |
| CNC Control | Fanuc 31i-B5 |
Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.
Strengths & Limitations
Strengths
- Positioning accuracy listed at ±0.002 mm (±0.00008 in) with repeatability of ±0.001 mm (±0.00004 in)
- Direct-scale linear encoders on all axes, plus active thermal compensation
- Turning, milling and drilling in one machine, with automatic bar feeding
Limitations
- No travels, bar diameter or workpiece size are listed, so the machine cannot be sized against a part from the table
- Spindle speed, spindle power and tool capacity are not listed
Best For
Frequently Asked Questions
01
The listed figures are ±0.002 mm (±0.00008 in) for positioning accuracy and ±0.001 mm (±0.00004 in) for repeatability. The table also lists direct-scale linear encoders on all axes and active thermal compensation, which are the features that support figures at that level.
02
The table lists turning, milling and drilling with 5-axis simultaneous motion, fed by automatic bar feeding. It is described as a compact 5-axis multi-technology machining center. Bar diameter and part length are not listed, so confirm capacity before planning a part on it.
03
The listed control is a Fanuc 31i-B5. No control options or software packages are given in the table, so anything beyond the base control should be confirmed for the specific machine you are looking at.
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