Starrag Bumotec s181

Est. $500,000 - $800,000 Specs verified 2026-10-03 · starrag.com Updated 2026-10-03

Image: d33jv2lquzij6s.cloudfront.net, Starrag

Key Specifications

X Travel

490 mm (19.3 in)

Y Travel

160 mm (6.3 in)

Z Travel

430 mm (16.9 in)

Tool Capacity

30 standard (60 or 90 optional)

Rapid Traverse

40 m/min (1,575 ipm)

simultaneous axes

5-axis simultaneous

How much does the Starrag Bumotec s181 cost?

Estimated price range

Est.$500,000 - $800,000

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 s181 is a dual-station 5-axis simultaneous machining center with travels of 490 mm (19.3 in) in X, 160 mm (6.3 in) in Y and 430 mm (16.9 in) in Z. Its defining feature is the layout: Starrag lists 2 machining stations, so the long X stroke is shared between two working positions and is not given over to one large part.

Read the envelope with that in mind. Y is only 160 mm (6.3 in), about a third of X, which points to small, complex components worked from several sides. Axis motion is quick, with 40 m/min (1,575 ipm) rapids and 8 m/s² (0.9 g) of acceleration, and the axis resolution is listed at 0.0125 µm. On parts with many short moves, acceleration counts for more than the rapid figure because the axes rarely reach top speed. The Bumotec s191V trades the other way, with 400 mm (15.7 in) of X, 200 mm (7.9 in) of Y and a 50 mm (1.97 in) bar capacity.

The milling spindle is light. Power is 5 kW in S1 and 6 kW in S6, on an HSK-E40 or HSK-T40 interface with 11 kN of clamping force. The two interfaces are listed as alternatives, so confirm which one a given machine carries before buying holders. Starrag's table does not list a spindle speed or torque for this model.

Thirty tools are standard, with 60 or 90 optional, and the maximum tool length is 120 mm. Through-spindle coolant at 100 bar is an option. The control is a Fanuc 31i-B5 with a 15-inch panel, and the machine weighs 5,000 kg (11,023 lb).

Full Specifications

Parameter	Value
X-Axis Travel	490 mm (19.3 in)
Y-Axis Travel	160 mm (6.3 in)
Z-Axis Travel	430 mm (16.9 in)
Simultaneous Axes	5-axis simultaneous
Rapid Traverse Rate	40 m/min (1,575 ipm)
Acceleration	8 m/s² (0.9 g)
Axis Resolution	0.0125 µm
Milling Spindle Power	S1/S6 = 5/6 kW
Milling Spindle Taper	HSK-E40 / HSK-T40
Milling Spindle Clamping Force	11 kN
Through Spindle Coolant	100 bar (optional)
Tool Capacity	30 standard (60 or 90 optional)
Max Tool Length	120 mm
Stations	2 machining stations (dual-station)
CNC Control	Fanuc 31i-B5
Display	15-inch panel
Machine Weight	5,000 kg (11,023 lb)

Specifications sourced from starrag.com — verified 2026-10-03

Strengths & Limitations

Strengths

2 machining stations (dual-station) within 490 mm (19.3 in) of X travel
40 m/min (1,575 ipm) rapids with 8 m/s² (0.9 g) of acceleration
Axis resolution listed at 0.0125 µm
30 tools standard, with 60 or 90 available as options
Choice of HSK-E40 or HSK-T40 spindle interface with 11 kN of clamping force

Limitations

Milling spindle power is 5 kW (S1) and 6 kW (S6), which limits metal removal rates
Y travel is 160 mm (6.3 in), so the envelope suits narrow parts only
Maximum tool length is 120 mm, restricting deep-reach tooling
Through-spindle coolant at 100 bar is optional, as are the larger magazines
No spindle speed or torque is given in Starrag's table for this model

Best For

Small complex parts machined across two stations Narrow workpieces that fit 160 mm (6.3 in) of Y travel Light, fast cutting with tools up to 120 mm long Jobs with many short positioning moves, helped by 8 m/s² of acceleration

Frequently Asked Questions

01 What does dual-station mean on the Bumotec s181?

Starrag lists the s181 with 2 machining stations. The table does not describe how the stations are arranged or what each one does, only that there are two within travels of 490 mm (19.3 in) in X, 160 mm (6.3 in) in Y and 430 mm (16.9 in) in Z. Ask Starrag how the stations would be equipped for your part.

02 How powerful is the Bumotec s181 milling spindle?

It is rated 5 kW in S1 and 6 kW in S6, with an HSK-E40 or HSK-T40 interface and 11 kN of clamping force. Spindle speed and torque are not listed in Starrag's table, so confirm both before planning cutting data.

03 How many tools does the Bumotec s181 hold?

30 tools as standard, with 60 or 90 available as options. The maximum tool length is 120 mm, which applies whichever magazine is fitted.

04 Is through-spindle coolant standard on the Bumotec s181?

No. Through-spindle coolant is listed at 100 bar as an option. If the work involves deep drilling or small tools that depend on coolant through the tool, make sure it is on the order.

05 How does the Bumotec s181 compare with the Bumotec s191V?

The Bumotec s191V has 400 mm (15.7 in) of X, 200 mm (7.9 in) of Y and 410 mm (16.1 in) of Z with 50 m/min (1,969 ipm) rapids and a 50 mm (1.97 in) bar capacity. The s181 is longer in X at 490 mm (19.3 in), narrower in Y at 160 mm (6.3 in), and is built around its two machining stations.