Eurotech Kobra

7-axis hybrid Swiss-type lathe, Y2 available on all models

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Overview

Runs with or without a guide bushing, with Y2 back working on every size

The Kobra is Eurotech's 7-axis hybrid Swiss-type lathe, built as the 12, 20 and 25 SLY-X. It converts between guide bushing and non-guide bushing work, and with the optional rough material bushing the bar remnant can be as short as 1.97 in (50 mm), depending on part length. The 25 SLY-X takes bar up to 1.02 in (26 mm), runs its main spindle to 8,000 rpm and carries 25 tools standard, up to 38 with modular live tooling. A Y2 axis on the sub-spindle is available on all three models for more back working.

Guide: Swiss-type lathe or conventional CNC lathe: which fits your parts?

At a glance

Bar capacity: Up to 1.02 in
Main spindle: 8,000 rpm (25 SLY-X)
Tool positions: 25 standard, up to 38 with modular live tools
Axes: 7, Y2 optional on all models
Control: Mitsubishi M80

Features

01Hybrid guide bushing setupThe Kobra converts between guide bushing and non-guide bushing work and takes any major brand of guide bushing and collet. With the optional rough material bushing, bar remnant drops from 150 mm to 50 mm (1.97 in), depending on part length.
02Hydraulic disc brake and clampingA hydraulic disc brake takes stress off the C-axis during milling and drilling and lets the machine remove more material when milling. Hydraulic cylinder clamping adds clamp force for I.D. work and reduces bar pushback.
0325 tools, up to 38 with modular holders25 tool positions standard, up to 38 depending on the modular live-tool configuration. Modular holders include a thread whirling device, saw blade seat, polygon milling holder and off-center driven holders.
04Mitsubishi M80 controlThe Kobra runs Mitsubishi's M80 CNC, and Eurotech covers the control for 3 years, parts and labor. Mitsubishi's vibration cutting vibrates the feed axis to break chips small, and chip breaking software is listed as an optional accessory.

05Cross-travel sub-spindleMain spindle and sub-spindle both have fully programmable C-axis. With the cross-travel sub-spindle, main and sub can work one at a time or simultaneously to shorten machining time, for front and rear machining on one machine.
06Y2 option on every modelAn optional Y2 axis on the sub-spindle adds a radial drilling tool holder for back working. Eurotech offers it on the 12, 20 and 25.

Video

Kobra X 25, dual-spindle Swiss-type lathe

Specifications

Item		Kobra series
Item		Kobra 12 SLY-X	Kobra 20 SLY-X	Kobra 25 SLY-X
Series
Axes		7	7	7
Y2 axis on sub-spindle		Opt.	Opt.	Opt.
Control		Mitsubishi M80	Mitsubishi M80	Mitsubishi M80
Working range
Max. turning dia.mm (in)	mm (in)	-	-	26 (1.02)
Max. machining length per chuckingmm (in)	mm (in)	-	-	200 (7.87)
Max. drilling dia. (main spindle)in	in	-	-	0.39
Max. drilling dia. (sub spindle)in	in	-	-	0.28
Max. tapping dia. (main spindle)		-	-	M8
Max. tapping dia. (sub spindle)		-	-	M9
Tooling
O.D. tooling, number of tools		-	-	6
O.D. tooling, dimensionin	in	-	-	0.47 x 0.47 x 4.7
I.D. tooling, number of tools		-	-	4
I.D. tooling, dimension		-	-	0.39 in (ER16)
Cross working driven tooling, number of tools		-	-	2 + 3
Cross working driven tooling, dimension		-	-	0.39 in (ER16)
Cross working driven tooling, speedrpm	rpm	-	-	200 to 6,000
Front working driven tooling, number of tools		-	-	3
Front working driven tooling, dimension		-	-	0.39 in (ER16), tooling opt.
Front working driven tooling, speedrpm	rpm	-	-	200 to 6,000
Back I.D. tooling, number of tools		-	-	4 + 4
Back I.D. tooling, dimension		-	-	0.39 in (ER16)
Back working driven tooling, number of tools		-	-	4 (opt.)
Back working driven tooling, dimension		-	-	0.39 in (ER16), tooling opt.
Back working driven tooling, speedrpm	rpm	-	-	5,000
Main spindle
Spindle hole dia.mm (in)	mm (in)	-	-	27 (1.06)
Spindle speedrpm	rpm	-	-	200 to 8,000
Indexing angle		-	-	C-axis
Sub spindle
Spindle hole dia.mm (in)	mm (in)	-	-	27 (1.06)
Spindle speedrpm	rpm	-	-	200 to 6,000
Spindle speed, opt. built-in motorrpm	rpm	-	-	200 to 8,000
Max. length for front ejectionin	in	-	-	2.0
Indexing angle		-	-	C-axis
Rapid traverse
X1, Y1, Z1, X2, Z2in/min (m/min)	in/min (m/min)	-	-	1,181 (30)
Motors
Main spindle motorHP	HP	-	-	7.4
Sub spindle motorHP	HP	-	-	7.4
Y1, Z1, X2, Z2 axes motorHP	HP	-	-	1.3
Y2 axis motor (opt.)HP	HP	-	-	1.3
Coolant pump motorHP	HP	-	-	1
Lubrication motorW	W	-	-	4
Cross driven tool motorHP	HP	-	-	3.0
Back driven tool motorHP	HP	-	-	2.0
Y2 axis 2 / back driven tool motor (opt.)HP	HP	-	-	3.0
Machine dimensions
Center heightin	in	-	-	35.0
Weightlb	lb	-	-	4,784
Weight, opt. Y2 axislb	lb	-	-	5,622
Machine dimensionsin	in	-	-	96.1 x 57.1 x 65.0
Machine dimensions, opt. Y2 axisin	in	-	-	105.9 x 58.9 x 74.4
Air
Air pressurekg/cm	kg/cm	-	-	5
Air supplygal/min	gal/min	-	-	2.6

Specifications from the manufacturer, converted from metric. Confirm the configuration on your quote.

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