Gear hobbing machine

LIEBHERR LC 1203

A young Liebherr LC 1203 from the current LC generation: built in 2009, with a motor-driven milling spindle, capable of machining workpieces up to 1200 mm in diameter and weighing 9.5 t, module 20 – the machine for large gear cutting in gearbox manufacturing, wind power, mining, and heavy machinery construction. Serwema Retrofit Solutions, Chemnitz, upgrades the machine to Siemens Sinumerik ONE, the latest control generation with full spare parts and support availability, and delivers it with a new, air-conditioned control cabinet manufactured in-house and a user-friendly interface. The mechanics remain in their well-maintained original condition with original paint – a Liebherr from 2009 does not need a complete overhaul, but a control system that will last for the next 20 years. Delivery time: six months from order.

The machine mills spur and helical gears, as well as shafts up to module 20, in a reinforced version up to module 24, starting from one tooth – therefore also worms and special profiles. With an axial travel of 1000 mm between the milling spindle axis and the table surface, long pinion shafts are securely clamped, and the 900 mm table supports 95 kN. The motor-driven milling spindle rotates from 36 to 360 rpm, the milling head swivels by ±35°, and the tangential travel of 320 mm utilizes the full milling cutter length of 340 mm for long tool life.
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Technical data: max. workpiece diameter 1200 mm, max. workpiece weight approx. 9.5 t (table load 95 kN), table diameter 900 mm, distance between milling spindle axis and table axis 55–780 mm, distance between milling spindle axis and table surface 200–1200 mm, max. module 20/24, min. number of teeth 1, max. milling cutter diameter 280 mm, max. milling cutter length 340 mm, tangential travel 320 mm, milling cutter speed 36–360 rpm, max. table speed 12 rpm, swivel angle ±35°. Dimensions approx. 6.0 × 3.9 × 3.5 m, weight approx. 24 t.

Scope of supply: new Siemens Sinumerik ONE control system with Sinamics S120 drives, air-conditioned control cabinet manufactured in-house, user-friendly interface with Serwema gear cutting software, machine enclosure, magnetic chip conveyor, circulating and loss lubrication, hydraulic unit, coolant system, operating manual. Original color scheme. Acceptance in Chemnitz together with you; a mechanical overhaul or geometry check according to DIN can be offered additionally upon request.

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