News

NEW in our machinery: Two LK 500 gear skiving machines from Liebherr.

To remain innovative and high-performing in the future, we are investing in two modern Liebherr LK 500 gear skiving machines for the production of high-precision gear teeth.

Gear skiving is a highly efficient machining process that combines the advantages of hobbing and shaping. With automatic workpiece change, components up to 500 mm in diameter and module 5 can be manufactured in the highest quality and in large quantities.

Are you looking for free capacities in the field of gear technology? Please feel free to contact us.

Siebenhaar has recently delivered 2 electric driven inclined fall pipe winches for Jan de Nul’s latest multi-purpose vessels.

These winches have a 75 ton line-pull which is intended to position an inclined fall pipe for rock dumping purposes. These winches are provided with 4x100 kW electric motors driving 4 slewing gears which act on a slewing bearing. The winch is capable to perform active heave compensation without the need for hydraulics, compensation cylinders or additional equipment.  Because of this active heave compensation the rock’s are being dumped at the exact location regardless ship’s motions. The drives have this special feature that energy coming back from the system (when load is payed out) the returning energy is fed back to the ship’s power system saving fuel and energy consumption.

Siebenhaar Antriebstechnik GmbH has delivered the winches including the drive and controls as a complete package.

In the last year Siebenhaar Antriebstechnik GmbH delivered six large scaled winches for a Cutter Suction Dredger to Jan De Nul Group. These are the main winches of the ship which are responsible for main lifting appliances.

1x Ladder Winch G6160 WH 04/0
1x Ladder Winch G6160 WH 05/0

The ladder winches, type G6160 WH, are used in the Cutter Suction Dredger for lowering or raising cutter head assemblies (boom systems). Both winches are installed below deck and are differentiated into starboard and port side execution.

Technical data:

2x Spud Hoisting Winch 6180 WF 02/0

The spud hoist winches, type G6180 WF, are used in the Cutter Suction Dredger for lifting and free-fall mode operation of the main anchor spud. 

Free-fall mode: Out of a pre-defined height the spud drops to the sea floor penetrating it i. e. ramming the sea floor.

Lifting mode: In lifting mode the spud can be lowered to pre-defined height or can be pulled out from the ground and lifted to the deck.

Technical data:

1x Side Wire Winch G6180 WH 02/0
1x Side Wire Winch G6180 WH 03/0

The side wire winches, type G6180 WH, are used in the Cutter Suction Dredger for lateral pull movements on the ship used to generate the required lateral feed for the cutter module (milling function). Both winches are installed on the working deck and are differentiated into starboard and port side execution.

Technical data:

Siebenhaar will deliver further winch types for this project in year 2016.

The strategic investigations will be continued in year 2016 like the last years. Two new machines complete our high quality machining park.

These two machines of company DMG Mori Seiki are from their new series: DMU 105 FD and a DMC 160 FD. The FD in their designation is for German words “Fräsen-Drehen“ (milling-turning), that means these machines can cover any machining step like turning, milling and drilling. They can machine parts with a diameter of 1250mm and 1530mm. The combined function of this machines enable a complete machining for many parts without changing the machine, which leads to reduction of setup times and increases our manufacturing precision.

Commissioned by Van Haagen Kraanbouw  Siebenhaar Antriebstechnik has developed and build the winch system for a very large gantry crane in Szczecin (Poland) with a lifting height of more than 100m, a span of 50m and a total lifting capacity of 1,400 tons. This makes it Europe's largest crane of its kind. The crane is used for building, loading and unloading windmill foundation inserts. The main specifications of this gantry crane are: Altitude 120m, lifting height more than 100m, 50m span, total lifting capacity of 1,400 tons (4 × 350 tonnes). The winches are placed at the bottom of the undercarriage. The winches are capable to work with very high speeds to be able to spool on / off a large amount of steel wire rope. The winches are driven by electric motors with a speed of 4500 / 5000 rpm, 200kW. The winches  have a line pull of 42T with a rope storage capacity of 1050 m which is spooled on a special parallel grooved pattern in multiple layers.

This year we celebrate our 50th anniversary since the founding of Siebenhaar Antriebstechnik back in 1965.

To all our customers and suppliers we thank you for your successful cooperation. Together with our existing and future business partners we are looking forward to many more years to follow.

From August 2015 Siebenhaar Drive Technologies delivers its first free-fall winch Type 4099 WF featuring a maximum wire drive of 45t in normal operation and 22.5t in free-fall mode.

For the first winch the field of use will be a crawler crane operation.

We welcome the newest member of our ultra-modern machinery! It is a Liebherr LC 380 hobbing machine with automatic workpiece feed. Workpieces can be machined up to a maximum diameter of 380mm and up to Module 7.

Just in time for the Sochi 2014 Winter Olympic Games, Russia opened its first large and modern leisure park. One of the most spectacular attractions of the Sochi Leisure Park was made possible by a Siebenhaar rope winch size 4100 WH. One hoist equipped with safety disc brakes for each of the two towers is used to pull up the car, then it is shot from the free fall and, following several looping repeats, it is pulled up on the other tower.