Screwing

Optimal mounting

Bidirectional Unimog U500 with eight-spindle screw machine (ASM) 30.75.
Bidirectional Unimog U400 with eight-spindle screw machine (ASM) 30.75.

Both of these precision screw machines at PORR allow perfect results when loosening and tightening the rail mounting. The 8-spindle precision screw unit with a bidirectional unimog as a carrier vehicle enables fully automatic, synchronous loosening and tightening of rail fastenings.

Both the quality (through computer-supported recording of the torques achieved) and the performance is above-average compared with conventional screws.

Technical data & Performance parameters

Technical data

	Typ Unimog U400	Typ Unimog U500
Manufacturer (Carrier vehicle)	Mercedes U400, two-way system	Mercedes U500, two-way system
8-spindle precision screwdriver unit	Robel Bahnbaumaschinen GmbH	Robel Bahnbaumaschinen GmbH
Additional equipment, Loading crane	HIAB-Kran XS 144E-3	Palfinger PK 9501
Motor capacity	175 kW / Mercedes Benz	170 kW / Daimler Benz
Total mass, max.	18 t	21 t
Driving speed (road), max.	90 km/h	80 km/h
Driving speed (track), max.	20 km/h	50 km/h
Length over buffers	8.100 mm	6.800 mm
Number of axles	3	2

Performance parameters

	Typ Unimog U400.	Typ Unimog U500
Performance, Screwing	up to 600 m/h	up to 600 m/h
Min. working radius	≥ 60 m	≥ 40 m
Min. driving radius	≥ 60 m	≥ 40 m
Towing capacity, max.	400 t	-
Train control system	No	No
Safety gear change	Yes	No