Unimat 08-16/4S

Unimat 08-16/4S

Switch/Production Tamping Machine

More information
Conventional lines
Heavy haul
High speed
Field of application
Working mode
Cyclic action


  • Split head tamping unit design for turnout tamping with three-point auxiliary turnout lifting system achieving high working quality and lowering long-term maintenance costs
  • Optional tilting tools if required for special conditions
  • PLC touch screen controls for easy diagnoses and trouble shooting
  • Automatic Geometry Guidance System (AGGS) and Automated Tie Locating and Analyzing System (ATLAS)
  • Powerful lifting device for manipulating large concrete or wood-tie switches enhancing the taming quality in a switch and reducing the overall maintenance demand
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The UNIMAT 08-16/4S is a heavy-duty, high performance, production and switch tamping machine. The machine is equipped with four individual tamping units, each mounted in its own slide frame, supported in a rotating sub frame on the main frame. The machine is also fitted with a combination rail clamp for switch and production tamping as well as Plasser’s unique three-point integrated auxiliary turn-out lifting system for switch and interlocking work. The UNIMAT 08-16/4S is one of the most versatile tamping machines available.

The UNIMAT 08-16/4S is standard equipped with Plasser’s PLC CAN bus control system and AGGS lifting leveling and lining systems. Touch screen monitors allow quick access to all machine functions. The integrated diagnostic system assists the operator with effective trouble shooting.

The Plasser UNIMAT 08-16/4S utilizes design concepts and components that have been well proven worldwide. The machine is constructed for ease of operation and maintenance.

Tamping Units

The Tamping Unit consists of four, 4-tool, non-synchronous, split tamping heads with vibratory hydraulic squeeze system. Each tamping unit is mounted in a laterally adjustable slide frame. Each of the four tamping units can be individually raised and lowered, shifted laterally, and have a (+/- 8.5 degrees) rotation of the tamping unit’s sub-frame. This allows maximum flexibility for complete switch tamping including tamping on each side of the frog simultaneously. The two outside tamping tools on each tamping unit, can be tilted and thereby increase the machines versatility while tamping a switch.  When using the machine as a production tamper, all four units are raised and lowered in unison, providing the same thorough tamping action for which all Plasser tampers are known.

Track Lifting and Lining Unit

A heavy-duty, combination track-lifting and -lining clamp provides for complete switch and plain track production work. The 2X DYNACAT is equipped with two large lifting and two large lining cylinders. Each rail is lined by two flanged rollers. Lifting is carried out by roller lifting clamps gripping the rail head whereby the rollers can remain closed during forward motion, depending upon the track design, or can be opened and closed automatically. In switches and crossings, the lifting hook is applied. The rail hook is guided to the rails from the outside and grips either the rail head or the rail base. The well-proven third rail lifting assembly is included for lifting turnouts.

Integrated Auxiliary Turn-out Lifting System

The Plasser Integrated Auxiliary Turn-out Lifting System consists of a hydraulically-operated, telescopic, auxiliary-track-lifting clamp mounted on each side of the machine adjacent to the main track-lifting clamp. These clamp assemblies provide a precisely controlled lift of the outside turn-out rail during switch-tamping operations. The auxiliary clamps are controlled from the operator's cabin, with the amount of lift determined automatically by the machine's electronic surfacing and cross-level control system. The use of the system during switch tamping operations greatly reduces stress applied to rail fasteners, ties and rails, and applies uniform lift at three points in the long tie areas of switches. The need for cumbersome, manually placed track jacks, hydraulic hose reels, and the related maintenance cost is eliminated. Labor costs can be reduced; and safety hazards associated with the placement and operation of conventional track jacks during switch-tamping operations are eliminated. Due to the system's integrated design and its lifting function that coincides with main machine operations, overall performance is greatly enhanced.

Technical data Unimat 08-16/4S

Pro­duc­tion rate up to 2 200 feet/hour
Length 67' 3''  
Width 10'  
Height 11' 3''  
Weight 137 500 lb
Wheel Diameter 28''  
Engine Power 440 HP
Travel Speed 50 mph