Mobile Mounting Documentation System – Full data recordingof residual bolt load, bolt elongation and flange compression

The accessories for the MMDS are aligned to the functions = 100 % system solution.
MMDS figure monitor


  • 100% documented quality of bolt connections
  • Elongation and compression data can berecorded, displayed, memorized, printed and comprised with the integrated computer
  • Increased work safety thanks to frequent pressure and elongation characteristic monitoring
  • Simple, clear and comfortable user interface
  • Data output on customer quality assurance sheets
  • Almost unlimited capability for archiving of tightening procedures
  • Tensioning programs and reports can be transferred via USB or LAN-Access
  • Long service lifetime and user-friendly maintenance intervals
  • Self-monitoring of the MMDS
  • Can be operated in line current or battery mode
  • Can be used with any kind of pump
  • Transportable aluminium case with handle bars

All high-pressure units

Electrohydraulic high-pressure unit for up to 3000 bar in compact design

Electrohydraulic high-pressure pump unit for high flow rates and outputs up to 4000 bar


Mounting Documentation System for controlling and monitoring the axial hydraulic tightening process of bolts.

Mobile Mounting Documentation System

Electro-hydraulic two-circuit high-pressure automatic control system for fully automatic pressing of hubs onto shafts and separating


System for a non-positive connection between shaft and roller ring

Ready-to-use air-hydraulic pump up to 2,500 and 4,000 bar hydraulic pressure

MDS design variants


  • Colour or B+W printer
  • Radio-operated remote controller with display
  • LAN/W-LAN/USB interface
  • Remote access for remote maintenance
  • TMS interface (Tool Management System)
  • TSI interface (Tool Service Indicator)
  • Radio-operated sensors
  • Sensors integrated in the bolt tensioners or supplied
  • separately
  • Central specification of bolting data via SAP interface, database, USB interface or copy and paste
  • 1-3K design type for separate control of multiple independent pressure circuits
  • Rotation angle and torque control for bolt tensioners with automated motorised re-tightening function
  • Optional colour coding of the used equipment

Areas of Application

SCHAAF MMDS is ideally suited for:
  • Generating a bolt pre-tensioning force for which 100% operational sequencing, safety and data logging are required.
  • Engine-building: Main bearing, connecting rod bearing, cylinder head
  • Power plants: e.g. Turbines, compressors
  • Ring gear bolt connections: e.g. wind power plants
  • Tower fittings: e.g. crane construction
  • General mechanical engineering

Quality Assurance

All MMDS are checked for 100 % process security. During order handling, they are accompanied by ongoing quality assurance measures and supplied with extensive documentation.




SCHAAF MMDS are user-friendly, reliable, and manufactured in accordance with the highest level of technical know-how. Our highly-motivated staff would be pleased to train your personnel, in situ or at our works, in the general handling and operation of the mobile and stationary control unit. In this way, all the process parameters can be entered optimally in order to achieve maximum process monitoring and safety. Of course, the MMDS are supplied ready for operation.


Fully assembled and ready for immediate use Hand lever pump up to 4,000 bar hydraulic pressure.

High-pressure generators optimally matched to our high-pressure tools.

Hydraulic high-pressure accessories specially adapted to the function.


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Industry-specific special solutions:

All SCHAAF products offer an individual solution for every industry.

MMDS proves particularly effective for:

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