MarSurf SD 140 Stations Measure Roughness and Contour in One Pass

Mahr's MarSurf SD 140 series uses a tool-free, magnetic probe arm change with chip recognition and automatic force selection.
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Sept. 24, 2026
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MarSurf SD 140 Stations Measure Roughness and Contour in One Pass

Checking a part's roughness and contour typically takes separate measuring runs, adding time to each inspection. The MarSurf SD 140 series of stationary surface measuring stations acquires roughness and contour data in a single measuring stroke using the stylus method, and the software then evaluates each set of values separately.

The series includes:

  • The manual AG 11, an entry-level station for stationary surface metrology.
  • The BG 12, which adds high axis speeds, automated measuring sequences, and a choice of manual or motorized TY table axis.

Displayed at IMTS 2026

The MarSurf SD 140 BG 12 configuration was on display at IMTS 2026 in Chicago.

See more from IMTS 2026 →

Both stations use a tactile probe system that records roughness and contour values at the same time, with measuring force adjustable via software from 4 to 30 mN on the AG 11 and 0.7 to 30 mN on the BG 12.

Probe arms change tool-free through a magnetic interface with chip-based electronic probe arm recognition and automatic probe force selection. Users can switch measuring tasks without recalibrating the probe arm, and the correct contact force is applied when changing between probe tips.

A range of probe arms is available:

  • The 4 in (100 mm) probe arm covers a 0.4 in (10 mm) measuring range.
  • The 8 in (200 mm) probe arm covers 1 in (25 mm) measuring range.

Both stations have a 5.5 in (140 mm) X-axis and a clamping system that positions workpieces quickly and correctly and shortens setup and changeover.

The AG 11: 

  • A resolution of 0.4 µin (10 nm)
  • Measuring speeds of 0.004 to 0.4 in/s (0.1 to 10 mm/s)
  • X-axis positioning speeds of 0.004 to 8 in/s (0.1 to 200 mm/s)
  • Z-axis feed unit adjusts manually, with quick adjustment and fine adjustment for alignment
  • Clamping system has a 15 x 18 in (390 x 450 mm) mounting plate with a 2 in (50 mm) hole pattern that accepts a variety of workpiece holders and clamping devices
  • Offers a defined start position with an aligned axis
  • Software measures double contours, such as for determining diameters; evaluates R, W, and P roughness parameters according to the current standard; and handles contour measurement and evaluation
  • Start Quick & Easy programs by reading DMC codes
  • Handles workpieces up to 77 lb (35 kg)
  • Measures 22.5 x 36 x 32 in (572 x 905 x 822 mm)
  • Weighs 220 lb (100 kg)

The BG 12 has:

  • X-axis traversing length of 0.004 to 5.5 in (0.1 to 140 mm)
  • A 14 in (350 mm) Z-axis
  • Measuring speeds of 0.0008 to 0.4 in/s (0.02 to 10 mm/s)
  • A support plate for workpieces up to 198 lb (90 kg).
  • CNC axes and MarWin measurement and evaluation software automates the entire measurement process
  • Fast axes and probe system make measurement up to 65% faster, based on measuring a journal.

Applications

  • Simultaneous roughness & contour measurement
  • Double contour measurement for diameters
  • R, W, and P roughness parameter evaluation
  • Journal measurement
  • Large workpiece measurement
  • Automated surface measuring sequences

Industries

  • Quality Assurance
  • Metrology
  • Mechanical Engineering
  • Medical
  • Automotive

Who It's For

  • Roughness & contour in one measuring run
  • Entry-level stationary surface metrology
  • Frequent changes between measuring tasks
  • Prevention of incorrect measurements after probe changes
  • Workpieces up to 198 lb (90 kg)
  • Fully automated measuring process

Features:

  • Simultaneous roughness and contour acquisition in one measuring stroke
  • Separate software evaluation of roughness and contour data
  • Tactile stylus probe system
  • Tool-free probe arm change via magnetic interface
  • Chip-based electronic probe arm recognition
  • Automatic probe force selection
  • No probe arm recalibration when changing tasks
  • 0.4 in (10 mm) measuring range with 4 in (100 mm) probe arm
  • 1 in (25 mm) measuring range with 8 in (200 mm) probe arm
  • 5.5 in (140 mm) X-axis
  • Clamping system for fast setup and changeover
  • AG 11: manual operation
  • AG 11: 0.4 µin (10 nm) resolution
  • AG 11: measuring force of 4 to 30 mN, software adjustable
  • AG 11: measuring speed of 0.004 to 0.4 in/s (0.1 to 10 mm/s)
  • AG 11: X-axis positioning speed of 0.004 to 8 in/s (0.1 to 200 mm/s)
  • AG 11: 15 x 18 in (390 x 450 mm) mounting plate with 2 in (50 mm) hole pattern
  • AG 11: defined start position with aligned axis
  • AG 11: manual Z-axis feed unit with quick and fine adjustment
  • AG 11: double contour measurement, such as for diameters
  • AG 11: R, W, and P roughness parameter evaluation according to current standard
  • AG 11: contour measurement and evaluation
  • AG 11: Quick & Easy programs started by reading DMC codes
  • AG 11: max workpiece weight of 77 lb (35 kg)
  • AG 11: 22.5 x 36 x 32 in (572 x 905 x 822 mm)
  • AG 11: 220 lb (100 kg) machine weight
  • BG 12: manual or motorized TY table axis
  • BG 12: measuring force of 0.7 to 30 mN, software adjustable
  • BG 12: X-axis traversing length of 0.004 to 5.5 in (0.1 to 140 mm)
  • BG 12: 14 in (350 mm) Z-axis
  • BG 12: measuring speed of 0.0008 to 0.4 in/s (0.02 to 10 mm/s)
  • BG 12: maximum workpiece weight of 198 lb (90 kg)
  • BG 12: CNC axes and automated measuring sequences with MarWin software
  • BG 12: up to 65% faster measurement, based on journal measurement

Mahr, Inc.
Providence, RI
(401) 784-3100
[email protected]
mahr.com

Contributors:
This piece was created with the help of generative AI tools and edited by our content team for clarity and accuracy.