Mahr Federal has introduced a new MarCheck measuring and evaluation unit for its high precision Linear 100 universal length measuring instrument. MarCheck allows both measurements and calibrations to be performed quickly and reliably at the touch of a button. Results are clearly shown in large digits on the display screen and can be output via USB or RS 232 ports. With a direct measuring range of up to 50 mm (2 in.) and an application range of up to 100 mm (4 in.), the Mahr Federal Linear 100 provides rapid high-accuracy internal and external measurements directly on the shop floor.

"The MarCheck evaluation unit makes the Linear 100 even more versatile for precision measurement on the shop floor," said George Schuetz, Mahr Federal's director of precision gages. "In addition to performing sub‑micron measurements, the Linear 100 with MarCheck now helps precision machinists save time by performing calibration checks, such as setting direct-reading measuring equipment or 2-point bore gages."

Key to the development of MarCheck was intuitive operation. Easy-to-use menus guide operators, and measurements are performed systematically using function keys. The Linear 100 with MarCheck offers a more economical alternative to rings and gage blocks for shop floor mastering of inner and outer comparative measuring equipment, 2-point measuring instruments, inside calipers and dial comparator snap gages. MarCheck upgrade packages are also available for older length measuring machines.

Compact in design, the Linear 100 features an adjustable 76 x 76 mm (3 x 3 in.) measuring table for precise adjustment of part position when measuring ODs, and a 4 to 40 oz (1 to 11 N) adjustable measuring force that remains virtually constant over the entire measuring range. For ID measurement, the 100 mm (4 in.) x 185 mm (7.3 in.) worktable allows for precision part positioning for measurement. The integrated measuring system is based on the Abbe principle (i.e., the measuring arm and reference are in line) which eliminates cosine errors.

Internal/External measurements, as well as Combined Internal/External measurements, are possible without remastering, and easily interchangeable measuring anvils provide increased part measuring versatility. The solid cast body reduces stresses and twisting error, and a large digital display provides clear readouts with selectable ID/OD results and preset values. An RS-232 interface makes it easy to transfer output data to PCs, and optional software allows measured values to be transferred to Windows programs such as Microsoft Excel.