The Heidenhain Specto Length Gages are the most popular gaging probes that Heidenhain offers. These Length Gages come in 12MM or 30MM strokes and the output is either 11uApp, TTL or 1Vpp
The Specto Length gages design is with a ball-bush guide. The following are some of the basic properties of ball-bush guides in HEIDENHAIN length gauges: Low friction, which makes versions of length gauges with reduced gauging force possible. Safe plunger extension and retraction even with high radial force. High precision of the measuring loop thanks to a guide that is free of play (the bearing and plunger are specially fitted during manufacture)
The plungers use rubber bellows on the Heidenhain Specto length gages to protect them from contaminates. The bellows give a high resistance to chemical and thermal influences and have a relatively low stiffness. Its influence on the gauge’s mechanical behavior and the measuring force is therefore low.
The Heidenhain Specto length gages have an accuracy of 1um.