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 ST 1207 or ST 3007 provide an 11uApp output, extended by air and available in a right or straight cable exit.
The ST 1208 or ST 3008 provide 11uApp output, extended by spring push and available in a right or straight cable exit.
The ST 1277 or ST 3077 provide TTL output, extended by air and available in a right or straight cable exit.
The ST 1278 or ST 3078 provide TTL output, extended by spring push and available in a right or straight cable exit.
The ST 1287 or ST 3087 provide 1Vpp output, extended by air and available in a right or straight cable exit.
The ST 1288 or ST 3088 provide 1Vpp output, extended by spring push and available in a right or straight cable exit.
The Heidenhain Specto length gages have an accuracy of 1um.
