HEIDENHAIN Length Gauges - Manual (Page 18)

18
Expendable parts
HEIDENHAIN length gauges contain
components that are subject to wear,
depending on the application and handling.
These include in particular the following
parts:
• Guideway (tested for at least 60 million
strokes*)
• Cable link for CT, MT 60 and MT 101
(tested for at least 1 million strokes*)
• Scraper rings
• Rubber bellows for AT and ST 1200
* With CT, MT 60 M and MT 101 M
only with actuation by switch box
Note
DIADUR is a registered trademark of
DR. JOHANNES HEIDENHAIN GmbH,
Traunreut, Germany.
Zerodur®is a registered trademark of
Schott Glaswerke in Mainz, Germany.
Plunger guideway
HEIDENHAIN length gauges are available
with various plunger guides.
The plungers of the HEIDENHAIN-ACANTO
length gauges work with sliding guides.
The sliding guides have the following
properties:
• Sturdiness thanks to few moving parts
• High tolerance to shock and vibration
• High plunger speeds and long service life
thanks to high-quality ceramic bearings
• Less sensitivity to improper clamping
The HEIDENHAIN-METRO, HEIDENHAIN-
CERTO, and HEIDENHAIN-SPECTO length
gauges are equipped with a ball-bush
guide . The following are some of the basic
properties of ball 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)
Sliding guide Ball-bush guide