Starrett 2900 Series, User Manual

Page: 27 / 176

PKG08803-UM2900 27
ENGLISH
ACCESSORIES
The 2900 comes standard with a Lug-On-Center back.
The back is easily removed by unscrewing the four
back screws as shown in Fig. 20.
Do not touch any of the inner workings of the indicator,
and protect them from liquids, dust, and any other
foreign matter. Replace the back-lug as soon as possible.
Some examples of the different backs are listed below.
The Contact Point is another one of the parts on
your indicator that is interchangeable. Caution: When
removing the contact from an electronic indicator, two
pairs of pliers need to be used, one having soft jaws
so as not to damage the spindle and the second to
loosen the contact. Caution must be made not to twist
the tools spindle during this operation. The contact
point can be removed by carefully holding the spindle
firmly with the soft jawed
pliers and then unscrewing
it counter-clockwise with
your other pliers. Replace
the contact point the same
way, turning the tip on
clockwise. Excessive radial
rotation of the spindle shaft
may cause your indicator to
stop functioning properly.
Special contact points are
listed on the next page.
These backs, contact points
and all of the available
indicator accessories can
be found in your Starrett
catalog or online at www.
starrett.com .
Contact Point
Spindle Bellows
Spindle
Back - Lug
Back Screws x4
Stem Cap
Fig. 21