Scratch Hardness Tester, Model 239 II
26
BAE 239 II
8
Universal Adapter Set (Accessories)
The adapter set consists of the following components:
8.1 Universal
shaft
Universal shaft: Round rod (5 mm diameter) made of
stainless steel, with an axial bore with internal thread
(M2.5) at one end and a clamping area over the total
length. The universal shaft is mounted on the load
arm vertically, the bore with the internal thread
pointing downwards. There the adapter described
hereafter can be fixed. However, the universal shaft
can also be used without any additional adapter by
screwing so-called gauge slides that are usually
provided with a external thread M2.5, into the shaft.
Gauge slides are available with a tip or a spherical
touch area in a diameter range of 1 - 30 mm. They
are made of different materials (hardened steel,
tungsten carbide, sapphire, ruby). Therefore it may
be recommendable to use these commercial,
inexpensive inserts for purposes others than
originally intended. To secure the gauge slides on
the shaft a serrated lock washer should be used.
8.2 Clamping
adapter
Clamping adapter: Cylindrical part made of
stainless steel, with one axial bore each of 4 mm
and 5 mm diameter as well as radial threaded bores
with clamping screws. The clamping adapter is
intended for tool inserts using a cylindrical shaft (4
mm dia.).
The following tools from the ERICHSEN line can be
used:
spherical inserts, shaft without clamping device
•
test tip in accordance with van Laar (0.5 mm
dia.)
•
test tip in accordance with Bosch (0.75 mm dia.)
•
test tip in accordance to (EN) ISO 1518, DEF
1053 and GME 60280 (1 mm dia.)
•
test tip (ball, 3 mm dia.)
asymmetric inserts, shaft with clamping device
•
test tip in accordance with Clemen
•
test tip for cross hatch cut tests
The clamping adapter can be mounted -
comparatively to the moving direction of the basic
instrument - in two orientations turned by 180°.