Scratch Hardness Tester, Model 239 II
27
BAE 239 II
8.3 Disc
adapter
Disc adapter: Cylindrical part made of stainless steel
with axial bore (5 mm dia.) and radial threaded
bores with clamping screws at one end; at the other
end plane milling parallel to the axis with three radial
threaded bores (M3). The disc adapter serves for
fixing of plane tool inserts, especially such with
circular disc geometry. The inserts must be provided
with at least one bore for a screw M3. The min./max.
admitted disc diameter is 8/25 mm.
From the ERICHSEN programme the "Oesterle
disc" (disc dia. 16 mm, thickness 1 mm, radius 0.5
mm, centre bore 3 mm dia.). The following versions
of the Oesterle insert are available:
- test disc made of Duroplast
- test disc made of copper
- test disc made of stainless steel
The disc adapter can be mounted - comparatively to
the moving direction of the basic instrument - in four
orientations turned by 90°.
8.4 Chucking
adapter
Chucking adapter: Clamping huck made of gunmetal
finish steel with three-piece collet chuck set for 1 /
2.35 / 3 mm dia. The chucking adapter serves as a
support for a cylindrical tool insert with spherical or
pointed tip (pins, needles etc.).