NO 28 941
Three-jaw steel drill chuck
For use with MICROMOT rotary tools Precision drill grinder FBS 12/EF, Precision drill/grinder FBS 240/E, MICROMOT 60/EF and Flexishaft 110/BF. Advantageous when working with different shafts. Capacity 0.3 - 3.2mm.
Drill chuck or collet?
Drill chucks provide more convenience to
quickly change the tools when working
with shafts of varying diameters (e.g. HSS
drills as per DIN 338). However, because
of their technical setup, they have a few
drawbacks compared to collets: Less
clamping force and higher concentricity
tolerances. If high precision is necessary,
then working with MICROMOT steel
collets is a must. See also note at left.
NO 28 940
MICROMOT steel collet set
Triple slit and hardened. 1 each of 1.0 - 1.5 - 2.0 - 2.4, - 3.0 and 3.2mm. With clamping nut and holder for storage.
Note:
MICROMOT steel collets are hardened and thus have a high, consistent
flexibility. 
They also maintain prolonged accuracy, even after
regular use (these collets should not be compared with unhardened,
four-slit collets of brass and aluminium). The triple slit collet is substantially
more difficult to manufacture than the four-slit type, 
but offers a better load- bearing surface.
This is especially important for
cutters with small shaft diameters.
