 Since
its founding in 1928, GAMFIOR a unit of SKF has
been engaged in high precision mechanics.
Solution for horizontal grinding
The offering for horizontal grinding includes two
HF spindle series, a new motorized spindle for external
grinding and high precision motorized working head.
GAMFIOR's unmatched, long-term experience with ceramic
bearings makes it possible to offer these spindles
a long-life grease lubrication option that eliminates
all the problems tied to management of a lubrication
control unit.
Customer benefits
 Unsurpassed
spindle versatility Wide power range. With the power
range available in SKF grinding spindles, you can
use the same spindle for several different operations,
saving time in machine set-up during changeovers.
High speed
The spindle ndm (speed per diameter) is very high,
which means that the ratio of the bearing diameter
versus the speed gives the system a very high stiffness
compared to other spindles.
Easy installation
SKF spindle systems can be easily used to upgrade
a machine with a traditional belt driven spindle or
simply to substitute another integrally motorized
spindle. In fact, the spindle is compatible with all
of the most popular lubrication units, and it does
not require any specialized treatment
for the motor coolant (temperature control or type
of media).
Thermal stability
For precision spindle applications, the system's
thermal stability is of top priority. In fact, the
elongation of the spindle nose resulting from thermal
growth is small enough not to compromise the quality
of an operation where the axial position of the wheel
must be within tolerance (e.g. groove of the bearings).
Low vibrations
All the rotating parts of the spindle are balanced
to G04 grade, and in order to assure that spindle
vibration is as low as possible, all components are
dynamically balanced and then verified after final
assembly.
High stiffness
SKF’s High Precision Bearing design configurations,
proven in hundreds of applications, provide for a
very stiff spindle both in static and in dynamic modes.
On each spindle model an accurate dynamic analysis
of the harmonic frequencies is done; each spindle's
natural vibration frequencies are designed to occur
far from the working speed range.
Easy substitution
Change-out with similar SKF models is extremely fast:
the converter drive "recognizes" the spindle
from a special code in the connector, and the operator
does not have to make any adjustment.
Long service life
The spindles are designed for a long service life:
the construction itself is robust, and because all
the parts are standardized, you can repair the spindle
repeatedly without affecting quality.
Spindle engineering information
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The
GHP model for internal applications ranges in size
from an 80 mm spindle diameter with 0,6 kW and a maximum
speed of 180 000 rpm to a 150 mm spindle diameter
with 40 kW and a maximum speed of 30 000 rpm. 
Although
the speed is low, to perform an outstanding external
grinding operation is quite difficult: every light
vibration is amplified by the wheel dimension and
becomes really evident on the machined piece. Only
the smart combination between robust bearing configuration
and particular motor with low losses on the rotor
and therefore less heat on it made possible the development
of motorized spindles that allows impressive improvement
in the machine’s capabilities and reductions
of masses and dimensions. 
The
standard spindle range for vertical grinding has been
developed to enable vertical applications.
The
long-term experience with versatile grinding spindles
having the motor in the back has allowed the design
of a new spindle range suitable for surface grinding
and deep bore grinding.
Gamfior
has also a long experience in hydrostatic and hydrodynamic
spindles.
