 |
When
using high-speed machining centers (8,000-10,000 RPM
and higher), it is generally recommended to balance
the tool and toolholder as an assembly. Despite the
relatively small mass of this assembly compared to the
spindle, at these higher speeds small amounts of unbalance
create large amounts of centrifugal force. It's this
force which creates vibration which in turn can damage
the spindle and/or bearings and create other undesirable
effects such as chatter, poor surface finish, high tool
wear etc. |
Why
Balance Toolholders?
Vibration
in a spindle can have devastating results on the performance
and life of a machine tool. For this reason, all manufacturers
of machining centers, milling machines, grinders and the
like, take great care in accurately balancing their spindles.
However, at high speeds (typically above 10,000 RPM),
unbalance in the tool and toolholder can cause significant
damage to the spindle bearings and to the spindles itself.
|
A
Balanced Toolholder provides:
| • |
Better
surface finish |
| • |
Tighter
tolerances |
| • |
Increased
tool life |
| • |
Longer
spindle and bearing life. |
Resulting
in:
| • |
Higher
machine performance |
| • |
Lower
tooling cost |
| • |
Greater
profits |
|
|
|
CEMB
VTB 15
Technical Specifications
|
| Maximum
weight capacity: |
44
lbs |
| Minimum
weight capacity: |
8
oz. |
| Maximum
rotor diameter: |
9.4
inches (240mm) |
| Maximum
height above spindle: |
13.7
inches (350mm) |
| Balancing
speed: |
650
RPM |
| Maximum
sensitivity:- |
1
plane |
.0005
oz-in. (.5 g.mm) |
| 2
plane |
.001
oz-in. (1g.mm) |
| Motor: |
.12
hp |
| Power: |
110VAC
/ single phase / 60Hz |
|
|
Simplified
Controls
The VTB offers easy to use controls along with a laser
beam indication of actual unbalance position.
Electronic
Features:
| • |
Automatic
Measuring Cycle |
| • |
Electrically
interlocked rotor enclosure |
| • |
Storage
of 100 Rotor Files |
| • |
Eccentricity
Compensation |
| • |
Unbalance
Correction Using Fixed or Variable Components |
|
|
CRT
Readout (optional)
|
Accessories
Available
|
| Printer |
Adapter
for HSK 50 A and C |
| 50
taper to 40 taper adapter |
Adapter
for HSK 63 A and C |
| 50
to 30 taper adapter |
Adapter
for HSK 80 A and C |
| 50
taper to 45 adapter |
Adapter
for other HSK or tape sizes |
|
