wto CoolSpeed mini User manual

CoolSpeed mini spindles are driven by through-coolant or oil.
They provide for very high rotation speeds while maintaining perfect run-out values.
CoolSpeed mini is designed to machine the workpiece top surface and perform milling, drilling, chamfering and
engraving. It requires no machine adaptations, it fits into standard –sealed –tool holders, and several CoolSpeed
mini units may be applied into the machine magazine during the machine set-up.
The CoolSpeed mini spindles provide for significant cost reductions, including:
–Longer tool life
–Shorter machining times
–Longer main spindle life
–Freeing machine to perform other tasks

•This chart illustrates the logarithmic nature of
the rotation speeds measured at different
pressure levels.
•The formula displayed within the chart can be
used to calculate the rotation speed at any
pressure level.
•The curve and equation relate to average
values. The actual results lie within a small
variance from the curve.
•The labeled “Water Pressure” may refer to any
liquids with similar viscosity as water (i.e. all
types of emulsion/cooling liquid).
•The rotation speed levels shown here are the
no-load speeds (i.e. no torque acting upon the
shaft).

•This chart illustrates maximum and
recommended output power levels
measured at different pressure levels.
•The formula displayed within the chart can be
used to calculate the output
power at any pressure level.
•The max output power curve is meant as a
reference only and should not be
used for an actual job. Working near this curve
will put the spindle at risk of
operating failure and damages may result.
•It is suggested to locate the job’s required
output power close to or below the
“Recommended Output Power” curve,
resulting in improved speed stability.

•This chart illustrates the relationship between
the torque and the actual rotation speed.
•The formula displayed within the chart can be
used to calculate the torque at any rotation
speed. Notice that by definition, maximum
torque occurs at zero rotation speed resulting
in no power. Likewise, at maximum rotation
speed there is no available torque, therefore
producing zero power.

•This chart illustrates the parabolic relationship
between output power and rotation speed at
different pressure levels. Notice that there is
no power available at zero and at maximum
rotation speeds.
•This chart illustrates that any external load will
cause a reduction in speed; the more power
demanded, the greater the speed reduction.
To the right of the peak lies the working area
of the spindle, the peak being its limit. The
spindle will stop rotating should the power
exceed “Max Power”.

Replacement Kit
The replacement kit includes 2 bearings and 1 turbine.
It is replaced with each new tool (drill or mill).
There are unique replacement kits for tool shanks:
•3 mm, 4 mm, 6 mm
•1/8” , 3/16”, 1/4”
* Tool is not included.

Assembly Device
The Assembly Devices are used to assemble the bearings and turbine
onto the tool shank.
Each diameter is unique and includes a precise ring inside.
There are separate assembly devices for tool shanks:
•3 mm, 4 mm, 6 mm
•1/8” , 3/16”, 1/4”
* Do not attempt to use alternative devices as you will damage the
bearings and the CoolSpeed mini will not perform.

Pressure Device and Gauge
•The pressure device is used to measure the through coolant pressure
at the main spindle end.
•This value is critical as it is used to calculate the CoolSpeed mini
rotation speeds.
•The device fits into standard –sealed –tool holders,
with ID 25 mm / 1 ”.
•The gauge is a standard pressure gauge; ¼ BSP thread,
60 bar, rear screw.

Pump requirements

Emulsion Types
Cutting fluid (Emulsion) is a type of coolant and lubricant designed specifically for metal working processes. There are
various kinds of cutting fluids. They may be made from petroleum distillates, plant oil, water and air, or other raw ingredients.
Most metalworking and machining processes can benefit from the use of cutting fluid, depending on work-piece material.
Common exceptions to this are cast iron and brass , which are machined dry.
There are generally three types of liquids:
•Mineral emulsion
•Semi-Synthetic emulsion
•Synthetic emulsion
Semi-synthetic and synthetic cutting fluids represent attempts to combine the best properties of oil with the best properties
of water by suspending emulsified oil in a water base. These properties include: rust inhibition, tolerance of a wide range of
water hardness ,ability to work with many metals, resist thermal breakdown, and environmental safety. Water is a good
conductor of heat but has drawbacks as a cutting fluid. It boils easily, promotes rusting of machine parts, and does not
lubricate well. Therefore, other ingredients are necessary to create an optimal cutting fluid.
The CoolSpeed mini may use each type of emulsion to drive the turbine.
For calculating turbine rotation speed, we assume 95% water (viscosity and density).

CoolSpeed mini Air spindles are driven by mist lubricated air.
They provide for very high rotation speeds while maintaining perfect run-out values.
CoolSpeed mini Air is designed to machine the workpiece top surface and perform milling, drilling, chamfering and engraving.
For those machines equipped with through main spindle mist, CoolSpeed mini Air requires no machine adaptations, it fits into
standard –sealed –tool holders, and several CoolSpeed mini Air units may be applied into the machine magazine during the
machine set-up.
For all other machines, an air hose may be adopted externally via a dedicated tool holder.
The CoolSpeed mini Air spindles provide for significant cost reductions, including:
•Longer tool life
•Shorter machining times
•Longer main spindle life
•Freeing machine to perform other tasks

•This chart illustrates the logarithmic nature of
the rotation speeds measured at different
pressure levels.
•The formula displayed within the chart can be
used to calculate the rotation speed at any
pressure level.
•The curve is relates to average values. The
actual results lie within a small variance from
the curve.
•The rotation speed levels shown here are the
no-load speeds (i.e. no torque acting upon the
shaft).

•This chart illustrates the relationship between
the torque and the actual rotation speed.
•Notice that by definition, maximum torque
occurs at zero rotation speed resulting in no
power. Likewise, at maximum rotation speed
there is no available torque, therefore
producing zero power.

•This chart illustrates the parabolic relationship
between output power and rotation speed at
different pressure levels. Notice that there is
no power available at zero and at maximum
rotation speeds.
•This chart illustrates that any external load will
cause a reduction in speed; the more power
demanded, the greater the speed reduction.
To the right of the peak lies the working area
of the spindle, the peak being its limit. The
CoolSpeed mini Air will stop rotating should
the power exceed “Max Power”.

Air Filter –Regulator –Lubricator Unit
The CoolSpeed mini Air models are driven by air mist.
For those machines that do not supply mist through the main
spindle, an external ‘air filter – regulator –lubricator’ unit is
required.
You may find affordable units at your local supplier.
You should connect the unit nearby the machine, and use
suitable 6 mm or 8 mm rubber hoses with pneumatic fittings.

Air Lubrication Oil
Oil Lubrication will affect the following:
•Bearing noise level
•rotation speed
•bearings life
•output power and torque
•Temperature elevation in bearings
For CoolSpeed mini applications, where high rotation speeds and relative low torques are involved,
oil mist is the preferred option.
Oil is the basic lubricant for the CoolSpeed mini ball bearings.
The most suitable oils are the synthetic oils, as:
•Silicone polymers (Silicone products are useful over a much wider temperature range but do not
have great load carrying ability. It has become customary in the miniature bearing industry.)
•Oil including fluorinated additive
•Esters (The esters are the most widely used synthetic lubricants. They do not have the film strength capacity
of a petroleum product, but do have a wide temperature range and are oxidation resistant.)
The best choice for CoolSpeed mini Air lubrication oil is the low viscosity (VG 10 to VG22) Synthetic oils.

Replacement Kit
The replacement kit includes 2 bearings and 1 turbine.
It is replaced with each new tool (drill or mill).
There are unique replacement kits for tool shanks:
•3 mm, 4 mm, 6 mm
•1/8” , 3/16”, 1/4”
* Tool is not included.