The Electrospindle C4147 is one size larger and more powerful than the Electrospindle C3140. These motors are widely used on professional portal milling machines and are very suitable for both milling and drilling due to the ceramic double angular contact bearings in the spindle nose. By means of a variable frequency drive (VFD) the speed can be regulated between 6000 and 24000 revolutions per minute.

This motor differs from the other Electrospindles C4147 motors by its type of cooling. Normal Electrospindles have fan blades at the end of the main shaft that provides cooling but also produces a lot of noise. Electrospindles with electric fan cooling have the advantanges that they make less noise at high speeds and provide sufficient cooling at low speeds where the normal shaft driven fan doesn't provide enough flow. The disadvantage is that the fan is not designed for the rapid radial movements of a CNC portal milling machine, which limits the lifespan of the fan. That is why these motors have a PTC130 for thermal protection and the fan is easy to replace.

• Teknomotor part number: COM41470533
• Designed for radial and axial loads
• Motor type: Manual Toolchanger
• Power rating: 2.2kW
• Speed range: 6000 - 24000 rpm
• Bearings: DB- Double angular contact Bearing in spindle nose
• Toolholder: Collets, ER25 collet size
• Frame: Extruded aluminium bar
• Stator: Three phase induction motor, insulation class F
• Rotor: Squirrel cage balanced according to ISO 1940, G2.5@24000rpm
• Type of Cooling: Electric fan cooling (24VDC)
• Protection: IP 50
• Includes a balanced nut and spanners