SIEMENS
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Siemens NC 62 · 2016
Main spindle motors
Asynchronous and synchronous motors for SINAMICS S120
2SP1 motor spindles
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Overview
The 2SP1 motor spindle product range comprises compact
standard motor spindles for milling machines that can be used
as an alternative to belt-driven spindles for rough cutting and
precise fine machining applications.
The 2SP1 motor spindle contains all the classical elements of
a motor spindle, such as a tool interface, tool clamping and
release mechanism, spindle bearings suitable for absorbing the
machining forces, water-cooled drive motor, spindle casing for
fixing and sensors for indexing and monitoring tool changeover.
The motor spindles are available in 2 diameters of 200 mm
(7.87 in) (2SP120) and 250 mm (9.84 in) (2SP125) and are
offered with a range of different torques and speeds to match
the respective milling machine family. The motor spindles are
ideally matched to the performance levels of SINAMICS S120.
The complete product range of 2SP1 motor spindles was
developed in cooperation with and is manufactured at Weiss
Spindeltechnologie GmbH.
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Benefits
The 2SP1 motor spindles offer the following important user
benefits over conventional belt-driven solutions:
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Compact spindle solution and everything integrated in the
spindle box
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Fewer components and easy installation
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Economical standard solution as compared with today's
belt-driven solutions
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Drive train with high degree of rigidity
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High torque and speed and therefore high productivity thanks
to high cutting efficiency and reduction of non-productive time
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Higher speed and shorter start-up times as compared with
conventional belt-driven or gear solutions
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Economical pneumatic tool release mechanism or optional
fast hydraulic tool release mechanism
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Worldwide system delivery including spindle mechanics from
a single source – from Siemens
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Extremely short tool change times with 2SP210 thanks to
2-channel technology and clamping set with optional latching
capability
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Application
The main application area for 2SP1 motor spindles are main
spindles for milling machines and machining centers in the job
shop area of the machine tools sector.
The 2SP120 motor spindles are particularly suitable for the area
of light metal machining at low torque and high speeds.
The 2SP125 motor spindles are characterized by a high torque.
The main area of application is in the machining of steel and
castings.
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Design
A key feature of 2SP1 motor spindles is their rugged design.
Depending on the version, the following options are available for
2SP1 motor spindles:
• Various tool interfaces
• Internal tool cooling
• External tool cooling
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Integration
2SP1 motor spindles are generally compatible with:
• SINAMICS S120
• SINUMERIK 840D sl
For the synchronous version of 2SP1 motor spindles, a VPM
Voltage Protection Module or the Internal Voltage Protection IVP
must be used as an integrated SINAMICS function, see Voltage
Protection Module VPM.
© Siemens AG 2016