______ HSD __________________________________________________________________________________
2 GENERAL INFORMATION
2.1 PROPER USE OF THE ELECTRO-SPINDLE
The electro-spindle is designed to operate as part of a machine.
The frame of the machine to which it is fitted must be sufficiently rigid to provide adequate support for the weight of the
electro-spindle, and to withstand the stresses caused by machining.
The electro-spindles described in this manual are designed for the low-medium power milling and drilling of wood, fibre-
board, plastic, aluminium, etc.. They are also designed only for operation at S1 duty cycle unless special applications
permit otherwise. (See data sheet.) Electro-spindle technical specifications vary from one model to another. (See data
sheet.)
This manual covers two series of electro-spindle:
1. The AT SERIES: These electro-spindles are normally fitted with single radial bearing tool supports and are
designed for low speed operation (normally up to 12000 RPM).
2. The MT SERIES: These electro-spindles are normally fitted with a single radial bearing* rear tool support, and a
front tool support consisting of a pair of conical bearings, and are designed for high speed operation.
* For special applications, or if requested by the customer, the single bearing rear support can be replaced with a pair of
conical bearings.
2.2 THE MAIN PARTS OF THE ELECTRO-SPINDLE
9
7
2
8
5
4
6
1
3
1 Spindle shaft
2 Spindle nose
3 Body
4 Control panel connector
5 Floating control connector
Figure 2.1 Overall views of the electro-spindle
6 Cooling fan cover
7 Shaft locking pin
8 Terminal block with strip
9 Cable guide
2.3 COOLING
In general, the electro-spindle is force air cooled by a fan under the rear cover. This fan is directly keyed on to the spindle
shaft. Cooling efficiency therefore depends on spindle rotation speed. Cooling is effective in both directions of rotation.
(See data sheet.)
i
THE COOLING FANS ARE DESIGNED BY HSD S.P.A. AND PROVIDE MORE EFFECTIVE COOLING THAN TRADITIONAL
AXIAL FANS.
CONTACT THE HSD TECHNICAL OFFICE BEFORE USING THE ELECTRO-SPINDLE AT SPEEDS SIGNIFICANTLY LOWER
THAN THOSE SPECIFIED ON THE ELECTRO-SPINDLE DATA PLATE. (SEE DATA SHEET.)
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