Specific Features - Siemens 1FK7 Series Instructions Manual

Installation
The subframe for attaching the foot or flanged gearbox must be level and torsionally rigid
in order to prevent strain on the gearbox or output shaft bearing.
The tapped center hole of the output shaft (according to DIN332 sheet 2) is provided both
for shrinking on and for axially attaching transmission elements (gear wheel, chain wheel,
belt pulley, clutch hub) by a central screw.
Shaft ends up to a diameter of 55 have tolerance ISO k6, over 55 have ISO m6.
The key complies with DIN 6885 sheet 1.
4.2.2

Specific features

4.2.2.1 Geared motor with hollow shaft and key link
Shaft mounted gearboxes are inserted onto the drive shaft of the machine that is to be
driven. The reaction torque must be supported either by flange-mounting the gearbox or
by a torque bracket.
In the case of flange mounting, the deviation from perpendicularity between the flanged
end surface on the machine and the shaft axis must not exceed 0.03/100 mm because
of the danger of distorting the bearing or causing an impermissible bending load on the
machine shaft.
The hollow shaft borehole is designed to comply with tolerance ISO H7 and the keyway
with DIN 6885 sheet 1. The machine shaft must comply with ISO k6. The machine shaft
must have a tapped center hole complying with DIN 332 sheet 2.
The shrink on/forcing off disk fitted in the hollow shaft is provided for axially attaching the
gear by a central screw.
Assembly/shrinking of the gear onto the machine shaft:
- Paint the machine shaft with MoS2 paste.
- Paint the hollow shaft spiral groove and keyway with rust preventing grease.
- Shrink the gear on by means of the central screw. Do not hit with a hammer!
Never slip on a dry gear, as otherwise it will be impossible to pull it off to make a
repair because it will have rusted on.
Disassembly:
- Force the gear off by means of a forcing off disk and a suitable forcing-off screw.
Protect the centering of the machine shaft with a support.
- If the shaft is stuck, we recommend allowing rust dissolving oil to work into the
machined seat on the shaft ends for a lengthy period of time.
4.2.2.2 Geared motors with hollow shaft and shrink disk connection
The instructions listed above apply here (see Chapter 4.2.2.1 "Geared motor with hollow
shaft and key link")! These hints must be observed without fail!
In the case of gears supplied with a shrink disk, this is already mounted on the end of the
hollow shaft and is therefore ready for assembly (conical surfaces and screws of the
shrink disk have been greased in the works).
Do not on any account tighten the locking screws of the shrink disk before the
machine shaft has been mounted as otherwise the inner ring and the hollow shaft
hub will be plastically deformed.
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ENGLISH
CAUTION
CAUTION
610.40 064.01 Siemens AG