MAHR - Шариковые направляющие Marmotion - 2010 Английский язык

                                            для размещения заказа - mahr@mahr-tools.ru

-        38 M a r M o t i o n . H i g h - p re c i s i o n ro t a r y s t ro k e b e a r i n g s

 Mahr

3. Notes on Design and Installation

3.3 Mounting the guide shaft

Unlike the guide bush, the guide shaft can be clamped or pressed in.
A radially loaded rotary stroke bearing is subject to elastic deformation on the rolling faces and the guide shaft. The rigidity of the guide
shaft is largely determined by the type of clamping used.
With a relatively high load, a long shaft and a need for very accurate guiding over the entire stroke path, at least one of the two holders
should be designed with a clamping length of
s  1.5 · dw
If there is a clamp on one side only (cantilever beam), the application point of the load should be placed as close as possible to the
clamped end.

Beam "on two supports" (loose bearing)
f(a) Deflection at force application point
g(a) Elastic curve

Clamped beam

Fig. 10

Pressing in
Make the location bore e.g. ISO-R6 with axis in true alignment. The parallelism deviation of two paired shafts should not exceed the
preloading value.

Clamping in the location bore, e.g. ISO-H6
• Indirectly with a slot and tension bolt.
• Directly with a pressure screw. The end of the shaft must be slightly flattened, tapped or turned in to secure it axially.

Clamping in vee-block
• With a clamp
• With a tension bolt

         Clamping in location bore          Clamping in vee-block

Fig. 11

Adhesive fittings
Poorly aligned location bores can result in tension in the shaft and rotary stroke bearing. This can be prevented by providing the
bores with some fitting clearance, e.g. ISO F7-H7. At the final assembly stage, glue the shafts together with the rotary stroke bearing
and allow to harden when properly aligned. The manufacturers' gluing instructions in terms of the gluing aperture, hardening time, etc.
must be adhered to.

                                                                                     mahr@mahr-tools.ru
                                                                                       www.mahr-tools.ru