Partner K950 RING, Руководство по ремонту

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7
ENGAGEMENT AND SUPPORT ROLLERS 6
The drive disc and the engagement
and support rollers are subjected to
considerable wear owing to the slurry
in which they have to operate. These
wear-prone parts are therefore
designed for easy replacement. The
service life of a set of engagement
and support rollers may vary consider-
ably depending on the material
being cut and the cutting technique
used. If insufficient water is used
during cutting, the rate of wear
increases. A set of rollers usually lasts
for about 2 to 6 blades.
The same disc/roller type is repla-
ced in pairs
In order for the blade to sit straight
in the drive disc, the same roller type
must always be replaced in pairs.
Upper and lower rollers can
switch places
It is normal for the upper engage-
ment roller’s flange to wear more
quickly owing to the feed pressure’s
extra load on this disc. It is OK to
switch the positions of the upper and
lower discs to exploit the entire ser-
vice lifetime of both discs before
replacement.
Wear limit
Engagement rollers
The engagement rollers must have a
flange width of at least .06 in./1.5 mm.
Support rollers
The support rollers must be replaced
when the rollers no longer have a
waist.
Min. 1.5 mm
0.06 in.
Older model
The older model is recognisable by its
stop screws (A). The stop screws limit
the movement of the knob at its
extended position and must be re-
moved in order to extract the knob
and press out the bearing housing.
New model
In the new version, the spring and
stroke limiter are enclosed in the
bearing housing. The knob has a
distinct stop position when it is un-
screwed for adjustment of the rollers.
The new model has a grease nipple
(B) and lubrication ducts in the bea-
ring housing. An outlet duct (C)
shows when the correct amount of
grease has been filled.
Knob with snap-in fastener
The new knob has a snap-in fastener
that engages with the bearing hous-
ing’s pin. By unscrewing the knob,
the snap-in fastener disengages from
the pin and the bearing housing can
be pulled out.
Engagement rollers – model variants
A
A
B
C
0.44 in.
11 mm
Conversion
The older model can be converted to
conform to the newer standard. The
following parts have to be replaced:
bearing sleeves, bearing housing and
knob.
A grease nipple has to be added.
Drill a hole as in the illustration, dia-
meter 5.0 mm and thread M6. Fit the
grease nipple. The hole for the stop
screw is left open.
2
Replaceable consumables