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9.4 The table insert
The table insert on a bandsaw is a consumable item,
Fig. 9.9
and will
therefore need replacing periodically. This procedure should be carried out
with the bandsaw blade removed. To replace the table insert simply push
the old insert out from underneath the table and fit the new one into
position.
9.5 The bandwheel tyres
The bandwheels on this machine have rubber tyres fitted to the outer rim
of the wheel
Fig. 9.10
to protect the set of the blade when in use, also to
provide drive and to stop the blade slipping. As part of your regular service
schedule inspect the tyres for wear and damage and replace if necessary.
Again, this is a consumable part of the bandsaw and will need replacing
periodically, depending on usage.
First remove the blade from the bandsaw, then remove the bandwheel by
undoing the hex head bolt
Fig. 9.10
. Gently ease the existing tyre from
the rim, taking care not to damage the bandwheel. When fitting the new
tyre it is a good idea to heat the tyre first in hot water, this softens the
rubber up and makes it easier to stretch it over the bandwheel. The tyres
before stretching are much smaller than the bandwheel and a good deal
of stretching is required to make them fit. It is advisable to get help from
a second person who can insert the wheel into the tyre while it is fully
stretched. It is easier to replace the tyre with the wheels removed.
9.6 The bandwheel bearings
The bandwheel bearings are sealed for life units which will need replacing
periodically depending on usage.
To replace the bearings; first ensure that there is no blade fitted. Remove
the hex head bolt from the hub and remove the bandwheel, you will notice
that there are two separate bearings fitted in the hub pressed up against
each other. Take a brass drift (or similar) and tap one of the bearings out,
the second bearing should now be able to be pushed out.
When fitting the new bearings; position by hand in the wheel hub and tap
in until the bearing seats against the ridge in the casting,
Fig. 9.11
.
9.7 Cleaning the table
The table is ground from cast iron and if cared for properly will provide
smooth, accurate performance. When machining wood a certain amount of
resin will be deposited on the surface, to ensure optimum performance the
table needs to be properly cleaned at regular intervals.
Firstly brush off all loose particles, then wipe clean with white spirit ensuring
that any resin build up is removed. Once the table has been thoroughly
cleaned it can now be treated with CWA195 silicone spray or wax. If these
guidelines are followed the timber will glide smoothly across the table.
9.8 The bandwheel brush
The purpose of this brush is to remove any excess sawdust and resin
from the bandwheel and tyre,
Fig. 9.12
. This brush will need adjusting
periodically depending on usage. Before each use inspect the brush and
make sure it is making sufficient contact with the bandwheel to remove
sawdust from the tyre. The brush should be touching but not applying
pressure to the wheel. If it isn’t; loosen the fixing and adjust accordingly so
it makes contact with the wheel. When the brush cannot be adjusted any
nearer the wheel due to the bristles being worn then it must be replaced.
Periodically the brush may also become clogged up with resin (this is
especially common when cutting a long run of soft wood) if this occurs this
resin must be scraped off, as performance of the brush will be reduced.
Fig. 9.9
Table insert
Fig. 9.10
Bandwheel tyre
Fig. 9.11
Fig. 9.12
Bandwheel brush
9. Maintenance - Cont.
Hex head bolt
Summary of Contents for BS400 Premium
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