Fig 22; General Note - Jet BD-920W Operating Instructions Manual

Fig 20
The follow rest
is mounted on the saddle and
follows the movement of the tool. It
prevents flexing of long and thin
work pieces under pressure from the
tool (Fig 21).
Fig 21
Set the fingers snug but not overly
tight. Lubricate the fingers to prevent
premature wear.
8. Maintenance and inspection
General notes:
Maintenance, cleaning and repair
work may only be carried out after
the machine is protected against
accidental starting by pulling the
mains plug.
Clean the machine regularly.
Defective safety devices must be
replaced immediately.
Repair and maintenance work on the
electrical system may only be
carried out by a qualified electrician.
8.1 Lubrication schedule
Refer to Fig 22 and Fig 23.
Weekly apply oil to:
1...oil ball on gear hub
3...teeth of reversing gear lightly
4...bed ways lightly
6...lead screw on entire length
7...oil ball on lead screw bracket
8...screw and guides of top slide
9...oil ball on tailstock body
10..oil ball on top of carriage
12..hub of feed lever
13..oil balls on apron front
Weekly apply grease to:
2...teeth of change gears
5...rack over entire length
11..tailstock quill over entire length

Fig 22

Fig 23
8.2 Bearing adjustment
The main spindle taper roller
bearings are adjusted at the factory.
If end play becomes evident after
considerable use the bearings may
be adjusted.
Loosen set screw (1, Fig 24) in the
slotted nut (2) on the back of the
spindle.
9
Fig 24
Tighten nut carefully, the spindle
should still revolve freely. Excessive
preloading will damage the bearings.
Tighten set screw.
8.3 Cross and top slide
adjustment
Each slide is fitted with a gib strip
and can be adjusted with screws (1,
Fig 25) fitted with lock nuts (2).
Fig 25
Adjust until slides moves freely
without play.
8.4 Cross slide spindle
adjustment
Remove the top slide and adjust the
grub screw (1, Fig 26) until the
backlash between the spindle and
the nut is eliminated.
Fig 26