--- 34 ---
(4) Finally, check the perpendicularity of the
saw blade with relation to the upper surface
of the base [tolerance: 0.15/100 mm].
If it is not within tolerance, adjust 8-mm bolt
(A) (stopper for 0˚) as necessary. (Refer to
the Instruction Manual "Oblique angle".)
8-mm hexagon socket set screw
Fig. 52
Slide pipe (A)
Holder hole diameter
is 31 mm (1-7/32").
8-mm lock nut
Holder (A)
Slide pipe (A) outer
diameter is 30 mm (1-3/16").
9-3. Ball Bushing (Linear Bearing)
(1) Structure of the Ball Bushing
The ball bushing is commonly called a
linear ball bearing. Inside the bearing is
elongated guide grooves in which steel
balls circulate and roll when a load is
applied (as indicated by the arrow marks
in Fig. 53). This type of device is widely
used in automated machine tools. The
advantage of the ball bushing is that its
friction coefficient remains largely
unchanged even when the load is
increased, ensuring smooth sliding
movement. In addition, slide pipe (B),
Fig. 53
made of bearing steel and heat treated to a high degree of hardness (HRC 60 to 64), is highly resistant to
wear. Salespersons should have a good understanding of the structure and rugged characteristics of this
exceptional mechanism to enhance sales promotion.
(2) Lubrication
If it is necessary to replace the ball bushing, apply approximately 2 grams (0.1 oz) of grease (Nippeco SEP
3A) on the steel balls and within the guide grooves of the new ball bushing. If grease is not applied, it will
shorten the service life of the ball bushing, and subsequent abrasive contact between the steel balls and slide
pipe (B) will cause abnormal noise during slide cutting operations. Customers should be instructed to
thoroughly remove saw dust and other foreign matter from slide pipe (A) and slide pipe (B) and liberally coat
them with machine oil at least once a month.
No-load side
ball bushing
Load side
ball bushing
Slide pipe (B)
Ball bushing
Steel balls move by rolling.
Front
Rear
1
2
