(3) Reassembly of the ball bushing

The Ball Bushing [114] and Holder (A) [124] are maintained at a smooth fit. When placing the Ball Bushing [114] into Holder (A) [124], gently hammer it with a plastic hammer so that the Ball Bushing [114] is seated into Holder (A) [124] in parallel. After reassembly, lubricate around the steel balls inside the Ball Bushing [114] with 2 grams of Nippeco SEP 3A grease. Apply machine oil to slide pipe (A) and slide pipe (B) of Hinge (A) Ass’y [87]. When reassembling, put the Ball Bushing [114] inside Holder (A) [124] as indicated in (A) of Fig. 55. Visual observation will do for this insertion. Layout in (A) offers about 30% higher rated load in (B).

Fig.55

6. Lubrication

Advise the customer to lubricate the machine as indicated below at least once a month. Also, prior to applying lubricant, any sawdust, dirt or other foreign matter should be thoroughly wiped away with a soft cloth.

(1)Swiveling section of the gear case

Coat machine oil on the swiveling and sliding portions of the Gear Case [198] and Hinge (A) Ass’y [87].

(2)Vise section

Coat machine oil on the screw thread portion of the Knob Bolt M10 x 66 [35] of the Vise Ass’y [42].

(3)Holder (A)

Coat machine oil on the swiveling and sliding portions of Holder (A) [124] and the Hinge Shaft (A) [9].

7. Product precision

On completion of reassembly, confirm precision tolerances.

Item

Tolerance

Deflection of dummy disc

0.15/φ200

Squareness between base and fence (A) and fence (B)

0.1/65 (Height of fence (A))

0.1/49 (Height of fence (B))

 

Flatness of fence (A) and fence (B)

0.15

Squareness between dummy disc and fence (A) and fence (B)

0.15/100

Squareness between fence (A) and fence (B) and slide pipes

 

(Place a square against fences (see Fig. 56), slide the head and

0.15/180

check for any clearance between the dummy disc and the square.)

 

Squareness between dummy disc and turn table

0.15/100

Surface alignment of base and turn table

 

(Use the upper surface of the base as a reference.)

(+) 0.1

 

 

(-) 0.2

Fig. 56

 

 

 

-39-

Page 42
Image 42
Hitachi C 8FSE, C 8FSHE specifications Lubrication, Product precision