Nitto Kohki HB-15B, Instruction Manual

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5
Chamfering levels Work criteria
7C 7C 1 time
10C 7C
→
10C 2 times in total
15C 7C → 10C → 12C → 15C
4 times in total
Table.1
The Scale Plate is for reference only. If accurate
chamfering is required, set the tool at a chamfering
level about 0.5 smaller than the desired one.
Try a test cut. Then adjust the tool for accurate
chamfering.
3-2. How to Adjust Chamfering Angle
(1) Loosen Hex. Socket Head Bolt 6 x 25 on Plate
Guide located on both sides of the body. (Fig.2)
0 10
20
Hex.Socket Head
Bolt 6
× 25
Plate A
Plate C
Plate Guide
Scale
Guide Pin
Fig. 2
(2) Hold the Plates and set the Scale of the Plate
Guide at the desired angle (pointed at by the
Guide Pin)
(3) Fix the Plate Guide in position by tightening the
Hex. Socket Head Bolt 6 x 25.
The tool has the limit of chamfering width which
depends on a chamfering angle. (Fig.3, Table.2)
α
A
C
B
R
Fig. 3
Chamfering Angle
α
A B C
45° 15 15 21
30° 9 15.5 18
15° 4 15.4 16
Table.2
3-3. Use of Spacers A and B
When Spacers A and B included in the accessories
are mounted as shown in Fig.4, chamfering 7C or
less can be performed using six “Indexable Insert
12.7”.
* If the setting is made in this manner, it is not
possible to perform chamfering of more than 7C.
Fig. 4
Motor
Spacer B
Key
Spacer A
Adapter
Holder B
Nut for Roller
Bearing AN03
3-4. Chamfering procedure for a column
Replace Plate C attached to the body with Plate B
(included in the accessories).
Mount the Roller Bracket to the Plate B using a Hex.
Socket Head Bolt 8 x 30 as shown in Fig.5 and then
adjust dimension A (Fig.6).
Chamfering of rounded portions can be performed to
accurate finish.
Fig. 5
Plate A
Dimension A
Adjust
Roller Bracket Hex.Socket Head Bolt 8 × 30
Plate B
Dimension A
Column
R
Fig. 6