MITSUBISHI MATERIALS CORPORATION
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MWS...DB DRILL

OPERATIONAL GUIDANCE FOR THE MWS...DB DRILL
FLAT FACE DRILLING
Drilling a blind hole

1. Drilling a pilot hole
2. Initial cutting with the long type drill

3. Drill the deep hole
4. Drill retraction

IRREGULAR FACE DRILLING
Drilling and breaking through on irregular faces or angles

1. Spot facing
3. Initial cutting with the long type drill

5. Breaking through
2. Drilling a pilot hole

4. Drill the deep hole
6. Drill retraction