MODEL MB-45
MODEL MB-45
Operator’s manual for Drilling Machine
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1. Relationship between machine speed and cutter diameter
– parameters
Relationship between machine speed and cutter diameter
The cutter diameter
Rotary speed
[rpm]
[inch]
[mm]
0,47÷1,4
12÷35
330
1,41÷1,97
36÷50
100
Relationship between machine speed and twist drill diameter
The twist drill diameter
Rotary speed
[rpm]
[inch]
[mm]
0,12÷0,51
3,5÷13
330
0,55÷0,87
14÷22
100
2. Guidelines for grading diameters of twist drills when drilling
holes.
Drilling holes of a diameters greater than 18mm should be carried out by preliminary
drilling where a diameter of a first hole should be 0,7 of a final hole diameter.
For example: When drilling a 23mm diameter hole it is recommended to initially drill it using a
drill bit of 16mm in diameter and to increase a size of a tool gradually to reach a diameter of
the desired hole.
Holes diameter
[mm]
Drills diameter [mm]
Number
of passes
Drilling
Expanding the
hole by drilling
for 18
for 18
1
18,1 - 23
0,7 final hole
diameter
final hole diameter
2
Содержание MB-45
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Страница 22: ...MODEL MB 45 MODEL MB 45 Operator s manual for Drilling Machine 22 V ELECTRICAL DIAGRAM ...
Страница 23: ...MODEL MB 45 MODEL MB 45 Operator s manual for Drilling Machine 23 VI DRAWINGS AND SPARE PARTS LIST ...
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