BASIC ARBORS
BIG-PLUS Taper Catalog Number
Standard Taper Catalog Number
Weight (lbs.)
Reference Drill Dia. (JIS B4302 1)
Fig.
MT
øD
øD 1
L
L 1
L 2
BBT50-MTA3-45
BT50-MTA3-45
1.77 2.95 5.91 7.09 8.27 9.84
.28
8.4 8.6
1
- 75 -150 -180 -210 -250 -300
—
1.46 4.41 5.59 6.77 8.35
-150 -180
—
—
10.1 10.8 11.2 12.3 13.9
2
3
1.575
.925-1.240
—
3
1.988
4.53
11.81
10.31
-MTA4-75
-MTA4-75
1
2.95 7.09 8.27 9.84
1.46 5.59 6.77 8.35
8.6
-180 -210 -250 -300
-180
11.9 12.3 13.7 15.4
4
1.969
—
—
1.260-1.969
2
—
11.81
10.31
-MTA5-105
-MTA5-105
1 2
4.13 8.27
2.64 6.77
9.9
5
2.559
—
—
2.008-2.992
-210
-210
15.9
• The model, dimensions and accuracy conform to TMT standards
137
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