WIDIA - Полный каталог инструмента - 2017
Technical Information
TopThread™
для размещения заказа - zakaz@widiahanita.ru
American Buttress (45° Clearance Flank Leading): NTB-B Inserts • PULL-type
chuck
anti-clockwise rotation
feed
NTB-2LB
NTB-3LB
45° clearance
flank of the
NTB-4LB
thread being
the leading flank
Internal Buttress
45° clearance flank leading
Reference Dimensions
“A” reference
nose radius
D
maximum depth with
“B” style insert
chuck
antianti-clockwise rotation
45°
feed
NTB-2RB
NTB-3RB
NTB-4RB
45° clearance flank of
the thread being the
leading flank
Insert vs. Toolholder Orientation
external
internal
NTB-2RB
NTB-3RB
NTB-4RB
insert
notch
sealing
surface in
toolholder
insert
notch
sealing
surface
in bar
NTB-2LB
NTB-3LB
NTB-4LB
External Buttress
45° clearance flank leading
45° clearance flank leading
Infeed Angle vs. Chip Load: 45° Clearance Flank Leading
.010" infeed
.0052"
chip load
.0039"
chip load
.007"
chip load
.010" infeed
.0012"
chip load
15° infeed angle
0° infeed angle
NTB-B insert
insert
D
(inch)
“A” reference
(inch)
NTB-3B
.171
.031
NOTE: For balanced chip load, a reverse 15° infeed angle is suggested.
nose radius
(inch)
.005–.004
pitch based on
maximum radius
8–16 TPI
Internal Threading Limitations
internal threading limitations
NTB-2B Buttress threading inserts
internal threading limitations
NTB-3 and NTB-4B Buttress threading inserts
TPI nominal minimum minor
thread size
diameter
(inch)
8 1-3/4
1.600
TPI nominal minimum minor
thread size
diameter
(inch)
4* 2-7/8
2.575
10 1-5/8
1.505
5 2-3/4
2.510
12 1-1/2
1.400
6 2-3/8
2.175
16 1-1/4
1.175
8 2-1/8
1.975
20 1-1/16
1.002
10 1-7/8
1.755
12 1-5/8
1.525
16 1-1/2
1.407
20 1-7/16
1.378
*NTB-4B insert only.
F96
zakaz@widiahanita.ru
www.widiahanita.ru