WIDIA - Полный каталог инструмента - 2017
для размещения заказа - zakaz@widiahanita.ru
Technical Information
Screw Thread Denitions
resultant angle
insert size (iC)
toolholder
16mm
ex. RH/in. LH
ex. LH/in. RH
22mm
ex. RH/in. LH
ex. LH/in. RH
3.5
SM-YE3-2P
SM-YI3-2P
SM-YE4-2P
SM-YI4-2P
Slanted Shim Kit
Because you might occasionally need different shims than those
supplied with our standard toolholders, we strongly recommend
that shim kits be readily available in every tool shop.
2.5
SM-YE3-1P
SM-YI3-1P
SM-YE4-1P
SM-YI4-1P
insert size
3x
4x
1.5 0.5
shim ordering code
SM-YE3
SM-YI3
SM-YE3-1N
SM-YI3-1N
SM-YE4
SM-YI4
SM-YE4-1N
SM-YI4-1N
-0.5
SM-YE3-2N
SM-YI3-2N
SM-YE4-2N
SM-YI4-2N
-1.5
SM-YE3-3N
SM-YI3-3N
SM-YE4-3N
SM-YI4-3N
shim size (D)
16mm
22mm
ordering code
ABY3
ABY4
contains slanted shims
SM-YE3-2P, 1P, 1N, 2N, 3N
SM-YI3-2P, 1P, 1N, 2N, 3N
SM-YE4-2P, 1P, 1N, 2N, 3N
SM-YI4-2P, 1P, 1N, 2N, 3N
The Helix Angle
Example:
d = 48,06mm (1.892")
p = 3,175mm ( .125")
q = Helix angle
p = pitch
d = pitch diameter
( )q = arctan p * starts = 1.13°
/
Screw Thread Denitions
1. Major diameter — The largest diameter of a straight screw
thread. This applies to both internal and external threads.
2. Pitch diameter — On a straight thread, it is the diameter which
passes through the thread profiles at such points which make
the thread width of the groove equal to one-half of the basic
pitch. On a “perfect thread,” this occurs at the point where the
widths of the thread and groove are equal.
3. Thread angle (included) — The included angle between
the individual flanks of the thread form.
4. Minor diameter — The smallest diameter of a straight screw
thread. This applies to both internal and external threads.
5. Lead angle — On a straight thread, the lead angle is the angle
created by the helix of the thread at the pitch diameter with
a plane perpendicular to the axis.
6. Lead — The distance a screw thread advances axially in one
revolution. On a single start, the pitch and lead are identical.
The lead is equal to the pitch times the number of starts.
7. Pitch — The distance from a point on a screw thread to a
corresponding point on the next thread measured parallel
to the thread axis.
8. Crest — The outer most surface of the thread form which
joins the flanks.
9. Root — The inner most surface of the thread form which
joins the flanks.
nut
major diameter
pitch diameter
minor diameter
thread angle
included
screw
lead angle
lead
pitch
crest
root
NOTE: Threads per inch (TPI) not shown:
The number of threads per inch measured axially.
The terms pitch and TPI are often used interchangeably. TPI = 1/pitch
zakaz@widiahanita.ru
www.widiahanita.ru
F79