TM 9-3419-234-14&P
DIMENSIONS
R-TYPE
4"R
6"R
SECTION VIII
SPECIFICATIONS
4"R
6"R
Dim.
Inches
M/M
Inches
M/M
Range - Inches
1 to 4
2 1/2 to 6
A
15 1/2
393.7
16 1/2
419.1
Range - M/M
24 to 102
64 to 153
B*
18 5/16
456.2
17 9.16
446.1
Range - Pipe Size
1 to 4
2 1/2 to 6
C*
12 1/3 5/2
316.7
12 7/32
310.3
Coarsest Pitch-Threads per in.*
3
3
D
4 13/16
122.24
7
177.8
Coarsest Pitch-M/M*
7.5
7.5
E
11
279.4
11
279.4
Weight-Lbs
465 3/4
505
F
3/8
9.52
3/8
9.52
Weight- Kgms.
211.26
228.07
G
9 3/4
247.65
9 3/4
247.65
Code Word
YDKBR
YDKAR
H
5/8 N.C.
15.88
5/8 N.C.
15.88
Coarser pitch threads can be produced dependent on
J
15/16
23.8
31/32
24.6
thread form, material, etc. Write for details enclosing print
L
9 19/32
243.7
9 17/32
242.1
of workpiece.
M
1 1/2
38.1
1 1/2
38.1
P
12 7/8
327.0
14 3/8
365.1
R
2 19/32
65.9
2 17/32
64.3
"B" AND "C" Dimensions are based upon the use of
standard, maximum range N.C. Chaser Holders.
Chaser Holder Specifications
Thread
Thread
Standard
4"R
6"R
Standard
4"R
6"R
1 to 1 1/2
2 1/2 to 2 3/4
1 to 2
2 1/2 to 3
(24 to 39 M/M)
(64 to 72 M/M)
(1 1/4 x 4 Chaser)
(2 1/4 x 5 Chaser)
U.N.C.,
(1-3/64 X 4 Chaser)
(1 1/2 x 5 Chaser)
Pipe
2 1/2 to 4
3 1/2 to 4
(2 1/4 x 5 Chaser)
N.C.,
(40 to 64 M/M)
72 to 102 M/M)
4 1/2 to 6
&
(1 1/2 x 5 Chaser)
(1 1/2 x 5 Chaser)
(2 1/4 x 5 Chaser)
S.I.
2 5/8 to 4
1 to 1 1/2
2 1/2 to 3 1/2.
(68 to 102 M/M)
(1 3/64 x 4 Chaser)
(1 1/2 x 5 Chaser)
(1 1/2 x 5 Chaser)
1 5/8 to 2 1/2
2 1/2 to 3 1/2
U.N.F.
1 1/8 TO 1 1/2
1 1/2 X 5 Chaser
(1-3/64 x 4 Chaser)
& N.F.
(1-3/64 x 4 Chaser)
2 5/8 to 4
2 7/8 to 4
1 to 1 1/2
2 1/2 to 3 1/2
2 5/8 to 4
2 7/8 to 4
1-3/64 x 4 Chaser
(1 1/2 x 5 Chaser)
Special
(1 1/2 x 5 Chaser
(1-3/64 x 4 Chaser)
1 5/8 to 3 1/2
3 3/4 to 4
Chaser
1 5/8 to 4
4 1/8 to 5 1/4
(1 1/2 x 5 Chaser
(2 1/4 x 5 Chaser)
Holders
(1-3/64 x 4 Chaser)
(1 1/2 x 5 Chaser)
Whit.
3 3/4 to 4
4 1/8 to 5 1/4
(1 3/64 x 4 Chaser)
2 1/4 x 5 Chaser)
5 3/8 to 6 5/8
(1 1/2 x 5 Chaser)
5 3/8 to 6 5/8
(1-3/64 x 4 Chaser)
OVERSIZE CHASER HOLDERS
4"R
Inches
M/M
Range
4 1/8 to 5 1/4
105 to
134
Coarsest Pitch
6 TPI
4.0
Max. Thread Length
3 1/8
79.0
*Not available for 6 R Heads. Refer to page 9 for clarification note on oversize chaser holder capabilities.
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