Page 236 Penn Tool Co. Precision Tooling Buyer's Guide 2019
P. 236
234
"T"
"A"
"D1"
"D2"
"D3"
"D4"
"L3"
THREADS
ANGLE
KNOB
NECK
HOLE
PILOT
"L"
"L1"
FLANGE
FORM
DIA./
RAD.
DIA.
DIA.
DIA.
DIA.
OAL
L.
THICK.
PART
DWG.
PITCH
(°)
(IN.)
(IN.)
(IN.)
(IN.)
(IN.)
(IN.)
(IN.)
NUMBER
PRICE
BT-30
F
M12 x 1.75
45
0.428
0.271
—
0.490
1.699
0.710
0.19
35-127-0
$21.00
F
M12 x 1.75
60
0.428
0.271
—
0.490
1.699
0.710
0.19
35-128-8
25.00
BT-40
B
M16 x 2
45
0.740
0.491
0.280
0.669
1.650
0.440
0.12
35-130-4
$33.00
B
M16 x 2
45
0.740
0.490
—
0.669
1.853
0.552
0.23
35-131-2
40.00
D
M16 x 2
90
0.589
0.391
—
0.669
2.362
1.100
0.23
35-132-0
31.00
F
M16 x 2
15
0.748
0.550
—
0.669
2.126
0.905
0.28
35-133-8
25.00
F
M16 x 2
15
0.748
0.550
0.276
0.669
2.126
0.905
0.28
35-134-6
30.00
F
M16 x 2
45
0.589
0.391
0.197
0.669
2.362
1.100
0.23
35-135-3
38.00
F
M16 x 2
45
0.589
0.391
—
0.669
2.362
1.100
0.23
35-669-1
25.00
F
M16 x 2
60
0.589
0.394
0.197
0.669
2.363
1.100
0.24
35-136-1
38.00
F
M16 x 2
60
0.589
0.391
—
0.669
2.362
1.100
0.23
35-137-9
25.00
CT-40
B
5
⁄ -11
8
45
0.740
0.490
0.281
0.635
1.624
0.440
1.60
35-139-5
$20.00
C
5
⁄ -11
8
90
0.589
0.391
0.197
—
2.136
0.988
0.23
35-140-3
21.00
D
5
⁄ -11
8
90
0.589
0.391
—
0.635
2.250
0.988
0.23
35-143-7
25.00
D
5
⁄ -11
8
90
0.589
0.391
—
0.635
2.037
0.775
0.19
35-144-5
37.00
E
5
⁄ -11
8
60
0.588
0.392
0.197
—
2.130
0.988
0.23
35-145-2
38.00
F
5
⁄ -11
8
45
0.589
0.392
—
0.635
2.250
0.988
0.24
35-149-4
25.00
F
5
⁄ -11
8
45
0.589
0.392
0.200
0.635
2.250
0.988
0.24
35-150-2
32.00
F
5
⁄ -11
8
60
0.589
0.391
—
0.635
2.250
0.988
0.23
35-151-0
25.00
G
5
⁄ -11
8
15
0.744
0.549
—
—
1.884
0.787
0.28
35-152-8
25.00
G
5
⁄ -11
8
15
0.744
0.549
0.276
—
1.884
0.787
0.28
35-153-6
32.00
G
5
⁄ -11
8
45
0.588
0.392
—
—
2.265
1.000
0.24
35-154-4
25.00
G
5
⁄ -11
8
45
0.589
0.404
—
—
2.298
1.137
0.19
35-155-1
30.00
G
5
⁄ -11
8
45
0.589
0.404
0.157
—
2.298
1.137
0.19
35-156-9
35.00
G
5
⁄ -11
8
45
0.589
0.391
—
—
2.130
0.988
0.13
35-157-7
25.00
G
5
⁄ -11
8
45
0.589
0.391
0.157
—
2.130
0.988
0.13
35-158-5
32.00
G
5
⁄ -11
8
60
0.589
0.391
—
—
2.130
0.988
0.13
35-159-3
32.00
J
5
⁄ -11
8
75
0.746
0.550
0.281
—
1.880
0.789
0.18
35-160-1
32.00
BT-50
D
M24 x 3
90
0.904
0.667
—
0.983
3.340
1.376
0.39
35-162-7
$35.00
F
M24 x 3
45
0.904
0.667
0.250
0.983
3.340
1.376
0.39
35-163-5
40.00
F
M24 x 3
45
0.904
0.667
—
0.983
3.340
1.376
0.39
35-164-3
28.00
F
M24 x 3
60
0.904
0.667
—
0.983
3.340
1.376
0.39
35-165-0
35.00
CT-50
A
1-8
45
1.140
0.820
—
—
2.300
0.700
0.20
35-166-8
$24.00
A
1-8
45
1.140
0.820
0.468
—
2.300
0.700
0.20
35-167-6
24.00
B
1-8
45
1.140
0.820
0.390
1.026
2.300
0.700
0.20
35-168-4
35.00
B
1-8
45
1.140
0.820
0.468
1.031
2.300
0.700
0.20
35-169-2
37.00
C
1-8
90
0.904
0.669
—
—
3.080
1.388
0.40
35-170-0
28.00
C
1-8
90
0.904
0.667
—
—
3.071
1.376
0.39
35-171-8
28.00
D
1-8
90
0.904
0.669
0.250
1.026
3.240
1.388
0.40
35-173-4
33.00
F
1-8
45
0.899
0.663
—
1.026
3.350
1.376
0.41
35-178-3
28.00
F
1-8
45
0.899
0.663
0.390
1.026
3.350
1.376
0.41
35-179-1
33.00
F
1-8
60
0.904
0.667
—
1.026
3.350
1.376
0.39
35-180-9
28.00
J
1-8
75
1.101
0.825
0.468
—
2.645
0.990
0.20
35-181-7
40.00
CAUTION:
Use of incorrect retention knob can result in serious damage and
personal injury. When in doubt about the dimensions of your
knob, Email Technical Support
techsupport@swissprec.com
with details of machine, make and model number.
35-140-3
Form A
Form B
Form C
Form F
Form G
Form J
Form D
Form E
CNC Toolholder Retention Knobs
Retention Knob Safety!
- Retention knobs are not intended to last forever. Your Safety Program must include
Retention Knob Inspections. Knobs must be visually inspectedfor damage and checked for tightness every
time the tool in the holder is changed.
Every 2 or 3 years, depending on use, knobs should be removed from the holder and Magnetic Particle Inspected.
Any Retention Knobs showing indications of cracking must be discarded. If your machine is in a crash, or releases a tool
prematurely, this is an indication that either the Retention Knob Fingers, Finger Guide, Belleville Washers in the Spindle,
or the Retention Knob is damaged.
The machine tool should not be used until inspected by Maintenance Personnel.
In this case all the retention knobs in the machine should be checked for cracks or damage immediately.
"T"
"A"
"D1"
"D2"
"D3"
"D4"
"L3"
THREADS
ANGLE
KNOB
NECK
HOLE
PILOT
"L"
"L1"
FLANGE
FORM
DIA./
RAD.
DIA.
DIA.
DIA.
DIA.
OAL
L.
THICK.
PART
DWG.
PITCH
(°)
(IN.)
(IN.)
(IN.)
(IN.)
(IN.)
(IN.)
(IN.)
NUMBER
PRICE
BT-30
F
M12 x 1.75
45
0.428
0.271
—
0.490
1.699
0.710
0.19
35-127-0
$21.00
F
M12 x 1.75
60
0.428
0.271
—
0.490
1.699
0.710
0.19
35-128-8
25.00
BT-40
B
M16 x 2
45
0.740
0.491
0.280
0.669
1.650
0.440
0.12
35-130-4
$33.00
B
M16 x 2
45
0.740
0.490
—
0.669
1.853
0.552
0.23
35-131-2
40.00
D
M16 x 2
90
0.589
0.391
—
0.669
2.362
1.100
0.23
35-132-0
31.00
F
M16 x 2
15
0.748
0.550
—
0.669
2.126
0.905
0.28
35-133-8
25.00
F
M16 x 2
15
0.748
0.550
0.276
0.669
2.126
0.905
0.28
35-134-6
30.00
F
M16 x 2
45
0.589
0.391
0.197
0.669
2.362
1.100
0.23
35-135-3
38.00
F
M16 x 2
45
0.589
0.391
—
0.669
2.362
1.100
0.23
35-669-1
25.00
F
M16 x 2
60
0.589
0.394
0.197
0.669
2.363
1.100
0.24
35-136-1
38.00
F
M16 x 2
60
0.589
0.391
—
0.669
2.362
1.100
0.23
35-137-9
25.00
CT-40
B
5
⁄ -11
8
45
0.740
0.490
0.281
0.635
1.624
0.440
1.60
35-139-5
$20.00
C
5
⁄ -11
8
90
0.589
0.391
0.197
—
2.136
0.988
0.23
35-140-3
21.00
D
5
⁄ -11
8
90
0.589
0.391
—
0.635
2.250
0.988
0.23
35-143-7
25.00
D
5
⁄ -11
8
90
0.589
0.391
—
0.635
2.037
0.775
0.19
35-144-5
37.00
E
5
⁄ -11
8
60
0.588
0.392
0.197
—
2.130
0.988
0.23
35-145-2
38.00
F
5
⁄ -11
8
45
0.589
0.392
—
0.635
2.250
0.988
0.24
35-149-4
25.00
F
5
⁄ -11
8
45
0.589
0.392
0.200
0.635
2.250
0.988
0.24
35-150-2
32.00
F
5
⁄ -11
8
60
0.589
0.391
—
0.635
2.250
0.988
0.23
35-151-0
25.00
G
5
⁄ -11
8
15
0.744
0.549
—
—
1.884
0.787
0.28
35-152-8
25.00
G
5
⁄ -11
8
15
0.744
0.549
0.276
—
1.884
0.787
0.28
35-153-6
32.00
G
5
⁄ -11
8
45
0.588
0.392
—
—
2.265
1.000
0.24
35-154-4
25.00
G
5
⁄ -11
8
45
0.589
0.404
—
—
2.298
1.137
0.19
35-155-1
30.00
G
5
⁄ -11
8
45
0.589
0.404
0.157
—
2.298
1.137
0.19
35-156-9
35.00
G
5
⁄ -11
8
45
0.589
0.391
—
—
2.130
0.988
0.13
35-157-7
25.00
G
5
⁄ -11
8
45
0.589
0.391
0.157
—
2.130
0.988
0.13
35-158-5
32.00
G
5
⁄ -11
8
60
0.589
0.391
—
—
2.130
0.988
0.13
35-159-3
32.00
J
5
⁄ -11
8
75
0.746
0.550
0.281
—
1.880
0.789
0.18
35-160-1
32.00
BT-50
D
M24 x 3
90
0.904
0.667
—
0.983
3.340
1.376
0.39
35-162-7
$35.00
F
M24 x 3
45
0.904
0.667
0.250
0.983
3.340
1.376
0.39
35-163-5
40.00
F
M24 x 3
45
0.904
0.667
—
0.983
3.340
1.376
0.39
35-164-3
28.00
F
M24 x 3
60
0.904
0.667
—
0.983
3.340
1.376
0.39
35-165-0
35.00
CT-50
A
1-8
45
1.140
0.820
—
—
2.300
0.700
0.20
35-166-8
$24.00
A
1-8
45
1.140
0.820
0.468
—
2.300
0.700
0.20
35-167-6
24.00
B
1-8
45
1.140
0.820
0.390
1.026
2.300
0.700
0.20
35-168-4
35.00
B
1-8
45
1.140
0.820
0.468
1.031
2.300
0.700
0.20
35-169-2
37.00
C
1-8
90
0.904
0.669
—
—
3.080
1.388
0.40
35-170-0
28.00
C
1-8
90
0.904
0.667
—
—
3.071
1.376
0.39
35-171-8
28.00
D
1-8
90
0.904
0.669
0.250
1.026
3.240
1.388
0.40
35-173-4
33.00
F
1-8
45
0.899
0.663
—
1.026
3.350
1.376
0.41
35-178-3
28.00
F
1-8
45
0.899
0.663
0.390
1.026
3.350
1.376
0.41
35-179-1
33.00
F
1-8
60
0.904
0.667
—
1.026
3.350
1.376
0.39
35-180-9
28.00
J
1-8
75
1.101
0.825
0.468
—
2.645
0.990
0.20
35-181-7
40.00
CAUTION:
Use of incorrect retention knob can result in serious damage and
personal injury. When in doubt about the dimensions of your
knob, Email Technical Support
techsupport@swissprec.com
with details of machine, make and model number.
35-140-3
Form A
Form B
Form C
Form F
Form G
Form J
Form D
Form E
CNC Toolholder Retention Knobs
Retention Knob Safety!
- Retention knobs are not intended to last forever. Your Safety Program must include
Retention Knob Inspections. Knobs must be visually inspectedfor damage and checked for tightness every
time the tool in the holder is changed.
Every 2 or 3 years, depending on use, knobs should be removed from the holder and Magnetic Particle Inspected.
Any Retention Knobs showing indications of cracking must be discarded. If your machine is in a crash, or releases a tool
prematurely, this is an indication that either the Retention Knob Fingers, Finger Guide, Belleville Washers in the Spindle,
or the Retention Knob is damaged.
The machine tool should not be used until inspected by Maintenance Personnel.
In this case all the retention knobs in the machine should be checked for cracks or damage immediately.
