CAT 40, CAT 50 Retention Knobs

CAT Retention Knobs

Please make sure that the Retention Knob you order is the correct one for your machine. Using the wrong Retention Knob can cause damage to your machine spindle, the tool holder, and may cause a safety hazard.

Features:

  • All mating surfaces precision ground
  • Manufactured to the highest standards
    for maximum safety and long life
  • Hardened for maximum longevity
ANSI Style

ANSI Knobs

MAS Style

MAS Knobs

Related Links:
Retention Knobs Sockets

CAT Retention Knobs

Part No. Description
Ø
d1
d2
d3
L
l1
l2
T
21006-15 CAT 40-DIN
15°
.75"
0.55"
0.640"
1.88"
1.024"
.787"
5/8 - 11"
21007-15 CAT 40-DIN
15°
.75"
0.55"
-
1.89"
1.028"
.792"
5/8 - 11"
21003 CAT 40-ANSI
45°
0.740"
0.490"
0.490"
1.50"
0.640"
.440"
5/8 - 11"
21003-45 CAT 40-MAS-I
45°
0.590"
0.394"
0.512"
2.25"
1.266"
.990"
5/8 - 11"
21003-60 CAT 40-MAS-II
60°
0.590"
0.394"
0.512"
2.25"
1.266"
.990"
5/8 - 11"
21003-90 CAT 40-MAS-III
90°
0.590"
0.394"
0.512"
2.25"
1.266"
.990"
5/8 - 11"
21005-45 CAT 50-MAS-I
45°
0.906"
0.669"
0.827"
3.346"
1.772"
1.378"
1 - 8"
21005-60 CAT 50-MAS-II
60°
0.906"
0.669"
0.827"
3.346"
1.772"
1.378"
1 - 8"
21005-90 CAT 50-MAS-III
90°
0.906"
0.669"
0.827"
3.346"
1.772"
1.378"
1 - 8"
21008-15 CAT 50-DIN
15°
1.101"
0.825"
-
2.640"
1.338"
.984 "
1 - 8"
21005 CAT 50-ANSI
45°
1.140"
0.820"
0.820"
2.30"
1.00"
.700"
1 - 8"

CAT Coolant Thru Retention Knobs

Part No. Description
Ø
d1
d2
d3
L
l1
l2
T
17836 CAT40, ANSI w/ metric threads 45º 0.74" 0.49" 0.49" 1.50" 0.63" 0.56" M16x2
21006-15C CAT 40-DIN Coolant
15°
0.75"
0.55"
0.640"
1.88"
1.024"
.787"
5/8 - 11"
21007-15C CAT 40-DIN Coolant
15°
0.75"
0.55"
-
1.89"
1.028"
.792"
5/8 - 11"
21148-C CAT40-Coolant Mori-Seiki 15° 0.747" 0.548" 0.641" 2.004" 1.024" .787" 5/8 - 11"
21003-C CAT 40-ANSI-C
45°
0.740"
0.490"
0.490"
1.50"
0.640"
.440"
5/8 - 11"
21003-45C CAT 40-Coolant-I
45°
0.590"
0.394"
0.512"
2.25"
1.266"
.990"
5/8 - 11"
21003-60C CAT 40-Coolant-II
60°
0.590"
0.394v
0.512"
2.25"
1.266"
.990"
5/8 - 11"
21003-90C CAT 40-Coolant-III
90°
0.590"
0.394"
0.512"
2.25"
1.266"
.990"
5/8 - 11"
21003-45CSF CAT 40-Coolant-I Slim Fit
45°
0.590"
0.394"
0.512"
2.25"
1.266"
.990"
5/8 - 11"
21003-60CSF CAT 40-Coolant-II Slim Fit
60°
0.590"
0.394v
0.512"
2.25"
1.266"
.990"
5/8 - 11"
21003-90CSF CAT 40-Coolant-III Slim Fit
90°
0.590"
0.394"
0.512"
2.25"
1.266"
.990"
5/8 - 11"
21005-45C CAT 50-Coolant-I
45°
0.906"
0.669"
0.827"
3.346"
1.772"
1.378"
1 - 8"
21005-60C CAT 50-Coolant-II
60°
0.906"
0.669"
0.827"
3.346"
1.772"
1.378"
1 - 8"
21005-90C CAT 50-Coolant-III
90°
0.906"
0.669"
0.827"
3.346"
1.772"
1.378"
1 - 8"
21008-15C CAT 50-DIN Coolant
15°
1.101"
0.825"
-
2.640"
1.338"
.984"
1 - 8"
21005-C CAT 50-ANSI-C
45°
1.140"
0.820"
0.820"
2.30"
1.00"
.700"
1 - 8"