023PRX 060PRX 034PRX 090PRX
Dimension Code Inch (mm) Metric (in) Inch (mm) Metric (in)
Ratio 023PRX 060PRX 034PRX 090PRX
Moment of Inertia Table (2) (oz-in-sec
2
)
Gearhead Dimensions
4:1 2.190E-03 2.206E-03 1.554E-02 1.557E-02
5:1 1.887E-03 1.896E-03 1.310E-02 1.312E-02
7:1 1.661E-03 1.666E-03 1.117E-02 1.118E-02
10:1 1.547E-03 1.550E-03 1.018E-02 1.019E-02
16:1 1.852E-03 1.853E-03 1.303E-02 1.303E-02
20:1 1.670E-03 1.671E-03 1.149E-02 1.149E-02
25:1 1.659E-03 1.659E-03 1.139E-02 1.139E-02
28:1 1.551E-03 1.551E-03 1.036E-02 1.035E-02
35:1 1.545E-03 1.545E-03 1.030E-02 1.030E-02
40:1 1.493E-03 1.493E-03 9.778E-03 9.778E-03
50:1 1.490E-03 1.490E-03 9.753E-03 9.753E-03
70:1 1.488E-03 1.488E-03 9.734E-03 9.734E-03
100:1 1.487E-03 1.487E-03 9.724E-03 9.724E-03
Pilot Diameter (+.000/-.002 in) A 1.500 (38) 50 (1.969) 2.875 (73) 80 (3.150)
Square Flange B 2.25 (57) 60 (2.36) 3.45 (87) 90 (3.540)
Shaft Length C 1.25 (32) 30 (1.18) 1.50 (38) 40 (1.57)
Shaft Diameter (+.0000/-.0005 in) D 0.500 (13) 16 (0.6299) 0.75 (19) 22 (0.8661)
Pilot Length E 0.062 (2) 3 (0.118) 0.062 (2) 3 (0.118)
Flange Thickness F 0.250 (6.4) 6.4 (0.250) 0.375 (10) 9 (0.375)
Key Length G 0.75 (19) 20 (0.79) 0.98 (25) 25 (0.98)
Key Width (3) M 0.125 (3.18) 5 (0.1969) 0.188 (5) 6 (0.2362)
Key Height H 0.047 (1) 2 (0.079) 0.081 (2) 2.5 (0.098)
Housing Diameter I 2.95 (75) 80 (3.15) 4.58 (116) 116 (4.58)
Bolt Hole Diameter J 0.205 (5) 5.6 (0.220) 0.220 (5.6) 6.6 (0.260)
Bolt Circle Diameter K 2.625 (67) 70 (2.756) 3.875 (98) 100 (3.937)
Gearhead Length
(1) L1 3.23 (82) 82 (3.230) 4.73 (120) 120 (4.730)
L2 4.38 (111) 111 (4.380) 6.50 (165) 165 (6.500)
800.568.GEAR (4327) • www.cgimotion.com
pg 5
(1) Gearhead Length based on NEMA motor
mounting.
(2) Gearhead inertia values shown include pinion,
clamp and sleeve, and are for standard NEMA
mounting.
(3) Key Width tolerance for English keys is:
+.001 / -.000 in.
Key Width tolerance for Metric keys is:
+.000 / -.0012 in.
• All specifications are subject to change without
prior notice.
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