MINIDEX CHARACTERISTICS
The Kamo Seiko MINIDEX is an extremely small intermittent motion
pneumatically driven actuator. The MINIDEX offers double ended output
shafts that are incorporated in a manner that allows the use of an
integrated pneumatic drive with both indexing and positioning
capability as standard. Stop positions of the MINIDEX are exact with
the use of internal locking pins and contribute to accuracy of
positioning and repeatability without overrunning or external stops.
The compact cylindrical form factor of the MINIDEX allows for
installation in limited space without sacrificing performance or
accuracy. Available in various stop locations per revolution of output
shaft, the MINIDEX is a versatile device unmatched by another device
of its size.
|
PLUMBING METHOD |
INDEXING METHOD |
 |
 |
INTERNAL CONSTRUCTION (TYPICAL)
MOTION PROFILE
One complete index of the MINIDEX is achieved with a compound
movement as illustrated below.
SPECIFICATIONS
| Item/Model |
Unit |
MD20 |
MD30 |
MD50 |
MD75 |
Notes |
| Index Number |
Stops |
2,3,4,6,8 |
2,3,4,5,
6,8,10,12 |
2,3,4,5,
6,8,10,12 |
2,3,4,5,
6,8,10,12 |
|
| Index Accuracy |
arc•min |
±12 |
±8 |
±6 |
±4 |
arc minutes |
| Index Speed |
seconds |
0.5 |
0.5 |
1.0 |
1.5 |
no load (t) |
| Maximum Air Pressure |
kg/cm²
psi |
7
(100) |
7
(100) |
7
(100) |
7
(100) |
|
| Index Torque |
|
Air Pressure Dependent – See
Chart |
| Internal Volume |
cm³
(ci) |
10
(.61) |
18
(1.1) |
150
(9.2) |
220
(13.4) |
|
| Body Weight |
kg
(lbs) |
0.5
(1.1) |
0.8
(1.8) |
4.5
(10) |
12
(26) |
|
| Minimum Holding Torque |
N • m
(lb • in) |
0.49
(4.4) |
2.94
(26) |
11.7
(104) |
51
(450) |
at 60 psi |
| Load Inertia |
kg•cm²
(in•lb•sec²) |
50
(.044) |
100
(.089) |
1000
(.885) |
6000
(5.31) |
Maximum Value |
| Operating Load - Axial |
N
(lbs) |
9.8
(2.2) |
24.5
(5.5) |
58.8
(13.2) |
98.0
(22.4) |
Load at shaft end |
| Operating Load - Radial |
N
(lbs) |
14.7
(3.3) |
29.4
(13.2) |
98.0
(22.0) |
196
(44) |
Load at shaft end |
| Lubrication |
|
NR |
NR |
NR |
NR |
|
DIMENSIONS
MD SERIES DIMENSIONS
Model No.\
Letter |
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
N |
O |
P |
| MD20 |
37 |
93 |
143 |
35 |
35 |
4 |
4 |
20 |
25 |
3x1.8x16 |
8h7 |
22h7 |
67º30' |
M5 |
4–M4
x10 |
30 |
| MD30 |
50 |
112 |
164 |
58 |
32 |
7 |
5 |
20 |
20 |
3x1.8x16 |
8h7 |
28h7 |
22º30' |
Rc 1/8 |
4–M5
x12 |
40 |
| MD50 |
70 |
182 |
250 |
85 |
61 |
2 |
2 |
32 |
32 |
4x2.5x25 |
12h7 |
36h7 |
20º |
Rc 1/4 |
6–M6
x13 |
58 |
| MD75 |
100 |
260
(215) |
370
(325) |
135
(105) |
65 |
3 |
3 |
52 |
52 |
5x3x40 |
17h7 |
50h7 |
on line |
Rc 1/4 |
6–M8
x15 |
70 |
Note: Dimensions in ( ) for MD75 are for
models with 6 stops or more.
|
MODEL SELECTION
MD (20, 30, 50, 75), (NUMBER OF STOPS)
INERTIA / INDEX TIME
RELATIONSHIP
When designing the MINIDEX into an application, the load
inertia, JL should be within the
specified values. There is a correlation between indexing time
and load inertia so care should be taken in determining the
MINIDEX model and the indexing time to load inertia
relationship.
| Model No. \ Value |
t (sec) |
Jmax
(in•lb•sec²) |
| MD20 |
0.5 |
0.044 |
| MD30 |
0.5 |
0.089 |
| MD50 |
1.0 |
0.885 |
| MD75 |
1.5 |
5.310 |
|
Example: MD30-4 is defined as a Model
MD30 with 4 stops per revolution.
 |
AIR PRESSURE / INDEX TORQUE
RELATIONSHIP
 |
