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>>Terminology
for the gear reducers
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1.Selections
of the speed reduction gearing (mechanism)
To coordinate between the type of motor and wattage of power used, the following
classification is made according to the loading conditions:
Model GN- for
6W, 25W, 40W - (Oil bearing for applications in light loading, ball bearing shall
be sed for those heavier loading) Model GU- for 60W, 90W - (using ball bearing
for all GU type motor)
2.Calculations of a speed
reduction gear in relating to the torque of the motor output power：
Torque: TG=TM xｉxｎ
TG=torque of the speed reduction gearing (kg/cm)
TM:Torque
of a motor (kg/cm)
ｉ=Reduction ratio of the speed reduction gearing
ｎ=transmission
efficiency of he speed reduction gearing
3.Maximum
allowable torque (Figure to the right)
The torque for a motor output
power can be increased in accordance with the bigger reduction ratio of the speed
reduction gearing. However, the practical limitation of the loading torque shall
be effected by the material of the gear and some other conditions. The Maximum
allowable torque for a speed reduction gearing is also depending on the kind of
speed reduction gearing and the output power torque of the speed reduction gearing.
TG=TM xｉxｎ=1.9x100x0.66=125.4kg/cm
The maximum allowable torque 80 kg/cm
for the A4GN 100K is shown in the figure to the right, in comparing to the output
power torque of the speed reduction gearing, 125kg/cm, by calculation. In practical,
however, under no way the loading of a speed reduction gearing exceed 80kg/cm.
4.Allowable
suspension load and allowable thrust load (see figure to the right):
Transmission mechanism such as chain, gears, or belt can be used as on output
shaft for the speed reduction gearing. Suppose the suspension load is increased
(vertically to the shaft) at the output shaft which should be effected directly
against the applicable life regarding to relations between suspension load and
thrust load. | |
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| Gear
Model No. |
Ratio |
Max.
allowable torque
(kg/cm) |
Allowable
suspension load(kg) |
Allowable
thrust load
(kg) |
| Axis-front
10mm | Axis-front
20mm | |
2GN□
2GN□K |
3~18 |
25 |
5 |
8 |
3 |
| 20~180 |
12 |
18 | |
3GN□
3GN□K |
3~18 |
50 |
8 |
12 |
4 |
| 20~180 |
15 |
25 | |
4GN□
4GN□K |
3~18 |
80 |
10 |
15 |
5 |
| 20~180 |
20 |
30 | |
5GN□
5GN□K |
3~18 |
100 |
25 |
35 |
10 |
| 20~180 |
30 |
45 | |
5GU□KB
5GU□K |
3~10 |
200 |
40 |
50 |
15 |
| 12.5~18 |
45 |
60 | |
20~180 |
50 |
70 | |
5.Transmission
efficiency of the gear
reducers
| Gear
Model No.\ Ratio |
3 |
5 |
6 |
7.5 |
9 |
10 |
12.5 |
15 |
18 |
25 |
30 |
36 |
40 |
50 |
60 |
75 |
90 |
100 |
120 |
150 |
180 |
| 2GN□K
3GN□K
4GN□K
5GN□K |
81% |
73% |
66% |
| 5GU□K |
81% |
73% |
66% |
59% |
| | TOP
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