technical data Miter Bevel Gearbox Selection
If you would like to see the selection procedures and important points, please proceed below.
If you would like to narrow down or tentatively select a product series,
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If your usage conditions have been decided and you would like a detailed selection,
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Miter Gear Box selection
Conditions required for selection
1. Machinery, equipment, and layout used
2. Operating conditions
- - Type of engine
- Load torque N·m or transmission kW
- - Usage time (hours/day, continuous/intermittent)
- ・Start/stop frequency (times/hour)
- Input rotation speed (normal r/min, maximum r/min)
- ・Input shaft direction (lateral shaft/cross shaft)
- ・Speed ratio (1:1, 1.5:1, 2:1, 2.5:1, 3:1, etc.)
- -Characteristics of the load (uniform load, load with some impact, load with large impact)
3. Usage environment
- -Usage environment (indoors, outdoors, near a furnace, inside a freezer, etc.)
- Ambient temperature (normal, high, low)
- Ambient atmosphere: salt damage, dust, acid, etc.
4. Other
- ・Please refer to the catalog for options, special specifications, etc.
*Please also use the selection specification confirmation sheet.
Selection Procedure
Considering the selection requirements, the selection will be made according to the following procedure.
1. Determining Service factor
All kW ratings table in the catalog are values when Service factor is set to 1.0.
Determine Service factor Service factor Table 1 based on the conditions of use.
2. Determining the corrected torque or design kW
The correction torque or design kW is determined taking into consideration Service factor.
Corrected torque or design kW =
(Load torque or transmission kW applied to Miter Gear Box) x Service factor (Table 1)
Table 1 Service factor
| Load Nature | Operating time | ||
|---|---|---|---|
| 2 hours | 10 hours | 24 hours | |
| Uniform Load | 1.00 (1.00) |
1.00 (1.25) |
1.25 (1.50) |
| Load with some impact | 1.00 (1.25) |
1.25 (1.50) |
1.50 (1.75) |
| Loads with large impacts | 1.25 (1.50) |
1.50 (1.75) |
1.75 (2.00) |
Note)
- 1. If the start/stop frequency is 10 or more times per hour or if the prime mover is a multi-cylinder engine, use the values in parentheses.
- 2. The above Service factor are general guidelines. Please determine the coefficients taking into consideration the conditions of use.
3. Deciding on size
Select a size that satisfies the corrected torque or design kW at the rotational speed you are using from kW ratings table.
Also, check that the peak torque during start-up and shutdown is within 200% of the transmission capacity of the selected size.
4. Check the radial load
When driving sprockets, gears, pulleys, etc. attached to the lateral shaft or cross shaft, check the radial load using the formula below.
・Radial load confirmation formula
Allowable radial load ≧ T × f × Lf r
- T = Corrected torque N・m
- f = OHL coefficient (Table 2)
- Lf = Coefficient of operating position (Table 3)
- r = pitch circle radius of sprocket, pulley, etc. m
If the formula on the left is not satisfied after checking the radial load, then r, i.e. the pitch circle radius of the sprocket, pulley, etc., must be increased.
Table 2 OHL coefficient (f)
| Chain | 1.00 |
|---|---|
| gear Toothed belt |
1.25 |
| V-belts and heavy-duty toothed belts | 1.5 |
Table 3 Coefficient of action position (Lf)
| Load is at the center of the shaft or If it is further inward, ℓ ≦ Q 2 |
Lf = 1 |
|---|---|
| Load is from the center of the shaft If it is on the outside ℓ > Q 2 |
Lf = 2ℓ Q |
Q = Length of output shaft end ℓ = Position where radial load acts
Note) If a radial load and an axial load are applied at the same time, please contact us.
5. Determine shaft arrangement, rotational relationship, and mounting type - Determine model number
- ・Axis arrangement and rotation
Please select based on shaft arrangement and rotation relationship. (Pay attention to the direction of shaft rotation.) - ・Installation type
Please select based on the mounting format. (Sizes 2 and 4 are grease lubricated and there are no restrictions on the mounting direction.)
Please determine the model number based on the above conditions.
6. Consideration of options and special specifications
We also manufacture options and special specifications other than standard products, so please contact us.
