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GN 3971
Bevel Gear Boxes
Housing Aluminum
Main specifications
Versions
- Type L: angular gear 90°
- Type T: bevel gear with dual output shafts
Housing
- Aluminum
- Sealed to prevent dust entry
- Anodized, natural color AN
Bevel gear wheels
- Steel, case-hardened
Ball bearing
- Steel
- Sealed (sealing disks 2RS)
Working temperature: from -20°C to +60°C.
General information
Features and applications
Bevel gear boxes GN 3971 can transmit high torque despite their very compact dimensions. !da duplicazione! They can readily be used for a multitude of applications, such as height adjustments or to change the direction of shaft rotation.
They can readily be used for a multitude of applications, such as height adjustments or to change the direction of shaft rotation. The parallel keys can take any angular positions.
Mechanical features
| Gear ratio i | 1 : 1 |
| Circumferential backlash at the drive shaft | 3° ± 0.5° |
| Shaft direction of rotation | Any |
| Life expectancy (guideline) | 1.000 hours under full load at a rotational speed of 500 rpm, |
| assuming the gear box is operating for 20% of every 5 minutes | |
| (1 minute of operation + 4 minutes break) at an ambient temperature of 20 °C | |
| Maintenance | Permanent lubrication with grease, maintenance-free |
| b1 | Max. torque in Nm | Max. radial force in N* | Max. axial force in N** | ||
| at 100 min-1 | at 500 min-1 | at 1000 min-1 | |||
| 18 | 0.35 | 0.1 | 0.05 | 60 | 60 |
| 20 | 0.75 | 0.3 | 0.15 | 100 | 100 |
| 24 | 2.5 | 1 | 0.5 | 120 | 120 |
| 26 | 4 | 1.5 | 0.75 | 140 | 140 |
| 30 | 5 | 2 | 1 | 240 | 240 |
| 32 | 8 | 3 | 1.5 | 550 | 550 |
| 35 | 10 | 4 | 2 | 550 | 550 |
* At axial force = 0
** At radial force = 0
Assembly Instruction
Assembly Instruction
Do not exert any forces onto the housing or into the bearings during assembly. Use of the threaded holes d7 in the shaft is recommended. The use of a corresponding coupling is recommended to compensate for manufacturing-related shaft offsets and runout tolerances as well as for damping vibrations and shocks.
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