Our S-SZ series worm-gear speed reducers are crafted from nodular cast iron G-25. The square housing facilitates adjustments from any of its three machined surfaces.
The structural integrity of this design is a result of the block, which withstands the forces generated between the worm gear and the wheel. This feature contributes to a longer operational efficiency than what is found in the MF series.
If required, we can offer this style of speed reducer constructed from GGG-40 nodular cast iron, making it beneficial for machine support.
Structural Features
The worm-gear reducer comprises three key components: housing, worm gear, and wheel.
The housings are crafted from GG-25 nodular cast iron, suitable for all sizes of this model, ensuring outstanding performance against fatigue, vibrations, and any other issues that may arise during assembly.
This worm-gear reducer features a worm made from cemented steel, with the teeth flanks rectified, while the crown consists of bronze (DIN GZ-CuSn 12 Ni2) that is melted onto steel. The mechanical quality of these components results in excellent performance and low noise levels.
The output shaft is hollow but can also be adapted for a solid shaft if necessary.
The oil seal, made from NITRILE BUTADIENE in accordance with DIN 3760, high-grade bearings, a two-component EPOXY-impregnated finish, and a grey SINGLE LAYER ENAMEL finish (RAL 7672) make this gear reducer highly competitive in the market.
Assembly Position
For the successful setup of a gear reducer and to ensure it functions properly, please consider the following instructions:
Backdriving
Attention to this aspect is crucial when the output shaft of the gear reducer is driven instead of functioning as the driver. It’s essential to note that one of the defining features of this worm-gear reducer is its inability to be driven by the output shaft (irreversibility). Total irreversibility conditions are almost impossible to maintain due to external factors such as vibrations. Consequently, if the application demands total irreversibility, it is advisable to incorporate external brakes that provide sufficient power to prevent any slipping.
The conditions under which irreversibility may occur include:
• Output < 0.55 (see the technical specifications table).
Maintenance
This type of gear reducer comes with a built-in permanent lubrication feature, which means it requires no maintenance whatsoever.
Lubrication
This gear reducer type is equipped with a standard constant lubrication system that utilizes high-quality refined oil. This oil contains anti-rust and anti-wear agents with Fe, Cu, and alloy protectors, adhering to CLP DIN 51517-3, FGZ level 12, AP GL-4, US 224, and AGMA 250-04 quality levels. Therefore, maintenance is not necessary.
