Bonfiglioli C-series ATEX gearbox selection and explosion-proof application guide

Overload protection: The parameter setting of the frequency converter must ensure that the reducer will not exceed its mechanical design limit due to low-frequency high torque or high-frequency overspeed.

Quick search of key selection parameters and engineering guidance

For the convenience of engineers to quickly refer to, the core physical quantity definitions and their engineering significance in the selection table are listed below. These parameters are hard indicators for evaluating the performance of reducers:

Definition and Significance of Symbolic Unit Engineering

Mn ₂ [Nm] rated output torque. This is the "sea fixing needle" of the gearbox, representing the torque that can be continuously transmitted when fs=1. When selecting, the torque required by the user should be ≤ Mn ₂.

Pn ₁ [kW] rated input power. Corresponding to the mechanical power at Mn ₂. Used to match IEC motors.

Fs - Service coefficient. Considering load fluctuations and startup frequency is the core weight coefficient for selection.

Rn ₂/Rn ₁ [N] allowable radial load. Determine the force that external sprockets, gears, or belts can apply to the shaft. The applied radial force must be less than this value.

An ₂/An ₁ [N] allowable axial load. Usually 20% of the radial load, it can be increased to 50% when there is no radial force.

Mc ₂ [Nm] calculates torque. For selection with solid input shaft (without motor), Mc ₂=Mr ₂ × fs × ftp (ftp is the temperature coefficient, usually 1).