Overview: The document provides technical specifications and options for declutchable gearboxes, which are mechanically disengaged and automatically re-engaged by spring force. An optional limit switch box is available.

Specifications: The output shaft can be mechanically disengaged and re-engaged automatically by spring force. Dimensions and production ratios are provided for different types and motor sizes.

Dimensions: Detailed measurements are given for various components, including lengths (L1 to L20) and specific dimensions for different gearbox types (e.g., Type 40 and 50).

Production Ratios: The document lists various gear ratios available, ranging from 5 to 100, with specific configurations for different types.

Options: An optional limit switch box is available for these gearboxes.

Contact Information: G.M. S.r.l. Ghirri Motoriduttori, located in Formigine, Italy, provides contact details including phone, fax, website, and email.