• The gearboxes feature a flange-style output face for easy mounting from the motor side, with an aluminum output housing (except for GNP 90, which is alloy steel).
• An alloy steel output shaft is supported by two deep groove ball bearings for enhanced rigidity.
• The center ring is made of alloy steel with an accurately machined integral ring gear.
• Planet gears are hardened, ground, and rotate on needle bearings with large hardened shafts.
• The input pinion is supported in a ball bearing for rigidity, not cantilevered.
• Input coupling has two opposing screws for secure connection to the servo motor shaft.
• The motor-input housing is anodized aluminum with a lubrication seal.
• Precision backlash is 1 arc-min max for one stage, with 5/6 arc-min as standard.
• Custom gearboxes with special ratios are available upon request.

The document provides detailed mechanical dimensions for various gearbox models (GNP40, GNP60, GNP90, GNP120, GNP150) with specifications for keyway, standard dimensions, and motor side dimensions. Drawings are available in PDF & STEP format upon request.

• Performance: Nominal output torque varies by model and stage, with ratios ranging from 3 to 100.
• Max Acceleration Torque: 3 times the nominal output torque.
• Emergency Stop Torque: 3.4 times the nominal output torque.
• Permissible Input Speed: Up to 3000 rpm for all models.
• Standard Backlash: Varies by model and stage, with low backlash options available.
• Max Radial and Axial Forces: Specified for each model.
• Rated Life: Over 10,000 hours.
• Operating Temperature Range: -10℃ to +40℃ ambient, with a max operating case temperature of 90℃.
• Noise Level: Ranges from 62 to 70 dB(A) depending on the model and stage.
• Lubrication: Gearboxes are lubricated for life with synthetic grease.
• Protection Class: IP54.
• Efficiency: 95% for one stage and 90% for two stages.
• Weight and Inertia: Detailed for each model and stage.
• No-load Running Torque: Specified for each model and stage.

• Stage 3 ratios can reach up to 1000:1 upon request.
• For input speeds above 3000 rpm, consultation is required.
• Low backlash options reduce permissible input speed.