Worm Gear W0.4-3.5-5 for 1.5 mm Shafts (Fine-Pitch Drive)

The metal worm gear W0.4-3.5-5 is designed for fine-pitch drives with 1.5 mm shafts in model railway applications. It transmits the motor torque reliably to the mating gear and is suitable for repairs, conversions and custom drives for locomotives and vehicles.

Dimensions:

• Module: 0.4
• Bore (inner diameter): 1.5 mm (tolerance +0.05 mm, −0 mm)
• Outer diameter: 3.5 mm
• Length: 5.0 mm

The precision-machined bore allows a play-free fit on shafts with 1.5 mm diameter. The outer diameter of 3.5 mm and the length of 5.0 mm make the worm gear suitable for gearboxes with limited installation space.

Properties and benefits of the worm gear:

• fine 0.4 module tooth profile for smooth, even running
• compact dimensions (3.5 × 5.0 mm) for tight installation spaces
• suitable for repairs, conversions and custom drives in model railway applications
• enables precise, low-vibration power transmission between motor and drivetrain

Together with a suitable mating gear, the worm gear ensures quiet and precise power transfer from the motor to the drivetrain.

Handling notes:

• Always push the worm gear straight onto the shaft without excessive force to avoid damaging the bore.
• Deburr the shaft ends slightly if necessary so the worm can be pushed on cleanly.
• Align the worm carefully to achieve the lowest possible runout.
• Secure the connection to the shaft with a fast-curing metal adhesive to reliably prevent twisting or slipping.