Curtain Pulley Assembly: Cord Path and Drag

How a curtain pulley line is specified

The pulley type (single wheel, double wheel or runner), the cord, and the load the pulley carries set the layout. A pulley that is judged by feel on a workbench needs a measurable drag figure on the line, or the judgement moves to the customer.

Station sequence

Housing feeding, wheel placement, axle pin pressing, hook or bracket fitting, then a free-rotation check under load. The pin press is the station that decides whether the pulley turns freely for the next ten years.

What decides feel and life

• Pin press depth: a pin pressed too far pinches the wheel, too little and the wheel walks out.
• Wheel free torque: state a maximum turning torque under a stated load.
• Hook alignment: a bracket 2 degrees off makes the cord rub the housing.
• Cord path: sharp edges anywhere on the path cut the cord before the pulley fails.

What we need from you

• Drawing of the housing, wheel and pin, with the fit tolerance
• Cord type and diameter, and the working load
• The drag figure you accept and how it is measured
• Output per shift and the number of variants

How the project runs

Quote from drawing, tooling design, build, then run-off with your own parts in our plant in Chashan. Machines are built to your samples and drawings, and the drawing set is agreed before metal is cut.

Send a drawing to [email protected] or call +86-18123647785 to start a quote. Related lines: car door lock assembly machines, toys gearbox assembly machines.