The default coupler may bend the lead screw if not used properly, bended lead screw you won’t be getting good tall print. With flexible, it reduce stress between the stepper motor and the lead screw.
Shaft Usage: 5mm to 8mm
Material: Aluminum alloy; Size: 25x20mm
Feature: Spline shaft with coiling clamping; Main Color: Silver tone
Flexibility of coupling shaft removes stress between the motor and driving components.
The shaft couplers are widely applied to small CNC machines encoding and 3D printers Z shaft coupling, simplifies the debugging difficulty.
x Flexible Shaft Coupler 5x8mm OD 20mm L 25mm