17220007 Rubber Ring Coupling for Jack F4/F5/F6 Machine

Part no. 17220007 rubber ring coupling for Jack F4, F5 and F6 direct-drive single needle lockstitch machines. It links the motor to the main shaft and absorbs small vibrations, so a worn or cracked ring shows up as slipping, noise or a machine that feels underpowered.

Fits

• Jack F4, F5, F6 direct-drive lockstitch machines
• Part no. 17220007

Signs the Coupling Is Worn

• Extra vibration or knocking from the motor area.
• The motor runs but the needle seems to lose power or lag.
• Visible cracks, flattening or crumbling on the rubber.

How to Replace the Coupling

1. First, switch off and unplug the machine.
2. Next, access the motor-to-shaft joint and remove the old rubber ring, noting its orientation.
3. Then fit the new ring in the same way.
4. Finally, turn the handwheel by hand to check it moves freely before powering on.

अक्सर पूछे जाने वाले प्रश्न

How long does a rubber coupling last?

There is no fixed life. It depends on how many hours the machine runs and how hard it works, so inspect it whenever you service the motor and replace it as soon as it cracks or flattens.

Is this the same as other single needle motor couplings?

Not always. Sizes differ between machine groups, so use the part number 17220007 and the model list above to match it.

More parts: जैक F4 F5 F6 स्पेयर पार्ट्स.