JACK 781 for Industrial Sewing Machines

The Jack 780 and 781 are electronic buttonhole machines, and the 781D and 781E variants are common on Indian shirting and trouser lines. Buttonholing is a sequence of precisely timed movements, so the parts that fail are as often electronic as mechanical: encoders, sensors and boards alongside link sets, timing gears, bobbin winders, counter weights and bracket guides.

Jintex stocks Jack 780/781 spare parts covering the 781D and 781E, available from our Bangalore, Ahmedabad and Noida branches — genuine Jack and inspected OEM-compatible options, clearly labelled so you know exactly what you're ordering. Encoders, sensors and link sets are the fastest-moving items and are usually in stock.

Jack numbers these parts in the 40-series format (4023800200, 4023101300) with electronic parts in the 8-series (810343, 809289) — search the number above to go straight to the part. If the machine is throwing an error rather than a broken part, send us the error code on WhatsApp and our team will tell you which board or sensor it points to. We supply single pieces and bulk quantities, with no minimum order.

Can't find a specific Jack 781 part in the catalogue? We source hard-to-find buttonhole spares and repair 781 boards — send us the requirement and we'll get back to you with a quote within 24 hours.