Replacement Shuttle Hook Tension Spring – Singer Part # 8611 – Fits 29K & 29U Cobbler Machines

Description

This replacement shuttle hook tension spring (Part # 8611) is a new aftermarket component for Singer 29K and 29U industrial shoe patcher (cobbler) machines. A small, flexible metal plate that sits on the outside of the shuttle hook and regulates bobbin thread tension as it exits the bobbin for balanced stitch formation on leather and heavy materials.

Part #: 8611
Material: Metal
Condition: New
Type: Replacement (aftermarket)

When to Replace

Replace when you notice loose or skipped stitches, thread breakage, a visible wear groove on the spring, or loss of spring tension. Thread slides against this spring continuously during sewing it is a standard maintenance item.

Related Parts

Regulating Screw Part # 662 (adjust after installing new spring)
Shuttle Hook Part # 8603 (small bobbin)

Compatible Singer Models

29-1, 29K71, 29K73, 29K171, 29K171A, 29U171A, 29U173A

Important: Verify your model number and compare to the photos before ordering to confirm fitment.

Confirm part compatibility with your specific machine before ordering. Part numbers and photos are your best reference.