Singer 29K71 – Skipping Stitches / Thread Not Catching – Shuttle Carrier Play

[DmytroH]

Hello, masters and experts,

I recently got my first industrial sewing machine – a Singer 29K71. At first, it seemed to work perfectly, stitching reliably through different leather thicknesses. However, within just a few days, it started skipping stitches or not forming stitches at all, making the process of crafting products frustrating, to say the least.

Now, sometimes it sews perfectly, but even small actions – like lifting and lowering the presser foot – cause it to suddenly stop making stitches. The thread just slips through and doesn’t catch. At this point, I'm even afraid to breathe near it, not to mention changing the bobbin.

I’ve read a few forum threads and suspect that the issue might be due to at least play in the shuttle carrier (82177). You can see the movement in this video: YouTube Video

Could this clearance be the cause of the problem? If so, could you advise me on what to disassemble and check to take more detailed photos for investigation? Or is there something else I should inspect besides the Shuttle Driver Gear Box (82226) and driving pinion (82178)? Could the issue be even deeper?

I know that many people mention the small bobbin capacity as a downside of this machine, but for my initial learning in leather sewing, it’s more than enough before transitioning to more advanced and expensive machines. That said, I’d love to restore and bring this beautiful machine back to life.

Since this is my first machine, I truly appreciate any help and guidance. @Wizcrafts and @Constabulary, I’ve seen your insights on similar machines – would love to hear your thoughts!

Thanks in advance!

Edited 11 hours ago by DmytroH