Y34393 Looper for Yamato Overlock Machine

The Y34393 Looper is a genuine Yamato part — the lower/primary looper used on Yamato overlock sewing machines. It carries the looper thread and interlocks it with the needle thread beneath the fabric to form the overlock stitch. Best for garment factories and tailoring units running Yamato overlock machines where thread looping, skipped stitches or a worn looper tip are affecting stitch quality.

• Genuine Yamato part number Y34393 (lower/primary looper)
• Precision-shaped tip for reliable thread interlock at high speed
• Hardened surface resists wear from continuous production
• Smooth thread channel reduces friction and thread breakage
• Direct OEM fit — no adjustment needed beyond standard timing

Use Cases

• Replacing a worn or chipped looper tip causing skipped or loose stitches
• Fixing thread looping or breakage traced to a damaged looper
• Routine overhaul of a heavily used Yamato overlock line

Benefits

• Restores clean, consistent thread interlock for reliable overlock stitching
• Genuine-fit tolerance keeps looper timing accurate without extra adjustment
• A moderate-cost fix that resolves stitch-quality issues without a full head repair

Machine Compatibility

Specifications

How To Replace This Looper

1. First, switch off the machine and note the current looper thread routing.
2. Next, unthread the looper carefully before removing anything.
3. Then, remove the mounting screw and slide out the worn Y34393 looper.
4. After that, fit the replacement looper in the same position and secure the mounting screw.
5. Following this, check looper timing against the needle by hand-turning the machine slowly.
6. Finally, re-thread and run a test seam to confirm clean stitch formation before full production.

Frequently Asked Questions

How do I know the looper needs replacing?

Loose loops on the underside of the fabric, skipped stitches at speed, or a visibly chipped or bent looper tip when inspected closely are the usual signs. A worn looper often shows up as inconsistent stitch quality that gets worse as machine speed increases.

Does replacing the looper affect timing?

Looper timing can shift slightly with a replacement part, so it’s worth checking the looper-to-needle relationship by hand-turning the machine after fitting, rather than assuming it’s identical to the worn part removed.

Is this the upper or lower looper?

Y34393 is the lower/primary looper. If your machine also uses an upper looper (commonly Y34392 on the same models), check whether that one needs replacing too rather than assuming a single looper swap will fully resolve stitch issues.

Can a chipped looper tip be filed smooth instead of replaced?

Filing can temporarily smooth a small nick, but it changes the tip’s original geometry, which affects how cleanly it catches the needle thread. For reliable stitch quality, technicians generally recommend replacing rather than reshaping a damaged looper.

Does this ship with COD and pan-India delivery?

Yes, this looper ships pan-India with cash-on-delivery available on eligible orders, along with GST billing for business buyers.

You May Also Need

• Sewing machine loopers
• Yamato 3108134 Needle Plate
• 1.5 Red Screwdriver for Overlock Sewing Machine