If you work with leather, it’s bound to happen: the waxed thread frays, sticks too much, or even breaks prematurely.
It's no accident.
And the best part: It has a solution (and it's simpler than it looks).
In this guide, I'll explain the most common problems and how to avoid them to achieve clean, strong, and professional seams.
Why does waxed thread cause problems?
The waxed thread is designed to improve the strength, grip, and durability of the seam.
But when something goes wrong, it's usually because:
- Excess or lack of wax
- Bad combination with leather
- Misuse of needles or punctures
- Sewing technique
Remember: leather is a material with a natural fibrous structure that provides strength but also friction
Problem 1 – The thread frays
Why does it happen
- Badly made holes (tear the thread)
- Needles with burrs
- Low-quality thread
How to fix it
- USA Sharply sharpened punches
- Check needles before sewing
- Apply an extra light layer of wax
Tip: If the thread “squeaks”, there's too much friction.
Problem 2 – The thread sticks too much
Why does it happen
- Excess earwax
- High temperature (wax softens)
Solution
- Thread it through a dry cloth
- Works in a cool environment
- Use balanced quality thread
No more wax = better results
Problem 3 – The thread breaks
Why does it happen
- Excessive tension when sewing
- Holes too small
- Thread not suitable for leather thickness
Solution
- Adjust the punch size to the thread
- Don't force the stitch
- Use thread proportional to the thickness of the leather
Problem 4 – Uneven Seams
Why does it happen
- Irregular voltage
- Misaligned holes
- Different pressure on each stitch
Solution
- Score beforehand with a fork or wheel
- Keep a steady rhythm
- Practise the tension (key)
Key that almost nobody explains
The relationship between leather, tanning, and friction
Not all leathers behave the same:
- Vegetable-tanned leather usually generates more friction
- Chrome-tanned leather is more flexible and softer.
This is due to how tannins or minerals interact with the collagen of the leather during tanning
Result:
- More friction = more thread wear
- Greater smoothness = more fluid stitching
💡 Tip: adapt the thread according to the type of leather
How to choose waxed thread well (quick)
- Fine leather → fine thread (0.4 – 0.6 mm)
- Medium leather
- Thick leather → 0.8 – 1 mm or more
✔ Best polyester for strength
Best linen for a traditional aesthetic
Conclusion
The waxed thread doesn't fail.
What fails is how it's used.
If you control:
- friction
- the tension
- and the type of leather
Your seams change completely.
Looking for waxed thread that really works?
Discover our artisan-tested selection → https://artesanofactory.com/categoria/hilo-encerado-para-cuero/
