Needle breakage is the most frequent and disruptive problem in circular knitting production worldwide. A single broken needle can cause machine downtime, fabric defects, and costly production delays. In this guide, we break down the 10 most common causes of needle breakage and provide actionable solutions to fix them permanently.
Problem: Without proper lubrication, friction between needles, sinkers and cams increases dramatically, leading to premature wear and sudden breakage. Over-lubrication is also harmful, as it causes oil buildup and fabric stains.
Solution: Upgrade to an automatic lubrication system for precise, consistent oil delivery.
Problem: Cheap imitation needles are made from inferior steel with poor heat treatment. They bend easily, break frequently, and can damage your needle cylinder.
Solution: Always use genuine, high-quality knitting needles from reputable manufacturers.
Problem: Cams with worn grooves or sharp edges create excessive stress on needles as they move up and down. This causes uneven wear and repeated breakage in the same position.
Solution: Inspect cams regularly and replace worn parts immediately.
Problem: Yarn with knots, slubs, foreign particles or inconsistent thickness will snap needles when passing through the needle hook. Abrasive yarns also accelerate needle wear.
Solution: Use high-quality yarn and install proper yarn cleaning systems.
Problem: Too much tension pulls the needle hook forward, causing it to bend or break during the knitting cycle. This is especially common with elastic yarns like spandex.
Solution: Adjust yarn tension to the correct level for your yarn type and machine gauge.
Problem: An unlevel machine causes uneven pressure on needles and sinkers, leading to premature wear and breakage on one side of the cylinder.
Solution: Check and adjust machine level regularly using a precision level.
Problem: Worn sinkers create gaps that allow needles to bend or catch during the knitting cycle. Damaged sinker edges can also cut or break needles.
Solution: Replace worn sinkers in complete sets to ensure uniform performance.
Problem: A bent or worn needle cylinder causes needles to sit at incorrect angles, leading to collisions with sinkers or cams. This results in frequent, random needle breakage.
Solution: Have your cylinder professionally repaired or replaced if damaged.
Problem: Running your machine faster than its designed rating increases stress on all moving parts, including needles. This leads to fatigue failure and sudden breakage.
Solution: Operate your machine within the recommended speed range for your fabric type.
Problem: Small metal fragments, lint buildup, or broken needle pieces can get caught in the knitting zone, causing catastrophic needle breakage.
Solution: Perform regular machine cleaning and inspections.
| Breakage Pattern | Most Likely Cause |
|---|---|
| Random breakage across entire cylinder | Lubrication problem, low-quality needles |
| Breakage in the same position repeatedly | Worn cam, damaged cylinder groove |
| Breakage on one side of the cylinder | Unlevel machine, worn sinkers |
| Breakage only with specific yarn | Yarn defects, incorrect tension |
| Sudden mass breakage | Foreign object in knitting zone |
Qattex is a professional manufacturer and supplier of circular knitting machine spare parts with over 30 years of industry experience. We supply high-quality needles, sinkers, cams, lubrication systems and more to knitting mills worldwide.
Most needle breakage problems are preventable with proper maintenance and high-quality spare parts. By identifying the root cause of breakage and implementing the solutions in this guide, you can significantly reduce downtime, improve fabric quality, and lower your production costs.
If you are experiencing persistent needle breakage issues, contact our technical team today for a free consultation. We can help you diagnose the problem and provide the right parts and solutions for your machine.
