Check cap placement
The cap must arrive square to the neck before tightening. Poor placement can cause the thread to start incorrectly.
Troubleshooting guide
Reducing cross-threading in screw capping
Cross-threading creates rejects, leaks and rework. The cause may be the closure, bottle, cap presentation, torque setup or bottle control through the capping station.
Check bottle control
Bottles that rock, twist or stall during tightening can create inconsistent torque and thread engagement.
Check closure quality
Caps with inconsistent moulding, poor threads or damaged liners can create problems even when the machine is set correctly.
Shortlist route
Which capping route fits?
Use this as a starting point before sending bottle, cap and output details for a project-specific recommendation.
| Requirement | Likely route | Why it matters |
|---|---|---|
| Cap starts at an angle | Placement review | Check cap orientation and hand-off to the bottle neck. |
| Bottle spins or tips | Bottle handling review | Use side belts, guides or tooling to stabilise the container. |
| Torque varies | Capper setup review | Check spindle pressure, speed, closure and bottle variation. |
FAQ
Questions buyers ask
Can a machine eliminate cross-threading?
A correct machine setup can reduce the risk, but bottle and cap quality also matter.
Is cross-threading worse with trigger sprayers?
Trigger sprayers can be more complex because dip tubes and closure orientation add handling challenges.
What evidence should I send?
Send photos, videos, samples, reject examples and your current capping speed.
Ready to shortlist?
Send the bottle, cap and target output.
Lancing UK will help identify whether you need a semi-automatic capper, compact capper, inline spindle capper or specialist cap feeding route.