Side belts
Common on inline spindle cappers to keep bottles steady during tightening.
Bottle handling
Bottle stability and guiding for capping machines
Bottle stability decides whether a capper can tighten caps repeatably at the target output.
Buyer intent
Good capping depends on controlling the bottle before the cap is tightened.
Lightweight, tall, narrow or flexible bottles can move under capping force. If the bottle twists, tilts or stalls, cap torque becomes inconsistent and cross-threading risk increases.
Side belts, star wheels, neck guides, rails and change parts can all be used to improve control. The right method depends on bottle shape, filled weight, conveyor speed and closure type.
Best-fit checks
- Check the bottle empty and filled.
- Identify the narrowest and tallest bottle in the range.
- Consider whether labels or container shape affect grip.
- Plan guide changeovers for multiple formats.
Specification checks
Bottle stability checks
These details help decide what guides or belts are needed.
| Question | Why it matters | What to send |
|---|---|---|
| Filled weight | A filled bottle often behaves differently from an empty sample. | Filled and empty bottle samples. |
| Contact surfaces | Labels, ribs and tapered shapes can affect side-belt grip. | Photos and physical samples. |
| Bottle height | Tall bottles may need higher guides or side support. | Bottle height and centre of gravity concerns. |
| Format range | Multiple bottles may need change parts or adjustable guides. | Smallest and largest expected bottle formats. |
Decision points
Handling options
Guide rails
Help keep the bottle centred through the capping station.
Change parts
Useful when product ranges have very different bottle shapes.
Related pages
Move to the right capping route
FAQ
Capping machine questions
Why does my bottle spin during capping?
The bottle may not be gripped firmly enough, or the capping torque may exceed available bottle control.
Do empty samples prove the capper will work?
Not always. Filled weight and product distribution can change handling.
Can shaped bottles be capped automatically?
Often yes, but they may need extra guiding or a different capping route.
What should I send for handling advice?
Send empty and filled samples, dimensions, labels if fitted and the target output.
Ready to shortlist?
Send the bottle, cap and target output.
Lancing UK will help identify the most practical capping route and quote the right machinery scope.