Spiral Freezer Belt QC Points Buyers Should Check Before Shipment
Short answer
Ask for five things before a spiral freezer belt ships: wire and rod readings, link and pitch readings over several pitches, every edge weld checked, overall width at several points, and a drum-diameter test matched to your drum and turn ratio — with photos and video.
01Wire, rod and spiral readings
Spiral wire, rod diameter and spiral outer diameter are measured with a caliper before the belt is assembled. One off-size part changes the pitch of the whole row.
02Link, pitch and width
Link height and thickness, rod pitch and overall width are measured on the finished belt — pitch over several pitches so small errors show up.
03Welds and burrs
Edge welds are checked one by one for full fusion; burrs on links are removed, because they catch product and wear the drum.
04Drum-diameter test
The belt is run on a test drum matched to your drum diameter and turn ratio. This is where a belt that will ride up or track off shows it — before it reaches your plant.
05What to ask your supplier for
- ✓Readings with the caliper in the photo, not only a report
- ✓A drum test photo or video at your drum diameter
- ✓Edge weld close-ups
- ✓Sprocket bore and fit, if sprockets are supplied
- ✓Packing photos before the crate is closed
06QC point, how it is checked and what you receive
| QC point | How it is checked | What you receive |
|---|---|---|
| Spiral wire and rod diameter | Caliper, before assembly | Photos with the caliper reading visible |
| Rod pitch and link pitch | Measured over several pitches | Readings and photos |
| Overall width | Tape at several points along the belt | Width photos |
| Edge welds and burrs | Each weld checked; burrs removed | Weld close-ups |
| Turn on the drum | Test drum matched to your drum diameter and turn ratio | Drum test photos or video |
| Packing | Before the crate is closed | Packing and crate photos |
Want this checked on your belt?
Send photos with a tape in the picture, a drawing or an old belt section.
Questions Buyers Ask
Q1Is every spiral belt tested on a drum?
Spiral and self-stacking belts are checked on a drum matched to your drum diameter and turn ratio; the photos and video are sent before shipment.
Q2Can I get the readings before shipment?
Yes — readings with photos, weld close-ups and the drum test are shared before the crate is closed.
Q3Who sets the QC checkpoints?
JBL sets them from your confirmed drawing and confirms them with the production resources for your order.
Q4What if a reading is outside the drawing?
The section is corrected or rejected before packing, and the new reading is shared with you.
Q5Can the QC points follow our own checklist?
Yes. Send your checklist with the drawing; the points are agreed before production.