A spiral freezer belt is the metal conveyor belt that carries product through the tiers of a spiral freezer, for spiral freezing, rapid-freezing and continuous cooling lines. It has to suit the drum, drive and turn ratio of your system, not only the width.
Replacing a worn spiral belt, or building a new spiral freezer? Send photos, a sample or a drawing. Your belt is matched to your drum diameter, turn ratio, direction and drive — you approve a sample before production, and before it ships you see it turn on a drum matched to your drum diameter and turn ratio.
Ready for a price? What to send for a spiral freezer belt quote →
Not sure which spiral belt you have? Identify your spiral freezer belt type → Belt not running well? Is it the belt or the machine? →
Your turn ratio decides it. From 1.15, a standard two-row link belt fits; if your freezer turns tighter, you need a small radius three-row link belt, from 1.1. Not sure? Send your drum diameter and belt width.
1.15–2.5
turn ratio
2-row
links
300–2900 mm
11.81–114.17 in wide
from 1.1
turn ratio
3-row
links
300–1200 mm
11.81–47.24 in wide
Compare your old belt with these drawings. Rod pitch, belt width and edge type are enough to start — every value in mm and inches, confirmed on your project drawing.
Rod pitch
19.05–40 mm
0.750–1.575 in
Spiral pitch
5–23 mm
0.197–0.906 in
Wire diameter
1.2–1.8 mm
0.047–0.071 in
Belt width
300–2900 mm
11.81–114.17 in
| Drawing label | Reference (mm / in) |
|---|---|
| Material | SUS304 / SUS316 |
| Spiral pitch | 5–23 mm (0.197–0.906 in) |
| Wire diameter | 1.2–1.8 mm (0.047–0.071 in) |
| Rod pitch | 19.05 / 25.4 / 27 / 27.4 / 38.1 / 40 mm (0.750 / 1.000 / 1.063 / 1.079 / 1.500 / 1.575 in) |
| Rod diameter | 5.0 / 6.0 mm (0.197 / 0.236 in), or per project |
| Link height / thickness / width | Per project, measured from sample or drawing |
| Edge type | Button / flat-hat / rod / button cap welded, or clinched |
| O/A width | 300–2900 mm (11.81–114.17 in) |
| Turn ratio | 1.15–2.5, confirmed per project |
| Surface | Pickling / electropolishing |
Use the drawing to tell us which dimensions you can measure. Final values follow the confirmed project drawing.
| Drawing label | Reference (mm / in) |
|---|---|
| Material | SUS304 / SUS316 |
| Inner / middle pitch | 19.05 mm (0.750 in) or 27.4 mm (1.079 in) |
| Outer pitch | 27.4 mm (1.079 in) or 38.1 mm (1.500 in) |
| Spiral pitch | 5–23 mm (0.197–0.906 in) |
| Wire diameter | 1.2–1.8 mm (0.047–0.071 in) |
| Rod diameter | 5.0 mm (0.197 in) |
| Link widths / thickness | Per project, measured from sample or drawing |
| Edge type | Button / flat-hat / rod welded |
| O/A width | 300–1200 mm (11.81–47.24 in), custom widths |
| Turn ratio | From 1.1, confirmed per project |
Use the drawing to tell us which dimensions you can measure. Final values follow the confirmed project drawing.
SUS304
Used for most freezing and cooling lines.
SUS316
Considered where salt, brine, cleaning chemicals or corrosion are a concern.
Material documents
Prepared for the applicable order and confirmed before production.
Stainless steel SUS304 / SUS316 or plastic (nylon, UHMWPE, POM). Pitch, tooth profile, bore and keyway are confirmed against the drawing. Belt, sprocket and drum matching →
Measured a few dimensions? Send them for a spiral freezer belt review.
Same width and pitch is not enough. A spiral belt runs around your drum, so its turn ratio, drum diameter and sprockets are checked first — before you get a quotation.
RFQ data sheet
Drum diameter, belt width and turn ratio are enough to start; a drawing or the freezer nameplate also works. For a replacement, add the measured belt data and photos.
| Field | What to send | Unit / format | When needed |
|---|---|---|---|
| Drum diameter | Diameter of the spiral drum; say where it was measured | mm or in | Needed to start |
| Belt width | Edge to edge | mm or in | Needed to start |
| Turn ratio | If known; otherwise drum diameter and belt width | ratio | Needed to start |
| Freezer brand, model, original belt part number | As shown on the nameplate or old order | text | Helps the review |
| Belt length, tiers, single or bi-drum, up or down | Total length and number of tiers; drum layout and belt direction | m or ft; count | Helps the review |
| Spiral pitch, rod pitch, rod and wire diameter, edge | Caliper readings; rod pitch measured over ten pitches | mm or in | Needed for a replacement |
| Drive type; sprocket teeth, bore and wear | How the belt is driven and the sprocket details | count; mm or in | Needed for a replacement |
| Product, temperature range, cleaning method | What the belt carries and how the line runs | text; °C or °F | Helps the review |
| Photos, sample or drawing | Top view, both edges, rod ends and underside with a ruler or caliper; or a short sample; or the drawing | photo, sample or drawing | One of these for a replacement |
Reference values for each field are in the Spiral Freezer Belt technical specification. Send your drawing or old-belt photos on WhatsApp.
How to measure your old belt
Lay a short section flat
Put a piece of the old belt on a table, top side up. A section of a few rows is enough.
Measure with a caliper
Rod pitch over ten pitches, spiral pitch, wire diameter and rod diameter; belt width edge to edge. Note mm or inches.
Photograph it
Top view, both edges close up, the rod ends and the underside — plus each caliper reading, and the drum or nameplate if you can.
No old belt to hand? A drawing, the freezer nameplate or the drum diameter, belt width and turn ratio are enough to start.
Full photo and measurement guide →Send your old belt photo for a fit review
Attach photos, a drawing or the nameplate. An engineer replies with what fits, what is missing and the next step.
Four checks that matter to you: measured, sample approved, tested on your drum diameter and turn ratio, sprockets matched. You see photos and video before it ships.
Measured against your drawing
Spiral pitch, wire, rod and link dimensions — every reading compared with your old belt or drawing.
You approve a sample
The sample is laid out as a turn and checked against your turn ratio. No bulk production before your approval.
Drum and turn ratio tested
The belt turns on a test drum matched to your drum diameter and turn ratio; width, pitch and accessories are checked.
Sprockets checked with the belt
Teeth, bore and keyway checked against the drawing and packed with your belt.
Also checked: wire and rod traced by batch to your order (SUS304 / SUS316) · edge welds reviewed for fusion and burrs · photos and video sent before the crate is closed.
Rust, an uneven surface, cracked rod-end welds and burrs mean tracking trouble, hygiene findings and downtime on your line. Each one has a check before your belt ships.
ProblemRust spots on a rod
Discoloration and rust on a single cross rod in an otherwise clean belt.
✓ Rod material confirmed against your order; surface inspected before packing.
Seeing this on your belt? Send a photo →
ProblemBelt surface not flat
The belt waves instead of lying flat, which affects tracking and product support.
✓ Pitch and width measured along the belt; flatness checked on the test drum.
Seeing this on your belt? Send a photo →
ProblemCracks at the rod-end weld
Cracks or incomplete fusion at button-welded rod ends (arrows).
✓ Edge welds reviewed for full fusion; close-ups sent before shipment.
Seeing this on your belt? Send a photo →
ProblemWeld burr on a link
A sharp burr left at the weld point — a hygiene and contact-surface risk.
✓ Weld finishing and a burr review at the edge welding gate.
Seeing this on your belt? Send a photo →Project case · anonymized
Problem found
Small weld burrs on a running spiral belt became a hygiene and contact-surface concern.
Engineering review
Old belt photos, pitch, edge and weld areas reviewed together — where burrs appear under load.
Controlled replacement
Weld finishing, surface consistency checks and a burr review before delivery.
Your belt arrives with a shipping list your team can check on arrival, and the sprockets in the same crate. Real shipments; order numbers hidden.
Shipping list on the belt
Spiral and rod pitch, wire and rod diameter, width, length, edge and surface — check it on arrival.
Belt and sprockets together
Sprockets packed in the same crate as the belt they were checked with.
Belt sections in the crate
Laid flat and wrapped in the crate, with the shipping list on top.
Export crate
Closed after you have seen the photos and video.
Need a different width, edge, accessory, surface or sprocket?
Custom spiral belts are welcome — built to your equipment and application, with feasibility confirmed for your project. Send your drawing or old belt photos.
Yes. For a spiral belt freezer we review the replacement spiral belt together with the spiral freezer parts that touch it, such as sprockets. Spiral belt replacement without drawing starts from your old belt photos and measurements, and the drawing is confirmed with you before production.
Send photos of the old belt with a ruler or caliper, or a short section of it. Spiral pitch, rod pitch, rod and wire diameter, link and edge type are measured, checked against your drum diameter, turn ratio, direction and drive, and a sample is confirmed by you before production.
Freezer brand and model, belt width and length, drum (cage) diameter, turn ratio, single or bi-drum, ascending or descending, drive and sprocket details, product and temperature range, plus photos or a drawing. Photos support an indicative quotation; a formal quotation follows a confirmed drawing or specification.
Turn ratio describes how tightly the belt turns around your drum relative to its width. A belt with the wrong turn ratio will not turn correctly on your drum, even if width and pitch are the same. Reference projects range from 1.15 to 2.5 for standard two-row link belts, and from 1.1 for small radius three-row link belts — always confirmed against your drum and belt width.
When the freezer layout needs a tighter turn than a standard belt allows. Small radius belts use a shorter inner and middle pitch with a longer outer pitch, for example 19.05 × 27.4 mm (0.750 × 1.079 in) or 27.4 × 38.1 mm (1.079 × 1.500 in).
Common causes are a mismatch with the drum diameter, turn ratio, direction or sprockets, edge wear, and pitch elongation over time. The first step is to separate belt problems from system problems using photos, measurements and a short running video.
SUS304 suits most freezing and cooling lines. SUS316 is considered where salt, brine, cleaning chemicals or corrosion are a concern, for example in seafood processing. The material is confirmed per project.
Button welded, flat-hat welded, rod welded, button cap welded or clinched. The edge has to match how the belt contacts your drum, guides and product; matching the existing edge is the usual starting point for a replacement.
Not always. Your existing sprockets are checked first for wear, tooth count and bore. If they need replacing, stainless steel or plastic sprockets are supplied with the belt, confirmed against the drawing and checked with the belt before packing.
Dimensions are measured against the confirmed drawing, the belt is turned on a test drum matched to your drum diameter and turn ratio, edge welds and burrs are reviewed, and inspection photos and video are shared with you before the crate is closed.
Lay a short section flat and send a top view, both edges close up, the rod ends and the underside, plus caliper readings of rod pitch over ten pitches, spiral pitch, wire and rod diameter. A photo of the freezer nameplate or drum helps. Measurements in mm or inches are both fine.
An engineer identifies the belt and checks it against your drum diameter, turn ratio, direction and sprockets. You get a reply with what fits, what is still missing and the next step. A drawing follows for your confirmation, and a sample or trial length where the project needs it.
They depend on the belt and the project, and are confirmed in writing in the quotation.
Evidence
Real JBL projects with this belt type — measured, sampled, tested and shipped — and videos of the belts running or checked before shipment.
Malaysia · 2026
Small radius spiral belt replacement in Malaysia — trial run approved from photos, turn-tested, then about 130 m bulk
2026
Spiral belt and sprockets for a waffle cooling spiral — reverse engineered from the customer's belt
Australia · Melbourne · 2023–2024
400 m spiral cooling belt, made from the customer's sample
▶ 24sSpiral Freezer Belt Running in a Spiral Tower
▶ 22sSpiral Belt Trial Run Walkthrough — Shown to the Buyer Before Bulk
▶ 18sSprockets Running on the Bulk Spiral Belt Before Shipment
▶ 5sNylon Sprocket Running Match Test on a Spiral Cooling Belt
Have a similar belt? Send your old belt photo for a fit review.
Send Old Belt Photo →