Engineering · 9 min read
How Do You Choose the Side Plate Height on a Self-Stacking Belt?
Written bySpringSales Director, JBL Mesh Belt · 16 years in metal conveyor beltsProjects in United Kingdom · USA · Australia · Brazil · South Korea · Spain · MalaysiaPublished 
Your new product is taller than the old one. Or your replacement belt stacks unevenly. Both problems start at the same part: the side plate.
Short answer
Side plate height sets the tier height of a self-stacking belt. Your maximum product clearance is the tier height minus the belt clearance. On a replacement, I measure the height on your original, match it, and check it again on the sample and the bulk belt.
At a Glance
| Question | What decides it | Where it is confirmed |
|---|---|---|
| Tier height | Side plate height | Your original or the drawing |
| Maximum product clearance | Tier height minus belt clearance | Before quoting |
| Standard or heavy duty | Product load and your freezer | Per project |
| Running direction | CW or CCW of your freezer | At inquiry, marked on the drawing |
| Side plate thickness | Reference 1.5 mm | Caliper on sample and bulk belt |
I have matched side plates for self-stacking freezers in the UK and Brazil. Below is how I decide the height, what I measure, and what goes wrong when it is off.
01What does side plate height actually decide?
In a self-stacking freezer, no drum cage holds each tier. The belt carries the tier above on its own side plates.
Short answer
Side plate height sets the tier height. Tier height minus the belt clearance gives the maximum product clearance — the tallest product the belt can carry. Together with your freezer height, it also sets how many tiers fit.
| Term | Meaning | Why you care |
|---|---|---|
| Side plate height | Height of the plate on each belt edge | Sets the tier height |
| Tier height (vertical pitch) | Height of one tier in the stack | Sets how many tiers fit |
| Belt clearance | Space taken by the belt itself | Comes off your usable height |
| Maximum product clearance | Tier height minus belt clearance | Tallest product you can run |
Each tier sits on the side plates of the tier below. So the side plate is the spacer, the load path and the guide, all in one part.
When a buyer tells me they are changing product, my first question is clearance. A taller product needs a taller tier. A taller tier needs a taller side plate. On an existing freezer, that is a machine question, not only a belt question.
Replacement or new freezer?
On a replacement, the height is already fixed by your freezer. I do not choose it — I copy it from your original or your drawing. On a new freezer, the height follows from the tier height the equipment builder needs for the product.
Either way, I also confirm running direction (CW or CCW) and turn ratio at inquiry. A belt made for the wrong direction will not stack or run correctly, however good the side plates are.
02Which side plate heights are common?
Most projects use a small set of heights. Product height and load decide which one.
Short answer
Our reference projects use 60, 80, 90, 100 and 120 mm side plates on standard belts, and 80, 100 and 150 mm on heavy duty belts, with 1.5 mm plate thickness. Your freezer decides the final value.
| Style | Rod | Side plate heights (reference) | Typical reason |
|---|---|---|---|
| Standard | 5.0 mm | 60 · 80 · 90 · 100 · 120 mm | Normal product loads |
| Heavy duty | 6.0 or 7.0 mm | 80 · 100 · 150 mm | Heavier loads; reinforcement pieces where specified |
Reference values from past projects. Height, rod and thickness are confirmed per project on the drawing.
Heavy duty is not just a taller plate. The rod is thicker, and reinforcement pieces are added where the drawing calls for them. Turn ratio on standard belts is usually 1.6 or 1.7; on heavy duty belts it is confirmed per project.
If you are not sure which style your freezer runs, send me a photo of the side plates and the rod ends. The style is usually clear from the plate shape and rod size.
03How do you match the height on a replacement belt?
On a replacement, the height is not a choice. Your freezer already fixes it.
Short answer
I measure side plate height and thickness on your original with a caliper, make the sample to those values, then measure the sample and the bulk belt the same way. You see the readings side by side.
| Reading | Your original | Sample | Bulk belt |
|---|---|---|---|
| Side plate height | 59.68 mm | — | 60.03 mm |
| Side plate thickness | 1.44–1.50 mm | 1.50 mm | 1.52 mm |
| Rod | 4.99 mm | 5.01 mm | 5.00 mm |
| Rod pitch | 30.00 mm | 30.00 mm | 30.00 mm |
In the UK the customer sent a section of the original belt. There was no drawing. I read the side plate height at 59.68 mm and the thickness between 1.44 and 1.50 mm. The readings varied, so one reading is not enough.
We made the belt with a 60 × 1.5 mm side plate. The original readings sit just under that. The bulk belt measured 60.03 mm high and 1.52 mm thick. I show the buyer every reading, so the decision is visible.
In Brazil the original side plate was 80 mm high. We made the new belt with 80 × 1.5 mm side plates, then joined it to the customer's original to check the fit before the stacking test.
04What goes wrong when the height or the plate is off?
A plate that is a little high, low or bent does not show on one link. It shows in the stack.
Short answer
If side plates are too high, too low or bent, the tiers do not sit level. The stack can tilt, the tier above no longer sits correctly, and product can touch the tier above. A stacking test shows it before shipment.
| Problem | What you see on the line | How it is checked |
|---|---|---|
| Plate height off | Tiers not level; the stack tilts | Caliper on sample and bulk belt |
| Bent side plate | The tier above no longer sits on it | Visual check and stacking test |
| Rod end not seated or weld damaged | Plate works loose over time | Rod-end and weld check before packing |
| Rust at the weld | Contamination risk in a food zone | Weld finish check and pickling |
In Brazil the bulk belt was laid on a curve and stacked four tiers high before the crates were closed, to check that the side plates sit and turn correctly. In the UK the belt was stacked tier on tier before the 450 m went into production.
You can watch a full stacking test video on our video page.
05What should you send so the height is right the first time?
Most delays come from one missing number. Send these with your inquiry.
Short answer
Send side plate height and thickness from your original or drawing, tier height, your tallest product, drum diameter, turn ratio and running direction (CW or CCW). I list anything missing before I quote.
| Send | How | Why |
|---|---|---|
| Side plate height and thickness | Caliper photo on your original, or the drawing | Sets tier height |
| Tier height and number of tiers | Freezer manual or a measurement | Checks clearance |
| Tallest product | Height, packed if it runs packed | Sets the minimum clearance |
| Drum diameter and turn ratio | Drawing or measurement | The belt must turn like the original |
| Running direction | CW or CCW; a photo of the drive side | A wrong direction will not stack |
If you have a worn section, send it. A real section answers questions a photo cannot, such as how the rod ends sit in the plate.
Before shipment, the belt is turned on a test drum matched to your drum diameter and turn ratio, and stacking tested. You receive photos and video before the crates are closed.
Start with our self-stacking belt page, or read how to take useful measurement photos of an old belt. For a full copy without a drawing, see how I replace an OEM self-stacking belt.
When This Is Not the Right Choice
- ✕If you want a taller tier on an existing freezer, that is a machine change — talk to the equipment builder first; a new belt alone cannot fix it.
- ✕Drum spirals do not carry tiers on side plates, so side plate height does not apply there.
- ✕If you only have a photo with no caliper in it, I cannot confirm the height — I will ask for a reading or a section.
From My Engineering Experience
On a self-stacking belt the side plate is the part I measure most carefully. It is the spacer, the load path and the guide in one piece.
Original plates can read under the design size. In the UK the original read 59.68 mm; we made the belt to a 60 mm plate, and the bulk belt measured 60.03 mm. The buyer saw all three numbers.
I would rather ask one more question before quoting than explain a stack that tilts after installation.
— Spring, Sales Director, JBL Mesh Belt
Evidence From Our Work
United Kingdom, 2026 — self-stacking belt, OEM replacement →
| Step | Detail |
|---|---|
| Side plate height | 59.68 mm original → 60.03 mm bulk |
| Side plate thickness | 1.44–1.50 mm original → 1.52 mm bulk |
| Tests | Turning test and stacking test before 450 m bulk |
Brazil, 2025 — self-stacking belt for meat freezing →
| Step | Detail |
|---|---|
| Side plate | 80 × 1.5 mm |
| Fit check | New belt joined to the customer's original |
| Test | Four tiers stacked on a curve; about 50 m run on the freezer |
FAQ
Q1What side plate height do I need?
On a replacement, the same height as your original, confirmed with a caliper. On a new freezer, it follows from the tier height and your tallest product.
Q2What is the difference between tier height and product clearance?
Tier height is the height of one tier, set by the side plate. Maximum product clearance is the tier height minus the belt clearance.
Q3Is 1.5 mm side plate thickness standard?
It is the reference thickness in our projects. The final thickness is confirmed on your drawing or your original.
Q4When do I need a heavy duty self-stacking belt?
When the product load needs it. Heavy duty uses 6.0 or 7.0 mm rods and reinforcement pieces where specified; the choice is confirmed per project.
Q5Can I check the height before bulk production?
Yes. The sample is measured with the same caliper as your original, and you approve the sample before bulk production.
Conclusion
Side plate height is your tier height. Measure it on the original, see it on the sample and the bulk belt, and see the stacking test before shipment.
Download the Self-Stacking Belt Technical Specification (PDF)
Specification ranges and options in mm and inch. Enter your work email and the file downloads right away.
References
Your contact for this belt
Spring · Sales Director, JBL Mesh Belt · 16 years
“Your belt is worn, the OEM price is high, and there is no drawing. That is where I start.”
Send me a worn section, a few photos with a caliper in the picture, or a drawing. I tell you what fits, what is missing, and show you a sample measured against your own belt before you pay for the full length. Buyers in the UK, the USA, Australia, Brazil, South Korea, Spain and Malaysia have replaced belts this way.
- ✓Readings on your original next to readings on our sample
- ✓Nothing in bulk until you approve the sample
- ✓Turning, stacking or sprocket tests before your belt ships
- ✓A reply from me, usually within 8 hours
