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Stainless steel die sets for ring-shaped pellet formation in catalysis, gas absorption & energy materials
Cell Lab Ring Shaped Dry Pellet Pressing Die Sets are designed to compress powders into uniform ring-shaped pellets, which provide unique structural and functional advantages compared to solid pellets. Manufactured from 440C stainless steel with hardness HRC60–62, these dies ensure durability, precision, and long service life under repeated high-pressure use.
Ring-shaped pellets are widely applied in catalysis, gas absorption, battery materials, ceramics, minerals, and pharmaceuticals, offering improved reactivity, surface area, and fluid dynamics compared to conventional solid pellets.
Ring-shaped pellet design — Enhances surface area and optimises gas/liquid flow for catalysis and absorption.
High-strength stainless steel — Built from 440C stainless steel with RC60–62 hardness.
Multiple cavity sizes — Available in 7–3 mm, 10–5 mm, and 20–10 mm (OD–ID).
Laboratory & industrial applications — Suitable for catalysts, energy materials, and pharmaceutical formulations.
Customisable solutions — Additional ring sizes available upon request.
| Product No. | Sample Size (OD–ID) | Cavity Depth (mm) | Die Material | Hardness (HRC) | Max Pressing Force | Dimensions (mm) | Weight |
|---|---|---|---|---|---|---|---|
| CL0653 | Φ7–3 mm | 40 | 440C Stainless Steel | HRC60–62 | 2.5 Tons | Φ53 × 120 | 2 kg |
| CL0654 | Φ10–5 mm | 40 | 440C Stainless Steel | HRC60–62 | 4 Tons | Φ53 × 120 | 2 kg |
| CL0655 | Φ20–10 mm | 40 | 440C Stainless Steel | HRC60–62 | 10 Tons | Φ53 × 120 | 2 kg |
Catalysis — Ring-shaped geometry increases active surface area for catalytic reactions.
Gas absorption & separation — Optimised pellet porosity and flow-through for improved absorption.
Battery materials — Preparation of ring electrodes and functional test samples.
Ceramics & minerals — Compaction of advanced materials into ring structures.
Pharmaceuticals — Novel drug release studies using ring-shaped compact pellets.
Q1: Why use a ring-shaped die instead of a cylindrical one?
Ring shapes provide higher surface-to-volume ratios and improved flow properties, ideal for catalysis and gas absorption.
Q2: What powders can be pressed with these dies?
They are suitable for ceramics, metallic powders, pharmaceutical formulations, catalysts, and mineral powders.
Q3: What pressing forces are required?
Depending on size: Φ7–3 mm up to 2.5 tons, Φ10–5 mm up to 4 tons, and Φ20–10 mm up to 10 tons.
Q4: Are custom ring sizes available?
Yes. Cell Lab offers customisation for different OD–ID specifications on request.
Q5: How should these dies be maintained?
Clean and dry after each use; apply light oil for rust prevention during long-term storage.


You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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