Atlas® Evacuable Pellet Dies

Production of high quality sample pellets from 5mm to 40mm diameter.



Specac Atlas® Evacuable Pellet Dies

Specac manufactures a wide range of high-quality Atlas Series Evacuable Pellet Dies suitable for compacting powdered samples into discs or briquettes. These are particularly well suited for the preparation of solid KBr pellets for FT-IR molecular spectroscopic analysis and XRF pellets for X-Ray Fluorescence atomic spectroscopic analysis (as required by a number of USLP and ASTM methods), but also find use in a broad range of other applications. Atlas Series Evacuable Pellet Dies are typically used in conjunction with the Specac’s Atlas Series of Hydraulic Press Products.

These Evacuable Pellet Dies produce circular pellets in sizes from 5 mm to 40 mm diameter as standard, but other shapes and sizes are available on request. These pellet dies cover a range of load capabilities. For optimum quality and durability of the pellet die, all parts are manufactured from hardened stainless steel, and surfaces that come in contact with the sample are highly polished.

Each Pellet Die comprises of an evacuable base, body, plunger, a pair of internal pellet pressing surfaces, extractor ring, and O Ring Kit.
An evacuation port is provided for removal of moisture, if desired, during the pressing process.

Key features

  • Hardened steel components Manufactured from the highest quality hardened 440C Stainless Steel, they offer the best possible quality and durability available.
  • Diameters from 5 mm to 40 mm Suitable for FTIR (typically 13 mm) and XRF (32 and 40 mm) as well as other applications.
  • Mirror polished pressing surfaces To offer the highest possible quality of pressed sample.


The standard 5-part pellet dies consist of a base, a body, 2 pressing pellets between which the sample is pressed as well as a plunger. In addition, 2 O-rings are used to complete the die and enable superior performance. Dies are also supplied with an extractor cup or ring to enable easy removal of the sample. All dies 5 -20mm have an evacuation tube, the 32 and 40mm dies are available with or without an evacuation tube. Those which have an evacuation tube allow the fitting of a vacuum pump to be used to assist with the removal of moisture if desired during the pressing process. The 32 and 40mm dies available without an evacuation tube have an evacuation port to allow air to escape. As dies are subject to a load placed upon them, each has a maximum load rating which should not be exceeded.


5 mm Evacuable Pellet Die


10 mm Evacuable Pellet Die


13 mm Evacuable Pellet Die


20 mm Evacuable Pellet Die


32 mm Standard Die (No Evacuation Port)


32 mm Standard Die With Evacuation Port


32 mm Lightweight 3-piece Die


40 mm Lightweight 3-piece Die


40 mm Standard Die (No Evacuation Port)


40 mm Standard Die With Evacuation Port


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