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1/4 inch (6.35mm) Pellet Press Die Set
1/4 inch (6.35mm) Pellet Press Die Set
1/4 inch (6.35mm) Pellet Press Die Set
1/4 inch (6.35mm) Pellet Press Die Set
Die sleeve inner diameter
6.35 mm (1/4 inch)
Die sleeve outer diameter
45 mm (1.77 inches)
Typical force for quality pellets
220-660 lb (0.01-0.3 ton 1-3.2 kN)
Die sleeve height 40 mm (1.57 inches)
Assembled height with spacers (w/o powder)* 89 mm (3.5 inch)
Assembled height no spacers (w/o powder)* 73 mm (2.87 inch)
Typical max pellet length**
15 mm (0.6 inch)
Yield Strength Hardened Steel 80,000 psi (550 MPa)
Recommended max loading (@ 50%) 40,000 psi (275 MPa)
Recommended max force
1755 lb (0.88 ton, 7800 N)
Typical force for quality pellets
220-660 lb (0.01-0.3 ton 1-3.2 kN)

*If making thicker pellets, the die set can operate just the same without spacers.

**Pending on the material you are pressing with and the method of loading the die set.

1/4 inch (6.35mm) Pellet Press Die Set

Pellet Press Die Sets
Regular price
Sale price

Pellet Die set for making 1/4 inch (6.35mm) pellets from powders. 

With your die set order we’ll include:

  • Die sleeve
  • Plunger rod
  • 2 x spacers
  • Base plate
  • Aluminium release ring¬†with¬†cutout for viewing pellet during release¬†

Shipping: Free fast shipping across USA and Canada 

Material: hardened D2 tool steel (Rockwell hardness >C60) polished to a high tolerance fit.

  • Worldwide shipping, Free to North America

  • Precision Made, Individually Inspected

  • High Strength Heat Treated Steel

1/4 inch (6.35mm) Pellets Dies have a range of applications. The 1/4 inch Pellet Dies require a relatively small amount of material to make a pellet compared to the larger diameter dies. 1/4 inch pellet dies are also commonly used for making KBr pellets for FTIR analysis, in which small quantities of powders are mixed with Infrared-transparent KBr (Potassium Bromide) powder before pressing into a pellet and transferring into the FTIR.

1/4 inch die sets require relatively small loads to apply huge stresses so always make sure you stay safe and stay below the max loading force of the pellet die set. Higher compressive stresses to not necessarily make better pellets. With the application of a few tons you can reach 100 000 psi within the die. Whilst dies steels are chosen for tolerating high stresses and pellet dies are heat teated fro superior properties, you can easily exceed even these high yield strengths with a hydraulic press with a few pumps of the handle. The diameter is small enough that pressing force can be applied manually with a lever press or arbor press. Take is easy and make sure students and interns are aware of the same!

This die is made of hardened D2 tool steel (Rockwell hardness >C60) for long lasting trouble free performance. The sleeve is polished to high tolerances to allow the hardened tool steel plunger to slide through perfectly. Plunger and spacers are made from high yield strength steel, machined and polished to high tolerance for the perfect fit. Interior surfaces ground to mirror-like finish.

Video is of the 6mm Pellet Press Die Set. The 1/4 inch is identical to this (with a 1/4 inch inner diameter). 

For an animation of die assembly, powder pressing and release click here.


  • Always wear googles and safety protection equipment
  • Clean well after use to prevent rusting.
  • Do not apply pressure beyond shown on table.
  • See our tips for making perfect pellets here.