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4 mm Pellet Press Die Set

4 mm Pellet Press Die Set

Regular price
$215.00
Sale price
$215.00

Pellet Die set for making 4 mm (~0.16 inch) pellets from powders.

Free fast shipping across USA and Canada

Die Set includes: Die sleeve, plunger rod, 2 x spacers, release ring and base plate.

This is the smallest die we stock. At such small diameters, you need such a small force (around 100 lb!) for very high stresses on the powder. We do not suggest using with a hydraulic press which does not have an accurate read out for low forces. Do not use this die with a big, heavy press - you can easily exceed the yield stress of the steel. You can even push down hard with your hand or tap it with a mallet to create sufficient force for compaction. 

Die made of hardened tool steel (Rockwell hardness >C60) for long lasting trouble free performance. 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.


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

Yield Strength Hardened Steel 80,000 psi (550 MPa)
Recommended max loading @ 50 % 40,000 psi (275 MPa)
Recommended max force 779 lb (0.4 ton, 3.4 kN)
Typical force for quality pellets 95-290 lb (0.05-0.15 ton)
Die sleeve inner diameter 4 mm (0.157 inch)
Die sleeve height 40 mm (1.57 inch)
Die sleeve outer diameter 45 mm (1.77 inch)
Assembled height with spacers (w/o powder)* 89 mm (3.5 inch)
Assembled height no spacers (w/o powder)* 73 mm (2.87 inch)

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