Best Pug Mills for Clay Recycling & De-Airing in 2026

Every potter throws away clay. Trimmings, failed pieces, dried-out clay at the bottom of buckets — it adds up fast. Most potters either buy new clay to replace it or haul scraps to the dump. But there’s a third option: a pug mill that recycles and de-airs your scrap clay back into workable material.

A quality pug mill doesn’t just save you money on clay costs — it also eliminates the need for hand-wedging, which can cause wrist and shoulder strain over time. This guide walks you through the key decision points and matches you to the right machine for your studio.

Understanding the Three Types of Machines

1. Clay Mixers (No De-Airing)

A clay mixer blends dry or slurry clay into uniform consistency. It’s useful for making your own clay bodies from raw materials or combining clay scraps into a consistent batch. But the clay comes out the same way it went in — if it had air bubbles, it still has them.

Best for: Potters who want to mix custom clay bodies or combine clay types, but who don’t mind hand-wedging afterward.

2. Pug Mills (With De-Airing)

A pug mill takes the mixer one step further by incorporating de-airing technology. Peter Pugger’s patented vacuum de-airing technology evacuates the complete processing chamber during the mixing cycle, guaranteeing de-aired clay once the vacuum gauge reaches the desired level — with no clogging, jamming, or vacuum port blockage issues.

Shimpo pug mills use a similar approach with their own proven de-airing systems. The result: clay that’s ready to throw without additional wedging.

Best for: Production potters, schools, and serious hobby studios where time-saving and avoiding repetitive strain matter.

3. Combination Mixer/Pug Mills

These machines do both mixing and pugging in a single unit, often with options for stainless steel construction (better for light-colored clays) or standard construction.

Best for: Studios that both mix custom clay bodies AND recycle scraps regularly.

The Critical Decision: Single-Phase vs. Three-Phase Power

Before shopping, check your studio’s electrical service.

Single-phase (120V or 240V residential): Standard household electrical service. Most home studios and small ceramic studios have this. Peter Pugger’s compact models like the VPM-20SS 120V and VPM-20 120V are single-phase.

Three-phase (commercial/industrial): Schools, large production studios, and commercial ceramic operations typically have this. It allows for larger, more powerful machines. Peter Pugger models like the VPM-30 and VPM-60 are available in three-phase at no additional cost.

Pug Mills by Scale and Purpose

Entry-Level: Compact Studio Models

For potters with limited space or moderate clay recycling needs, compact pug mills handle day-to-day scrap and produce ready-to-throw clay without major electrical upgrades.

The Peter Pugger VPM-20SS 120V is one of the most popular entry points — stainless steel construction (ideal for porcelain and white stonewares), 120V operation, and Peter Pugger’s proven vacuum de-airing. Slightly more affordable is the Peter Pugger VPM-20 120V, which delivers the same de-airing performance in standard (non-stainless) construction.

The Peter Pugger VPM-7SS 120V and Peter Pugger VPM-7 are even smaller, perfect for home studios with very limited space or occasional recycling.

For those who prefer Shimpo, the Shimpo Pug Mill NVA-04S is a compact de-airing model that’s widely used in schools and small studios. Currently discounted to $5,115 (from $6,115), it’s an exceptional value.

Mid-Range: Serious Hobby and Small Production

Once you’re recycling regularly and want faster throughput, mid-range models handle larger batches without requiring major studio infrastructure.

The Peter Pugger VPM-30 120V is a game-changer for potters who are serious about production — more capacity than the VPM-20, still operates on single-phase power, and maintains Peter Pugger’s vacuum de-airing reliability. If you need stainless construction and heated de-airing, the Peter Pugger VPM-30 TE (with thermal exchange) is worth the upgrade for studios working with very wet or very dry scrap.

The Shimpo Pug Mill NVS-07 (currently $5,115) is another excellent mid-range option — a professional-grade machine with consistent performance and strong support from the Shimpo brand.

Professional/Production Scale

For high-volume studios, schools, and production potters, larger machines handle daily heavy use and process clay faster.

The Peter Pugger VPM-60 240V is one of the most powerful single-auger models available, handling consistent daily production. The Peter Pugger VPM-60 TE adds thermal exchange heating for ultimate clay conditioning.

For maximum capacity, the Peter Pugger VPM-100 240V and Peter Pugger VPM-100 TE are the top of the Peter Pugger line — built for the highest volume and most demanding studios.

Mixing-Only Options (No De-Airing)

If you primarily mix custom clay bodies or combine clay types but don’t need de-airing, Peter Pugger’s mixer-only models like the PM-50 and PM-100 offer excellent value without the de-airing premium.

Stainless vs. Standard Construction

Potters working with light-colored clays — especially porcelain and white stonewares with soda spars — benefit from stainless steel construction. These models resist corrosion and discoloration, keeping your white clays truly white.

Standard (non-stainless) models like the VPM-20 and VPM-7 work perfectly fine for potters who fire earthenware, stoneware, or other darker clays.

Accessories and Stands

Don’t forget the Pug Mill Stand for VPM7, VPM9, VPM20 — it keeps your machine at a comfortable working height and makes clay removal much easier. At $399, it’s a worthwhile investment for any studio that will use the pug mill regularly.

The Math: Why Pug Mills Pay for Themselves

A quality pug mill is expensive upfront, but the math is compelling:

• Clay costs roughly $40–60 per 25 lb box
• A typical studio throws away 20–30% of clay as scrap
• Over a year, that’s hundreds of dollars in wasted material
• A mid-range pug mill like the VPM-30 ($6,205) pays for itself in 1–2 years in clay savings alone
• Add in the time saved by eliminating hand-wedging, and the payoff is even faster

Why Vacuum De-Airing Matters

Hand-wedging clay removes air bubbles but causes repetitive strain on your wrists, shoulders, and elbows — exactly the injuries potters need to avoid for a long career. A pug mill with de-airing does this work for you, automatically, while you do something else. For any potter firing regularly, this alone is worth the investment.

Ready to Choose?

Browse our complete pug mill and clay mixer collection to compare every model.