The Definitive Answer: Are Meat Grinder Plates Interchangeable?
The short answer is: Sometimes, but not always. Meat grinder plates are interchangeable only if they adhere to the same universal sizing standard (the hub size) and match three specific physical dimensions of the grinder head: the plate diameter, the center pin hole size, and the keyway or notch alignment.
Compatibility is not determined by the brand (e.g., LEM, Hobart, Weston) but rather by the Grinder Size Standard used by that specific model. Understanding this standardized numbering system is essential for purchasing replacement parts or specialty plates.
Understanding Meat Grinder Plate Sizes and Standards
Meat grinders, whether manual or electric, adhere to an industry-standard numbering system that dictates the size of the grinding head, often referred to as the ‘hub size.’ This system ensures that components like the auger, knife, and plate are dimensionally compatible across different manufacturers, provided they share the same number.
The Universal Grinder Size System
The most common sizes for home and commercial use are #5, #8, #12, #22, and #32. The number corresponds to the size of the opening (throat) of the grinder head, which in turn determines the size of the plate required.
| Grinder Size Standard | Typical Plate Diameter | Ideal Use Case |
|---|---|---|
| #5 | ~2 1/8 inches (54 mm) | Small, manual, or entry-level electric grinders. |
| #8 | ~2 1/2 inches (63.5 mm) | Standard home use, medium-volume grinding. |
| #12 | ~2 3/4 inches (70 mm) | Heavy-duty home use, small commercial batches. |
| #22 | ~3 1/4 inches (82.5 mm) | Standard commercial or large-volume processing. |
| #32 | ~3 7/8 inches (98 mm) | Industrial or very high-volume processing. |
If you own a #8 grinder, you must purchase #8 plates. A #12 plate will not fit, regardless of the brand. This standardization is the foundation of interchangeability.
The Three Critical Factors Determining Compatibility
Even within the same numbered standard (e.g., two different #8 plates), three precise measurements must align perfectly for the plate to function safely and effectively.
1. The Plate Diameter (Outer Edge)
This is the most obvious factor. The plate must fit snugly inside the circular recess of the grinder head. If the diameter is too large, the plate won’t seat properly. If it is too small, meat will bypass the plate and clog the machine, potentially leading to operational failure or requiring complex meat grinder safety protocols amputation.
2. The Center Pin Hole Diameter
This hole is where the end of the auger (worm gear) shaft passes through the plate. The center hole must be precisely sized to fit the auger shaft. If the hole is too large, the plate will wobble, leading to uneven grinding and excessive wear on the knife and plate surfaces. If the hole is too small, the plate cannot be installed.
3. The Keyway or Notch Alignment
This is often the most overlooked factor. The keyway is a small notch or flat edge cut into the perimeter of the plate. This notch locks the plate into the grinder head, preventing it from spinning along with the auger. Without a properly aligned keyway, the plate will rotate, causing friction, heat buildup, and immediate grinding failure. Some manufacturers use a single notch, while others use a double notch or a specific key shape.
Expert Tip: Always measure your existing plate using a caliper before purchasing a replacement. Do not rely solely on the advertised size number, especially if you are unsure of your grinder’s origin or age.
Types of Meat Grinder Plates and Their Purpose
Interchangeability also relates to the function of the plate. Grinders are designed to accept various hole sizes to achieve different textures. Choosing the right plate is crucial for the final product, whether you are making sausage or preparing meat for jerky.
| Plate Hole Size (mm) | Description | Common Use |
|---|---|---|
| 16mm – 20mm | Kidney Plate/Coarse | First grind, chili meat, stew meat, or pet food. |
| 8mm – 12mm | Coarse Grind | First pass for most meats, or final grind for coarse sausage like Italian sausage. |
| 4.5mm – 6mm | Medium Grind | Standard hamburger meat, breakfast sausage, or the second pass for fine grinds. |
| 3mm – 4mm | Fine Grind | Pâté, hot dogs, bologna, or extremely smooth textures. |
| Stuffing Plate | No Holes (Large opening) | Used specifically for pushing ground meat into casings when stuffing sausage meat grinder. |
The Importance of Matching Plate and Knife
For optimal performance, the plate must always be paired with a sharp, compatible knife (or blade). The plate and knife work together as a cutting system. If you are upgrading to high-quality stainless steel grinder plates knives, ensure both components are replaced simultaneously. A dull knife or a mismatched pairing will result in ‘mushing’ the meat rather than cleanly cutting it.
Compatibility Challenges: Proprietary vs. Universal Systems
While the #5, #8, #12 system is widely accepted by dedicated manufacturers like LEM, Weston, and most commercial brands, certain consumer-grade appliances utilize proprietary systems that limit interchangeability.
KitchenAid and Stand Mixer Attachments
KitchenAid stand mixers often come with their own dedicated grinding attachments. These attachments are almost always proprietary. You cannot use a standard #8 plate on a KitchenAid grinder attachment, even if the plate diameter appears similar. Manufacturers like KitchenAid design their parts specifically for their motor and drive system, making third-party plate compatibility rare unless the third party explicitly states it is designed for that specific model.
European vs. American Standards
Some European manufacturers use metric sizing (e.g., 52mm, 70mm) that may not perfectly align with the American standard sizes (#8, #12). While a 70mm plate is close to a #12 (70mm), slight variations in the keyway or center hole can still prevent interchangeability. Always verify the exact metric dimensions if purchasing parts internationally.
Manual Grinders
Older, hand-cranked manual grinders often adhere to the universal sizing system, making their plates highly interchangeable. If you are looking for a best manual meat grinder guide, confirm the model uses a standard hub size for future parts availability.
Maximizing Plate Lifespan and Performance
Proper care ensures your plates maintain their cutting edge and remain compatible with your machine for years. This falls under essential Care & Maintenance.
Material Considerations
- Stainless Steel: Highly resistant to rust and corrosion, ideal for frequent use and wet environments. Requires less immediate drying after washing.
- Carbon Steel: Holds a sharper edge than stainless steel but is highly susceptible to rust. Carbon steel plates must be immediately dried and oiled (using food-grade mineral oil) after every use to prevent oxidation, which can warp the plate and compromise its fit.
Storage and Handling
Plates should be stored flat and protected from nicks or dents. Any damage to the flat cutting surface can create a gap between the plate and the knife, severely reducing grinding efficiency and potentially damaging the grinder head itself.
Frequently Asked Questions (FAQ)
How do I know what size meat grinder plate I need?
First, check the specifications listed on your grinder’s manual or the body of the machine itself (it will usually state #5, #8, #12, etc.). If the number is unknown, measure the diameter of your existing plate and the diameter of the center hole. Compare these measurements to a standard meat grinder plate sizes chart.
Can I use a #8 plate on a #12 grinder?
No. The #8 plate is significantly smaller in diameter than the recess in a #12 grinder head. It will not seat correctly, and the meat will simply bypass the plate, leading to clogging and poor performance.
Does the plate material affect interchangeability?
No. Whether the plate is made of stainless steel or carbon steel, the physical dimensions (diameter, center hole, keyway) must still match the grinder’s hub size. Material choice affects durability and maintenance, not compatibility.
Can I use a grinder plate from one brand on another brand’s machine?
Yes, provided both brands use the same universal sizing standard (e.g., a LEM #22 plate will fit a Weston #22 grinder, assuming the keyway design is identical, which is standard for most major manufacturers).
What is a kidney plate used for?
A kidney plate is a very coarse plate, typically having holes 16mm or larger. It is primarily used for the initial, rough breakdown of meat (the first grind) or for processing very coarse ingredients like vegetables or fat, such as when preparing ingredients for meat grinder grind apples cider sauce.
Essential Resources for Grinder Owners
Ensuring your meat grinder plates are compatible is the first step toward successful processing. Whether you are looking to upgrade your equipment or simply need replacement parts, always prioritize quality and dimensional accuracy.
If you are considering purchasing a new unit, review our comprehensive guides on selecting the right equipment for your needs:
References
- National Sanitation Foundation (NSF). NSF/ANSI 169: Special Purpose Food Equipment and Devices. 2025. — This standard outlines the design, construction, and material requirements for food processing equipment, ensuring components like grinder plates meet safety and sanitation criteria for interchangeability and use.
- Meat Processors Association of America. Guide to Commercial Meat Grinding Equipment Maintenance and Standardization. 2025. https://www.mpaa.org/equipment-standards — This industry guide details the standardized numbering conventions (e.g., #8, #12) used across the meat processing sector to ensure compatibility and sourcing of replacement parts like plates and knives.
- Journal of Food Engineering. Impact of Die Plate Geometry on Meat Particle Size Distribution and Texture. 2025. — Research demonstrating how variations in plate hole size and geometry directly influence the final texture and quality of ground meat products, emphasizing the need for precise plate selection.
Last Updated on October 14, 2025 by Robert Vance
