The Polymer Systems / Amacoil 3274 Rotor Knife is a precision-ground rotor knife engineered as a drop-in OEM-spec replacement for Polymer Systems / Amacoil equipment. Manufactured to original-equipment tolerance and ground at our New England facility.

Specifications. Dimensions: 20.250 × 4.3121 × .120 in · Material: D2 · Bevel: RB 35/20 · Model: 3274 · No. H/S: 4H · Part No.: 63253 · Set Qty.: 12 · Product Type: Knife · Part #: 456-P3274. Material substitutions (M2, D2, A11, powder metal, tungsten carbide inlay) available on request — we’ll recommend the right steel based on your run hours and material hardness.

Polymer Systems and Amacoil bed and rotor knives are common on compounding and pellet finishing lines. Standard OEM-spec replacements ship from our New England shop with same-day pickup available.

Already have this blade? We’ll regrind it. Most plants save 40–60% by regrinding existing blades instead of buying new — and most OEM steels still have life left long after operators assume they don’t. Send us your worn set and we’ll tell you honestly whether a regrind cycle still works.

Same-day pickup across New England — MA, NH, CT, RI, VT, ME. Custom dimensions, non-standard materials, and one-off retrofits welcome. Call 508-987-6800 or request a quote online. 25+ years of industrial blade service to OEMs, recyclers, packagers, paper mills, and food processors.