Rotor Knife

CUM684KE-RK




Bed Knife

CUM684KE-BK





Cumberland Grinder Knives

Model: 684


Since 1981, Services For Plastics, Inc. has manufactured Rotor and Bed Knives for all makes and models of Grinders. With hundreds of different types and styles of Knives in stock, we have one of the largest inventories of readily available shipping stock in North America. SFP stocks all major Grinder models and sizes of Knives, and we can provide same day shipping on all in-stock items.

If the make and model of your Grinder is unknown, send us a sketch or hard sample, and we can reverse engineer and design a suitable replacement Knife. We can custom manufacture any type of Knife and provide better than OEM replacement Knives per your specification for precise compatibility. All SFP Knives are made from Premium Heat Treated D-2 tool steel and match ground for superior accuracy.

Our precision grinding technology, EPIC Sharp® Edges, provides for better and more consistent pellet size regrinds and minimizes fines and coarses to improve your overall granulating process. Our superior dimensional accuracy and manufacturing tolerances, make SFP Knives better than any other Knife available on the market. The EPIC Sharp® Edge of our Knives retains its sharpness longer due to our state-of-the-art match grinding process.

SFP offers five (5) EPIC Sharp® Edge styles and Knife design profiles:
Keen Edge, Reverse Bevel, High Sheer, Reverse Bevel High Sheer and Hook configurations.

For extreme high wear applications, an ultra wear resistant tungsten carbide coating, over the premium D2 tool steel, is also available. Talk to one of our Knife specialists about your specific application, and we will custom tailor a design to best fit your granulating needs.

SFP also offers complete resharpening services, so you can always have a set of sharp Knives on hand. We take your old worn out Knives and custom match grind them back into usable sharpened Knives. In addition, SFP manufactures a complete line of all Grinder parts for repair and refurbishment of your Grinders. Grinder screens and even the rotors that hold the Knives are available.

Services For Plastics is your single source for all your Grinder Knife and screen needs!











Cumberland Grinder Replacement Knives

Rotor Knife Part No.

Part #: CUM684KE-RK

Part #: CUM684RB-RK

Part #: CUM684HS-RK

Part #: CUM684RBHS-RK

Part #: CUM684HOOK-RK

Bed Knife Part No.

Part #: CUM684KE-BK

Rotating Knife Dimensions

Part Length: 13.526 inches

Part Width: 3.312 inches

Part Thickness: 0.500 inches

EPIC Sharp® Edge Style: Reverse Bevel Edge

Bed Knife Dimensions

Part Length: 13.156 inches

Part Width: 2.756 inches

Part Thickness: 0.500 inches

EPIC Sharp® Edge Style: Square Edge


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