With a recent trip to the Plastics show in Orlando Florida, I spoke with lots of the granulator manufacturers. While they encourage their customers to purchase OEM blades from them, it's more of an afterthought when compared to a business model.
The fact remains that many OEM's do not manufacture their own blades. Blade sizes and configuration are far more an issue of machine design and utility. Besides, if you'll need a new car battery, you will in all probability to go a respected battery manufacturer than to return to the vehicle brand that it comes.
Think about the question of how to steadfastly keep up the blades. All things considered, you'll need to think about the price of the blades and how to get the most out of them. Granulator blades are considered Industrial Knives. Industrial Knives cover a wide selection of industries that use specialized knives, or blades, in their respective process. As a result, you will need to find a specialist in the Industrial Knife business with a solid standing of quality and integrity.
Another important consideration is material. A top quality tool steel will give you the longevity for the particular process. Probably the most standard material used is D2. D2 is also referred to as tool steel and is just a high-carbon, high-chromium steel. D2 may be hardened to 64rc giving it the hardness for endurance and impact resistance. It can be worth mentioning that there are a very limited number of business'available that have the correct equipment to grind and or sharpen this material. So preferably you wish to choose someone who is able to also maintain the blades to factory specs.
Material and hardness are key factors in wear ability. You can find other treatments that lend themselves to situations where abrasion resistance is needed. Cryogenics and carbide treatments are some examples.
While it holds true there are an array of suppliers for high quality granulator blade Precision Surface Grinding, it is key that you have a vendor/supplier that has your back (so to speak). Have you got a supplier that will maintain the blades to factory specification? Are you experiencing a supplier with manufacturing capabilities that understands the correct tool steels and hardness characteristics? Knowing that the OEM doesn't make the first blades which can be used in the new machine, who'd they outsource to? More frequently than not it comes down to price, keeping the price of the device down.