The diameter of the blade is 62.5mm and the caliber is 12.8mm. Please refer to it. All products on our official website come with a 12-month warranty. If you purchase a product that has a problem within one year, we will be responsible for you. Here is the link: https://www.vevor.com/pages/return-policy.
We do not sell parts separately. All our products have a 12 month warranty and if there is a problem with your purchase during the warranty period, we can send you a replacement part free of charge(In the case of parts that are not consumable). Please click the following link to contact us: https://www.vevor.com/pages/contact-us.
Firm ,straight beef fat doesn't grind easy in any size grinder. It grinds easiest if cut in smaller that 2 inch pieces and partially frozen. Suet, or kidney fat is even worse.
Easily grinds hard fat and a lot more....i love it...only drawback is that the tube does not come out so I must clean it by pouring hot water down with a brush, but no big deal...i would buy it again