According to the difference of the processing object and the material of the tool, generally the drill sleeve will be made of cemented carbide or alloy steel; the drill sleeve of the high-speed steel drill or reamer tool will generally be made of alloy steel or cemented carbide.
Carbide drill bits or drill sleeves for reamer cutters are made of carbide. From the perspective of the material of the drill sleeve, although it has finally reached a higher hardness (generally, the hardness of the alloy steel drill sleeve after heat treatment is about HRC58-65, while the hardness of the carbide drill sleeve is higher, which can reach 89-- 93HRA).
