Most of the milling cutters used in machining centers use spring clamps and are in a cantilever shape when used. During the milling process, sometimes the milling cutter may gradually protrude from the tool holder, causing the workpiece to be scrapped. The reason is generally caused by the presence of an oil film between the inner hole of the tool holder and the outer diameter of the milling cutter shank, resulting in insufficient clamping force. Milling cutters are generally coated with anti-rust oil when they leave the factory. If non-water-soluble cutting oil is used during cutting, a mist-like oil film will also adhere to the inner hole of the tool holder. When there is an oil film on both the tool holder and the tool holder, it is difficult for the tool holder to firmly clamp the tool holder, and the milling cutter during processing will become loose and lost. Therefore, before clamping the milling cutter, the handle of the milling cutter and the inner hole of the tool holder should be cleaned with cleaning fluid and dried before clamping.

When the diameter of the milling cutter is large, even if the tool holder and tool holder are clean, a tool loss may still occur. In this case, a tool holder with a flattened notch and a corresponding side locking method should be used.

Another problem that may occur after the milling cutter is clamped is that the milling cutter breaks at the tool holder port during processing. The reason is usually caused by the tool holder being used for too long and the tool holder port having been worn into a tapered shape. At this time, it should be Replace the tool holder with a new one.