The invention relates to the technical field of hardware parts production, and discloses a hardware parts
grinding machine and a
grinding assembly thereof, wherein the
grinding assembly comprises a grinding disc, a clamping
assembly is placed on the grinding disc, and the clamping assembly comprises a counterweight block, a
retaining ring is clamped on the outer side of the counterweight block, a clamping strip is arranged on the side of the counterweight block, a clamping groove is arranged on the inner side of the
retaining ring, the clamping strip is slidably connected in the clamping groove, a
gasket is placed inside the
retaining ring, a hardware part body is uniformly clamped on the
gasket, a limiting shaft is fixedly arranged on the top surface of the counterweight block, and a sleeve tube is fixedly arranged on the top surface of the limiting shaft; in the present invention, an auxiliary spring and a spherical block are arranged, and while the counterweight block presses the hardware part body, the elastic force of the auxiliary spring presses the
gasket to keep the gasket flat, thereby preventing the hardware part body from being unable to be tightly clamped with the hardware part body, resulting in serious wear of the hole.