Pingyuan Haotian machinery Co.Ltd  is located in the largest production base of machine tool accessories in China.We are specialized in researching,producing and developing many kinds Of collets, drill chuck, CNC tool holders, retention knobs, ER nuts, ER spanners, machine vises, parallel blocks  and so on. With high precision and full varieties. All of our products are deeply trusted by customers both at home and abroad.

The principle of heat shrinkable tool holder is a hot-loading system that uses a difference between the thermal expansion coefficients of the tool holder (special stainless steel) and the tool (hard alloy) to clamp the tool strongly and with high precision. The accuracy is no less than that of a hydraulic tool holder, with a runout of about 0.0025mm.

The principle of heat shrinkable tool holder is a hot-loading system that uses a difference between the thermal expansion coefficients of the tool holder (special stainless steel) and the tool (hard alloy) to clamp the tool strongly and with high precision. The shank material uses special stainless steel for hot-packing with a large thermal expansion coefficient, which achieves low-temperature hot-packing at 300 ° C. Simple hot air heating device using industrial hair dryer. With a collection of 3,500 tool holders of different shapes, we can handle everything from high speed and finishing to heavy cutting, milling, drilling, and reaming.