1. The method of speed-change is to use the stress, in which the belt pulleys push against each other to result, to force changes in the diameters of the belt pulleys so that the main spindle speed can be varied. It is easy to reach the required main spindle speed by lightly turning the speed controller without adjusting the belt. Thus, it is able to increase efficiency and reduce cost. And, it can also perform high torsion at a low spindle speed.
2. An attached main spindle speed meter on the machines can show the speed of main spindle exactly.
3. Equipped with JIH SHUN's patterned EM drilling and tapping system, JS-820VT can feed and return back the knife freely to prevent damaging the work pieces and tapping tools while it is tapping, and enhances tapping precision and production capacity.
4. JS-820VT is a precise construction and a patterned design. As an accident occurs in process of the tapping stroke, just use one hand to lightly push the grip handle backward so that JS-820VT can return back the knife immediately to avoid the tapping tip being broken. It is safe and reliable.
5. All exported machines are assembled with vertical type and packed into heavy-duty cardboard boxes individually according to the environmental protection of packaging practice.
