Lengthened guide wheel

The utility model relates to a lengthened guide wheel, which comprises a guide wheel body. The length of the guide wheel body is 880 mm. The two ends of the guide wheel body are provided with a protruding member respectively. The diameter of each protruding member is 225.05 mm. An elongated member is sleeved onto each of the protruding members, on the two ends of the guide wheel body. Each elongated member is of a circular ring-shaped structure. The outer diameter D1 of each elongated member is 328+/-0.3 mm. The inner diameter D2 of each elongated member is 225 mm. The thickness H1 of each elongated member is 25 mm. The elongated members are in interference fit with the protruding members of the guide wheel body. Therefore, the length of the guide wheel of machining equipment is increased from the original 880 mm to 930 mm. The wiring length of the guide wheel of each silicon chip machining equipment is prolonged on the premise that the original manufacturing process and the original manufacturing material are kept unchanged. In this way, the production of extra 150 silicon chip per equipment is realized, and the production cost is effectively reduced.