PURPOSE: To make a light, heavy duty and high precision multistage V-pulley by press-molding both edge surfaces of a metal pipe of specified length and of more than wall thickness and welding a materials of press disc base wall parts drilling specified wall thickness and rolling a peripheral wall poly V-groove.
CONSTITUTION: A center flange 2a and around a metal pipe 1 of specified length and of more than 3mm at wall thickness and flanges 4b, 4c on both sides of surface are press-molded. A flange part 6a around a metal disc 6 of 2.0W2.6mm at wall thickness is press-molded and specified mounting pores 6b, 6c are punched. Both flange parts 6a, 4b are welded to make a bottom cup 8 and a poly V- groove 10 is rolled and molded around wall parts 9a, 9b. Each part of pulley has necessary and sufficient intensity of wall thickness and is light, and dimensional precision is accurate. And gold molding and press-process are skipped more than previously.
| JP3792158 | Idle pulley |
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SUGIURA TADASHI
SUGIMOTO HITOSHI
