| 摘要 |
<p>PURPOSE:To prevent uneven abrasion of a friction pad by pressing the friction pad simultaneously by a plural number of pistons. CONSTITUTION:An interference of a piston seal 15 provided in a cylinder hole 6 on the rotation outlet side of a disc rotor is set more loosely than an interference of a piston seal 16 provided in a cylinder hole 7 on the rotation outlet side of the disc rotor. Additionally, the peripheral surface of a piston 8 is processed smoother than the peripheral surface of a piston 9, and the piston 8 is set to actuate at a pressure lower than that of the piston 9.</p> |
