| 摘要 |
PURPOSE: A disc brake is provided to easily attach a pin-side mounting portion of a protective boot to a sliding pin and smoothly conduct an operation for mounting of the protective boot. CONSTITUTION: A protective boot(24) comprises a bellows portion(25), a cylindrical portion(26), a guide-bore-side mounting portion(27), a thick-walled portion(28), a thin-walled portion(29), a pin-side mounting portion(30) and an air passage groove(31). In an operation for mounting of the protective boot, the pin-side mounting portion is inclined radially inward through the thin-walled portion while being slidably moved along a sliding pin(21), to thereby effect an escape of air contained in an annular space(S) between the sliding pin and the boot through the air passage groove. The thick-walled portion prevents the pin-side mounting portion from bending radially inward to an undesirable extent.
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