Unverified80% confidenceDecision RuleTime unknown
混凝土墙钻孔应使用冲击钻配6-8mm钻头，钻孔深度需比膨胀螺栓长5mm以容纳粉尘，孔径过大会导致膨胀管打滑失效
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Unverified瓷砖墙面打孔需用玻化砖专用钻头+慢速冲击，普通冲击钻直接打易崩瓷；打孔位置应避开瓷砖缝隙2cm以上，避开砖角82% similarUnverified标准膨胀螺栓（6mm）在实心混凝土墙单点承重可达15-25kg，但瓷砖面需先用玻璃钻头开孔避免瓷砖崩裂，且螺栓需穿透瓷砖打入基层墙体79% similarUnverified空心砖墙或石膏板隔墙不能用普通膨胀螺丝，需使用飞机型膨胀螺栓或穿透式对拉螺丝，否则承重会随时间松脱，单点承重要按标称值打5折计算78% similarUnverified瓷砖墙面钻孔需用玻化砖钻头低速开孔并避开砖缝，膨胀管应打入瓷砖后的水泥层≥3cm，仅固定在瓷砖釉面层会导致爆瓷脱落78% similarUnverified免打孔无痕胶挂架单点承重普遍≤3kg，超过5kg必须选膨胀螺丝打孔安装，瓷砖墙面还需配专用瓷砖钻头避免爆裂78% similar
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