Rotary Hammers & Hammer Drills
Rotary hammers drill concrete and masonry for anchors. They create silica dust and high torque, and they can grab hard when the bit hits rebar.
- Construction
Photo: rotary hammer with a shroud connected to a HEPA vacuum
Silica dust control
Drilling concrete creates respirable crystalline silica. Under OSHA’s Table 1, handheld drills in concrete should be used with a dust collection system (a shroud or integrated dust extraction with a HEPA-filtered vacuum) or water. See Crystalline Silica.
Operating safely
- Use the side handle and both hands; brace your body against twisting.
- Use a tool with an anti-rotation clutch if you can.
- Scan or check for rebar, post-tension cables, conduit and pipes before drilling. Never drill post-tensioned slabs without approval.
- Use the right SDS bit for the hole size, and don’t force it.
- Wear safety glasses, hearing protection and gloves.
- Don’t drill overhead without eye protection that seals against falling dust.
- Don’t blow dust out of holes with compressed air. Use a vacuum or hole-cleaning brush.
Video: drilling anchor holes with dust extraction
Standards & references
- 29 CFR 1926.1153: Respirable crystalline silica (construction), Table 1
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