Drilling Lag Bolts Into Concrete

In hard dense materials like concrete or stone this minimum 1 in.

Drilling lag bolts into concrete.

To install a lag shield into concrete first drill a hole that is the same diameter as the outside diameter of the lag shield. Drill a hole into the material that is smaller than the diameter of the lag screw. In this video i will show you how to drill into brick concrete and cement with a drill and also how to attach fix mount or anchor into a brick concrete or. Lag bolts for concrete are used with an anchor or insert called a lag.

How concrete lag bolts work. A standard drill is insufficient when drilling into concrete because the drilling rotating action is not enough to break the concrete. The process involves drilling appropriate sized holes into concrete to the proper depth using a hammer drill with a masonry bit cleaning out the drilled holes to remove the concrete debris. The lag is an expanding insert with a jacket of hard metal that grips the sides of the drill hole.

The nut and washer will help protect the anchor and. The smaller the pilot hole the more effective the lag screw will be. Select a screw length to penetrate the concrete at least 1 in. Next take a hammer and tap the lag shield down into the hole you ve drilled until its flush with the surface.

Tools needed to drill into concrete it is important to use a hammer drill or rotary hammer drill in concrete applications. Attaching a fixture with wedge anchors 1. Screw embedment will work fine. Start the drill and push forward with firm but not heavy pressure.

If you encounter an. They are made specifically for the installation of lag screws into masonry materials. Line up your fixture or whatever you want to attach to the. You also do not have to go very deep.

Replace the drill in the pilot hole ensuring that the drill is perpendicular surface. A good rule is to drill your pilot hole a third of the length of the screw. The center part of the lag is made out of a softer metal like zinc mixed with soft iron or lead. Before drilling you will also want to measure the length of the lag shield and drill down the length plus a little extra space.

Place the fixture over the concrete and line up the holes.