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.

Drilling lag bolts into concrete.

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. In hard dense materials like concrete or stone this minimum 1 in. A standard drill is insufficient when drilling into concrete because the drilling rotating action is not enough to break the concrete. Screw embedment will work fine.

The smaller the pilot hole the more effective the lag screw will be. Start the drill and push forward with firm but not heavy pressure. Line up your fixture or whatever you want to attach to the. Lag bolts for concrete are used with an anchor or insert called a lag.

Next take a hammer and tap the lag shield down into the hole you ve drilled until its flush with the surface. 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. Slide a washer and nut over the threaded end of the anchor. Attaching a fixture with wedge anchors 1.

How concrete lag bolts work. The lag is an expanding insert with a jacket of hard metal that grips the sides of the drill hole. Before drilling you will also want to measure the length of the lag shield and drill down the length plus a little extra space. Replace the drill in the pilot hole ensuring that the drill is perpendicular surface.

You also do not have to go very deep. The center part of the lag is made out of a softer metal like zinc mixed with soft iron or lead. The nut and washer will help protect the anchor and. They are made specifically for the installation of lag screws into masonry materials.

If you encounter an. Place the fixture over the concrete and line up the holes. A good rule is to drill your pilot hole a third of the length of the screw. Run the drill at a slow to medium speed and pull the drill out periodically to help remove concrete dust from the hole.

To the thickness of the material you re attaching to get the minimum length of screw needed.