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Troubleshooting Lag Shield

Troubleshooting Lag Shield

Purchase Lag Shield Anchors

Problem: Lag shield spins in the hole.

Trouble Shooting Tips:

  1. Bit used to drill the hole is not the correct size.
  2. Carbide tipped bit does not meet ANSI standards, which ensures hole tolerance requirements for masonry fasteners.
  3. The hole was not drilled using a hammer drill with the switch in the hammer and rotation mode.
  4. The material is so soft that the proper dimension hole can not be achieved another type of fastener should be considered.

Problem:  Lag Shield does not expand all the way.

Trouble Shooting Tips:

  1. The base material is hard if using the long lag shield try a short lag shield.
  1. The screw being used may be too short to expand the anchor properly, try using a longer lag screw to ensure proper expansion.

Problem:  Lag shield is not flush with the surface of the base material.

Trouble Shooting Tips:

  1. The hole must be drilled to a minimum depth equal to the length of the lag shield being installed.
  1. Use a depth gauge provided with the hammer drill to ensure proper hole depth.  If a depth gauge is not available use tape to mark the bit and the desired drill depth.
  1. When setting the depth gauge or tapping, make sure that the bit is in the most protracted position.
  1. Drilling the hole deeper will increase the holding values and will ensure that the lag shield does not protrude above the surface.
  1. The tip of the bit is angled; make sure that it is not included for the depth of the hole.
  1. Clean the hole of all dust and debris before inserting the lag shield in the hole.

Problem:  Hole diameter is larger than the bolt.

Trouble Shooting Tips:

  1. The diameter of the hole required for a sleeve anchor to be installed in is equal to the outside diameter of the lag shield anchor. 
  2. The bolt diameter is equal to the inside diameter of the lag shield being used.  The designated diameter of the lag shield is equal to the bolt diameter.

Problem:  Screw does not work in the lag shield.

Trouble Shooting Tips:

  1. Both the short and long lag shields require a lag screw.  A lag screw is a specific type of fasteners with specific types of threads required for the lag shield to expand properly.
  1. If the screw being used is a lag screw, then it may be too short, not allowing the lag shield to fully expand.

Problem:  Spotting the holes to meet up with the holes in the item being fastened.

Trouble Shooting Tips:

  1. All internally threaded masonry fasteners require the hole to be marked with the item being fastened in place. 
  1. Instead of marking the holes then drilling, try using a smaller diameter bit and drill a pilot while the fixture is in place. Then remove the fixture and re-drill with the correct diameter bit.