Drilling Holes

Pay attention to the following points when drilling holes:

If the floor is too hard and smooth to position the drill bit, use a nail punch and hammer to create an indentation for the mounting holes. Then use the drill bit to finish drilling holes.
Keep the drill bit vertical with the ground and hold the drill stock with both hands. Avoid shaking the drill stock; otherwise, the inclined drill bit will damage the floor.
Drill all holes to the same depth.

Install a Ф16 drill bit on the hammer drill.
Use the hammer drill to drill holes in the marked positions on a concrete floor. The hole depth is the total length of the expansion sleeve and expansion nut, in the range from 52 mm to 60 mm.
Remove dust inside and around the mounting holes with a vacuum cleaner, as shown in Figure 1.
Figure 1 Drilling a hole
Measure the hole depth and distance. If the hole depth or distance does not meet requirements, drill holes again.