How to drill and tap holes for brackets

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This document contains the comprehensive information for how to drill and tap holes for brackets use or handrail brackets


  • ​Wear protective ANSI approved safety glasses, working gloves and breathing mask at all times
  • Inspect before installation or use; do not use if parts are loose or damaged
  • Use for intended purposes only

It is the responsibility of Inline Design customers to comply with city, national, and international building codes. Please ensure proper research is conducted prior to the installation due to variations of city building codes. Inline Design is not liable for ensuring that projects meet code requirements

Tools Required

  1. Puncher
  2. Hand drill
  3. Drill bit
  4. Tap bit
  5. Cutting oil
  6. Marker Pen

Chart of drill & tap bit size according to type of bracket 






1) Mount the posts to the floor or the brackets to the wall before installing the handrail tube. Please refer to other instructions document found on our website for help in that operation

2) Place the handrail tubing on the saddles. Mark the drilling points using a marker

3) It’s very important not to skip this point otherwise the drill bit will skid. Remove the handrail then place it on a working table. Mark the drilling points with a puncher or an automatic center puncher. Punch a couple of times in the same location to make the drilling point deeper.                                                                                                                                                                                                                                              

4) Use the corresponding drill bit size shown in chart 1 

5) Dip the drill bit into a small cap filled with cutting oil

6) Hold firm but without pressing too hard the hand-drill then gradually apply pressure to drill through the top rail with stopping a couple of times to oil the drill bit. Finish drilling all the points.    


7) Replace the drill bit with the corresponding tap bit shown in chart 1

8) Dip the tap bit into the cutting oil cap

9) Tapping is to be done at a slower speed then drilling. Start at a slow speed then increase the speed to medium whenever the tap catches a couple of threads. Reverse the direction of tapping and pull carefully while keeping the tap bit straight