How to Drill a Hole in a Stainless Steel Sink

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Stainless steel sinks have a durable, chip-resistant surface that resists rust and stains, but their strength can be a problem if you need to drill a hole to install a sprayer or for some other reason. Not only can the drill wander, making precise location of the hole difficult, but a large drill may not bite into the surface at all. If you're installing a sprayer, you may be able to avoid drilling into the sink by installing it next to the sink on the counter top instead. You can add a hole to the sink itself, though, with a little work.

Things You'll Need

  • Masking tape
  • Nail
  • Hammer
  • Titanium or cobalt drill bits
  • Electric drill
  • Eye and hearing protection
  • File
  • Vacuum or damp paper towel
  • Stick a piece of masking tape over the area where you want the hole, to prevent the drill bit from wandering when you start it. Mark the precise center of the hole on the tape.

  • Hold the sharp point of a small nail against the mark and tap the nail with a hammer to make a slight dent, to help keep the drill in place.

  • Insert a 1/8-inch cobalt or titanium drill bit in an electric drill. Put on safety goggles and hearing protection. Drill through the sink at the mark, using the masking tape and dent to keep the drill from wandering.

  • Replace the 1/8-inch bit with a 1/4-inch bit and drill through the same hole to enlarge it. Repeat with a bit that's 1/8-inch larger than the previous one until you reach the size you need. If you have a step drill, use it instead to drill the series of holes at once. A step drill is a roughly cone-shaped bit that allows you to drill gradually larger holes without needing to change the bit each time.

  • Insert a small round file into the hole and file the edges larger, if you need a hole slightly larger than the size of the final drill bit.

  • Vacuum up the remaining particles of metal dust around the hole, or wipe them up with a damp paper towel.

Tips & Warnings

  • Add a drop of oil to the area you're drilling to reduce friction, and drill at low speed.
  • The edges of the hole may be sharp, so use gloves and work carefully, or file the edges smooth.

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References

  • Photo Credit Stainless Steel Sink image by Hedgehog from Fotolia.com
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