Do’s And Don’ts of Masonry Drilling - Part Two
Part Two: the Donts
Just as important as the Do’s of drilling in concrete, are the Don’ts. We covered the Do’s in a previous article, now for the Don’ts.
Dont use bits that are much larger than you need. This goes along with a Do in part one. This is emphasized because it makes a lot of difference in cost. It will also increase the likelihood of bit breakage. Longer bits, especially, tend to bend and break, if one is not extremely careful. If you are going through a 4 to 6 slab, dont use a 27 bit. The bit will become worn out in the first 6 and youll have a bit that is shot while two thirds of the bit remains unused. Thats expensive.
Don’t use too much force. Drilling will not go faster with your additional push, let the weight of the hammer do the work. However, removing dust and debris from the hole can increase drilling speed. To do this pull the bit straight out of the hole every two to three inches. Clearing the swarf (debris) will also increase your bit’s longevity and decrease your chance of jamming your bit in the hole.
Don’t let a distraction keep you from drill straight on. Once you start drilling in a direction stay straight to avoid breaking your bit.
Dont use a heavy hammer for horizontal drilling. There is a tendency to want to get the job done fast. In, reality, it is hard to keep a bit going in the same direction while supporting the full weight of a heavy, powerful tool. Use a smaller hammer, even if it takes more time.
Dont try to drill a very deep hole with a very long bit. More hundred dollar drill bits have been broken than you might imagine. Start the hole with a small bit, and then use a medium length bit to continue. Finish the job with the long bit. Inability to remove swarf from deep holes will cause tremendous heat buildup. A broken bit comes next. Then you have a 20 hole with a 6 piece of a hundred dollar bit in the bottom. Not Good
Don’t pinch your pennies for a cheaper made bit. Heavy research and investment is primary for production of top quality brand bits. Brands such as Prestline Brand use only the best steel to produce top quality bits unlike the cheaper brands who use cheap labor and materials.
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