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Your cart is empty.Bosch Porcelain Tile Bits are engineered for fast, accurate, and efficient drilling in hard materials like porcelain and ceramic, marble and granite tiles, and more. The durable carbide tip is optimized for ceramic tile drilling and delivers up to 5X more life than Bosch glass and tile bits when drilling in porcelain tile. An innovative arrow-shaped design allows for faster, easier drilling with less friction, for reduced bit wear and tear, delivering extended life. The bit’s enhanced centering zone delivers easy positioning for more precise drilling. Experience maximum torque transmission and secure connection with the chuck through the impact-rated hex shank.
LB
2025-08-02 10:53:26
I got these to drill drainage holes into porcelain bowls to turn them into planters. They did the job. I read somewhere that when drilling these hard brittle materials, lubricating would help prevent overheating and keep the bit sharp longer, I tried lubricating with 3-in-1 household oil for the first hole, and with water for the second, Lubricating was indeed a very good idea, because it also keeps the dust contained. I had zero airborne dust. I found it drilled faster with water. I drilled in short bursts and allowed the bit to rest and cool down frequently.The drilling was generally not very fast or satisfying. I guess brittle materials are never fun to drill into. But they did the job. For the first hole, I had pretty bad "tearout" on the exit side, with large porcelain shards chipping off when the bit broke through (probably not a concern for tiles, since they'd chip on the hidden underside). I figured if it's like wood tearout, some blue painter's tape would help support the porcelain around the hole and reduce tearout if not eliminate it. Sure enough, my 2â¿áµˆ hole was much cleaner with blue tape, though not perfect. Maybe if the support were thicker and more solid, like thick dense foam instead of tape, I'd've got a perfectly clean underside.The bit tip seemed mostly intact after 2 uses. The blue coating had worn off, but the bevels looked fine under a magnifying glass, without any nicks or burrs.Overall, I'm happy with this set and the size assortment.
Christopher D.
2025-07-19 13:57:39
These bits work well. I like the new design and they do wander less than my old stand-by Bosch glass and tile bits.I just started using these and I do doubt they'll last 5x as long as properly utilized glass and tile bits. Those are what I've been using for years and I swear by both Bosch (and now Milwaukee). Don't buy the cheap imitation bits on Amazon. Those must use a lower hardness or lower quality carbide that just doesn't hold up; either that or just badly copied design and quality control. You'll be miserable and disappointed--it's better to pay up so that you have a quality drilling experience.The thing to remember about these carbide bits is that carbide is brittle. If you stick these into a started hole with something to catch a carbide edge and you try to start the bit very quickly, you can easily crack the carbide and basically ruin a great bit. Slow, steady, light pressure and keep the bit cool by dipping it into a glass or water or making some kind of putty pool for the bit against the wall.I always use the small bits to drill pilot holes and then I widen them with the more expensive larger bits. In that way, you preserve the tip on the larger bits for longer. You will obviously wear through the smaller bits at a steeper pace.
Kathy
2025-06-11 13:31:07
My review is for the BOSCH PTBX05 5 pc. Porcelain Tile Drill Bit SetSo far...I have only had the guts to try on some tile in the bathroom that needs a total gut job. I want to add some design features in the shower, requiring mega drill bits like these. on my trial project, they worked PERFECTLY...but go slow!Bottom line: I would purchase again. Bosch proving yet again the brand is quality.
Gary From Chicagoland
2025-04-29 17:49:16
Replacing a single bath tile is a ton of work, and I wanted to avoid that task while hanging a metal hook into my thick uncracked tiled shower wall. I have learned the hard way, buy the best tool to get the job done right the first time. When I was an installer for residential AC units, I had to drill from the outside backyard into the basement ceiling joist to run my copper refrigerant lines. For years, I used the same drill bit with an arrow shaped carbide tip that torn through hard bricks. The outside coated surface wore off this drill bit, but the carbide tip always worked great. I was pleasantly surprised to find Bosch has this same design in this five piece drill set intended for drilling into hard surfaces like marble, granite and thick bathroom tiles. The 3/16th inch drill bit did not skate while initiating my hole into the thick shower tile. It started with a pinpoint hole, then grabbed into the thick tile as I pushed inward. It worked great and I’m glad to state I didn’t crack the tile. The plastic case was a challenge the first time to open, but it’s a good storage container. Overall, I got the right tool to make my do-it-yourself job easier.
Professor62
2025-02-15 12:58:24
BOSCH PTBX05 5 pcs. Porcelain Tile Drill Bit SetFor the homeowner or DIYer, these bits won’t be used often but when they are needed, they’ll come in handy—and will work just fine for general purposes. Made by a big-name tool company, these porcelain tile bits were designed in America and fabricated in China. The bits are designed for drilling in particularly hard materials—such as porcelain, ceramic, stone or marble. Among the 5 bits there are 3 different sizes: 3/16†(x2), 1/4†(x2), and 5-16†(x1). When they are described as being “optimized†or as “lasting 5x longer†(than regular tile drill bits), this is for one good reason: the tips of the bits have been coated with carbide, a semi-metallic compound that is extremely hard and very difficult to melt. Therefore I wasn’t too surprised when the bits made fairly easy work of the porcelain tile, granite tiles, and a ceramic scrap (I didn’t have a piece of marble tile) that I drilled through. Notably, after drilling twice in each material (and after cleaning off the tip), the tips of the bits looked virtually unused. I suspect that these carbide-tipped bits will hold up well over time and with use. Thus I think it’s only fair to give them an approving thumbs up.
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