Hello – thankyou, I’ve really enjoyed you work, and thanks for really useful advice on drilling stones, I’ve started drilling beach stones for a sculptural piece. But check out the comments below, because Seth from fans4pc managed to change my mind on his diamond bits which are both well priced and good quality.įor drilling holes in glass, check this new post out! I have had variable success with these bits depending on the vendor. As you can see, you can get bargains on Ebay. They know how to do it and have done it themselves and quality bits are a concern for this seller too. And the website includes great tips for drillers. His prices are very competitive if you buy in bulk. However, I think I am going to go with Daniel Lopacki. I was somewhat interested in the drill bits from Bay Treasures because these are clearly lapidary enthusiasts and concerned with quality products. I have bought poor quality bits too, but not from any of the suppliers mentioned above. They are good quality, but their current prices are not competitive. I have previously bought drill bits (and other stuff) from Dad’s Rock Shop. That tells me whether the seller has first hand experience with drilling stones. I read every web site in detail and looked at the “about” section. $1.32 (min 30 bits)Ĭovington Engineering $1.00 (min 50 bits) Lasco Diamond Products $1.75 (1.5mm Diamond drill bits only) The prices are per drill bit.ĭad’s Rock Shop $3.50 (no discount for large quantities) I did a google search for ‘1 mm diamond drill bits’. I usually order large quantities, say 300 – 1000 bits. So, once again I have decided to go with cylinder bits and I want diameters of 1-2 mm. Drill even more carefully and without exerting much pressure if you are making a hole in glass. In terms of how long they last before they are totally dulled up, it’s your technique which is most important: drill slowly, under water to keep everything cool and with a relatively slow rpm (<2000). They work for really hard stones and they work with glass. Most sources have a variety of sizes to offer. Considering the cost, I still prefer the simple cylinder bits or the twisted bits. If you are not sure what this means you can check out pictures of these bits at Dad’s Rock Shop. There are 1) cylinder bits, 2) twisted bits, 3) shank bits, 4) core bits, 5) crinkled core bits, 6) cintered core bits. This post is about how to choose a supplier! Drill bits come in very different quality, so you want to choose carefully.įirst, lets consider the different types of bits. I am out of bits again and I just scoured the web for suppliers. I buy them in bulk because we use so many. We use cylinder drill bits that are coated with diamond dust (simply called diamond drill bits). Take a look at the comments to this post about different models of Dremel drills. The quarzites are hard (7 on the Mohs scale) and the sedimentary or sand stones are much softer (about 3-5 on the Mohs scale) and therefore easier to drill. They come in different hardness measured on a 1-10 Mohs’ scale. I have worked with beach stones for about 12 years.
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