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Lab talk, the good, the bad, and the ugly
Dental-CAM
Milling Burs. Is there a difference between an expensive bur and a cheap one? What is it?
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<blockquote data-quote="tuyere" data-source="post: 358891" data-attributes="member: 26916"><p>As a general rule for anybody buying milling burrs for dental purposes, I highly recommend familiarizing yourself with machinist's suppliers, figuring out exactly what sorts of tools are being marked up and resold to you- what shank diameter does your mill require? how many flutes? what's the coating? helix angle? etc etc- and then buying directly from the source. Learning a little bit about industry tooling can pay enormous dividends, and you don't have to compromise on quality. You probably won't have a ton of selection because normal end mills have variable shank diameters vs. everything using a standardized shank, but you should still be able to find lots of workable options within that, for probably 1/3 the cost per tool or less.</p><p></p><p>For example, we needed a 4mm square end mill to run calibration cubes on our Rolands; 4mm end mills aren't used for normal production because, as I understand it, the DWX51/52-class machines don't have the torque or backbone or low-RPM drive to cut hard materials with such a (relatively) large tool. It's sold as a special accessory from Roland for over $100 per tool. I can't find that specific tool online but here's a comparable 3mm mill: <a href="https://usdentaldepot.com/30-flat-end-carbide-milling-bur-roland-zrb-100d" target="_blank">https://usdentaldepot.com/30-flat-end-carbide-milling-bur-roland-zrb-100d</a></p><p>Here's an equivalent 3mm carbide end mill from a normal Canadian tooling supplier: <a href="https://www.kbctools.ca/itemdetail/5-310-088" target="_blank">https://www.kbctools.ca/itemdetail/5-310-088</a></p><p>$107.59 USD for the name-brand Roland tool, $12.79 CAD from KBC Tools.</p><p>Literally like 1/15th the cost, it's wild. The KBC tool isn't ~premium~ but it illustrates how dramatic the mark-up can be for this stuff.</p><p></p><p></p><p>e: look specifically for miniature end mills from tooling suppliers, they *do* use standardized shank diameters there in the same way that dental tooling does. KBC is Canadian and we still favour imperial for tooling because of the US being our main market, so they stock mini tooling standardized around 1/8" and 3/16" shanks, which isn't useful for our Rolands- but I'm sure other markets must have metric-based mini end mill systems that use the same shanks as dental mills do.</p></blockquote><p></p>
[QUOTE="tuyere, post: 358891, member: 26916"] As a general rule for anybody buying milling burrs for dental purposes, I highly recommend familiarizing yourself with machinist's suppliers, figuring out exactly what sorts of tools are being marked up and resold to you- what shank diameter does your mill require? how many flutes? what's the coating? helix angle? etc etc- and then buying directly from the source. Learning a little bit about industry tooling can pay enormous dividends, and you don't have to compromise on quality. You probably won't have a ton of selection because normal end mills have variable shank diameters vs. everything using a standardized shank, but you should still be able to find lots of workable options within that, for probably 1/3 the cost per tool or less. For example, we needed a 4mm square end mill to run calibration cubes on our Rolands; 4mm end mills aren't used for normal production because, as I understand it, the DWX51/52-class machines don't have the torque or backbone or low-RPM drive to cut hard materials with such a (relatively) large tool. It's sold as a special accessory from Roland for over $100 per tool. I can't find that specific tool online but here's a comparable 3mm mill: [URL]https://usdentaldepot.com/30-flat-end-carbide-milling-bur-roland-zrb-100d[/URL] Here's an equivalent 3mm carbide end mill from a normal Canadian tooling supplier: [URL]https://www.kbctools.ca/itemdetail/5-310-088[/URL] $107.59 USD for the name-brand Roland tool, $12.79 CAD from KBC Tools. Literally like 1/15th the cost, it's wild. The KBC tool isn't ~premium~ but it illustrates how dramatic the mark-up can be for this stuff. e: look specifically for miniature end mills from tooling suppliers, they *do* use standardized shank diameters there in the same way that dental tooling does. KBC is Canadian and we still favour imperial for tooling because of the US being our main market, so they stock mini tooling standardized around 1/8" and 3/16" shanks, which isn't useful for our Rolands- but I'm sure other markets must have metric-based mini end mill systems that use the same shanks as dental mills do. [/QUOTE]
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Milling Burs. Is there a difference between an expensive bur and a cheap one? What is it?
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