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PVD coatings are much harder than the base materials they are applied to. They are also inert and do not react with materials they come into contact with. This combination of being hard and inert reduces the friction between the tool and the workpiece and can result in tools lasting up to ten times (10x) longer, or more, than uncoated tools.

If you have a Dremel we highly recommend using the Dremel 4486 Multi Chuck to hold these small drill bits. All sizes from 0.75mm upwards can be held in this chuck.

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Titanium nitride was the first general-purpose coating. It’s been around for a long time for one simple reason, . . . it works. Whether it’s cutting tools, punching or forming, or injection molding, users know they are going to get anywhere from 2 to 10 times the tool life by using this coating. TiN is the coating of choice for medical applications.

Adding carbon to a TiN film increases the hardness by nearly 80%, resulting in 2 to 3 times the tool life over titanium nitride. For improved performance and longer tool life, try TiCN in punching, injection molding, and cutting tool applications.

Tip: The following three crucial elements when drilling will prevent the diamond grit from wearing off or burning away, prevent the drill bit from snapping (too much pressure applied), prevent your material from cracking,  and extend the life of your drill bits.

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To get the best from our diamond tipped drill bits, please ensure you read through the Tutorials section on our blog before attempting to use our drills for the first time. Here, you will find tips and video footage on how to drill glass, how to drill gemstones, how to drill bottles, how to drill pebbles and how to drill sea glass. There are also helpful hints on the correct speeds and pressure to be used.

You might also like to read our article: 12 Things You Should Know about Diamond Drill Bits Small Diamond Drill Bits Versus Small Diamond Core DrillsThese small diamond drill bits are solid and, therefore, have a larger surface area than the small diamond core drills, making them more robust.  Due to a larger diamond coated area than the core drills, they may last longer and drill more holes. They must certainly be used for drilling holes in particularly tough sea glass, gemstone, porcelain and any stone high on the Moh's scale.Small Diamond core drills will glide through the material a little easier and more quickly, making them the ideal choice for beginners.When using a diamond cylinder drill bit for glass or diamond drill bits for stone, users often keep a combination of both types in their tool kit in case they come across a tough piece. You may also find a personal preference for using one over the other.  .

When using a diamond cylinder drill bit for glass or diamond drill bits for stone, users often keep a combination of both types in their tool kit in case they come across a tough piece. You may also find a personal preference for using one over the other.

Alpha™ is an extremely hard, all-purpose, multi-layered coating that has ZrN as the top layer.The bulk coating is much harder than its individual components. This synergy results in exceptional abrasion resistance and lubricity. Alpha™ outperforms most other PVD coatings in cutting tool and punching applications and provides 2 – 4x the tool life over TiN coatings.

Due to the differing hardnesses and other intrinsic properties, the premium coatings (Alpha™, TiCN, and AlTiN) usually provide longer tool life than TiN.  CrN is the toughest coating, which allows us to apply a thicker coating which counteracts this coating being slightly softer.

These are our premium, precision-made small diamond drill bits.  These super small diamond cylindrical drill bits are excellent for drilling small holes in some of the hardest materials. Very popular with jewellery makers, these diamond tip drill bits are used for drilling holes in shells, tough glass, beads, sea glass, hard stone, gemstones, concrete, pebbles, precious and semi-precious stone, porcelain, optical material, pearls, composites and rock.

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You will need an adjustable chuck attachment for your drill to hold the small shank sizes of these drill bits. Please look at the technical 'tab' to read the shank size dimensions.

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AlTiN is the coating of choice for high temperature applications. The aluminum in the film converts to aluminum oxide as the coating heats up, resulting in great oxidation resistance. Use this coating in your most demanding cutting tool applications and other applications where a lot of heat is generated.

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​If your company has a need for a coating not shown here, give us a call.  We may be able to provide it for you, or refer you in the right direction.

*Published by Production Machining, a media brand that covers advanced new technology, practices, and processes in the manufacture of precision machined parts in high volumes.

These small diamond drill bits are solid and, therefore, have a larger surface area than the small diamond core drills, making them more robust.

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Disclaimer. To the best of our knowledge, using rotary tools near water has never been endorsed by any of the rotary tool manufacturers. If you do choose to drill near water or with attachments under water connected to your drill then you do so at your own risk. Please be aware that mixing electricity and water can be very dangerous.

Due to a larger diamond coated area than the core drills, they may last longer and drill more holes. They must certainly be used for drilling holes in particularly tough sea glass, gemstone, porcelain and any stone high on the Moh's scale.

The chart to the right shows the approximate hardnesses of our coatings compared to some common tool steels and carbide.  Please note that these numbers are only approximate for hardnesses above 70 Rc (1075 Hv) since Rockwell C testing is not done above that hardness.

Chrome nitride shines in heavy-duty forming applications. We’ve had customers that were polishing their dies every 300 to 500 hits that now get 25,000, or more, without touching their dies. CrN is very tough and has excellent lubricity. ​

Applying a PVD coating to cutting tools as well as medical devices can offer functional advantages for both applications. Surface Solutions owner, Michael Schultz, explains everything you need to know.

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We continue to do research on additional coating materials, including nano-layered films and carbides, and will offer these materials when (if) they become economically feasible.

​All five of our coatings are significantly harder than carbide, with TiN and CrN being in the 2200 – 2700 Hv range; and Alpha™, TiCN and AlTiN being in the 3600 to 4600 Hv range.

Small Diamond core drills will glide through the material a little easier and more quickly, making them the ideal choice for beginners.