“331-900-0105Initial Jewelry for Standard Body PiercingA standard body piercer must meet the following jewelry grade standards for initial piercings unless requirements listed in subsection (5) of this rule are met. (D) All threaded or press-fit jewelry must have internal tapping (no threads on posts);(E) For body jewelry purposes, surfaces and ends must be smooth, free of nicks, scratches, burrs, polishing compounds and metals must have a consistent mirror finish.(2) A licensee must have a “Mill Test Certificate” for all jewelry used for initial piercings which provides evidence of a specific grade of metal with a code designation from the ASTM or ISO, which must be available on the facility premises.” Internally threaded jewelry has no screw on any part of the piece that’s being worn in the body. This means the jewelry is completely smooth when it passes through your piercing. Internally threaded jewelry also has things like insertion tapers, that screw into the jewelry to allow for a comfortable insert and removal of the pieces. Internal threading also has something called a countersink. This is a little divot in the partnering beads that allow them to slide over the barbell and grip down onto the bar when tightened; making them much more secure! In the end, the preferable and safest option is the modern internally threaded style. Board of Electrologists and Body Art Practitioners Rules – OAR Chapter 331, Divisions 900-950

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Lubricant should be applied to both the drill bit and the drilling surface. To reduce the temperature, repeat this step between drillings.

Hardened steel is used in energy,  transportation, general mechanical engineering components, and many other applications. Axles, arbors, driving pinions, camshafts, and Cardan joints are examples of hardened steel components.

Carbide drill bits are the toughest drill bits available and best for drilling hardened steel. Carbide is a  compound made from tungsten and carbon. Carbide drill bits are typically composed of steel that has a carbide tip.

Therefore, cobalt drill bits have a longer life and are more heat resistant than titanium drill bits. Which means cobalt drill bits are typically better since they are much more durable than titanium-coated bits and can drill holes through the hardest metals.

If you are in the process of drilling hardened steel, maybe for one of the reasons mentioned above, or potentially something completely different, why not take a look at the drill bits we have available for metal. Our range is designed for high end performance and is suitable for those drilling hardened and normal stainless steel.

Titanium drill bits are high-speed steel bits with a titanium nitride covering. Titanium-coated drill bits provide many advantages over ordinary steel bits, including the ability to endure greater temperatures, increased wear resistance, and higher durability.

Titanium drill bits are high-speed steel bits with a titanium nitride (TiN) coating, whereas cobalt drill bits do not have a coating; the entire bit is constructed of alloy steel that contains 5 to 8% cobalt.

Cobalt has a high melting point of 1495°C, making it ideal for high heat drilling applications like hardened steel. The most common are M35, a 5% alloy, and M42, a 7% alloy.

Make sure the piece of metal is in a flat and secure area. Holding the metal with one hand while running the drill with the other is not a good idea. It is better to secure the metal with a clamp.

Titanium can also be anodized, so if you’re ever unsure of whether something is titanium or not, try anodizing the jewelry which will confirm the material right away! Titanium and steel do however come in different grades, which is why we stress looking for implant grade above all. Aside from externally threaded jewelry being produced in lower quality materials, the style overall has presented many issues. With externally threaded jewelry, those coarse threads on the end of the barbell have to pass through your piercing when inserted and removed, which is not only extremely uncomfortable, but can also tear and damage the tissue around it. This damage can result in irritation even for healed piercings. Not to mention, these exposed threads can collect and trap bacteria as they pass through your piercing which then remains on the jewelry. External threads are often shorter and rougher which means the threading can easily come undone, or even get stuck together. In the state of Oregon they can’t even legally pierce you with externally threaded jewelry, thanks to extensive documentation that this style is harmful to your piercings and your health. Other cities and states are working on improving their laws in regards to what can and cannot be used for piercing as more and more information arises around quality materials and styles.

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Thread pattern refers to the style of screw that’s used on the jewelry itself for assembly. An external thread is when the screw is on the outside of the barbell, and the ball has a hole in it that the bar then screws into. Internal threading is when the barbell has a hole in the end and the bead has a screw attached to it that screws down into to barbell. There are currently no American made body jewelry companies producing externally threaded jewelry out of body safe, high quality materials; which means, if it has external threading, there’s a good chance it’s a low quality material.It’s important to note that there are high end companies that produce internally threaded pieces in materials like gold and implant grade steel (ASTM F138) that are safe for some to wear, but even implant grade steel contains trace amounts of nickel and unless it’s specified otherwise, so do the majority of gold alloys. For those who are very sensitive to to nickel, you may still react to those pieces. Also notable is the fact that there are low end companies who have started producing internally threaded mystery metal pieces, that despite their thread pattern, are not safe. This means that not every internally threaded piece is safe for everyone, and although thread pattern is a good starting distinguisher, it’s still always recommended to ask questions about what materials are being used and do your research before buying!

This chart shows the diameters of letter gauge drills size A (the smallest) to size Z (the largest).

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Rockwell hardness testing is a standard method for determining the  hardness of metals and polymers. Rockwell hardness is measured with a device known as a Rockwell hardness tester. The tougher the steel is, the higher the number on the RC scale. The higher the RC number, the slower the drill speed should be.

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Drill through-hardened steel metal at the recommended speed using a drill bit, preferably carbide bits. Larger drill bits require even slower speeds.

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If you've worked with hardened steel before, you'll know that a regular drill bit won't cut through. Your best bet is to use the carbide bits because they are the hardest drill bits available.

However, it would be best to exercise caution when using carbide-tipped drills since they can be brittle despite being the hardest. Because of their great strength, they are extensively employed in industrial applications. They can cut through concrete, masonry, tile, and hardened steel.

“There’s no way I could be reacting badly to my jewelry. I paid a lot of money for this piece and my piercer promised it was totally safe!” Unfortunately, we see this same scenario unfold again and again. Something thought to be safe because it’s advertised or sold as “surgical” or “solid”, ends up containing sensitizers like nickel that cause irritation. So how do you, as a consumer, protect yourself from buying low quality jewelry? Well, there are a few different ways to tell what material a piece is made out of, but thread pattern is the number one dead giveaway for most.

Measure and mark the hole, then use a center punch and hammer to make a slight indentation. Drill bits tend to wander when they first start drilling. Therefore the dimple helps the drill bit become more steady. The dimple also serves as a reference for where to drill your hole.

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When drilling through hardened steel, you must ensure that your drill bit is made from tougher materials. Carbide bits are the strongest drill bits material and can cut through hardened steel. But if they are not available, titanium and cobalt drill bits can also be used. However, drilling with either of these bits will take longer than drilling with a carbide drill bit.

Carbide drill bits are typically harder than cobalt drill bits, although both are suitable for drilling stainless steel and other hard metals. However, Carbide drill bits retain their sharpness for a longer period than cobalt drill bits. They can also be utilized at a faster cutting rate and withstand higher temperatures than cobalt drill bits.

If you are short on time, the best drill bits for hardened steel are carbide-tipped bits. They are the most suitable drill bits for hardened steel due to their robust and heat-resistant properties. However, there are other options such as titanium and cobalt.

Jun 19, 2018 — Stainless steels are notorious end mill assassins, so dialing in your speeds and feeds and selecting the proper tool is essential for machining success.

For better protection, use safety glasses that wrap around the sides of your face. Eye protection is required to ensure that a tiny metal fragment does not cause significant eye injury.

2024522 — Understanding the machining process: Lathe vs Mill. Machining utilizes two main tools namely lathe and milling machine, which are specialized ...

Carbide drill bits are used for drilling broken bolts, safes, studs, bearing races, taps, and knives made from hardened steel. They are designed to allow the quick dissipation of heat and prevent chipping.

Recommended feeds of Various Diameter Drills, Recommended speeds for standard materials with HSS Drills.

Hardened steel types include ATS34, CPM440V, Z60CDV14,  Sandvic, and 12C27. Carbon steel must go through a succession of heat treatments, quenching, and reheating to become hardened steel.

In computing for the RPM, for example 1"-diameter tool must run at 30 sfm. Based on the equation above, at 30  sfm: (30 × 3.82) ÷ 1 = 114.6, this means you have to use 115 RPM to drill a 1 inch Rockwell C 40 to 45 steel.

Cobalt drill bits are not made of pure cobalt. Instead, they are made of steel combined with a small proportion of cobalt, often between 5 and 7 percent, and the remaining part steel.

Titanium nitride (TiN) is a very strong ceramic substance that protects the steel bit and allows it to last longer, especially when drilling hardened steel.

In recent years we have seen a rise in companies and studios lying to their clients about materials and threading. It’s unfortunate but it’s why we feel so strongly about educating others so no one gets taken advantage of. Essentially, If you see external threading, it’s easy to know that the jewelry is unsafe and to stay away. Now, how can you distinguish quality internal threading from bad internal threading? Good quality internally threaded jewelry should be made of implant grade materials. It should have a mirror polish on the barbell (meaning you should be able to see your reflection in the piece) and it shouldn’t have any knicks, scratches, or tool marks on the barbell or beads. Quality materials come with American mill certificates, that state that the material is implant grade titanium (ASTM-F136) or implant grade steel (ASTM F138) . Your piercer should have those certificates on hand and should be able to provide them as necessary. However, some jewelry companies have been caught fabricating these certificates, or getting them from countries with very lax standards; because of this, it’s best to stick with reputable brands and studios who you trust to be using the correct materials.

There are many other things to consider when choosing the right drill bit for hardened steel. This post will cover what you need to know about drilling hardened steel and provide you with some suggestions on the best drill bits that will work well for your needs.

When comparing the carbide, both cobalt and titanium drill bits are better than regular steel drill bits due to their added components, as well as their resistance to heat and wear. However, in terms of hardness and longevity, the carbide drill bit is better than both of them.

The machine motion that causes the cutting tool to cut deep into or along the surface of the workpiece is called the feed rate. When cutting metal, feeds are ...

The drill speed is critical for drilling hardened steel. Drilling at high speeds causes high temperatures, which will damage your drill bit. Therefore, drilling hardened steel should be done at a low RPM and feed rate. Feed rates are typically at least 50% lower than for lesser hardness steel. Speeds generally are 30% of that of a non-hardened material.

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