Top 17 How To Drill And Tap Cast Iron 455 People Liked This Answer

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Insert the tip of the tap into the drilled hole. Pour additional cutting fluid along the tap and into the hole. Turn the tap wrench clockwise to start tapping the hole. Twist the tap wrench 1/2 turn counterclockwise if the tap binds in the hole.Threaded holes in cast iron machine tables are just the solution you need for holding jigs and fixtures. George Vondriska shows how to cut a threaded through or blind hole in cast iron with a center punch, drill, tap and die set, a little oil drill and an all important back and forth motion.Cobalt steel is harder and tougher than high-speed steel, so it helps increase tool life and it can be used to tap tougher metals such as cast iron, nickel alloys, austenitic stainless, and aircraft alloys. The round shank with square end makes this tap suitable for hand or power-driven applications.

Can u drill and tap cast iron?

Threaded holes in cast iron machine tables are just the solution you need for holding jigs and fixtures. George Vondriska shows how to cut a threaded through or blind hole in cast iron with a center punch, drill, tap and die set, a little oil drill and an all important back and forth motion.

What kind of Tap do you use for cast iron?

Cobalt steel is harder and tougher than high-speed steel, so it helps increase tool life and it can be used to tap tougher metals such as cast iron, nickel alloys, austenitic stainless, and aircraft alloys. The round shank with square end makes this tap suitable for hand or power-driven applications.

How do you drill holes in cast iron?

You can drill a hole through cast iron with any drill bit for metal. Cast iron is much more brittle than other metals and is easy to drill into. Start drilling slowly to prevent overheating and excess friction that can damage your drill bit.

Can you tap cast iron pipe?

Direct service tapping of operating cast and Ductile iron piping systems has been a common practice for more than 100 years. Ductile iron pipe can be readily field cut and tapped to fit normal and emergency situations.

What is the best drill bit for cast iron?

The best drill bit to use for cast iron is a cobalt bit with a 135-degree point angle. The angle is sharper than that on a conventional bit, making drilling faster and more accurate. Cobalt bits are brass-colored. As an alternative, you can also use a gold-colored titanium nitride bit.

Can you use a self tapping screw in cast iron?

Self-tapping screws are good for use with metals, various types of plastics (plywood, fiberglass, polycarbonates), and cast or forged material, like iron, aluminum, brass or bronze.

What is the best material for a tap?

High-speed steel (HSS) has remained a popular tap material for decades because it can maintain its integrity while threading, despite high temperatures and vibration. Various types of high-speed steel exist, but the main “ingredients” include high carbon tool steel, tungsten, chromium, vanadium, and iron.

What is tap casting?

Tapping is the process of cutting a thread inside a hole so that a cap screw or bolt can be threaded into the hole. Also, it is used to make thread on nuts. Tapping can be done on the lathe by power feed or by hand.

Is cobalt or titanium drill bits better?

Cobalt drill bits are more expensive, but offer longer life, and are more resistant to heat than titanium drill bits. Cobalt drill bits are also tougher and can drill holes in the hardest metals.

Can you cut cast iron?

You can cut cast iron with a plasma cutter torch, but this is not the best method to use. If you need to cut cast iron, your best options are to use either a snap cutter or a tool with a diamond blade.

Which is better black oxide or titanium drill bits?

Even though both the drill bits are less prone to friction during drilling, the titanium variety can drill relatively faster. This is owing to the greater strength and toughness of the latter, which facilitates ultimate speed while they are being used on most materials.

What is the difference between a tapping sleeve and a tapping saddle?

Saddle taps – the branch line is connected to a main by a corporation stop that is screwed into a metal saddle that wraps around the pipe. Maximum branch line size is 2-inch. Sleeve taps – the branch line is joined to the main via a connection at a metal sleeve that wraps around the pipe.

What is cobalt drill bit?

What are cobalt drill bits? Cobalt bits are a combination of steel (or another alloy) mixed with a small percentage of cobalt, typically between 5 – 7%. Cobalt has a melting point of 1495°C and a boiling point of 2927°C, which makes it perfect for use at high temperatures.

Is cast iron magnetic?

Most metals with magnetic properties are ferrous: metals and alloys that contain iron. These ferrous metals include mild steel, carbon steel, stainless steel, cast iron, and wrought iron.

Can you drill wrought iron?

Because it is so hard, wrought iron presents a problem for workers attempting to drill at precise positions. Beginning to drill without assistance from clamps can make it difficult to produce a hole that is both straight and on-center. Removing wrought iron fixtures to clamp them to a drill press is the best option.

Can you drill and tap cast aluminum?

Aluminum can be drilled at high speeds while still taking deep cuts. In tapping, the feed rate is specified by the pitch of the tap but typically will run as much as 70% faster than a cut thread tap in steel.

What is cobalt drill bit?

What are cobalt drill bits? Cobalt bits are a combination of steel (or another alloy) mixed with a small percentage of cobalt, typically between 5 – 7%. Cobalt has a melting point of 1495°C and a boiling point of 2927°C, which makes it perfect for use at high temperatures.


Everything you need to know about drilling and tapping holes | DIY
Everything you need to know about drilling and tapping holes | DIY


How to Drill and Tap Cast Iron | It Still Runs

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  • Summary of article content: Articles about How to Drill and Tap Cast Iron | It Still Runs Updating …
  • Most searched keywords: Whether you are looking for How to Drill and Tap Cast Iron | It Still Runs Updating The crystalline structure of cast iron varies depending on the rate the steel was cooled. Cast iron drills differently than other types of steel due to the variations in the steel structure. When drilling rolled steel, the material drilled from the hole will work in a spiral from the tip of the drill bit. Cast iron …
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How to Drill and Tap Cast Iron | It Still Runs
How to Drill and Tap Cast Iron | It Still Runs

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Drilling and Tapping Cast Iron | WoodWorkers Guild of America

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  • Most searched keywords: Whether you are looking for Drilling and Tapping Cast Iron | WoodWorkers Guild of America Updating George Vondriska demonstrates a pain free way to drill through holes in cast iron using a few of the woodworking tools you should have in your workshop.
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Drilling and Tapping Cast Iron | WoodWorkers Guild of America
Drilling and Tapping Cast Iron | WoodWorkers Guild of America

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Can I Drill Through Cast Iron? – ToolsOwner

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  • Summary of article content: Articles about Can I Drill Through Cast Iron? – ToolsOwner Updating …
  • Most searched keywords: Whether you are looking for Can I Drill Through Cast Iron? – ToolsOwner Updating Cast iron is a sturdy metal that’s used in all sorts of applications. If you need to attach something to it or you have to release pressure, you could be
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What Do You Need For Drilling Cast Iron

How to Drill Through Cast Iron

Additional Tips and Advice

Can I Drill Through Cast Iron? - ToolsOwner
Can I Drill Through Cast Iron? – ToolsOwner

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Pipe Features – Tapping | DIPRA

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  • Most searched keywords: Whether you are looking for Pipe Features – Tapping | DIPRA Updating Ductile iron pipe is the pipe material of choice for today’s water and wastewater pipeline infrustructures.
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Tapping

Direct Service Connection Installation Comparison Ductile Iron Pipe vs Polyethylene Pipe

Efficient and Safe

Tapping Ductile Iron Pipe vs PVC

Direct Tapping of Ductile Iron Piping Encased in Polyethylene

Pipe Features - Tapping | DIPRA
Pipe Features – Tapping | DIPRA

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Ignorant on the topic: Can I tap holes into cast iron? [Archive] – Sawmill Creek Woodworking Community

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  • Summary of article content: Articles about Ignorant on the topic: Can I tap holes into cast iron? [Archive] – Sawmill Creek Woodworking Community I want to drill and tap blind holes into cast iron. Specifically, into the main casting on my DC-380 planer. Hole dia is not critical – 1/4″ … …
  • Most searched keywords: Whether you are looking for Ignorant on the topic: Can I tap holes into cast iron? [Archive] – Sawmill Creek Woodworking Community I want to drill and tap blind holes into cast iron. Specifically, into the main casting on my DC-380 planer. Hole dia is not critical – 1/4″ … topic, holes, ignorantI want to drill and tap blind holes into cast iron. Specifically, into the main casting on my DC-380 planer.

    Hole dia is not critical – 1/4″ would be fine. Depth would probably need to be in the 5/8″ to 3/4″ range.

    I have tapped aluminum bar stock before, but clearly this is not the same critter.

    Is there anything I need to know besides lube often, align carefully, don’t force it? Anything in particular about drilling the holes themselves?

    Thanks

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 Ignorant on the topic:  Can I tap holes into cast iron? [Archive]  - Sawmill Creek Woodworking Community
Ignorant on the topic: Can I tap holes into cast iron? [Archive] – Sawmill Creek Woodworking Community

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Tapping cast iron | Home Model Engine Machinist Forum

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  • Summary of article content: Articles about Tapping cast iron | Home Model Engine Machinist Forum First, I always tap cast iron dry, never use flu. Second, I usually try to drill the hole deeper than I plan to tap if possible… …
  • Most searched keywords: Whether you are looking for Tapping cast iron | Home Model Engine Machinist Forum First, I always tap cast iron dry, never use flu. Second, I usually try to drill the hole deeper than I plan to tap if possible… I know that this is probably a FAQ, but how do folks go about tapping smallish holes in cast iron?

    I was tapping 4BA into a casting today, and the tap got…

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Tapping cast iron | Home Model Engine Machinist Forum
Tapping cast iron | Home Model Engine Machinist Forum

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Drilling and Tapping Cast Iron | WoodWorkers Guild of America

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  • Summary of article content: Articles about Drilling and Tapping Cast Iron | WoodWorkers Guild of America Threaded holes in cast iron machine tables are just the solution you need for holding jigs and fixtures. George Vondriska shows how to cut a threaded through or … …
  • Most searched keywords: Whether you are looking for Drilling and Tapping Cast Iron | WoodWorkers Guild of America Threaded holes in cast iron machine tables are just the solution you need for holding jigs and fixtures. George Vondriska shows how to cut a threaded through or … George Vondriska demonstrates a pain free way to drill through holes in cast iron using a few of the woodworking tools you should have in your workshop.
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Drilling and Tapping Cast Iron | WoodWorkers Guild of America
Drilling and Tapping Cast Iron | WoodWorkers Guild of America

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Drilling and tapping cast iron? | YBW Forum

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  • Summary of article content: Articles about Drilling and tapping cast iron? | YBW Forum Drill it dry and at a slow speed (to prevent over heating the cutting tool) and use HSS. drills & taps.Lubricant may be used for tapping ( … …
  • Most searched keywords: Whether you are looking for Drilling and tapping cast iron? | YBW Forum Drill it dry and at a slow speed (to prevent over heating the cutting tool) and use HSS. drills & taps.Lubricant may be used for tapping ( … Hi i need to Drill and tap cast iron?

    how does it compare with Drilling and taping steel?

    softer isn’t it?

    any tips?

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Drilling and tapping cast iron? | YBW Forum
Drilling and tapping cast iron? | YBW Forum

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tapping cast iron – The Home Machinist!

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  • Summary of article content: Articles about tapping cast iron – The Home Machinist! It might be a chore to drill and tap a large hole in cast iron if you have nothing but portable tools to work with. I suggest you locate the … …
  • Most searched keywords: Whether you are looking for tapping cast iron – The Home Machinist! It might be a chore to drill and tap a large hole in cast iron if you have nothing but portable tools to work with. I suggest you locate the …
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tapping cast iron - The Home Machinist!
tapping cast iron – The Home Machinist!

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General – Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist – Largest Manufacturing Technology Forum on the Web

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  • Summary of article content: Articles about General – Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist – Largest Manufacturing Technology Forum on the Web Use the gue to drill the required holes with your hand drill. Put it back in the drill press and drill it for the tap size, tap your holes. …
  • Most searched keywords: Whether you are looking for General – Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist – Largest Manufacturing Technology Forum on the Web Use the gue to drill the required holes with your hand drill. Put it back in the drill press and drill it for the tap size, tap your holes. I need to manually drill and tap several holes in a cast iron surface, but have never done so, and do not know if cast iron requires any unique…
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General - Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist - Largest Manufacturing Technology Forum on the Web
General – Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist – Largest Manufacturing Technology Forum on the Web

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General – Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist – Largest Manufacturing Technology Forum on the Web

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  • Summary of article content: Articles about General – Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist – Largest Manufacturing Technology Forum on the Web ALWAYS use tapping oil/lube for threading, unless you have only a few to do and the tapping flus aren’t available. Then use oil. Cast iron … …
  • Most searched keywords: Whether you are looking for General – Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist – Largest Manufacturing Technology Forum on the Web ALWAYS use tapping oil/lube for threading, unless you have only a few to do and the tapping flus aren’t available. Then use oil. Cast iron … I need to manually drill and tap several holes in a cast iron surface, but have never done so, and do not know if cast iron requires any unique…
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General - Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist - Largest Manufacturing Technology Forum on the Web
General – Archive | Drilling and Tapping by hand in Cast Iron | Practical Machinist – Largest Manufacturing Technology Forum on the Web

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How to Drill and Tap Cast Iron

How to Drill and Tap Cast Iron by C.L. Rease

The crystalline structure of cast iron varies depending on the rate the steel was cooled. Cast iron drills differently than other types of steel due to the variations in the steel structure. When drilling rolled steel, the material drilled from the hole will work in a spiral from the tip of the drill bit. Cast iron emits numerous small chips of metal. Occasional hard spots in the cast iron can break the tip of a drill bit if you apply excessive pressure on the tip of the bit. Tapping a hole drilled in cast iron requires care to avoid breaking taps in the hole when you encounter a hard spot.

Can I Drill Through Cast Iron?

Cast iron is a sturdy metal that’s used in all sorts of applications. If you need to attach something to it or you have to release pressure, you could be worried about breaking a drill bit. However, it’s not as challenging as you might think.

You can drill a hole through cast iron with any drill bit for metal. Cast iron is much more brittle than other metals and is easy to drill into. Start drilling slowly to prevent overheating and excess friction that can damage your drill bit.

Before we get into the guide of how you’re supposed to drill through cast iron properly, let’s check out what items you need.

* This article may contain affiliate links. As an Amazon Associate, I earn from qualifying purchases.

What Do You Need For Drilling Cast Iron?

First and foremost you will need a drill. If you don’t own one go and check my article on top cordless drills.

You can use almost any drill bit to cut through cast iron, including the cheap ones that you find in the discount aisle.

Since cast iron doesn’t resist the twisting motion of a bit, you’ll be able to drill right through it. The only issue that you’ll be dealing with is the debris.

If you want to make the task even more manageable, reach for a black oxide drill bit. They’re durable, and you won’t have tons of metal shavings stuck in the cast iron when you’re done.

You can also try out a cobalt steel drill bit, which provides additional toughness. It’s nearly impossible to break a cobalt steel twist bit on cast iron.

Either of these substances will cut right through the metal without becoming dull too quickly.

You can even take it a step further by getting a drill bit that’s coated with titanium nitride to resist heat and friction. Even if the cast isn’t hot, the friction will build heat quickly. It’s believed that drill bits with a TiN coating last up to six times longer than the average bit.

⭐️ ToolsOwner’s Choice DeWalt Titanium Drill Bits (21 Piece Set) Buy on Amazon (*Amazon Affiliate Link)

It also goes without saying that you should wear safety gear. Pick out a pair of goggles that protect your eyes and ears, as well as your temples. Don’t forget to get a durable pair of work gloves as well. You should pick a pair made out of leather or canvas to prevent slippage and potential harm.

Finally, consider wearing long sleeve clothing. Denim jeans and a work jacket will be more than enough to keep yourself from getting hurt. Even if you’re a professional, safety always comes first.

Alright! Without further ado, let’s jump into the step-by-step guide below.

How to Drill Through Cast Iron

Before you begin drilling, you’ll need to prep all of your tools to cut through the material easily.

Start by applying lubricant to your drill bits before using them. If you’re only drilling one or two holes, you don’t need to worry about lubing them.

However, anything more than that calls for cutting fluid. You can get a small bottle at a good price on Amazon. If you are doing a lot of drilling into metal I recommend you to get the 1 Gallon bottle of cutting fluid. Cutting fluid not only saves your bits but also prevents metal shavings from flying.

Here’s a simple guide to get it all done relatively quickly:

Create a dimple or an indent wherever you intend to drill. It’s always a good idea to mark the location, so you don’t go off course, but the indent also helps to guide the drill bit. Use a center punch and a hammer to make your marks. Attach the correct drill bit to your drill. Always check the size of the hole and make sure that you’re using the corresponding bit. If you’re following the hole with a screw, you need to use a bit that’s slightly small than the screw. The difference will allow the screw to hold onto the leftover metal, creating a secure bond. Brace the cast iron in place if it’s a loose piece. If it’s connected to an immovable object, it’ll already be braced for you. Consider a table vice to hold both sides of the material rather than only one side. Holding the drill upright, begin to slowly pull the trigger and place it against the indent that you created. Don’t be afraid to start with a smaller bit if you’re worried about making a mistake. It’s always better to do it a few times rather than mess the whole thing up. Once you’ve made the hole successfully, hold the trigger down, and slowly pull the drill back and forth in it. This process will deburr the hole, which means that it removes the metal debris that was left behind. Wipe down the surface with a dry cloth, then use a wet cloth, and repeat once more with the dry cloth. Don’t forget to get the inside of the hole, even if it’s thin. Metal debris can cause harm, but it also prevents screws from achieving a secure bond.

That’s all there is to it!

Again, this material never puts up much of an issue. It’s malleable if you use the drill bits mentioned at the beginning of this section.

To finish off, let’s review a few tips to help you get the job done well.

Additional Tips and Advice

Safety is essential, but so is convenience. Fortunately, you can get the best of both worlds by following these suggestions. Give them a try and figure out what gives you the results that you’re searching for.

Feel free to use the extra cutting fluid as you’re drilling. When you’re using a drill bit regularly, it starts to warm up. Wipe away the debris and reapply oil if you’re using it for long periods of time.

When you’re using a drill bit regularly, it starts to warm up. Wipe away the debris and reapply oil if you’re using it for long periods of time. Start with a slow speed setting. More speed = more friction, which means more heat. Slower drilling allows you to go through cast iron without dulling out your bits or over-heating your drill. You should never exceed 3000 RPM, though less than 1000 RPM is doable.

More speed = more friction, which means more heat. Slower drilling allows you to go through cast iron without dulling out your bits or over-heating your drill. You should never exceed 3000 RPM, though less than 1000 RPM is doable. Step bits are handy if you’re trying to drill a large hole. If you use one, make sure that you don’t go too fast; Otherwise, you could bore a hole that’s far too big.

If you use one, make sure that you don’t go too fast; Otherwise, you could bore a hole that’s far too big. Keep an old rag nearby whenever you use a drill bit on any type of metal. You’ll have to wipe up the excess cutting fluid and the metal shavings. Wiping it on your pants or shirt (as many DIYers have done) can cause injuries from the sharp debris.

You’ll have to wipe up the excess cutting fluid and the metal shavings. Wiping it on your pants or shirt (as many DIYers have done) can cause injuries from the sharp debris. Always mark your surface with a permanent marker beforehand . This indicator will give you a clear vision of where you want to start, rather than leaving you to guess where you should drill.

. This indicator will give you a clear vision of where you want to start, rather than leaving you to guess where you should drill. Don’t forget to check the width of the material that you’re drilling into! If you go too far, you could damage anything behind it. Keep a ruler and a leveler in your tool kit at all times to prevent those issues.

If you go too far, you could damage anything behind it. Keep a ruler and a leveler in your tool kit at all times to prevent those issues. Finally, never drill into loose cast iron. Vices are an absolute necessity if it’s not attached to a surface already.

Conclusion

Drilling cast iron is easy. It is a brittle metal that doesn’t have much debris.

The aforementioned heat-resistance and toughness make this material a top contender for at-home projects, so use it and drill into it without worrying about it breaking.

Here are a few key takeaways from this post:

You can drill into cast iron by using any type of drill bit for metal.

Don’t forget to use cutting fluid if you’re drilling many holes.

Always use a clamp or vice when you’re drilling into any surface.

Wear safety goggles, gloves, and clothing.

Remember to mark the spot with a marker followed by a center punch and a hammer.

Start drilling slowly to prevent excess friction, heat, and dulling.

Cheers, tools owners!

Pipe Features – Tapping

Direct service tapping of operating cast and Ductile iron piping systems has been a common practice for more than 100 years. Ductile iron pipe can be readily field cut and tapped to fit normal and emergency situations.

Direct Service Connection Installation Comparison: Ductile Iron Pipe vs. Polyethylene Pipe

This technical publication reports on tests comparing direct tapping of Ductile Iron pipe with sidewall fusion of service connections on polyethylene pipe. Time, internal pressure, material strength, and other factors of both materials were compared with respect to tapping.

So you have finished reading the how to drill and tap cast iron topic article, if you find this article useful, please share it. Thank you very much. See more: how to drill and tap a hole, how to drill and tap aluminum, tapping cast iron manifold, tap and die cast iron, lubricant for tapping cast iron, how to drill and tap a bolt, cast iron drill bits, is cast iron hard to tap

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