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Probably one of the most common accidents with a knife is dropping the knife. This can result in different types of damage to the knife, many of which can be minor and inconsequential. However, it can happen that the knife falls and hits the ground tip first that the tip becomes bent. Is this damage repairable on the knife? Can you fix a bent knife tip?
Tips to fix a bent knife tip.
- Hammer the tip straight with a brass hammer.
- Clamp the knife between wood blocks.
- Clamp the knife between steel plates.
- Heat the knife and clamp it between steel plates
If these fail, you may need to re-profile the tip and grind out the bend.
The way to try and fix a bent knife tip will depend on how severe the bend is, the type of knife, and the tools you have at your disposal to effect the repair.
The severity of the bend will determine whether the bend can be fixed with basic measures or whether more drastic action is necessary. There are also a few dangers associated with trying to fix a bent knife tip.
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How To Fix A Bent Knife Tip
Accidentally dropping your knife and putting a bend in the tip is probably one of the most frustrating events that can happen for a knife owner, especially if it is your favorite knife!
Don’t be too hasty to discard the knife and relegate it to the back of the cutlery draw; there are some strategies you can use to try and repair the damage to the knife.
A word of warning is necessary, however, since the repair attempts do not always go according to plan, and in some instances, you may need to resort to more drastic measures to make the knife serviceable again.
The Dangers Of Trying To Straighten A Bent Knife Tip
When a knife is dropped, or the knife was used to try and pry something open, and the tip gets bent, enormous stresses have been placed on the steel in the area of the tip of the knife.
In some instances, micro-fractures will have developed along the area of the bend. This is often the case if the bend is severe and really close to the tip.
If this is what has happened to your knife, then you need to proceed carefully since trying to straighten out the tip of the knife may cause it to break off.
Should the tip break off, do not despair; you can still salvage the knife. Take a look at the section of this article about what to do if a bent knife tip cannot be straightened.
Methods Of Fixing A Bent knife Tip
In an attempt to try and straighten out the bent tip of the knife, you can explore trying out the methods we recommend.
We will start out with methods that are easiest and the simplest and work our way to methods that are a little more complex for stubborn bends and which may require some specialized tools to get the job done.
Use A Hammer To Straighten The Tip
Most people would think of this as their first option to try to fix the bent tip of their knife. Your choice of the hammer, however, needs to be selective. A normal hammer will work, but it could damage the finish of the knife at the same time.
Rather try to use an acrylic hammer or a brass hammer first to try to hammer the bend out. Place the knife blade on a hard, flat surface such as a granite slab or a piece of steel.
You may want to place a thin piece of cardboard under the knife blade to protect it from being scratched on the rock or metal surface.
Gently tap the bend in the knife to try to straighten it out. If the hammers you are using do not have the required weight or power to get the bend out, you can try a normal steel hammer, but cover the face of the hammer with a piece of thin leather to protect the finish on the knife.
TIP: Many people use magnets as holders for their knives. But what if your knives can be damaged by magnets? Find out more about using magnets as holders for your knives in the article below:
Clamp The Knife Tip Between Two Pieces Of Wood
Try to clamp the bent part of the tip of the knife between two pieces of wood. You can use a clamp or a bench vise to gradually apply pressure to the wood and try to press the tip of the knife back into the correct shape.
If you have some pieces of hardwood, they would be a better type of wood to use than a piece of softwood such as pine.
This method will only work if the bend in the knife tip is not too severe. If the bend is bad, the bent tip will not straighten out when pressure is applied to the wood. The bent part will simply dig into the wood and will not straighten out.
Clamp The Knife Between Two Steel Plates
Another method that you can try to get the bend out of the tip of the knife is to clamp the blade of the knife between two pieces of flat steel.
The steel can be clamped with normal G-clamps, or you can put the steel with the knife sandwiched in the middle into a bench vise. You can then exert a controlled amount of pressure on the bent tip to try and get it to straighten out.
You cannot use a spring clamp for this method since the spring clamp cannot apply sufficient pressure against the bend to get it to straighten.
Heat The Bent Knife Tip
The final method that you can try to unbend the knife tip before you go on to more drastic measures is to use the previous methods in combination with providing some heat to the tip of the knife.
This process must be attempted with much caution since the heat applied to the blade can ruin the heat treatment and temper of the blade. If done incorrectly, it could anneal the steel and make it too soft to hold an edge, or it could get too hard and become brittle.
Heating up the steel will soften the steel slightly and make it more malleable, which will make it more cooperative when trying to get the bend out of the knife tip without breaking the tip-off.
Heating a knife has many complications and possible side effects that could further damage the knife and the handle material.
The heat can compromise the steel temper and also degrade any adhesives that are used to hold the handle in place.
Heat the steel to a temperature of just over 400F or 205 Celsius. It would be beneficial to aim for a temperature of about 430F or 221 Celsius to give you some leeway to straighten the tip before the knife cools down.
You can use a workshop heat gun as a starting point since the temperature of these guns can get the steel to the right temperature.
You can also use a portable butane blowtorch to heat the tip of the knife, but be careful with this high heat source since it will be easy to overheat the tip of the knife to red hot and ruin the blade.
Once the tip is at the right temperature, you can try method one with the hammer or method three of clamping the blade between two steel plates. The latter would be preferable since it applies even pressure across the surface of the blade.
TIP: Everybody has their own preferred method and tools that they would recommend over others. But did you hear Glass stones made by Shapton Company? We made a comparison between traditional whetstones (Kuromaku) and glass stones. Find out more in the article below:
What To Do If A Bent Knife Tip Cannot Be Straightened?
In some cases, the tip of the knife will not be able to be straightened, or it would have broken off completely. What other action can you take when your knife is in this condition?
The only action you can take here is to re-profile the tip of the knife. Basically, you will be grinding away the bent tip of the knife and creating a new tip.
You can do this with a belt grinder if you have one, but you can also achieve this with simpler tools if you don’t have a belt grinder.
You can use a Dremel tool, a disc grinder, or even a course whetstone and a good dose of patience. The new tip can then be finished off with some high grit sandpaper and then re-sharpened.
You will need to pay attention and be very careful when using any tool on the knife that will cause the blade to heat up.
Getting the blade too hot will result in the temper of the steel being ruined, and the knife would need to be heat treated and tempered from scratch.
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Our PRO choice whetstones combo (Amazon links):
- Fixing stone: Whetstone SHAPTON Ceramic KUROMAKU #320
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If you are in the unfortunate position to have a knife with a bent tip, you can try the various methods that we have detailed to straighten the tip, but there is no guarantee that any of these straightening methods will return a satisfactory result.
If the knife is expensive or of high sentimental value, it may be worthwhile to find a local custom knifemaker and seek their help to fix the bent knife tip for you.
If the knife is not particularly expensive, then you don’t have much to lose, and you can try our suggested DIY methods to fix the bent tip of your knife.
TIP: Fixing a broken knife tip can be a challenging task. But fixing a broken knife blade can be easier. Check out this step-by-step guide on how to fix a broken knife blade in the article below: