When you first receive your violin bow, the hair will probably be touching the stick. You have to tighten the violin bow which forces the hair to stretch and move away from the stick in order to play. But a common question when it comes to learning how to tighten the violin bow is “how MUCH do I tighten the violin bow?”

Well, it depends.

When you are just beginning, you can learn to tighten the violin bow by sight. But as you become more comfortable playing, you will learn to tighten the violin bow based on feel.

When you are finished playing, you will want to loosen the hair on your violin bow to release the tension.

But first let’s talk about the mechanics of tightening and loosening a violin bow.

How to Tighten a Violin Bow

Hold the violin bow horizontally in front of you with the frog to the right. You’ll notice a silver screw at the very end of the frog. Turn the screw away from you and watch the middle of the bow. You’ll begin to see the bow hair moving away from the stick.

Also notice the frog. Do you see how the frog moves as well when tightening the violin bow? The more you tighten, the more space is created between the tip of the frog and the leather grip. This is the place where your thumb goes so if you find there’s not enough space for your thumb, tighten the bow a little more.

Notice how Tightening the bow changes the space between the frog and the leather grip

the looser the bow, the less space between the frog and the leather grip

The Rule for Tightening the Violin Bow

Eventually, you will tighten the bow based on sight and feel, but if you are a beginner here is a rule for tightening your violin bow by sight.

Notice the stick of the violin bow is curved with the stick dipping down towards the middle slightly.

To tell how much to tighten your bow, turn the screw until you can fit your pinky in between the violin stick and the hair at the middle of the bow.

Watch the middle of the bow as you tighten and continue turning the screw until you could fit your pinky in between the stick and the hair in the middle of the bow. You have to look at the middle of the bow because if you look at the ends, you will see the hair is further away from the stick. Use the middle as your gauge.

Now, the “pinky” rule is a good place to start. However, I notice that most people don’t tighten the bow enough when using this rule. So tighten the violin bow so that your pinky with a little bit of space on either side can fit in between the stick and the hair.

Tighten the bow until you can fit your pinky in between the hair and the stick in the middle of the bow

What Happens if You Tighten a Violin Bow Too Much?

Can you over tighten a violin bow? Yes! Over tightening a bow can damage the bow. When you over tighten the bow, the stick will be very straight without any of that natural curve. All that extra tension can warp or break the stick. You’ll also over stretch your hair which means you will have to continue over tightening your bow just to get to a “normal” tightness because the hair is too loose. You’ll have to get the bow rehaired sooner rather than later.

Over tightening the bow also makes it harder to play. The bow is too stiff when the hair is too tight resulting in unwanted bounces and scratches. The bow will be harder to control when the hair is too tight.

Can You Play if Your Violin Bow Hair is Too Loose?

When people learn that over tightening the violin bow can damage that expensive wooden stick, they tend to under tighten the bow.

While under tightening the bow will not damage it, it will make it harder to play. When the violin bow is too loose there is no resistance. You need a little give in the hair to be able to apply and release weight to get a good tone.

Just like Goldilocks, it’s all about getting it just right and that comes down to learning to tighten the violin bow based on feel.

How to Tighten the Violin Bow by Feel

Eventually, you will be able to feel if your violin bow is too tight or too loose as you play violin. The best way to learn to do this is to experiment. Try barely tightening your violin bow and then play something. You’ll notice there is no resistance or “give” in the violin bow. You can’t apply any weight into the string.

Now try slightly over tightening the violin bow (don’t worry, this will just be for a second). Play something now. Notice how the violin bow is too stiff and also looses some of its resistance and give. The bow is probably so stiff when it is overtightened that it is much easier to bounce the bow and get unwanted bounces.

Loosen the bow until you feel the correct amount of resistance.

How Much Do I Loosen the Violin Bow

When you are finished playing, you will want to loosen the hair on the violin bow. This will your hair to last longer and reduce the tension on the stick. But how much do you loosen the violin bow?

Most people tend to loosen the bow too much when they are finished playing. Simply loosen the screw until the hair is just touching the stick. That’s it! You can put your violin bow to bed now!

The correct amount to tighten the violin bow

The Correct amount to loosen the Violin Bow

Do I have to loosen the bow every time I finish playing?

If you’re just taking a short break, it’s fine to leave the violin bow hair tight. If you’re taking a longer break or if you are done for the day, it’s best to go ahead and loosen the bow hair.

What happens if you loosen the bow too much?

The hair will get very loose and floppy and eventually you will unscrew the screw completely. Don’t worry! You didn’t break your violin bow. Simply reinsert the screw and tighten it again. You may notice when you loosen your violin bow too much, the screw detaches and the frog detaches as well. Again, you didn’t break your bow. Reinsert the frog into the hole where it was attached, reinsert the screw and tighten.

if you loosen the bow too much, the screw may come out

and the frog may detach! don’t worry, reinsert the frog and the screw, retighten, and you’re good to go!

I forgot to loosen my bow hair! Is it okay?

That moment when you realize you forgot to loosen your bow hair last night

You close up your violin case and completely forget to loosen the bow hair. When you open up your case the next day, to your horror you see the violin bow is already tight! EEK! Is the bow damaged? Did you ruin that expensive stick?

Don’t worry, this happens to all of us at some time (sometimes multiple times…) Repeatedly forgetting to loosen the bow hair will not necessarily damage the bow, but you will have to rehair the bow sooner as the hair is getting stretched out more and more.

Can I replace the hair on my violin bow?

Yes, you can and you should! The bow hair wears out eventually and looses its “grippiness.” No matter how much rosin you apply, the bow will feel like it’s slipping across the strings. Simply take your bow to a local string shop or luthier and have them rehair the bow. This will cost anywhere from around $70 and up depending on your location.

You should rehair your bow at least once a year. Rehair your bow every 3-4 months if you play more regularly (2 hours a day and up).

Does weather and humidity affect violin bow hair?

Absolutely. Humid weather will make the violin bow hair stretch and lengthen, making it harder to get the correct amount of tension. You will tighten and tighten and tighten the screw and eventually the hair will have the correct amount of tension. The danger occurs if the humidity changes and turns drier, then the hair will constrict and your violin bow will be too tight.

This is particularly a problem when playing outside or going in between playing outside and inside. Keep an eye on the humidity and try to keep the humidity around 40%-60%.

Why won’t my violin bow tighten?

Hight humidity can make it harder to tighten the bow. If the bow hair is old, or if the bow hair has been overstretched, it will be hard to tighten the bow. Getting a bow rehair will fix this problem.

Sometimes there may be an issue with the screw. Cheap violins that come with cheap bows can often be difficult if not impossible to tighten due to the inferiority of the parts. If you’re playing a a very cheap bow (Under $50) and you’re violin bow won’t tighten, you may need to upgrade to a better bow.

I hope this helps you with all your questions when it comes to tightening and loosening the violin bow. If I didn’t cover something, let me know in the comments below.

Happy Practicing!