You held the bow, looked at all the unfamiliar pieces, and felt overwhelmed. That’s normal. The bow has six main parts—the stick, the hair, the frog, the screw, the winding and grip, and the tip—and each one does a simple, logical job. Once that logic clicks, every movement you make will start to feel less like guesswork and more like something you can predict and control. The guide below is built to get you there, step by patient step.
The Parts at a Glance: A Quick Reference
- The stick is the bow’s backbone, providing spring and weight.
- The horsehair grips the string, producing sound when rosined.
- The frog holds the hair at the lower end and slides to adjust tension.
- The screw tightens or loosens the hair by moving the frog.
- The winding and leather grip create a comfortable, non-slip place for your thumb.
- The tip at the far end balances the bow and controls bounce.
How Each Bow Part Works (And Why It Matters)
The Stick: Your Bow’s Flexible Backbone
The stick is the long, slightly curved shaft that runs from frog to tip. Its most important job is to give the bow stiffness and the ability to spring back after it bends. That spring lets you draw out smooth, connected notes and execute crisp short strokes. Without the stick’s flex, the bow feels lifeless. Wood sticks (usually pernambuco or brazilwood) deliver a warm, nuanced response; carbon fiber sticks are rugged and won’t warp with changing humidity. Both make the same spring action possible, so you can rely on the stick’s job no matter which material you choose.
Horsehair: The Grip That Makes Sound Possible
The hair is the flat ribbon of pale strands stretched between the tip and frog. It is the only part that touches the string. By itself, hair is slick—rosin gives it the tack it needs to catch the string and pull it, setting off vibration. Without rosin, you’d get a whisper, not a tone. Real horsehair has microscopic scales that hold rosin well, but those scales wear down over time. When the hair stops gripping reliably even after a fresh rosin application, it is time for a rehair.
Frog: The Movable Anchor for Hair Tension
The frog is the carved block at the lower end of the bow. It anchors the hair and slides forward or backward along the stick when you turn the screw. Inside, the frog holds the ferrule—a metal band that spreads the hair into an even ribbon—and the slide, which covers the hair knot. The heel (the curved part that touches your hand) gives you leverage. When you tighten the hair, the frog moves toward the tip, pulling the ribbon taut. That movement is the whole tension system, and it is simple enough to check every time you play.
Screw (Button): How You Tighten and Loosen the Hair
The screw is the metal knob at the very end of the bow. Turning it clockwise tightens the hair; counterclockwise loosens it. Tighter hair gives a quick, bright response for loud passages or detached strokes. Looser hair produces a warmer, softer tone and places less strain on the stick. The most important habit, though, is to loosen the hair fully after every practice session. That releases tension from the stick so it keeps its intended curve.
Winding and Leather Grip: Where Your Thumb Rests
Just above the frog, you will see a section wrapped in silver or wire and, often, a thin leather strip. Together, they form the grip. Their main job is to give your thumb a stable, non-slip surface. The winding also adds a small amount of weight in that spot, shifting the bow’s balance point closer to your hand. Without the winding, the bow can feel tip-heavy and unwieldy—especially for a beginner still building hand stability.
Tip: The Lightweight End That Balances the Bow
The tip is the pointed plate (often ivory or plastic) at the far end of the bow. It secures the hair and acts as a counterweight to the frog. A well-made tip helps the bow feel evenly weighted from frog to tip, so your strokes stay consistent no matter where you play on the bow. It is intentionally light because too much mass at the tip would make the bow sluggish and hard to lift for off-the-string strokes.
Questions Beginners Ask About Bow Parts
Why is it called a frog?
The name likely comes from the old English “frock” or the German “frosch,” both referring to a small, flat device. It has nothing to do with the amphibian. It is simply a historical label that has stayed with the instrument.
Does the bow material (wood vs. carbon fiber) change how the parts work?
The parts themselves function the same way. The stick’s material influences weight, flexibility, and resonance, but the frog, screw, winding, and hair do identical jobs in either bow. A carbon fiber stick tends to be lighter and immune to humidity warping; a good wood stick offers a wider palette of tonal colors. The key is that all the individual parts you are learning still behave predictably.
How often should I rehair my bow?
When the hair looks thin, breaks frequently, or refuses to hold rosin even after a careful application, it is time to see a luthier. For a student playing daily, that may be every six to twelve months. Heavy performers rehair more often. A quick visual check gives a clear answer.
What happens if I tighten the hair too much?
The stick can lose its concave curve—it may straighten or even bend backward. This permanently damages the bow’s camber. As a practical rule, stop tightening as soon as you can slide a pencil between the hair and the stick at the middle.
How to Confirm You’ve Got It
- Point to each part on your bow without any help and describe its job in one simple sentence.
- Turn the screw clockwise and watch the frog slide toward the tip; turn it counterclockwise to see it relax back.
- Place your thumb on the winding and notice how it stays in place better than on bare wood.
- Balance the bow on your index finger at the winding—feel how the tip’s light weight keeps things level.
- Rosin the hair lightly, then draw it across a string. The immediate grip and sound tell you the hair and rosin are working.
When Things Go Wrong: Common Mix-Ups and Quick Fixes
You’ve swapped the names “frog” and “screw” again
Picture this: the screw is the very end knob you twist with your fingers. The frog is the block that moves when you twist. Screw = the driver; frog = the part that travels. If you forget in the moment, just look at the end of the bow and find the part that turns.
The bow won’t make a sound even when you draw it
Nearly always, this means the hair lacks rosin. Hold the hair up to light—if it looks smooth and glossy, rosin it. A freshly rosined bow shows a chalky white deposit and feels slightly tacky to the touch.
You’re not sure where your thumb should go
Without looking, feel for the textured section above the frog—that is the winding. Your thumb rests there naturally, or in the small gap just behind it against the leather grip. If your thumb slides, you are on bare wood; adjust until you feel the grip.
The bow feels heavy and hard to control at the tip
First, check that you are holding the bow near the winding area, not too far up. The winding and frog together center the balance point close to your hand. Also, if the hair is too loose, the stick loses its spring, which makes tip control harder.
Now that each part has a clear job in your mind, the next step is to place your hand on the bow and find a relaxed hold that uses those parts naturally. Begin with a simple bow hold exercise—keep your thumb light and your fingers curved—and notice how the winding, frog, and stick feel under your hand. That awareness is the first bridge from knowing to doing.
