Perfection Planetary Geared Violin Peg Set
Perfection Planetary Geared Violin Peg Set
Perfection Planetary Geared Violin Peg Set
Perfection Planetary Geared Violin Peg Set
Perfection Planetary Geared Violin Peg Set
Perfection Planetary Geared Violin Peg Set
Perfection Planetary Geared Violin Peg Set
Perfection Planetary Geared Violin Peg Set
Perfection Planetary Geared Violin Peg Set
Perfection Planetary Geared Violin Peg Set


Perfection Planetary Geared Violin Peg Set

Sale price$148.99
33 reviews   |  
SKU: PG180C?1A2








Review Videos

Knilling's Perfection Planetary Geared Peg is an innovative tuning peg providing a fine tune and “non-slip” solution for your violin, viola or cello. The 4:1 gear reduction gives the Perfection peg the precision to act as its own finetuner.

Perfection peg operation

Turning the head of a Perfection peg rotates its main central sun gear. Three planet gears are held between the sun gear and an outerring gear. As the sun gear turns the planet gears orbit around it. The motion of the planet gears rotates the shaft, which then takes up the string. The shaft turns once for every four turns of the head. The 4:1 gear reduction gives the Perfection peg the precision to act as its own finetuner.

When tuning: pressing the head of a Perfection peg inwards as you turn it stiffens the action in a gradual and crontrollable way, and this allows the peg to hold the string at tension. Like applying the brakes of a car or a bicycle: as you press the brakes you gradually slow down, come to a stop and then are locked in position by the brakes. The reverse happens when the peg head is gently pulled outward as it is turned: the action of the peg is released, becomes softer and the string is able to unwind.

To get a feel for how the pegs work: for each peg, back the peg off a couple of turns to release the string tension and several times work the head backwards and forwards a half turn each way as you applay a gentle inward pressure to the head. Do the same thing while gently pulling outwards on the head. As you try this you quickly discover how to adjust the peg for ease of turning and optimal hold. In practice, you find a setting that works for you and tend to leave it at that point.

If at some stage you find that the string is not holding, gently apply more inward pressure as you turn and this will firm the action. Conversely, if the peg becomes difficult to turn, gently pull the peg head away from the peg box as you turn and you will feel the action become easier.

Technical Specification

Shape, weight & taper

Perfection pegs have a standard taper and fit in the same holes as standard wooden friction pegs. They have the same shape, weight and taper as a set of good ebony pegs.


The head of a Perfection peg is made either of ebony, rosewood, or ABS synthetic (the plastic often used in car bumpers). The head is attached to the central sun gear.


The section just below the head is the shank, which is made of aircraft-grade aluminium, turned, polished and anodized. When the peg is installed the shank is fixed in the peg box and remains stationary.

Planetary gears

Concealed in the shank is a set of planetary gears that are built into and around the central shaft, and the brake which holds the gears in position against the tension of the strings. The gears are fashioned from the same toughened steel used for helicopter rotor-shafts. They are immensely strong and give the pegs their accuracy and control. They are permanently sealed, and lubricated with the grease commonly used for binocular focus assemblies.


The shaft sits below the shank and is made of anodised aluminium and Delrin industrial nylon. It's the part with the string hole through the middle. The shaft is driven by the gears and turns as the head is turned.

See the Perfection pegs planetary gear diagram

Measuring & selecting pegs

Perfection pegs are available in a range of shank diameters to suit different instruments and peg hole sizes.

Taking measurements

To ensure a good fit all instruments should be measured before you place an order.

Measurements should be made at the point where the peg enters the peg box on the peg head side (your luthier would make these measurements before ordering and fitting the pegs).

  • Measure the diameter of all the peg holes
    • To make an exact measurement of the pegholes, remove the pegs and measure the diameter of the holes.
    • For a good approximate measurement leave the pegs in place, use a set of calipers to measure the diameter of the existing pegs.
  • Select the Perfection peg that is just larger than the largest peg hole
  • Newer instruments usually suit the smaller Perfection pegs.
  • Older instruments will often have larger peg holes and will need the larger pegs.

We recommend installation by a professional. Before placing your order, we recommend looking at the sizing chart for proper sizing.

Customer Reviews

Customer Reviews
5.0 Based on 33 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Steve M.
United States United States

Perfection pegs

Fantastic experience I’ve been encouraging my customers to use them for years I’m a school trained luthier and in the business for 35 years. I wish more overall vendors of violins would equip their instruments with them And now that perfection pegs are available in all the instrument sizes I’m not sure what they’re waiting for? The overall cost shouldn’t be a problem The hardest thing for new players is tuning Let’s make it super easy for them to have success I like recommending your company for purchase of this product My shop is more about repair and restoration so I don’t really sell things and it nice I can recommend your company Keep up the good work Cheers Steve/violinguy

travis p.
United States United States

Perfection pegs

Didn't regret this purchase at all. They were relatively easy to install. They really improved tuning stability. My daughter loves them.

Michele W.
United States United States


Love these, they make tuning easy. Stabilizes the strings so unless the humidity really changes I do not have to adjust the strings at all. Fiddlershop did an excellent job installing and my violin was returned to me within a week.

United States United States

Perfection Planetary Pegs

The Fiddlershop guy worked with me to get the size that I needed. Excellent customer service! This is the second set of “Planetary Pegs” that I’ve purchased and installed. They work great. I do think that they changed the sound of my old Stainer (copy) violin. It’s about five to ten percent less resonant (loud). I was aware that this might happen as I had read about it in at least one Fiddle forum.

robin s.
United States United States

Rosewood Hill Style as ordered

Awesome! Once USPS finally got the order here. Stuff happens! Self install, using 18.00 dollar 1:30 reamer off amazon, scary! I made a home made peg box out of maple from Home Depot, 6 bucks, to practice and test the reamer on, as I was installing on my Holstein Bench Lord Wilton. I took my time and was very careful. 2- E and G, glued with original Gorilla Glue per instructions as they unthreaded when tensioning the peg to get it to hold and not unwind, the other 2 were fine without glue. All installed per design and instructions. The E peg isn’t as smooth turning as the other but works just the same. At first I thought it might be defective but now am thinking that due to the higher tension it just requires a little more inward pressure. Currently is working as designed and holds. I eliminated the tail piece fine tuner, not wanted nor needed. I changed the tail piece, chin rest and end button so they were all rosewood. The tone in both my and my wife’s opinion if anything, is better, clearer more resonant, for what it’s worth. I was concerned that changing would hurt the sound, but it did not. The appearance compliments the tail piece, chin rest and end button all in Rosewood. I love how easy and accurate they are to tune. Very happy that I made the change!! Reliability and longevity is still unknown. My disclaimer - it would be very easy to mess up without the correct size reamer and due diligence, be ware!!! Thanks Fiddlershop!

Fiddlershop founders, Michael Holstein and Pierre Holstein, posing in the Fiddlershop workshop with some of their favorite violin and violas for some of the best workshops

About Fiddlershop

Fiddlershop is a small family-owned business located in South Florida. Since 2012 we have been serving the string community with quality instruments and accessories. We believe that music and instruments should be accessible to everyone at a price they can afford.

Safe Delivery

Free shipping when you spend over $35. We always guarantee safe delivery to your door.