Over the last centuries different materials have been used for making yo-yos, specifically yo-yo halves. This page deals with their history and yo-yoing properties. For axle materials see Axles.
Yo-yos were - if we ignore some of the ancient Greek ones made of clay and the traditional Philippine yo-yos made of caribou horn - originally made out of wood. Since yo-yos are usually subjected to lots of physical abuse the woods used are most often hardwoods. For its even density, maple has become the primary choice here. Beech, oak, and cherry are also sometimes used. There are also some more exotic woods such as purple heart, padauk, or wenge that are turned to make yo-yos. These are almost always hand made in small quantities by companies/people like TMBR and Spinworthy.
To add a nice color effect, plywood (spectraply) also is used, each layer dyed differently, looking like a rainbow or creating a two toned stripe pattern. This technique was pioneered by Hummingbird and in more recent years has been used by Jon Gates, TMBR, and Spinworthy.
The vast majority of wood yo-yos are fixed axle and responsive, some people have occasionally made unresponsive wood body yo-yos, often using something like One Drop Cabal guts kit for the bearing seat.
- Abundantly available
- Can be easily turned
- Looks and feels nice
- Uneven density, making a yo-yo often slightly wobbly
- Difficult to process other than by turning. While it is technically possible to machine a starburst into a wooden yo-yo, it is usually not done for reasons of economy.
- Insufficient density for modern yo-yo shapes
Since the advent of thermoplastics (i.e. plastics that can be molded by melting them), these materials have been widely used to make yo-yos.
- Easily molded into nearly any shape
- Easily dyed any color
- Good density
- Has good rotation and stability
- Molding often leaves sharp edges
- Difficult to mold without enclosing gas bubbles
- Dyed (While delrin/POM is usually available in a limited color pallet [white, black, red], it is possible to dye the white version of this material using Rit dye. Some companies have paid to have this done for one or more runs of a particular model but it is possible to DIY.)
- Multicolor composite
Polycarbonate is a very strong plastic used in many injection molded yo-yos. It has high strength to weight ratio and can flex under impact. Many yoyos are made from this plastic due to its ease of use, low cost and existing worldwide manufacturing base. It is often referred to as 'polycarb'. Some examples of polycarbonate yo-yos include the Duncan Freehand series. A large proportion of current YoYoJam models are also polycarbonate. Enyo is a trademarked polycarbonate with suspended holographic foil particles that glimmer strongly in direct sunlight. Clear yo-yos are usually polycarbonate due to the natural clear quality of the plastic along with its high strength/weight ratio. Colored polycarbonate yo-yos are made by adding coloring to the plastic. Sprite trademarked yo-yos often have bubbles in them which is made by adding a powder, often baking soda, to the mix during injection that produces carbon dioxide which expands in the polycarbonate making a bubble. Polycarbonate has some drawbacks when used in the production of yo-yos. It will crack when dimensions are too thin and when exposed to even small amounts of solvents it crazes (surface cracking), becomes brittle and yellows as the solvent degrades the plastic. Some polycarb yoyos have some machining done after they are molded to add fingerspin dimples.
ABS (acrylonitrile butadiene styrene)
ABS is a strong, lightweight and inexpensive plastic used for some yo-yos. It is not rigid enough to be successfully used in places where strength, weight and rigidity are priorites such as standard sized rim-weighted yo-yos. It is used in less expensive yo-yos such as the modern Duncan Wheels (vintage models are polycarbonate and sought after by modders). It lends itself to very well to inexpensive mass produced yo-yos that can have thicker dimensions and do not have rim weighting. It is easily scratched and does not machine well due to a low melting point. Advertising yo-yos are often made from ABS.
Delrin and Celcon are trademarks for nearly identical polyacetal plastics, which are machineable like aluminum. Polyacetal is a lightweight, durable, low wear, and low friction plastic originally developed by Dupont in the 1950s as a metal substitute. It is not as prone to dings or scratches as aluminum while retaining many of the qualities desired in a machineable material. The Silk by Eric Wolff, the Milk by Paul Yath, the Lucha Libre by Throw Down, and the Gung-Fu by Death By Yo-Yo are examples of yo-yos that are made of this material. Some polyacetal yo-yos, such as those already mentioned, are machined like metal yo-yos while others, such as the Lyn Fury and the KickSide, are injection molded from Celcon. Polyacetal has also been used in the hubstacks of YoYoFactory yo-yos, such as the G5. There have been some versions of other plastic yoyos that have had a POM/Delrin version, such as the MagicYoYo Skyva and TopYo Mojo.
Heavy Gravity is a composite material used by YoYoJam, made by saturating plastic with metal powder either before or during the injection molding process. It is much more dense than plastics typically used in yo-yo manufacture. Because of this, it allows for rim weighting at a cheaper price than with metal rims, since it is produced by injection molding rather than machining. It also allows greater flexing versus metal, which likely reduced stresses in other parts of the yo-yo during impacts. Heavy Gravity was used in the production of the SpinFaktor HG, Black Gold, the Copperhead series, SpinFaktor HG Xtra, Triple Jam, Relic, Matador, and the K-OS series. Eventually, changing costs rendered the material too expensive without substantially altering the retail price, so production of yo-yos with Heavy Gravity has ceased after the K-OS Extreme.
The G Squared Ghost was machined from teflon but it was eventually discontinued partly because it was difficult to securely mount the hub in the body.
While other metals have been used to add rim weight to yo-yos, none was so often used as aluminum. Ever since Tom Kuhn made his first Silver Bullet, yo-yos made of aluminum have been successful in production.
- Slightly more dense than most plastics (and won't have air bubbles like some plastics resulting in smoother play)
- Usually smoother and has less friction than plastic giving better grinds (varies depending on the finish applied to the metal)
- Anodization allows many different colors to be made
- Susceptible to corrosion
- Expensive compared with plastic alternatives
- It is easy to get dings or scratches if it makes contact with rough surfaces
- Resonates easily, resulting in an annoying ringing sound during play
Types of Finishes Found on Aluminium (and some other metal) Yo-yos
- Sand Blasted (same as blasted?)
- Diamond Blasted (G Squared proprietary finish?)
- Pyramatte finish (One Drop finish that uses tetrahedral beads in the tumbling process)
- Raw (no ano, usually polished but sometimes brushed)
Types of Colorways Often Found on Aluminium Yo-yos
- Clear (no dye)
- Solid color
- Acid Wash
- Combo of these
- Metal Plated (electroplating process, these usually start fairly glossy but pick up a patina with use)
- Nickel (most common, frequently produced by One Drop.)
- Rhodium (rose gold color, very uncommon. YoYoFactory 66% 888)
- Powdercoated (this is often not considered ideal because the process of powdercoating is more likely to unbalance the yo-yo, but because there is no white dye that is small enough to be used in anodization, powdercoating and painting are the two ways used to get pure white yo-yos. There are some other effects that can be achieved with this technique, such as glow in the dark.)
- Painted (this is rare outside of a few people/companies or custom jobs. Oh Yes Yo is one company that has frequently offered hand painted metal yo-yos, usually with macabre themes.)
Types of Aluminium Alloy typically used
- 6061 (probably the most common/typical/cheapest, maybe the same as 6082 used by ILYY in Europe)
- 7075 (more expensive but higher density and more difficult to ding, allows for thinner walls and some weight redistribution compared to 6061)
- 7068 (even higher density but rarely seen)
Titanium is a relatively rare yo-yo material because its cost makes the yo-yo's retail price prohibitive, and it is significantly more difficult to machine. Usually, titanium is only used in a small quantity, for example, for the weight rings in yo-yos such as the YoYoJam Night Moves and YoYoFactory Catch 22, or for the axle, such as the Oxygene Oxy3, Oxygene Oxy4, Oxygene Oxy 3vo, Oxygene Oxy 5, and the Oxygene Oxy "6" (small prototype run released in early 2011 in Europe).
However, the relative number of titanium yo-yos since the year 2000 has increased significantly. For example, here is a list of yo-yos where the body is solid titanium (but other parts, such as the center, may be made of stainless steel or copper): Oxygene Oxy Ti (2009), Oxygene Oxy Ti 2011, NorthSpin Aurora, Vs. Newton Yo-Yo Concepts Ti Walker, YoYoJam Titan Gold, Kyo TiPhiter 1, Kyo TiPhiter 2, Kyo Tiraid, One Drop Sovereign, Anti-Yo BSP, Russell Andert Derti, YoYoRecreation Dazzler, etc.
Titanium produces a significantly different sound than aluminum when it resonates after being struck.
There is an unwritten rule in modern yo-yo naming that titanium yo-yos should have "Ti" or "ti" somewhere in the name, referencing the chemical symbol for Titanium, because yo-yo players are nerds that like the periodic table and puns.
- As strong as steel, but lighter, so it is possible to increase a yo-yo's rim weight beyond that of aluminum.
- Raw titanium finish does not oxidize to a dull color as fast as Aluminum
- Resistant to scratches
- Resistant to corrosion
- Sparks when "walked the dog" on concrete for a neat effect
- Significantly more expensive than aluminum ($100 vs $300-$600, Aluminum vs. Titanium)
- Anodize finishes are limited in comparison to aluminum, since color changes are accomplished by increasing the thickness of the native oxide layer.
- WARNING: Never use titanium axles with titanium yo-yos, the can fuse together
Types of Colorways Often Found on Titanium Yo-yos
- Anodized (more limited color pallet than Aluminium)
- Ultramatte (hardcoat?)
- AMS2488 (also hardcoat? would probably need to ask Luftverk)
- Torched (this can be factory done or it can be a DYI project, the temperature change can pull out a rainbow of colors, but the process is not totally predictable.)
Magnesium is another rare yo-yo material with properties similar to aluminum. It strong and light, and often used in race car wheels and disc brakes. The Duncan Freehand Mg was the first be made from a magnesium alloy and was followed by the General Yo Magnum. More recent Mg yo-yos include Turning Point Mgska and Turning Point Radix.
- Can be machined to very precise tolerances
- Can be anodized or powder coated
- Harder to work with than aluminum
- WARNING: Flammable in powder form!
Corian is the same material that countertops are made from.
There are currently no commercially produced yo-yos in this material, but a few prototypes and one-off yo-yos had been made of this material.
Steel is a relatively rare material in yo-yo production, and has been used to create the ILOVEYOYO St. Eel and the rims of the Northern Spin Helix. It most frequently makes an appearance in Bi-Material/Bi-Metal yo-yos because the increased density allows for more rim weight.
- Heavy enough to make an undersized yo-yo (such as the YoYoFactory Mighty Flea) feel like a larger yo-yo
- Can be anodized
- Dings and dents less easily than aluminum
- Too heavy for use in a full-sized yo-yo
- Susceptible to rusting
Types of Finishes
Another uncommon choice that, like steel, is frequently used for very undersized yo-yos, brass is usually left with a brushed finish that will acquire a patina when used. Examples include the Aoda Littles, Rain City Skills Loonie, and the Sturm Panzer SS-001 Mini Panzer. Sometimes also used for rim weight in Bi-Material/Bi-Metal yo-yos.
- Very dense compared to aluminium making it very good for mini yo-yos
- Acquires a patina over time (if you're into that)
- Way too heavy for full sized yo-yos
- Acquires a patina over time (if you're into that)
- Smells like brass (which isn't really the brass, it's you)
This type of yo-yo material selection allows the redistribution of weight by using materials with different densities for different parts of the yo-yo. This is most frequently used to provide more rim weight to improve "performance" and spin time.
- Aluminium with Stainless Steel Rims (most common, e.g. most of the YoYoFactory Edge series)
- Aluminium with Brass Rims (e.g. some G Squared designs)
- Titanium with Stainless Steel Rims (e.g. MagicYoYo REX)
- AL 7068 with Stainless Steel and Cobalt-Chrome rings (e.g. Sengoku Shogun)
- Aluminium with Stainless Steel and Polycarb rings (e.g. C3yoyodesign Trion Crash)
- Delrin/Pom with Titanium Rims (e.g. Toybania O-Ting and others in the Ting line)
- Aluminium with Plastic side caps (e.g. Duncan Freehand Al. Sometimes this is used to better enable fingerspins e.g. MagicYoYo Metal Skyva)
- Plastic with Stainless Steel rims
- Plastic with Aluminium rims
- Plastic with weight rings (various materials)
- Multiple types of plastic with different densities(???)