What are the disadvantages of plastic gears?
On the other hand, low strength, tendency to hold heat, large dimensional change including backlash compared to metal, etc. are some of the points requiring caution. The degree of dimensional changes that occur with plastic gears depend on the ability to resist temperature change, moisture absorption rate and resistance to chemicals.
What are the advantages of KHK plastic gears?
KHK’s fused gears are designed in such a way that the holding strength of the fused surface is stronger than the tooth strength. The positive characteristics of plastic gears include being lightweight, non-rusting, quiet, injection molding enabling low cost and large production, and able to operate without lubrication by mating with metal gears.
How to calculate bending strength of plastic gears?
At KHK, the bending strength of plastic gears are computed with the Lewis formula. On the other hand, the tooth surface strength calculation is based on the manufacturer of MC Nylon and needs no consideration. Please enter part number here for a price and a drawing of the gear
What kind of resin is used in plastic gears?
The most plastic gears that are in use nowadays are made from either Duracon with milky white color (polyacetal resin) or MC nylon with blue color (polyamide resin).
How to repair and refinish your ATV and dirt bike plastics?
1. Pre-mix in a container or spray bottle 3 parts boiled linseed oil to 2 parts paint thinner. 2. Pour some of the mixture onto your plastics or on a rag, and wipe along the surface. It will be a bit runny so make sure you keep the rag moving. The secret here is to apply a thin layer to the entire surface area. 3.
What causes plastic to fade on a dirt bike?
It’s pretty obvious what causes a crack, but what causes your ATV and Dirt Bike plastic to fade is a bit more difficult to explain. Plastic is made primarily from refined crude oil. When it sits in the sun for extended periods, the surface level oils can evaporate and cause the plastic to dry out. Dried plastic loses its sheen and fades.
What’s the best way to fix faded plastic?
Take your plastic outside and hold the spray bottle 1–2 feet (0.30–0.61 m) away from the vinyl. Spray it liberally with your vinegar and water and let it sit for 2-3 minutes. Then, rinse the plastic off with cold water and dry it with a cloth or paper towel. If the plastic is still faded, repeat this process.