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POM High Precision Gears , 25mm Duplicate Gears for Toy Car Derailleur Straight Teeth

Categories High Precision Gears
Brand Name: VDL
Model Number: PG2505
Certification: ISO
Place of Origin: China
MOQ: Negotiation
Price: Negotiation
Payment Terms: L/C, T/T, Western Union , Paypal
Supply Ability: 500 , 000 pcs per month
Delivery Time: 30 days
Packaging Details: 10000 pcs each carton in bulk with dimension 20 X 22 X 25 cm , 500 cartons to a 20 ft container
Material: POM
Fire Resistance: UL 94V-2
Modulus: 0.5
Teeth Number: 48
Pressure Angle: 20°
Reference Circle: 24
OD: 25
ID: 22.75
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    POM High Precision Gears , 25mm Duplicate Gears for Toy Car Derailleur Straight Teeth


    POM High Precision Gears , 25mm Duplicate Gears for Toy Car Derailleur Straight Teeth


    Duplicate gears are made up of a smaller gear and a bigger gear , both gears are same on modulus but different on number of teeth . speed can be adjusted as different reference circle diameters of both gears .


    Technical Data


    Modulus

    m

     0.5

    Number of teeth

    z

     48

    Outside diameter

    da

     25

    Root diameter

    df

     22.75

    Reference circle

    d

     24

    Depth of tooth

    h

     1.12

    Tooth addendum

    ha

     0.5

    Tooth Dedendum

    hf

     0.625

    Pitch

    p

     1.57

    Teeth thickness

    s

     0.8

    Pressure angle

    ɑ

     20°

    Unit : mm Bigger gear in duplicate gears


    Modulus

    m

     0.5

    Number of teeth

    z

     10

    Outside diameter

    da

     6

    Root diameter

    df

     3.75

    Reference circle

    d

    5

    Depth of tooth

    h

     1.12

    Tooth addendum

    ha

     0.5

    Tooth Dedendum

    hf

     0.625

    Pitch

    p

     1.57

    Teeth thickness

    s

     0.8

    Pressure angle

    ɑ

     20°

    Unit : mm Smaller gear in duplicate gears


    Precsion


    Level 9 based on ISO standard .


    Material


    Plastic duplicate gears are made from plastic POM with white color .


    Application


    Plastic duplicate gears are mainly used to derailleur that for toy car , plane etc .


    Mechanical Property


    Tensile strength MPa

    62

    Elongation at break %

    60

    Bending strength MPa

    98

    Modulus of elasticity for tension MPa

    2830

    modulus of elasticity for bending MPa

    2600

    Compressive strength MPa

    110

    Shearing strength MPa

    54

    Notched Impact Strength(J/m)

    65

    HR hardness

    80

    Friction

    0.15

    Fatigue MPa

    31


    Electric Performance


    Heat distortion Temperature(1.82MPa)℃

    124

    Normal working temperature ℃

    100

    Working temperature arrange ℃

    -40℃~100℃

    Coefficient of linear expansion (×10K)

    8.5

    Heat conduction W/(m·K)

    0.23


    Features


    Good wear resistant

    Wear resistant strength still keeps 35MPa or so even item is put 10 J variable load . it is best compared to items that with PA,ABS,HPVC,PS,PC


    Resistant impact

    POM has good impact resistance but inferior to ABS and PC , Impact performance will be down 90% or so if there is breaking on or in product .


    Self-lubricant

    POM parts with F4 , C ,MoS2 ,PE and lubricant elements that improve self-lubricant performance .


    Stability in dimensions

    POM part with good tensile strength and hardness that not easy to be deformed and broken .


    Resistant Organic solvent

    POM parts are resistant for hydrocarbon ,alcohol ,ether ,aldehyde , gasoline ,lubricant and Weak Alkalis .


    Small creep properties

    Creep property rate is 2.3% or so in 20℃,21MPa,3000h . and nearly not be effected by temperature


    Good insulation

    POM items nearly not be effected by temperature and humidity on insulation . insulation is related with the thickness of items , eg when thickness is 0.127mm insulation is 82.7kV/mm,thickness is 1.88mmi insulation is 23.6kV/mm


    Tips for use


    POM duplicate gears are easy to be cracked and pulverized outside long-term .


    Don’t put POM duplicate gears under temperature over 100℃


    Don’t put POM duplicate gears under circumstance with alkali and oxidant .


    More plastic gears we manufactured


    We provide more plastic gears except duplicate gears , eg , spur gears ,bevel gears ,plastic gears for reducer ,worm gears and involute gear .


    Quality POM High Precision Gears , 25mm Duplicate Gears for Toy Car Derailleur Straight Teeth for sale
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