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Medical Device High Precision Gears , 78 Teeth 40mm White Plastic Spur Gears

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Medical Device High Precision Gears , 78 Teeth 40mm White Plastic Spur Gears

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Large Image :  Medical Device High Precision Gears , 78 Teeth 40mm White Plastic Spur Gears

Product Details:
Place of Origin: China
Brand Name: VDL
Certification: ISO
Model Number: PG4005
Payment & Shipping Terms:
Minimum Order Quantity: Negotiation
Price: Negotiation
Packaging Details: 10000 pcs each carton in bulk with dimension 20 X 22 X 25 cm , 500 cartons to a 20 ft container
Delivery Time: 30 days
Payment Terms: L/C, T/T, Western Union ,Paypal
Supply Ability: 500 , 000 pcs per month
Detailed Product Description
Material: POM Fire Resitance: UL 94V-2
Modulus: 0.5 Teeth Number: 78
Reference Circle: 39 Pressure Angle: 20 °
Teeth Style: Straight Pitch: 1.57
High Light:

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Medical Device High Precision Gears , 78 Teeth 40mm White Plastic Spur Gears



0.5 modulus drive spur gear with 78 straight teeth , six strengthen ribs placed on both surface sides and 6 mm pin with hole in centre .



Key Features




Low noise


Small inertia


Efficient transmission


Light weight



Technical Data


Modulus m  0.5
Number of teeth z  78
Outside diameter da  40
Root diameter df  37.75
Reference circle d  39
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





Level 10 based on ISO standard .





Drive spur gears are made from plastic POM fire resistance grade UL94V-2





Drive spur gears with common design for industrial parts except medical device , eg. Duplicating machine ,printer ,timing device , wall clock ,vacuum cleaner ,car light 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





High mechanical strength

Tensile strength can be up 50.5MPa . close to metal properties . and only a tiny change on mechanical strength even working temperature has a large change .


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 .



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



In addition to plastic spur gear , we make more plastic gears as well like bevel gear ,duplicate gear ,herringbone gear etc which are used to various fields . customized designs are also available for us . welcome you to contact us for more information about plastic gears .


Contact Details

Contact Person: MR.LIN

Tel: +8613556778272

Send your inquiry directly to us (0 / 3000)