VEDALI HARDWARE CO., LTD
VEDALI HARDWARE CO., LTD Professional Hardware Supplier Perfect Engineering Solutions
Add to Cart
Durable High Precision Gears 13.5mm Derailleur Nylon Duplex Gear With 0.5m Modulus
Plastic duplex gears have a double gears design with different reference circles but same modulus , speed for big reference circle gear is slower than speed for small reference circle gear when they are driven under same power , this design is used to driven system with multiple purposes .
Material
Duplex gears are made from plastic nylon ( PA 66 )
Technical Data
| Modulus | m | 0.5 |
| Number of teeth | z | 24 |
| Outside diameter | da | 13.5 |
| Root diameter | df | 10.75 |
| Reference circle | d | 12 |
| 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 Big 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 Small gear in duplicate gears
Precision
Level 9 based on ISO standard .
Application
Plastic duplicate gears are mainly used to derailleur that for toy car , plane etc .
Performance
| Physical Performance | |
| Density ( g/cm3) | 1.14 |
| Water absorption % | 3 |
| Shrinkage % | 1～2 |
| Mechanical Property | |
| Tensile strength MPa | 60～80 |
| Elongation at break % | 2.2 |
| Bending strength MPa | 100～120 |
| Modulus of elasticity for bending MPa | 2000 ～3000 |
| Notched Impact Strength(J/m) | 60～100 |
| HR hardness | 118 |
| Electrical Performance | |
| Dielectric constant | 1.63 |
| Arc resistance sec | 130～140 |
| Specific volume resistance Ω·cm | 1.83×1015 |
| dissipation factor | 100～400 |
| Dielectric strength(kV/mm) | 20～30 |
| Thermal Performance | |
| Normal working temperature ℃ | 80～120 |
| Brittle temperature ℃ | -30 |
| Melting temperature ℃ | 252 |
| Pyrogenic decomposition temperature ℃ | 350 |
| Matin heatproof ℃ | 50～60 |
Features
Wear resistance
Good self-lubricant
High mechanical property
Resistant high temperature
Normally , plastic nylon duplex gears can be operated smoothly at temperature 150℃ and thermal deformed temperature is up to 250℃ when parts with glass fiber .
Perfect elongation
Elongation at break is 2.2% according to ISO 527 testing method .
Corrosion resistance
Good insulation
Specific volume resistance is 1.83×1015 and resistance to high breakdown voltage support part to be good insulated .
Resistant impact
60 – 80 KJ/M2 normally .
Resistant fire
Generally , the fire resistance is UL94V-2 and UL64V-0 for special parts .
Resistance to low temperature
Parts can be workable at -30℃
Environment friendly
Plastic nylon duplex gears meet RoHS or REACH environmental production standard .
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 .