1) Description of Spur Gear
From the perspective of general-purpose basic transmission, spur
gears are cylindrical gears with teeth parallel to the gear shaft
axis. They represent the simplest and most widely applied
fundamental type in gear transmission, primarily serving to
transmit power and convert rotational speeds between parallel
shafts.
2) Characteristics of Spur Gear
Characterised by a simple structure (featuring a zero helix angle
design), mature manufacturing processes (capable of being produced
via conventional methods such as gear hobbing and gear shaping),
and low cost; its advantages include stable transmission ratios
(where the contact line of the tooth surfaces remains parallel to
the axis during meshing, facilitating consistent transmission
accuracy), straightforward installation (eliminating the need to
consider helical direction compatibility), strong adaptability
(compatible with diverse power sources and actuators), and low
maintenance and replacement costs.
5) Application
Suitable for general applications where transmission complexity and
space requirements are not stringent, such as: - Connecting small
motors to fans - Gear mechanisms in hand tools (e.g., spanners,
winches) - Drive systems in household appliances (e.g., washing
machines, juicers) - Auxiliary transmission components in
agricultural machinery (e.g., seed drills, small harvesters) - Gear
demonstration models in educational experimental apparatus.
Technical Specifications
| Parameter | Specification |
|---|
| Custom Made | Available |
| Gear Profile Type | Cylindrical Gear |
| Manufacturing Process | Gear Grinding |
| Teeth Grinding | Included |
| Module (M) | Custom |
| Number of Teeth (Z) | Custom |
| Pressure Angle (α) | Custom |
| Lead Angle | 0° |
| Accuracy Grade | ISO 6-7 Grade |
| Heat Treatment | Carburizing |
| Surface Hardness | 58-62HRC |
Steel Code Grades Comparison
| CHINA/GB | ISO | ГΟСТ | ASTM | JIS | DIN |
|---|
| 45 | C45E4 | 45 | 1045 | S45C | CK45 |
| 40Cr | 41Cr4 | 40X | 5140 | SCr440 | 41Cr4 |
| 20CrMo | 18CrMo4 | 20ХМ | 4118 | SCM22 | 25CrMo4 |
| 42CrMo | 42CrMo4 | 38XM | 4140 | SCM440 | 42CrMo4 |
| 20CrMnTi | | 18XГT | | SMK22 | |
| 20Cr2Ni4 | | 20X2H4A | | | |
| 20CrNiMo | 20CrNiMo2 | 20XHM | 8720 | SNCM220 | 21NiCrMo2 |
| 40CrNiMoA | | 40XH2MA/40XHMA | 4340 | SNCM439 | 40NiCrMo6/36NiCrMo4 |
| 20CrNi2Mo | 20NiCrMo7 | 20XH2MA | 4320 | SNCM420 | |
Manufacturing Process
