Product Overview
A spur gear plate is a disk-shaped gear component with teeth running parallel to the axis, featuring simple structure, easy manufacturing, high transmission efficiency, and no axial force. As the most classic and widely used gear form, spur gear plates are suitable for medium-low speed power transmission between parallel shafts, extensively used in reducers, transmissions, machine tools, and automation equipment.
Yubao Transmission Technology produces spur gear plates with outer diameters from φ50–500mm, module range 0.5–5.0mm, and gear accuracy up to DIN Grade 5 (ISO 1328). Using CNC gear hobbing + grinding processes, teeth are carburized and hardened to surface hardness HRC 58–62 with core hardness HRC 30–45, combining excellent wear resistance with impact toughness. Face runout ≤0.02mm (relative to bore) and radial runout ≤0.02mm (tip relative to bore) meet the stringent requirements of precision reducers and high-end automation equipment.
Technical Parameters
Gear Parameters
| Parameter |
Symbol |
Unit |
Value/Range |
Tolerance |
Notes |
| Outer Diameter (Tip) |
da |
mm |
50–500 |
h11 |
Tip circle diameter |
| Module |
m |
mm |
0.5–5.0 |
— |
Standard module series |
| Number of Teeth |
z |
— |
Customized |
— |
Determined by transmission ratio |
| Pressure Angle |
α |
° |
15°–30° |
— |
Typically 20° |
| Pitch Diameter |
d |
mm |
Customized |
— |
d = m×z |
| Face Width |
b |
mm |
5–200 |
±0.05 |
Typically equals plate thickness H |
| Profile Shift Coefficient |
x |
— |
Customized |
— |
If profile shifting required |
| Accuracy Grade |
— |
DIN/ISO |
Grade 5 |
— |
Achievable: DIN Grade 5 |
| Face Runout |
— |
mm |
0.02 |
≤ |
Relative to bore datum |
| Radial Runout |
— |
mm |
0.02 |
≤ |
Tip relative to bore |
Materials & Heat Treatment
| Parameter |
Symbol |
Unit |
Value/Range |
Tolerance |
Notes |
| Tooth Hardness |
HRC |
— |
58–62 |
— |
After carburizing |
| Core Hardness |
HRC |
— |
30–45 |
— |
Toughness assurance |
| Material Grade |
— |
— |
Customized |
— |
Common: 42CrMo, 20CrMnTi, 16MnCr5 |
| Heat Treatment |
— |
— |
Tempering/Carburizing/Nitriding |
— |
Determined by application |
| Static Balance Grade |
— |
— |
Customized |
— |
Critical parameter for disk gears at high speed |
Machining Capabilities
| Process |
Equipment |
Range |
Accuracy Achieved |
| Gear Hobbing |
Ningjiang YK3610V/Chongqing SKS3112 |
Module 0.5–8mm, OD ≤320mm |
DIN Grades 6–7 |
| Gear Grinding |
Qinchuan YKZ7230/Xinghe PG2840 |
Module 0.5–3mm |
DIN Grades 4–6 |
| Gear Shaping |
Changji YKS5132 |
Internal gears/multi-stage gears |
Module 0.5–8mm |
| Heat Treatment |
Carburizing/Nitriding/Induction Hardening |
Case depth 0.3–1.5mm |
Surface HRC 58–62 |
| Gear Inspection |
Gleason 300GMS Gear Tester |
Profile/Alignment/Pitch |
100% inspection |
| Geometric Inspection |
HEXAGON CMM/Mahr Roundness Tester |
Runout/Coaxiality/Face |
0.1μm level |
Accuracy Grade Reference
| Accuracy Grade |
Module Range (mm) |
Profile Error (μm) |
Cumulative Pitch (μm) |
Application |
| DIN 4 |
0.5–2.0 |
≤3 |
≤8 |
Precision instruments, high-end reducers |
| DIN 5 |
0.5–3.0 |
≤5 |
≤12 |
Precision reducers, servo transmission |
| DIN 6 |
1.0–5.0 |
≤7 |
≤18 |
General reducers, industrial transmission |
| DIN 7 |
1.5–5.0 |
≤10 |
≤25 |
General mechanical transmission, low-speed heavy-duty |
Plate Structure Types
| Structure Type |
Characteristics |
Application |
| Solid Plate |
Simple structure, maximum rigidity |
Small diameter, high rigidity requirements |
| Webbed Plate |
Reduced center section for weight reduction |
Medium-large diameter, weight control needed |
| Spoke Plate |
Large diameter lightweight design |
Large diameter gears (da>300mm) |
| Hubbed Plate |
Extended hub for axial positioning or bearing fit |
Requires axial positioning or bearing mounting |
Product Features
- High Accuracy: Grinding accuracy up to DIN Grade 4, face/radial runout ≤0.02mm
- High Transmission Efficiency: Spur gear meshing with no sliding loss, single-stage efficiency >98%
- No Axial Force: Teeth parallel to axis, bearings free from axial loads
- High Load Capacity: Tooth hardness HRC 58–62 with effective case depth, long wear life
- Versatile Structures: Solid, webbed, and hubbed configurations available
- Comprehensive Inspection: 100% gear inspection + geometric measurement, traceable quality data
Typical Applications
| Application Sector |
Specific Use |
Typical Parameters |
| Precision Reducers |
Final stage large gear |
Module 1.5–3mm, DIN Grades 5–6 |
| Industrial Automation |
Servo transmission gear plate |
Module 0.5–2mm, DIN Grades 4–5 |
| Machine Tools |
Headstock speed change gears |
Module 2–4mm, low noise |
| Construction Machinery |
Transmission drive gears |
Module 3–5mm, heavy-duty |
| Automotive |
Transfer case/differential gears |
Module 1.5–3mm, batch consistency |
