Sun Gear Materials and Heat Treatment: RFQ Checklist
Material and heat treatment should be selected from load, life and drawing requirements rather than copied from an unrelated gear.
Material definition
Use the controlled grade and condition stated by the design, including any substitution approval process.
Hardness and case
If case hardening is required, specify surface hardness, effective case depth and core requirement where controlled.
Verification
Ask for the material/heat-treatment records that are actually required by your quality plan.
Use the drawing as the controlled record
A technical guide can explain which variables matter, but the final sun gear must be approved from the actual drawing and operating requirement.
If a value is missing, identify it for confirmation instead of copying a dimension or material from a different supplier or gear family.
RFQ checklist
Send the sun gear drawing or measured tooth data, mating planet/ring information, interface dimensions, material/process requirements, duty, quantity and destination.
Deeper buyer guidance
Material and heat treatment should be tied to duty and the approved design. Hardness alone is not a complete specification.
For new designs, use the complete planetary geometry and functional datums before deciding the process route. For replacement work, use photos and equipment references for context but let measured tooth and interface data control the new part.
What to control on the RFQ or drawing
| Item | What to define |
|---|---|
| Planetary mesh | Sun, planet and ring tooth data plus planet count when known. |
| Center interface | Bore, key, spline or shaft features with functional datums. |
| Operating duty | Rated/peak torque, speed, reversals/shock, life and environment. |
| Material/process | Controlled material, heat treatment, finish and coating requirements. |
| Acceptance | Gear/runout/dimensional checks and required documentation. |
Frequently asked questions
Can a visual match confirm interchangeability?
No. Similar outside dimensions can hide different pitch systems, pressure angles, profile shift or interface fits.
Should mating gear data be included?
Yes whenever available, because planetary geometry is easier to verify as a system.
What if a value is unknown?
Mark it as open and provide the available sample, mating component or application data rather than guessing.
Solicitar um orçamento / Enviar solicitação de cotação
Send the drawing, tooth data, mating-component information, duty and quantity. We will review the interface before quotation.
