A good drawing shortens the path from request to quote. For CNC machining, gear production, and gearbox-component repair, the useful input is not only the part shape, but also material, tolerances, quantity, and target delivery date.
For a gear wheel, pinion, or shaft, include module, tooth count, diameter, width, fits, and functional surfaces where available. For repair parts and replacements, a photo or sample of the existing component is often useful too.
Before sending a request, check that the expected delivered output is clear. The more precise the input, the faster a supplier can identify risks, price the work, and confirm a realistic timeline.
What should a part-production request include?
| Input | What it clarifies |
|---|---|
| Drawing | Dimensions, tolerances, critical holes, fits, and functional faces. |
| 3D model | Part shape and possible clashes that are easy to miss in a drawing. |
| Material | Machinability, strength, availability, cost, and possible surface finishing. |
| Quantity | Difference between one-off production, small-batch production, and repeat work. |
| Gear parameters | Module, tooth count, diameter, width, and gear type. |
| Lead time | Requested lead time, reviewed according to difficulty and material availability. |
Drawing checklist before sending a request
- Are functional dimensions, fits, and mating faces marked?
- Is it clear which dimensions are critical and which are supporting?
- Is material named, or is the operating environment described?
- Are basic gear parameters included where relevant?
- Is it clear whether the job is new part production, replacement, or repair?
Frequently Asked Questions
Is a photo of the existing part enough?
A photo helps with repair and replacement parts, but it does not replace dimensions, material, and tolerances. It works best with a drawing, sample, or description of the part function.
When should 3D data be included?
3D data helps with complex shapes, milled parts, gearbox components, and areas where installation or assembly clashes may occur.