A simple machined part made from stock bar can reach first samples in two to four weeks. A part that needs a casting pattern, a forging die or a special fixture usually takes six to twelve weeks before samples are ready. Approval and the first production batch add more time on top.
These are typical ranges, not promises. The real time depends on the part, the factory's workload and how quickly you answer its questions.
The stages of development
- The factory reviews the drawing and raises questions on tolerances, materials and finishes.
- Both sides agree the final drawing revision, the material grade and the inspection plan.
- Tooling is made, such as a pattern, die, fixture or special cutting tool.
- The factory buys raw material and any outside services such as heat treatment or plating.
- First samples are made and measured, and a sample inspection report is sent to you.
- You test the samples, approve them or ask for changes, and production starts.
What makes it slower
Tooling is the biggest variable. A sand casting pattern can be made fairly quickly, while a closed-die forging die or a pressure die casting tool takes much longer. If your part needs both a casting and machining fixtures, those steps add up.
Special materials are the next. A common steel or brass grade is available from stockists in Gujarat. A special alloy may need to be ordered from a mill, which can add weeks.
Unclear drawings cause the most avoidable delay. Missing tolerances, an unspecified surface finish or a material called by a trade name rather than a standard grade all lead to questions. Each round of questions costs days. See what to send for an engineering quote to get this right first time.
Your part of the timeline
Buyers often forget their own steps. Testing samples in your own plant, or with your customer, can take as long as making them. If samples fail and need a second round, the timeline grows again.
Plan for at least one revision. Many first samples are close but not perfect, and a small change to tooling is normal. A factory that ships perfect first samples every time is rare.
Ask for a first article inspection report with the samples. It gives you measured values for every dimension, so you can approve on facts rather than appearance.
How to speed things up
Send a complete drawing package and answer questions quickly. Approve the tooling design before it is cut. Agree in advance what tests the samples must pass and who will run them. Ask the factory for a dated schedule with each stage, and check progress weekly with photos.
If time matters more than tooling life, ask whether a soft tool or a machined-from-solid sample can be made first. This lets you test fit and function while production tooling is being made.
Next step
We review drawings with the factory, track development stages and check samples before they are sent to you. Book a free sourcing review to plan your new part.