Not only can CNC machining assist those looking to create a single prototype or large-scale productions, but it can also help to reduce manufacturing costs as well, which is usually the main priority.
The decisions you make while designing are what determines your final cost. Therefore, to lower your overall price, you can optimize the manufacture parts in compliance with your design requirements.
With CNC machining, the first thing we examine is what drives pricing. Then, we provide you with a comprehensive, actionable guidelines list proven to lower the cost of CNC machined parts.
What affects the Price of CNC parts?
The following are the factors that affect the cost of CNC machined parts:
Machining time is usually the main cost factor in CNC as the longer machining a part takes, the more it will cost.
The fixed cost of the unit price can be reduced by utilizing “economies of scale”. These are related to process planning and CAD file preparation, which are substantial for lesser volumes.
The overall cost can be reduced substantially by optimizing your design using certain materials that are easier to be machined in CNC.
Other Manufacturing costs
Designing parts with special conditions, such as thin walls or tight tolerances, may require closer quality control, special tooling, or other steps that use lower machining speeds which takes more manufacturing time, and impacts price.
Now that you know the key factors in determining the overall cost to get a free CNC machining quote.
Here are some tips to reduce your price:
Tip #1 – Add a Radius in Internal Vertical Edges
Tip #2 – Limit the Depth of Cavities
Tip #3 – Increase Thickness of Thin Walls
Tip #4 – Limit the Length of Threads
Tip #5 – Design Standard Sized Holes
Tip #6 – Only Specify Tolerances when Necessary
Tip #7 – Keep Machine Setups to a Minimum
Tip #8 – Avoid Small Features, that have High Aspect Ratio
Tip #9 – Remove all Lettering & Text
Tip #10 – Contemplate the Machinability of the Material
Tip #11 – Consider the Cost of Bulk Material
Tip #12 – Avoid Multiple Surface Finishes
Tip #13 – Think Blank Size
Extra Tip: Utilize Economies of Scale
The quantity affects the unit price substantially in CNC services as startup costs are moderately high and low quantities represent a high percentage of the price. However, large quantities are almost eliminated since the costs are spread out over many parts.
Try to keep things standard with CNC services, complexity costs more: geometries that require fixtures, special tooling, specialty materials, or multiple machine setups will be priced higher.
To keep the cost down to a minimum, answer the following questions before submitting an order for a quote:
- Did I use the Designing for Machinability guidelines to optimize my part?
- Can I split my design into multiple parts and then assemble it to make it easier on the CNC machine?
- Are all the features included in my model necessary? Can I simplify or remove any of them while still retaining the full functionality of my part?
- Is there a cheaper or easier machine, material that can meet my design requirements?
- Can my design be modified to eliminate special tooling or multiple machine setups?