Designing a single part and designing one that you will go on to make a hundred times over are genuinely different jobs. For a one off, you can tolerate fiddly assembly, a slow print and a fit that only works if you are careful. Across a whole batch, every awkward step and every wasted minute quietly multiplies into real cost and real frustration.
Our CAD team designs short run parts with the entire batch in mind from the outset, rather than perfecting a single unit and hoping the rest follow. The goal is that each part comes out consistent with the last, efficient to make on the chosen machine, and easy to put together without anyone needing special skill or patience on the bench.
Consistency across the batch
When you make many copies of something, they all genuinely have to come out the same to be useful. That means designing parts that are tolerant of the small variations any real process inevitably produces, so that a fit which works perfectly on the very first part still works just as well on the hundredth one off the machine.
Generous, well chosen clearances and robust, forgiving features matter far more here than chasing flawless perfection on a single unit ever would. A design that only assembles when every single part happens to be flawless will cause endless trouble across a batch, where natural variation guarantees that some parts sit at the edges of their tolerance.
Designing for efficient making
Small design choices compound dramatically across a production run. A part that prints without any support, packs efficiently onto a bed or build platform, and needs little or no finishing afterwards will be far cheaper per unit than one which quietly fights the process every single time it is made. Multiply that saving by the batch size and it becomes significant.
Choosing the right manufacturing route is a big part of this efficiency too. For larger batches of durable parts, MJF & SLS printing can pack many parts into a single build with no support to remove, while simpler or larger items may suit FDM printing better. The model should be designed to suit whichever process makes the most sense.
Choosing the right batch route
The break even point between processes shifts as the numbers grow, so the right answer for ten parts is often wrong for five hundred. A small handful are usually cheapest printed exactly as drawn, where the setup is trivial and you pay only for what you make. As quantities climb, the way a process packs parts and the labour it demands per unit start to dominate the per part price far more than the raw print time.
We weigh those trade offs honestly against your real quantity and timeline rather than defaulting to one method. Powder based MJF & SLS printing shines when you can nest many durable parts into a single build with no supports to clean, while FDM printing stays sensible for larger or simpler items in modest numbers. For very high volumes we will tell you plainly if printing has stopped making sense, so you spend on the route that actually suits the job rather than the one that is merely convenient.
Designing out the labour
The hidden and often underestimated cost in a short run is handwork, the quiet minutes of cleaning, fitting and assembling that vanish on a single part but dominate the bill across a batch. The smartest place to attack that cost is in the design itself, removing as much manual handling as the part will allow before a single unit is ever made.
- Minimise support so there is less to remove and clean up.
- Reduce part count to cut overall assembly time.
- Add self locating features so assembly needs no jigs.
- Design finishes that suit batch processing, not one offs.