How 2D Drawings Help Manufacture Better Parts

Fact: 3D CAD technology makes the product design process up to 50% faster than using 2D drawings alone. But does that mean 2D CAD drawings are obsolete?

It may surprise you to learn that while 3D CAD models have revolutionized product design, 2D designs still play a very important role in the manufacturing process. Engineers who solely depend on 3D models may be overlooking critical information that can affect the manufacturing process. In some cases, not having 2D drawings can cause significant production delays. 

Here’s why 2D drawings are still valuable in the manufacturing process.

  • Manufacturers appreciate clear design instructions from a manufacturing perspective. We’ve worked with many engineering companies in Florida and across the country, and there can be a disconnect between the nominal dimensions provided in 3D models and the way that parts fit together once they’ve been produced. 2D drawings which supply specific information on part design for machining intent are incredibly helpful to manufacturers. 
  • Fit and functionality. Dimensional specs ensure that your parts fit and function well. If we have to generate our own set of measurements from a 3D model, it takes up valuable time and can increase turnaround. On the other hand, a good 2D drawing with accurate and complete dimensional specs allows our team to quickly bring your project to completion.
  • Tolerances. We also recommend 2D drawings to to help us understand critical part characteristics like tolerances, which 3D CAD models don’t provide. Keep in mind, however, that very tight tolerances may be more difficult to produce and can increase the price of your part. So make sure you assess whether or not the part can be made successfully with the tolerances opened up. If you have a little wiggle room, use it!
  • Pricing. 3D files (Solidworks, STEP, IGES) are incredibly useful in generating quotes quickly, but there are other factors that may affect the final price of your part. 2D drawings help identify critical dimensions or potential issues that might affect cost.

Having well-rendered, complete, and accurate 2D drawings will ultimately help us create better parts that are produced faster, with fewer mistakes, less back and forth, and minimal hassle. 

Of course, if you want to take advantage of our product development services, the Polyhistor team is able to create both 3D models and 2D drawings for you. But if you’re starting with your own designs, including 2D drawings will help you have a more seamless manufacturing process from beginning to end.

On the lookout for a manufacturing partner? You’re in the right place. Whether you need CNC machining, injection molding, sheet metal fabrication, or a 3D print house in Jacksonville, FL, we’re here to help.

Submit your request for quote from Polyhistor today (2D drawings are always a plus!)

P.S. If there are specific manufacturing  topics you’d like us to cover, please let us know!

What is needed to build prototypes, and problems we have encountered.

question-mark-funny-faceDuring the course of a year, there are always many inventors and companies that contact us for prototype creation.

Some have paper napkin sketches and want a new product engineered and prototyped, or a 3D version printed. Others may have products that are already engineered and they want us to build a prototype. Let’s go over the latest scenario, since many have questions about what is needed to build a prototype. Also, we will cover some of the difficulties that a prototype builder can be faced with.

The major things we encounter are the following:

  1. No 3D CAD files available. Today, most manufacturing methods need 3D CAD files. These are 3 dimensional representations of the product design, and are used for 3D printing. 3D CAD files are also used for machining and mold making. Remember that before you engage a consultant for your product design, make sure you own all the designs generated including 3D CAD files. We have, on occasion, come across inventors that do not have the 3D files, and come to find out that they didn’t pay the designer. That is also a sure way to not get the files you need.
  2. The parts cannot be manufactured as designed. Yes, when you design products, you need to know what manufacturing method to use for mass production, and that is long before you even start designing. For example, a machined parts in aluminum would have a completely different design than if it would have been injection molded in plastic. Also, some parts might be too thin and flimsy, whereas other may be too thick for a particular manufacturing method.
  3. The product looks beautiful… on the outside… even in product development, beauty is only skin deep. We have encountered some really beautiful designs that cannot be assembled since they did not have screw holes and no mounting features on the inside for internal components. Therefore, essentially, only half of the product was designed, the outside. In this case, we asked the engineer, who actually had many years of experience, how he intended to assemble the product for production. The response was that it was up to a prototyping company to figure out… Although we have no problems fixing designs, we felt bad for the inventor who believed that his product was finished and ready for production. Make sure that you hire an engineer that designs products that can be made.
  4. Parts do not fit together. Every time you make a product, the dimensions will not be exact due to manufacturing tolerances, so the design needs to account for those variations. Sometimes, we see simple mistakes like trying to put a 0.5″ pin into a 0.5″ hole, which will not work even it if was made exactly to specifications. In this case, the pin needs to be pressed in to the hole with force, or you change the tolerance so that the hole is larger and the pin is smaller and it will slip in just fine.
  5. The use of non-standard parts. We have recently seen frames that are supposed to be telescopic with very tight bend radius (read impossible) in non-standard sizes. To be able to prototype to specifications, extrusion tools have to be purchased (expensive if you just want to make one), or the parts have to be redesigned for manufacturing. It is also common to use non-standard screws and uncommon thread. When you design products, make sure you can find a company that sell the parts and check if they have the particular part in stock. If you can’t find the parts during the design process, you will probably not find them when you go into production either.
  6. Almost anything can be 3D printed, even though it cannot be made with any other process. Again, it common for us to have a client that says that the prototype works fine, but they cannot get any quotes from a manufacturer because the design is not manufacturable. We can typically change those parts using the principles of design for manufacturability.

If you have any questions, please contact at us and we would be happy to assist you.

Contact us to learn more: or +1.904.646.5666



Photo renderings of your ideas

You know what your thing should look like, and what it should do.  It is probably something you have come to know like a good friend.  You have probably spent hours of creative time working on it, thinking about it, and revising it over and over again.  “Obsession” is a word that usually describes it.  That is okay.  We understand. 🙂

Most folks need to sell their thing or idea someday.  The people who need to visualize that thing are usually investors or users who would very much like to see and understand your thing before investing their resources in it.  Sometimes it is not financially practical to have a complete prototype ready to show to investors, especially when those investors are not located where you are.  Consider too that to see a photo and to have an actual prototype in hand present different risks for having your idea copied by others.

Concept drawings of the Adrenaline Mount

One of the strengths of designing parts or complete assemblies in 3D CAD software is that we can generate photo-realistic images of what the part will look like when it is made.  We can place logos, add photo-realistic lighting, backgrounds, or whatever is needed to depict the device.  Sometimes those images lead to aesthetic changes that can mean all the difference in the final product.  Sometimes those images get used for promotional materials that would be difficult to generate by using a physical model.  Sometimes those images go no further than a portfolio.

Sometimes a photo is indeed worth a thousand words.

New device saves money for truckers and fleets

Rapid prototyping helped us develop a better tool for Slack Dog Tools.  Sometimes we find ourselves developing products to solve problems that we did not know existed.

Trailers have electrical connectors that connect the lights on the trailer to the truck hauling it. Commercial trucks use a universal 7-pin socket connector for this purpose.  The spring-loaded door that covers this connector on the truck also has a retaining tab built into it that holds the electrical plug in place.  It is a simple design, and it works well most of the time.

The rhythmic movements, excess dirt, and vibrations of normal use eventually cause the electrical plug to become loose. Eventually it becomes difficult to reconnect the electrical plug for the trailer.  Truck drivers usually resort to sticking a screw driver into the socket to straighten the pins, and the rest is a nightmare for fleet managers.  Broken pins, severely bent pins, and blown fuses are the results of this traditional method of on-the-spot repair.  What is a common and inexpensive repair at a maintenance shop now can lead to an expensive ticket, late delivery, or worse, a serious safety issue that leads to an accident.  None of these scenarios is good for a trucking company.

In comes Slack Dog Tools and their new tool, the Pin Separator Tool.  Using this newly developed tool, the truck driver can press the tool into the connector and straighten all of the pins at once without any damage to the pins or connector.  The process is easy and fast- which also means it is also more likely to get done.

Pin Separator Tool

Image of the pin separator tool website.

Early prototypes were printed on our Objet printer in VeroGray and readied for testing.  When the client had sufficiently tested the tool, we set up the manufacturing for full production.  The finished tool is made from high-impact ABS plastic.   For more information about the tool, please visit our client’s website.

Contact us to learn more: or +1.904.646.5666

Rapid tooling, rubber grommet

“Yes, but I need parts NOW!!!”

A last-minute cable design change required a different grommet to protect a cable as it passed out of an enclosure.  Nothing was available off-the-shelf that had the shape characteristics we needed.  In this case, we needed the durability, heat resistance, and strength and there were no rapid prototyped material available on the market with matching characteristics. We had to come up with a different solution, and we only had a few days to figure it out.

Traditionally, it was necessary to cut expensive injection molding tooling which  takes a few weeks. With small production runs, this approach does not make economic sense for a few parts only worth a couple of dollars. Traditional solutions were not good options.

We solved the problem using rapid prototyping but not in the way most folks would expect.

With a few hours to design and print, we made several sets of tools in the Objet 3D printer.  We then molded the parts we needed using a polyurethane resin.  Polyurethane resins come in different hardness values, physical properties,  and can be color pigmented to match almost any color.

Our mold design uses four interlocking parts.  The unique design allowed the grommet to be molded without any visible mold flash lines on the cosmetic surfaces.  One feature of the Objet 3D printer is that it has the ability to print parts with glossy surfaces, so our molded part would also have glossy surfaces.  The rapid prototyped mold we created required no post-processing as it was ready for use as soon as it came out of the printer.  We put it to use that day.

This same technique can be used to generate other molds for other applications.  Let us put this technology to work for you.

Contact us to learn more: or +1.904.646.5666

Keep your new products simple

We like developing simple products, not just because it is simple.  Simple products are easier for our clients to quickly get out on the market. (Don’t get me wrong, we really love challenging projects too…) Since speed to market is important, not only to be first one out there, but also get your invested money back as sales are starting to trickle in. If you had chance to meet the owner of Polyhistor International, Inc., Peter Schönning, you have most likely heard him say, “sales is when the rubber meets the road.”  One great example is Shaving Slip, a product we assisted our client with from concept to finished product.


The Shaving Slip prevents those pesky rust stains from shaving cream cans. I am personally really glad that I do not have to deal with rust stains anymore (the wife is even happier and we all like a happy wife).  To learn more, go on to Facebook and like them and if you want one, you can get it here

See.. it doesn’t have to be that complicated to make a new product.

Contact us to learn more: or +1.904.646.5666

Rapid Prototyped tools for Contract Manufacuting

Our rapid prototyping capability helps us make tools quickly for our contract manufacturing needs.

Have you ever been tinkering around and wondered to yourself, “If only I had a tool that could do…”   All of the mechanical engineers I know have extensive tool boxes. While it is great to have every driver, wrench and helpful thingy known to man at the tip of your fingers, it is not always a tool that is off-the-shelf that will do the job.

One of the services we provide is the manufacturing of wire harnesses.  In one case it was necessary to twist wires together and the client needed parts fast.  Sounds easy, right?  Try buying a reasonably priced tool that can do that, especially when you have crimped ends that most folks don’t use. The lead time to actually get the twister delivered would directly have put us out of the picture.

Since our strength is custom work in relatively small runs of maybe a few thousand pieces, we make our own tools using rapid prototyping.  One of our favorite tools is a handy little device that we use for wire twisting.  Using a small motor, a foot switch, and our special rig, it works consistently and efficiently.  When you need to twist wires for 500 harnesses, the little rig can save hours of work.  With our rapid prototype capabilities, we can easily make new fixtures to accommodate different crimped ends.  Within 24 hours we had conceptualized, designed, and 3D printed the wire twister which is seen in action in the video we made.


Contact us to learn more: or +1.904.646.5666

So what do I need to do to have it made?

Key chain example

This part is a sample piece that can only be produced using rapid prototyping techniques.

Rapid prototypes require a 3D CAD file in STL format.  If you have one, you can upload the file here.  We will send you a quote by e-mail shortly.  The rapid prototype can be produced and delivered to you within a few days.

But what if my design is not completed?  That is where our engineers come in.  We are experienced product development engineers that can complete the design for you.  We can work from as little as paper napkin sketches.  Sometimes our clients bring us mock-up models taped together using foam core, off-the-shelf parts, and cardboard.     As long as what you have conveys the concept, we can make it happen.

Some people have experience with design, and prefer to do it themselves, but do not have the software resources that design engineers use.  If you want to design the product yourself there are some free or low-cost alternatives available.    Our favorite review site Top Ten Reviews has reviewed low-cost CAD software.  There are also open source CAD programs that are free.  If your intention is rapid prototyping, you need to make sure that the software can export STL files.  If you plan to send your design out for production at a later stage, many mold makers prefer to work with STEP or IGES formats.

Caution:  We have not tried these low-cost or free programs so we cannot say anything about how they perform.  Another caution is that a design is typically not better than the designer.  I am in the possession of a word processor but it does not make my writing skills better 🙂  Remember that almost any part can be rapid prototyped.  When the part goes into production there are limitations to consider that are not readily apparent if you do not have experience with the production equipment.

Contact us to learn more: or +1.904.646.5666