3D Printer

Showing all 7 results

Used 3D Printers

Industrial Used 3D Printers

faster, a machine shop that wants to explore 3D printing, a product designer striving for greater innovation or an educator who wants to boost engagement with exciting classroom projects, you’ve come to the right place!  CNCMachines.Net carries a range of used 3D printers. 3D printing has become mainstream now than ever before. In some cases, it has the potential to disrupt the manufacturing of products that are currently machined. We specialize in providing an easy way for manufacturers to enter the marketplace of 3D printing and stay competitive with quality used 3D printers for sale on our site.

3D printers come in a wide range of types, sizes, and capabilities. Many different kinds of materials can be 3D printed, each with different results. On this page, we’ll provide some guidelines to help you select the best technology by helping you strategize and providing an overview of common 3D printing technologies. Whether you are buying or selling 3D printers, we can help. Contact us at 844-262-6789, and we’ll get started to find the best solutions for your shop!

Guidelines for Researching 3D Printers

What is your primary goal for 3D printing? Since professional 3D printing encompasses such a wide range of materials, capabilities, and technologies, you’ll need to clarify your intent so that you can stay focused on the most relevant issues and avoid information overload. Examples of common goals include:

  • We want to test more design ideas in less time.
  • We want to explain our ideas to colleagues more clearly.
  • We want to promote student engagement and interest in STEM.
  • We want to improve customization for products in production now.
  • We want to produce something that has been impossible with other manufacturing methods.
  • We want to create custom objects for use, such as tools or jigs.
  • We want to build functional prototypes to correct errors and make improvements.

Once you have decided what you want to 3D print and why, ask yourself what your used 3D printer needs to do, where it needs to be installed and how long it should last. Keep this in mind before you search for a specific used 3D printer for sale.

What does the 3D printed part need to look like? What does the 3D printed part need to do and for how long? Where will the 3D printed part function?
Consider the aesthetics of the 3D printed part that you want to make and the steps you’ll need to take to get your desired result. What your 3D printed part or product does can determine the need for tolerances and material types. Where the final product will be used (its environment) is important for determining material properties needed – like UV resistance, biocompatibility or high heat-deflection temperatures.
Does it need to be realistic looking? What does that mean to you? Is the part designed to demonstrate a concept, function like the finished product or is it the actual finished product? Will it need to withstand heat or pressure?
Do you need a glossy surface finish? Will it need to bear a load such as a hinge, snap or match with other interlocking parts? Will be used outdoors where it could be exposed to sunlight?
Do you need to print in multiple colors and materials? How long does the part need to last? Will it make contact with a human body?

3D Printers: Common Types of Technologies

When you are searching for a used 3D printer for sale, you’ll notice a number of types of technologies with different names. To help you compare similar types of printers, below are five common technologies with their synonyms and similar technologies as you may find advertised on a used 3D printer for sale.

Fused Deposition Modeling

Similar Technologies/Names: (Fused deposition modeling (FDM)), fused filament fabrication, plastic jet printing, filament extrusion, fused filament deposition, material deposition

This is the most widely used form of 3D printing with models available at the consumer level as well as the industrial level. This technology builds parts layer-by-layer from the bottom up. It heats and extrudes a thermoplastic filament. Thermoplastics are available with special properties like toughness, translucence, biocompatibility, electrostatic dissipation, UV resistance, and high-heat deflection. The relative weakness of this technology is that you may have visible layer lines and the parts are weaker along the layer lines. Larger FDM machines require compressed air for high-performance plastics.

PolyJet Technology

Similar Technologies/Names: (PolyJet technology), multi-jet printing, photopolymer jetting

PolyJet 3D printers work similarly to traditional inkjet printer, but instead of jetting ink onto paper, the print head jets liquid photopolymers onto a build tray. Each droplet is cured in a flash of UV light. This type of 3D printer can provide sharp precision, smooth surfaces, and very fine details. It can mix photopolymers in specific concentrations to many materials, even rubber, and human tissue. 3D printers with photopolymer jetting make amazing realism with a full gamut of colors.

Stereolithography (SL)

Similar Technologies/Names: (stereolithography), SLA, vat photopolymerization

A used 3D printer with stereolithography (SL) technology is an excellent option for very tight tolerances and smooth surfaces. A UV laser cures and solidifies very fine layers of photopolymer in an open vat with this technology. Designers like this technology for quick build times for strong parts made of transparent, heat-resistant, moisture resistant materials. A relative weakness of this technology is UV sensitivity (parts are often painted for this reason) and extra post-curing steps. 3D printers of this type required dedicated manufacturing space with ventilation and a specialty multi-stage alcohol treatment.

Laser Sintering (LS)

Similar Technologies/Names: (laser sintering), selective laser sintering, SLS, power bed fusion

If you are looking for a used 3D printer capable of building parts with good mechanical properties and extremely complex geometries like undercuts, thin walls or interior features, then finding a laser sintering 3D printer for sale might be your best bet. A laser sintering 3D printer uses a high-powered CO2 laser to melt and fuse powdered thermoplastics selectively. Parts made with this technology can be watertight, airtight and flame retardant since materials can hold excellent isotropic properties – equally strong in all directions.

Metal Powder Bed Fusion (MPBF)

Similar Technologies/Names: (metal powder bed fusion), selective laser melting, metal laser melting, direct metal laser melting

MPBF is a type of 3D printing that makes it possible to produce complex geometries not possible with conventional metal manufacturing processes. It uses a precise high-wattage fiber laser that micro-welds powdered metals and alloys to form components similar to wrought counterparts. Strong and durable parts can be made with additive metals like Inconel, aluminum, stainless steel, and titanium. It’s possible to make features like internal cavities, thin walls, undercuts and interlocking components which are difficult or impossible to make with machining. Usually, this selective laser melting 3D printing is used for prototypes, low-volume runs, or for parts that cannot be cast or machined.

We are a trusted source for used 3D printers, and consistently take in 3D printer trades. Check our inventory and contact one of our experts to help answer any questions or concerns you might have. Our 3D printers are thoroughly inspected and refurbished as needed. Contact us, and we’ll help you find the used 3D printer for sale to meet your needs.

CLICK TO CALL