Injection molded parts

Manufacture high volumes of strong, durable plastic injection molded parts with consistent quality.

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Injection molding

Order custom plastic injection molded parts

Ideal for high volume production requirements, the injection molding process enables manufacturers to create consistent high quality parts quickly. During production, molten thermoplastic pellets are injected into a metal mold, cooled, and ejected as a fully formed part ready for industrial end-use. 

Ordering injection molded parts from Fast Radius is simple: upload your design to our Cloud Manufacturing Platform™, work with our engineers to optimize your project, and then begin production when you’re ready for delivery on-demand.  

Explore our full range of injection molding manufacturing capabilities, including multi-cavity molding, insert molding and overmolding services. 

Our injection molding capabilities

We offer the following injection molding services:


Insert molding

Insert molding involves the injection of molten thermoplastic around a pre-placed insert to create strong, durable parts quickly and cost-effectively.



Overmolding is an injection molding process in which multiple shots of thermoplastic are injected over or around a substrate to create highly customized parts.

Single cavity vs. multi cavity injection molding Listing

Multi-cavity/family molds

Multi-cavity molds and family molds, enable the production of multiple injection molded parts from a single shot of thermoplastic.

Injection molding applications

Precise, consistent, and cost-effective, injection molding parts serve a variety of industrial applications:

High volume production

Injection molding is ideal for high-volume production runs of identical plastic parts – and becomes more cost-effective with larger orders.

Ergonomic features

Injection molding enables the production of ergonomic design characteristics such as grips, buttons, and knobs.

Customer end-use

Use injection molding to create durable parts for demanding customer end-uses, including scissors, screwdrivers, remote control coverings, and case assemblies.

Aerospace and automotive

Injection molded parts can be manufactured to meet precise tolerance and functionality requirements for applications in the aerospace and automotive industries.

Why choose injection molding for your parts?

Turnaround times

Turnaround times

Depending on order specifications, lead times for setting up an injection molding production run can be as low as 2 weeks for sample approval, and 1 week post-sample approval.

Plastic parts


After initial tooling, the injection molding process allows manufacturers to scale quickly and easily for cost-effective high volume production.

Injection molding parts

Material choices

Choose from a wide range of thermoplastic materials, offering different qualities, such as strength or biocompatibility, to suit your project’s requirements.



Tailor your injection molded parts to their specific end-use with finishing and post-processing options including painting, ultrasonic welding, and texturing.

Get a quote for your injection molded parts

Create a Fast Radius account for rapid quotes on parts production.

Design considerations

Optimize your injection molded parts with the following design considerations, and browse production material, finishing, and post-processing options.

General process information
Maximum part size​800 x 800 x 400 mm
31.5 x 31.5 x 15.7 in
Minimum part size1 x 1 x 1 mm
0.04 x 0.04 x 0.04 in
ToleranceBest achievable tolerance: ±0.001″ (0.025mm)
Standard: ±0.005″ (0.127mm)
For larger part tolerances please contact a Fast Radius engineer
Lead timeAs low as 2 weeks for T1 samples
After T1 sample approval, lead time for < 10,000 parts is as low as 1 week
Tool validationStandard process is to produce a small set of T1 samples for approval before initiating full production
Maximum press size1600T
Minimum order size100 parts and $5000
Set-up fee$500 per mold per order (applies to sample runs after initial T1 samples or engineering changes)
Tooling information
Rapid toolingMolds with steel cavity and core with a shot life of 5,000-10,000 shots
Typically machined in 2 weeks
Production toolingSteel tool with shot life up to 1M shots
Ability to integrate side-pulls or cam-actions
Typically machined in 3 weeks
Multi-cavity or family moldsMultiple identical cavities or family of parts machined into a single tool
Allows for more parts to be produced per shot, minimizing unit costs
Insert moldingInserts are placed into the mold and molding occurs around them to extend tool life for critical features
Allows for inserts such as helicoils to be molded in your design
OvermoldingPremade parts are placed into the mold and molded over
Allows for multi-material injection molding
Injection molding materials
Most common materialsOther supported materialsAdditives and fiber
Acrylonitrile Butadiene Styrene (ABS)Nylon (PA 6, PA66, PA 12)UV absorbers
Polyethylene (PE)Polycarbonate/Acrylonitrile
Butadiene Styrene (PC/ABS)
Flame retardants
Polypropylene (PP)Polyurethane (PU)Plasticizers
Polycarbonate (PC)Polymethyl Methacrylate
High Density Polyethylene (HDPE)Glass fibers
Low Density Polyethylene (LDPE)
Polystyrene (PS)
Polyvinyl chloride (PVC)
POM (Acetal/Delrin)
Polyethylene Terephthalate (PET)
Thermoplastic Elastomer (TPE)
Thermoplastic Vulcanizate (TPV)
Polyetherimide (PEI)
Polysulfone (PSU)
Inquire for additional options
Colors, finishing, post-processing
ColorsFinishing and post-processing options
Pantone color matchingStandard SPI finishes (A2-D3)
RAL color matchingMold-tech textures also available
Pad printing
Inserts (insert molding)
Light assembly
Protective packaging / film

Why choose Fast Radius for injection molding?

Quality manufacturing

Quality manufacturing

We manufacture high quality injection molded parts to meet industrial strength, durability, and tolerance requirements.

Industry Leading Experience

Industry expertise

Access a team of manufacturing and engineering experts that care about your project, and will work with you from concept to fulfillment.

World Economic Forum

Innovation and agility

Our injection molding services are powered by innovation: the World Economic Forum has recognized Fast Radius as one of the most innovative factories in the world.


Global reach

A global network of production partners and logistics hubs ensures the fastest possible shipping times. Our partnership with UPS gives us the power to move products around the world with ease.

Factory of the Future

The factory of the future

The Fast Radius Cloud Manufacturing Platform™ combines digital design technology with cutting-edge expertise to make your projects possible. 

Fast Radius manufacturing capabilities

Fast Radius manufacturing solutions serve the needs of businesses across the industrial landscape. Explore our capabilities:

3D printing

Fast, scalable, and cost-effective 3D printing technology for a variety of industrial applications.

CNC machining

Automated CNC turning and 3-axis and 5-axis milling, using rotating drills, end mills, and lathes.

Injection molding

Cost-effective plastic injection molding for precision, high-volume production runs.

Urethane casting

Versatile mold-casting for the production of urethane parts customizable with colors and textures.