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Rubber CNC Machining Service
Are you looking for custom rubber parts that fit just right? Our precision CNC machining service can make exactly what you need! We cut, shape, and finish rubber parts with amazing accuracy. Read on to learn how we can help with your rubber part needs.
- Super accurate (within 0.005 inches)
- Custom-made to your exact needs
- Fast to produce without making expensive molds
- Perfect for small batches or one-of-a-kind parts
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Supports uploading of the following file formats: .STEP .STP .SLDPRT .STL .IPT .3MF .3DXML .PRT .SAT .DXF .X_T .X_B .JT .CATPART
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20+ Years
Istar Machining's years in the industry
300,000 square feet
The size of Istar Machining's factory
856 CNC machines
Our CNC equipment count
2000+ skilled workers
Istar's number of skilled machinists/operators
What Is Rubber CNC Machining?
Rubber CNC machining uses computer-controlled tools to cut and shape rubber materials. This gives you parts that are:
- Super accurate(within 0.005 inches)
- Custom-madeto your exact needs
- Fast to producewithout making expensive molds
- Perfect for small batchesor one-of-a-kind parts
At Istar Machining, we use multi-axis CNC technology to create complex rubber parts that simply wouldn’t be possible with basic cutting tools.
Materials We Work With for Rubber CNC Machining
Our CNC machining capabilities extend to a variety of rubber materials, allowing for the precise creation of custom parts like seals, gaskets, pads, rollers, and prototypes. The choice of material depends heavily on the application’s requirements for chemical resistance, temperature range, abrasion resistance, and flexibility.
Here are some of the common rubber materials we can CNC machine:
General Purpose & Widely Used Rubbers
Natural Rubber (NR)
Nitrile Rubber (NBR, Buna-N)
EPDM Rubber (Ethylene Propylene Diene Monomer)
Neoprene® (CR - Polychloroprene)
SBR (Styrene-Butadiene Rubber)
Natural Rubber (NR)
- Key Characteristics: High tensile strength, excellent abrasion and tear resistance, good elasticity, good low-temperature flexibility. Poor resistance to oils, fuels, ozone, and sunlight.
- Common CNC Machined Applications: Vibration dampeners, shock mounts, seals (for non-oil/solvent applications), custom pads, bumpers.
Nitrile Rubber (NBR, Buna-N)
- Key Characteristics: Excellent resistance to petroleum-based oils, fuels, greases, and some solvents. Good abrasion and tear resistance. Moderate temperature range. Poor resistance to ozone and weathering.
- Common CNC Machined Applications: Seals, O-rings, gaskets, fuel handling components, oil-resistant pads, rollers.
EPDM Rubber (Ethylene Propylene Diene Monomer)
- Key Characteristics: Excellent resistance to weathering, ozone, UV light, water, steam, and many chemicals (acids, alkalis). Good electrical insulation. Wide temperature range. Poor resistance to oils and hydrocarbon solvents.
- Common CNC Machined Applications: Outdoor seals and gaskets, weather stripping, automotive cooling system components, water system seals, electrical insulators.
Neoprene® (CR - Polychloroprene)
- Key Characteristics: Good all-around rubber with moderate resistance to oils, ozone, weathering, and flame. Good physical toughness and abrasion resistance.
- Common CNC Machined Applications: Gaskets, seals (especially for refrigeration), weather stripping, vibration mounts, protective covers, custom pads.
SBR (Styrene-Butadiene Rubber)
- Key Characteristics: Similar to Natural Rubber but with better abrasion resistance and aging stability. Good impact strength. Cost-effective. Poor resistance to oils, fuels, and ozone.
- Common CNC Machined Applications: General-purpose seals and gaskets, pads, bumpers, conveyor belt components (custom cleats or features).
High-Performance & Specialty Rubbers
Silicone Rubber (VMQ, MQ, PMQ, PVMQ)
Viton® (FKM - Fluoroelastomer)
Polyurethane (PU - Thermoset or Thermoplastic Elastomer)
Butyl Rubber (IIR - Isobutylene Isoprene Rubber)
Hard Rubber / Ebonite
Silicone Rubber (VMQ, MQ, PMQ, PVMQ)
- Key Characteristics: Excellent high and low-temperature resistance (-60°C to +230°C, some grades higher). Good electrical insulation. FDA-compliant grades available. Inert and tasteless. Lower tensile strength and tear resistance compared to other elastomers.
- Common CNC Machined Applications: High-temperature seals and gaskets, O-rings, medical device components, food processing equipment parts, electrical connector seals, flexible molds.
Viton® (FKM - Fluoroelastomer)
- Key Characteristics: Exceptional resistance to high temperatures, oils, fuels, solvents, chemicals, and ozone. Low gas permeability. Expensive.
- Common CNC Machined Applications: Seals, O-rings, and gaskets for aggressive chemical and high-temperature environments (aerospace, automotive fuel systems, chemical processing).
Polyurethane (PU - Thermoset or Thermoplastic Elastomer)
- Key Characteristics: Excellent abrasion and tear resistance, high tensile strength, good load-bearing capacity, good resistance to oils and some solvents. Wide range of hardness available.
- Common CNC Machined Applications: High-wear pads, rollers, wheels, seals (especially for hydraulic systems), shock absorbers, custom scraper blades, forming dies. (Harder grades are generally easier to machine).
Butyl Rubber (IIR - Isobutylene Isoprene Rubber)
- Key Characteristics: Excellent impermeability to gases and moisture. Good resistance to weathering, ozone, and many chemicals. Good shock absorption.
- Common CNC Machined Applications: Seals for vacuum applications, liners, shock and vibration damping pads, some types of gaskets.
Hard Rubber / Ebonite
- Key Characteristics: Very rigid, vulcanized rubber with a high percentage of sulfur. Excellent electrical insulation, good chemical resistance, and highly machinable.
- Common CNC Machined Applications: Electrical insulators, pipe stems, musical instrument mouthpieces, custom fixtures, rollers.
Foam & Sponge Rubbers
Silicone Sponge/Foam
EPDM Sponge/Foam
Neoprene Sponge/Foam
Silicone Sponge/Foam
- Key Characteristics: Similar temperature resistance and inertness to solid silicone, but with added compressibility.
- Common CNC Machined Applications: Soft gaskets, seals for uneven surfaces, thermal insulation pads, cushioning.
EPDM Sponge/Foam
- Key Characteristics: Excellent weather and ozone resistance, good compressibility.
- Common CNC Machined Applications: Weather stripping, environmental seals, acoustic insulation, cushioning pads.
Neoprene Sponge/Foam
- Key Characteristics: Good balance of oil resistance, weather resistance, and compressibility.
- Common CNC Machined Applications: Gaskets, seals, cushioning, vibration damping.
CNC Products Produced by Istar Machining
How We Make Your Rubber Parts
Our CNC rubber cutting process follows these steps:
Material Selection
We help you pick the right rubber for your needs
Computer Design
We create or use your 3D design file
Toolpath Planning
We plan the best way to cut your part
CNC Machining
Our machines precisely cut the rubber
Finishing
We smooth edges and check the part
Quality Testing
We make sure everything meets your needs
What Makes Our Rubber Parts Special
Precision You Can Trust
Our CNC machines can make rubber parts within ±0.005″ of your specifications. That’s about the thickness of a human hair! This makes our parts perfect for:
- Tight-fitting sealsthat don’t leak
- Medical componentsthat must be exact
- Complex shapeswith special features
Materials for Every Need
We work with rubber in many hardness levels (from soft 20A to firm 90A Shore hardness). This means we can make:
- Soft, squishy partsthat absorb vibration
- Medium-firm sealsthat stand up to pressure
- Harder rubber componentsthat resist wear
Size Flexibility
We can make rubber parts up to 24″ x 12″ x 8″ in size. Whether you need tiny O-rings or large industrial seals, we’ve got you covered!
Why Choose CNC Over Other Methods?
There are several ways to make rubber parts. Here’s why CNC machining is often the best choice:
Method | Advantages of CNC |
Injection Molding | No expensive molds needed – save money on small runs |
Die Cutting | Can create complex 3D shapes, not just flat parts |
Hand Cutting | Much more precise and repeatable |
3D Printing | Better material properties and durability |
Case Study: Solving a Tough Problem
A medical device company needed special silicone seals that could stand up to sterilization. The parts had complex shapes with tiny grooves. Traditional methods couldn’t make these parts with enough precision.
Our solution: Using our 5-axis machining technology, we created perfect silicone seals that:
- Kept fluids from leaking
- Survived hundreds of cleaning cycles
- Fit perfectly every time
- Met all FDA requirements
The result? The company’s devices worked better and lasted longer!
Our Technical Capabilities
Here’s what our rubber CNC machining can do:
- Materials: 20+ types of rubber with Shore hardness from 20A to 90A
- Maximum Part Size: 24″ x 12″ x 8″
- Tolerances: ±0.005″ standard, ±0.002″ for high-precision needs
- Surface Finishes: Smooth, textured, or with special coatings
- Lead Times: 3-5 days for prototypes, 2-4 weeks for production runs
- Certifications: ISO 9001, ISO 13485, RoHS compliant materials available
Why Choose Istar Machining?
We’re not just any machine shop. We’re experts in rubber CNC machining with:
- Years of experienceworking with all types of rubber
- Advanced machinesthat can create complex shapes
- Quality controlthat ensures perfect parts every time
- Fast turnaroundfor when you need parts quickly
- Competitive pricingthat fits your budget
Ready to Start Your Project?
Getting custom rubber parts is easy with Istar Machining:
- Send us your design– CAD files work best, but we can work from sketches too
- Get a quick quote– Usually within 24 hours
- Approve production– We’ll make sure everything is perfect
- Receive your parts– On time and ready to use
Don’t settle for rubber parts that almost fit. Get exactly what you need with our custom CNC machining services!
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