PARTS IN  1-3 DAYS

Quick-Turn Machined Parts

We don’t have minimums, we love complex jobs, we deliver the best parts for your money and we hit your deadlines!

Amazing companies choose PROTOTEK for high-quality parts done fast!

Licenses, certifications
and real machining service

Expertise and quality are paramount. With more than three decades of experience in machined parts we’ve achieved a rich set of certifications and provide high-touch attention and service to every quote – and every job.

We work differently than other services and ask questions to help our customers build better and more cost-effective parts before we start manufacturing. We want to be your one-stop shop for machined parts and services, so we focus on doing every part, even ones that other companies ‘No Bid’ for complexity. Most of our business is from returning customers and to achieve that, we strive to hit our customers deadlines across all project types.

iso certification intertek

sam certified

Prototek FAB 40 2020 award

D&B Number Prototek

Machined Parts – Working with PROTOTEK

Deep capabilities in sheet metal and machining – design, machined parts, manufacturing, finishing, and even complex assemblies.

What do we do?

  • Sheet Metal Parts & Assemblies in as Fast as 1-3 Days
  • CNC Milled and Turned Parts in as Fast as 1-3 Days
  • Complex Parts
  • Same Day or Emergency Jobs – Call us Now!

About our fast, flexible personalized service:

  • ISO-9001:2015 Certified, ITAR Registered
  • Quotes within 24 Hours – Call us if you need it faster!
  • Estimates with or without CAD Models
  • We Want Complex Jobs – We Quote Parts Others Reject

Because every job is unique, and many require special considerations for materials, finishing, custom work, and/or urgent delivery – our machined parts services quotes are turned around by seasoned estimators who confirm all aspects of your job. No automated quoting that works on cookie-cutter algorithms here to limit your project or your imagination. We figure out the best way to run your job first – and that’s why we deliver so many jobs that other shops turn away.

Our machined parts capabilities start below but they don’t stop there. Want to talk to someone about a job, upload a file for quote or call us now.

NO CAD MODEL, NO PROBLEM
QUOTES WITHIN 24HRS

PARTS & ASSEMBLIES – ONE STOP SHOP

NO ORDER TOO SMALL

EXPEDITED PARTS IN 1-3 DAYS

Why Prototek?

PROTOTEK's Capabilities

Sheet Metal

  • Manufacturing Design Assistance
  • Laser Cutting - Punching
  • Material Graining
  • Drilling - Countersinking - Tapping
  • Forming - Bending
  • Hardware Insertion
  • Mechanical Assembly
  • TIG, MIG, Spot Welding & Weld Grinding
  • Welded Assemblies & Frames

Machining

  • Up to 5-Axis Milling
  • Horizontal & Vertical Milling
  • 9-Axis Mill-Turn
  • Turning
  • CNC Routing
  • Surface Grinding
  • Lapping & Polishing
  • Welding / Post-Weld Machining
  • Heli-Coils / Hardware Inserts

Cutting & Engraving

  • Wire EDM Cutting
  • Waterjet Cutting
  • CO2 Laser
  • Fiberoptic

Quality Assurance

  • Quality Engineering Assistance
  • CMM Inspection Services
  • First Article and AQL Inspections
  • Compliance and Document Control

Plastic & Composite Fabrication

  • Plastic Thermoforming - Bending
  • Annealing
  • Cryogenic Deflashing & Deburring
  • Plastic Welding
  • Thermal, Adhesive, & Mechanical Bonding
  • Vapor Polishing
  • Radiological Film-Cutting Services

Assembly

  • Manufacturing Design Assistance
  • Tooling and Fixture Fabrication
  • Electro-Mechanical Services
  • Welded, Mechanical, & Small Parts Assembly
  • Wire Harnessing
  • Laser Cutting – Polymers & Metals
  • Insert Installation

Finishing

  • Powder Coating
  • Painting
  • Chemical Agent Resistant Coating
  • Silk Screening
  • Laser Engraving
  • Chem Film
  • Anodizing
  • Black Oxide
  • Bead Blasting
  • Tumbling

Guide to Custom Machined Parts

Custom CNC machining services are a cost-effective and efficient way to have custom parts created. CNC milling and turning machines have made it easier than ever to create parts out of almost any material and customize them with a variety of features and shapes.

CNC Machining, Milling and Turning for Machined Parts

Computer Numerical Control (CNC) machining is a manufacturing process for machined parts in which factory equipment and machinery are controlled by pre-programmed computer software. It can be used to operate a wide variety of complex machinery, including grinding, routing, milling and lathing. Three-dimensional cutting tasks can be completed in a single set of prompts with CNC machining. CNC machining is commonly used for creating custom milled and turned parts.

Milling parts is the process of machining using rotary cutters to remove material by advancing a cutter into a workpiece. This method is very flexible and can be used in varying directions on one or multiple axes, cutter head speeds and pressures. Milling machines developed into “machining centers” after the introduction of CNC in the 1960’s. Machining centers are milling machines with automatic tool changers, tool magazines or carousels, CNC capacity, coolant systems and enclosures.

Turning parts, on the other hand, is a machining method in which a cutting tool, usually a non-rotary tool bit, moves more or less linearly as the workpiece rotates, describing a helix toolpath.

Live tooling for lathes and the occasional use of mills for turning operations started the introduction of milling into turning environments, and vice versa. This resulted in the creation of a new class of machine tools known as multitasking machines (MTMs), which are specifically designed to allow milling and turning within the same work envelope.

Materials Used for Machined Parts

Machined Parts Material Grade / Alloy Heat Treatable Tensile Strength (Ultimate, PSI) Fatigue Strength (PSI) Hardness (Brinell) Machinability
 (AISI Rating)
Machined Parts Material Grade / Alloy Heat Treatable Tensile Strength (Ultimate, PSI) Fatigue Strength (PSI) Hardness (Brinell) Machinability
 (AISI Rating)
Aluminum 1100-0 No 13000 5000 23 360%
Aluminum 1100-H112 No 13000 4600 23 360%
Aluminum 1100-H14 No 18000 7200 32 360%
Aluminum 2011-T3 Yes 52000 1800 95 360%
Aluminum 2011-T451 Yes 45000 11000 95 360%
Aluminum 2024-0 Yes 27000 13000 47 360%
Aluminum 2024-T3 Yes 63800 20000 120 360%
Aluminum 2024-T351 Yes 57300 20000 120 360%
Aluminum 2024-T3511 Yes 67000 18000 120 360%
Aluminum 2024-T4 Yes 45000 20000 120 360%
Aluminum 2024-T851 Yes 75000 20000 140 360%
Aluminum 3003-H14 No 23000 8700 42 360%
Aluminum 3003-H22 No 20000 10000 37 360%
Aluminum 5052-0 No 28000 16000 47 360%
Aluminum 5052-H112 No 29000 11000 55 360%
Aluminum 5052-H32 No 34000 17000 60 360%
Aluminum 5052-H34 No 37000 18000 68 360%
Aluminum 5083-H112 No 44000 16000 75 360%
Aluminum 5083-H116 No 47000 23000 83 360%
Aluminum 5086-H111 No 40000 15000 65 360%
Aluminum 5086-H112 No 39000 14000 69 360%
Aluminum 5086-H116 No 44000 22000 81 360%
Aluminum 6020-T8 Yes 43900 N/A 100 360%
Aluminum 6061-T6 Yes 45000 14000 93 360%
Aluminum 6061-T651 Yes 46000 14000 93 360%
Aluminum 6061-T6511 Yes 42000 15000 95 360%
Aluminum 6063-T52 Yes 25000 9700 60 360%
Aluminum 6262-T9 Yes 57000 13000 120 360%
Aluminum 7050-T7451 Yes 76000 30000 140 360%
Aluminum 7050-T7651 Yes 80000 31000 147 360%
Aluminum 7075-T6 Yes 83000 23000 150 360%
Aluminum 7075-T651 Yes 80000 23000 150 360%
Aluminum 7075-T73 Yes 72000 23000 140 360%
Aluminum 7075-T7351 Yes 73000 24000 140 360%
Aluminum 7475-T7351 Yes 72000 28000 135 360%
Aluminum K100-S No 41000 N/A 70 450%
Aluminum M-1 No 42900 N/A 85 450%
Aluminum MIC-6 No 23900 N/A 65 450%
Bearing Bronze C93200 No 34800 16000 65 70%
Brass C26000 No 46000-99000 14000 210 30%
Brass C36000 No 4800-77000 16000 78 100%
Brass C46400 No 55000 - 88000 14500 82 30%
Bronze C31400 Yes 40000-60000 N/A 56-59 80%
Carbon Steel A36 Yes 80000 N/A 119-159 72%
Copper C11000 No 25000-29000 11000-17000 82-92 60%
Copper C14500 No 47900 13000 60-130 85%
Phosphor Bronze C54400 No 47000-100000 N/A N/A 80%
Silicon Aluminum Bronze C64200 No 75000-102000 50000 N/A 60%
Stainless Steel 15-5PH Yes 115000-190000 95000-160000 255-388 45%
Stainless Steel 17-4PH Yes 115000-190000 75000-90000 255-388 45%
Stainless Steel 17-7PH Yes 170000 42000 180 75%
Stainless Steel 303 Yes 87000-100000 33000-52000 170-210 75%
Stainless Steel 304 Yes 84000-170000 30000-63000 170-360 40%
Stainless Steel 304L Yes 78000-170000 25000-62000 160-350 40%
Stainless Steel 316 Yes 76000-170000 30000-63000 160-360 36%
Stainless Steel 316L Yes 77000-170000 25000-65000 170-350 36%
Stainless Steel 321 Yes 85000-10000 32000-40000 170-210 36%
Stainless Steel 347 Yes 89000-100000 32000-40000 160-201 36%
Stainless Steel 410 Yes 76000-110000 28000-50000 190-240 54%
Stainless Steel 416 Yes 75000-120000 33000-50000 230-320 50%
Stainless Steel 420 Yes 100000-250000 33000-97000 190 50%
Stainless Steel 420F Yes 110000 39000 230 68%
Stainless Steel 430 Yes 75000 45000 160 66%
Stainless Steel 430F Yes 79800 30000 170 75%
Stainless Steel 440C Yes 100000-290000 38000-120000 222 40%
Steel 1018 Yes 63000-70000 26000-38000 130-140 78%
Steel 1045 Yes 90000-98000 33000-53000 180-190 57%
Steel 1215 Yes 78300 N/A 167 136%
Steel 4140 Yes 100000-160000 N/A 200-310 66%
Steel 11L17 Yes 86300 N/A 179 9%
Steel 12L14 Yes 78300 28000-41000 163 198%
Titanium 6AL-4V Yes 131000 74000 334 22%
Titanium 6AL-4V ELI Yes 125000 20300 326 22%
Titanium 3Al 2.5 No 89900 24700 256 N/A

Types of Milling Involved with Machined Parts

One of the advantages of milling in the machining of parts is its versatility. There are many types of milling that can create a diverse range of custom milled parts.

  • Machined Parts with 3-Axis Machining

    When cutting involves synchronized coordinated movement of the X, Y and Z axes, 3-axis milling is used. While it is still used in some milling facilities today, it is less advanced than other commercially available milling techniques.

  • Machined Parts with 4-Axis Machining

    This method is one of the most popular milling techniques, because it’s more advanced and versatile than 3-axis milling but less costly than 5-axis machining. There are two options: four-axis simultaneous interpolation or four-axis positioning, in which the fourth axis will reposition the part between three-axis operations but does not shift during the machining.

  • Machined Parts with 5-Axis Machining

    A CNC machine can rotate a tool on five axes with this machine, which uses two additional rotary axis movements. The tool can travel along the X, Y and Z axes, as well as rotate on the A and B axes, enabling the machine to reach a workpiece from either direction.

  • Machined Parts with 9-Axis Machining

    The 9-axis CNC machine combines lathe and 5-axis machining. The component can be turned and multi-axis milled in one setup thanks to its nine usable axes. The removal of manual loading and secondary fixtures is the most significant advantage of this machine. 9-axis CNC mill turns can complete a part from start to finish with ease.

  • Machined Parts with Horizontal Machining

    The spindle on horizontal milling machines has a horizontal orientation. Horizontal milling machines selectively extract material from a stationary workpiece by mounting the cutting tool on a horizontally oriented spindle.

  • Machined Parts with Vertical Machining

    A vertical milling machine, the most common form of milling machine, has a vertically oriented spindle that both holds and rotates the cutting tool against the stationary workpiece. The spindle will go up and down when removing material from the workpiece by pushing against it.

Custom CNC Turning for Machined Parts

CNC turned parts can easily be customized with a variety of features:

  • Shapes:

    There are a variety of insert shapes for turning, each with its own purposes and ideal uses. Insert shapes range from a perfect circle to a diamond shape. The ideal shape will depend on the part’s contours, the spindle power required to cut the material, vibrations during cutting, and the strength of the insert versus the material. A custom CNC machining shop can assess your project and materials to determine the best option.

  • Grooves:

    Grooving is a term used to describe the method of creating a narrow cavity of a specific depth on a cylinder, cone, or face of a component. CNC turning machines may make grooves, which are typically used to allow another part to move within and be driven by the groove.

  • Holes:

    Holes can be added to custom milled or turned parts, including standard holes, threaded holes, and even key inserts.

Contact us for your machined parts needs.

We ship parts ANYWHERE in the US
in as little as 1-3 days!

We ship parts ANYWHERE in the US in as little as 1-3 days!

We have 4 locations that cover the US

West Coast Silicon Valley Prototek Location

West Coast / Silicon Valley Location
215 Devcon Dr.,
San Jose, CA 95112

Mid West Location
900 Cheyenne Ave.,
Grafton, WI 53024

East Coast Location
244 Burnham Intervale Rd.,
Contoocook, NH 03229

East Coast Location
205 Pine St.,
Hopkinton, NH 03229

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Frequently Asked Questions

Are you a broker or a manufacturer?

We are a full service sheet metal and machining manufacturer with four U.S. production facilities across the nation allowing us to deliver your high-quality parts FAST.

Does PROTOTEK manufacture in higher-volume quantities?

We focus on prototypes to low-volume production and can do larger runs. All our parts, from one – to 100 – to 1,000+ are always delivered with production-quality finish.

What are your payment terms?

PROTOTEK offers Net 30 payment terms for established customers with good credit.

What file formats are required or suggested for requesting a quote?

We accept .STP, .DWG, .IGS, .PDF, Parasolid files, and more.

What if I need help with my part design?

Our estimators are on hand to discuss your specific job needs. Our expert team can help you move your project smoothly through the design process and on to delivery.

If I do not have a CAD model, can you quote/fabricate my parts?

Yes, we can work directly from your drawings. Additional engineering charge (NRC) may apply depending on complexity.

How do I submit my NDA and other document requests?

Submit your NDA, Approved Vendor and other document requests to your sales rep or estimator.

How long is a quote valid?

Our quotes stand firm for 7 days from the date of issue.

How fast can I get my order?

Lead time for standard orders is 10 business days. Expediting options are available, including emergency service – down to as fast as 1-2 business days, depending on complexity of work and materials.