PARTS IN  1-3 DAYS

Quotes On Turned Parts

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

“We are extremely happy with the quality of parts
received as well as the level of service…Thanks!”
–Micah H., VP Product Development

“Finding Prototek by chance was like hitting
the Strategic Sourcing Easy Button.”
Brian H., Senior Designer

“On time and to Spec. To EVERYONE involved
producing quality parts a hearty thanks.”
Jim T., Senior Product Engineer

“Fastest quoting & delivery I’ve ever
experienced, & the parts look great!”
John H., Lead Mechanical Engineer

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

Licenses, certifications
and real turned parts service

Expertise and quality are paramount. With more than three decades of experience turning 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 turned parts 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

certifications sam

Prototek FAB 40 2020 award

D&B Number Prototek

Turned Parts – Working with PROTOTEK

Deep capabilities in sheet metal and machining – design, turning 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 turned parts 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 turned parts services & other 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

Definition of Turned Parts

Turned parts are used in different sectors such as automotive, electronics, marine, appliances and telecommunications (just to name a few). These types of parts are created by a turning machine (e.g., lathe) at a high rotating speed. Turned parts can be made of many different kinds of material such as titanium and stainless steel (see a full list of materials below).

Turned parts, also called machined components, are created by a process called turning (often done with Computer Numerical Control, CNC). CNC turning allows for advanced designs and features. This turning process is also cost-effective and creates turned components with precise depth and dimension.

The CNC turning process is carried out using a CNC machine called a CNC lathe which sometimes comes with multi-spindles. Hence, it can work on several workpieces simultaneously at high production rates.

Turned Parts Material List

MaterialGrade / AlloyHeat TreatableTensile Strength (Ultimate, PSI)Fatigue Strength (PSI)Hardness (Brinell)CNC Machinability (AISI Rating)
MaterialGrade / AlloyHeat TreatableTensile Strength (Ultimate, PSI)Fatigue Strength (PSI)Hardness (Brinell)CNC 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

How Turning Differs from Milling and Boring

Turning: The term turning is a machining process where machines such as lathes remove parts of a rotating workpiece with a cutting device. For this process to work, the workpiece must be attached to a turning machine that rotates it while the cutting tool remains static and is used to scrape unwanted material – thus creating the desired shape.

Milling: Unlike turning, milling is a machining process whereby a machine (in this case, a milling machine) uses a rotating cutting tool to remove material from a static workpiece. Both milling and turning operate using the same principle – a cutting tool pressing against an object and scraping material from it. However, the difference between these two machining processes is in their use of rotation. While the workpiece rotates in turning operations, the cutting tool rotates in milling operations.

CNC Lathe Milling Options Available:

3-Axis Lathe – In 3-axis CNC milling, the workpiece remains motionless while the cutting tool mills along three different axes. 3-Axis milling machine applications include contoured shapes, hole features and sharp edges.

4-Axis Lathe – With 4-axis CNC milling, the CNC machine operates on multiple axes, with an additional rotation around one of the axes. This additional rotation is called the A-axis. It is used to create cut-outs on the side of a workpiece.

9-Axis Lathe – The 9-axis CNC machine is similar in basic capabilities to the 5-axis machine but also includes angle milling, balance turning and more. 9-axis machines use both the B-axis and additional tools to create complex parts.

Boring: Like turning, boring is another machining process involving a stationary non-rotating cutting tool to remove parts of a workpiece. However, the difference between these two machining procedures is that the cutting tool removes material inside the workpiece in boring. In other words, boring involves drilling holes in objects using a cutting tool that looks like a drill bit. While turning operations can only be carried out with a lathe, boring operations can be done using a lathe, boring milling machine, or a conventional milling machine.

The table below shows the main differences between turning, milling, and boring.

TurningMillingBoring
Removes external materials from a workpiece using a cutting toolRemoves external material from a workpiece using a cutting toolRemoves material from the internal component of a workpiece (drilling holes inside objects)
The workpieces rotates while the cutting tool remains staticThe cutting tool rotates while the workpiece is stationeryThe workpiece rotates while the cutting tool remains stationery
Can only be done with a latheDone using a milling machineCan be done with either a lathe or a milling machine

CNC Swiss Machine vs. CNC Ganesh Machine

CNC Swiss machines and CNC Ganesh machines are similar in that they can both handle similar types of turned parts production. They can hold a larger number of tools and are great for making smaller precision parts. The difference is in how the machines hold the materials. With a CNC Ganesh machine, you can make smaller diameter parts that you can’t make on a CNC lathe machine.

CNC Machining Machines, Part Sizes and Precision Tolerances

Here are the machines / CNC lathes we use to turn parts:

Machine TypeMachining MethodXYZ Machining LimitsPrecision / Repeatability (in.)AxisBrand / Description
Machine TypeMachining MethodXYZ Machining LimitsPrecision / Repeatability (in.)AxisBrand / Description
Mill-Turn CNC Multi-Axis Bar capacity: 2.6" - Main Spindle Std Chuck: 6" Main Spindle Max Chuck: 8″ - Max turning diameter: 21.25" Max turning length: 40.15" ±0.00008 9-Axis Doosan
Mill-Turn CNC Multi-Axis Bar capacity: 2.6" - Chuck capacity: 8" - Swing: 9.1" Max turning diameter 9" - Max turning length: 27.4" X & Z-axis: ±0.00008 Y-axis: ±0.00012 C-axis: ±0.006° 8-Axis Doosan
Mill-Turn CNC Multi-Axis Bar Capacity: 2.6" - Chuck capacity: 8" - Swing: 21.6" Max turning diameter: 13" - Max turning length: 20.1" X & Z-axis: ±0.00008 Y-axis: ±0.00012 C-axis: ±0.006° Y-Axis Daewooo
Turning CNC Lathe Bar capacity: 2" - Chuck capacity: 6.5" - Swing: 20" Max turning diameter: 9.8" - Max turning length: 20" X & Z-axis: ±0.00008 C-axis: ±0.006° Daewooo
Turning Manual Lathe Chuck capacities: 8" / 10" - Spindle Bore: 2" - Max Swing: 16" Swing-over Gap: 24" - Dist Between Centers: 40" N/A - Acra-Turn
Turning Manual Lathe Chuck capacities: 6" / 8" - Max Swing: 13" Swing-over Gap: 18.75" - Dist Between Centers: 40" N/A - Atrump
Turning CNC Lathe Bar capacity: 2.6" - Chuck capacity: 8" - Max Swing: 26.6" Max turning diameter: 14.76" - Max turning length: 21.28" Positioning accuracy: ±0.0002 Repeatability: ±0.0001 3-axis Mazak
Turning CNC Lathe Bar capacity: 2.0" - Chuck capacity: 8" - Max Swing: 10" Max turning diameter: 12" - Max turning length: 18.8" Positioning accuracy: ±0.0002 Repeatability: ±0.0001 3-axis Hurco
Turning Manual Lathe ±0.005 - Hardinge
Turning Manual Lathe ±0.005 - Enco
Turning Manual Lathe N/A ±0.005 - Hardinge
Turning CNC Lathe Bar capacity: 2.36" - Chuck capacity: 8" - Max Swing: 18" Max turning diameter: 14" - Max turning length: 40" ±.00018 - Trak Lathe

Custom Turning Options

With any turning project, there may be customizations that are requested or required. Here are a few elements that create a more custom turned part scenario.

Shapes – Sometimes, the turning process is used on a workpiece to create a particular shape. The overall shape of the end part, created according to the manufacturer’s needs, will dictate how custom the job will be and the overall cost of the turned part.

Grooves – Grooving is a turning operation that forms narrow cavities (grooves) of specific depth on the external or internal surface of the workpiece. It is a machining process carried out with a CNC lathe. However, the shape of grooves is dependent on the cutting tool shape. Not all turned parts require grooves. When they are required, they can increase the custom nature of the job.

Holes – Hole-making is the process of using machines to create cavities (holes) in a workpiece. It is a material removal process that requires a machine, cutting tool, and workpiece. Hole-making can be done with a variety of machines, such as CNC milling or CNC turning machines. However, specialized equipment such as drill presses or tapping machines can be used for hole-making. In such situations, additional tooling may be necessary, creating a custom turned part situation.

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 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

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.