Custom Powder Coating for Metal Parts
Get your custom metal parts cut and powder coated through our network of qualified manufacturing partners. Upload your CAD files or drawings to get pricing for prototypes, low-volume runs, and production quantities.
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How OpenSpindle works
We tap our partner network. You get the best-match quote.
Upload your part and we tap our network of partner shops to get you a competitive, all-in quote that is the best match for the job.
One upload
A CAD file or a sketch. That is the whole ask on your end.
Your best-match quote
Sourced from the partner shops set up for your exact part.
All-in, on your timeline
Machining, finishing, and shipping detailed to your turnaround.
Finishes our coating shops run
The same laser-cut bracket in each finish, so you can read color, gloss, and texture on one reference part. Shops stock the common colors below and can order specific RAL or custom powders. If your color is not here, ask when you request a quote.
Semi-gloss textured black
Most popular · ~50% gloss
Gloss black
~90% gloss
Matte black
0-9% gloss
Wrinkle black
Textured · hides fingerprints
Metallic gunmetal
~75% gloss · metal flake
Gloss gray
~87% gloss
Gloss white
~90% gloss
Gloss blue
~85% gloss
Gloss green
~85% gloss
Gloss red
~90% gloss
Gloss yellow
~90% gloss
Design rules
How to design for Powder Coating
Powder coating is a finish, so the design rules are about thickness allowance and masking, not part geometry.
| Design rule | Typical spec | Why |
|---|---|---|
| Coating thickness | adds ~0.002 to 0.004 in per side | Account for it on threads, bores, and mating faces. |
| Masking | mask threads, mating faces, grounds | Powder must be kept off functional surfaces. |
| Grounding point | leave one bare hang/ground point | The part must ground to attract the charged powder. |
| Edge coverage | radius sharp edges | Powder thins on sharp edges and corners. |
| Pre-treatment | clean and phosphate first | Adhesion fails on oily, rusty, or dirty surfaces. |
Guidelines; tell the shop which surfaces must stay bare or hold tolerance.
Reference
Related reference charts
Free spec + tolerance charts for designing these parts.
Process comparison
Powder coating vs other finishes
When another finish fits better than powder coat.
| Process | Best for | Typical volume | Choose it over powder coating when |
|---|---|---|---|
| Anodizing | Aluminum, thin and hard finish | Any | The part is aluminum and you want a thin, hard, dimensionally-stable finish. |
| Wet Paint | Widest color and gloss range | Any | You need a specific color match or field touch-ups. |
| Plating | Conductivity, wear, corrosion | Any | You need a conductive or very hard metallic surface. |
Get a better quote
Getting a quote that comes back fast
| Instead of | Send this |
|---|---|
| "Powder coat it black" | "Gloss black (RAL 9005), mask the 2x tapped M6 holes, per drawing" |
| "Make it hold up outside" | "Outdoor polyester, textured black, UV-stable, qty 40" |
| "Coat these brackets" | "6061 brackets, semi-gloss black, mask the bearing bore, chase threads after" |
Give the color (a RAL number is ideal), the gloss or texture, and any threads or bores to mask. That is what sets the price and avoids a re-do.
Applications
Industries we serve
Powder coating shops on OpenSpindle finish brackets, frames, panels, and enclosures for demanding indoor and outdoor use.
More on OpenSpindle
Need a different process?
Get a quote for these capabilities too.
Designing for this process
What actually changes your quote
Not a definition of powder coating. The design choices that move your price, durability, and finish.
Mask threads and bores
Coating adds 0.002 to 0.005 in per side and buries threads. Call out tapped holes, dowel pins, and bearing bores to mask, or plan to chase and ream them after coating so parts still fit.
Leave a hanging point
Parts hang on a hook to be sprayed and baked. A spare hole about 0.06 in, or a tab in a hidden spot, gives the shop a clean hanging point that will not show on the finished face.
Prep sets adhesion
The coating is only as good as the prep under it. Blasting or a phosphate wash is what makes powder resist chips and corrosion. Bare mild steel with mill scale coats poorly, so name the substrate and its condition.
Texture hides flaws, gloss shows them
A high-gloss finish shows every scratch and fingerprint on the part beneath it; matte, textured, and wrinkle finishes hide surface imperfections and resist fingerprints. Match the finish to how clean the part surface is.
Questions
Frequently asked questions
Most clean conductive metal: mild steel, stainless, and aluminum (5052, 6061, 7075), plus chromoly. The part has to survive the cure bake, roughly 375 to 400 F, so it is not suited to most plastics or low-temp assemblies. Note your substrate when you request a quote. Hot-rolled steel with mill scale coats poorly, so mention it if that is what you have.
Get powder coating quotes
Upload your part and we'll source competitive quotes from qualified manufacturing partners.
STEP · STL · IGES · DWG · DXF · PDF · and more
Uploads are secure & confidential