Precision Machine Shop in Walhalla, SC
Delivering reliable machining, fabrication, waterjet and plasma cutting, and engineering support with fast turnaround and consistent quality.
Precision • Innovation • Reliability
About Keystone Industries
Keystone Industries is a full service machine shop specializing in precision machining, CNC milling, fabrication, CNC cutting, and industrial repair work. Our team combines engineering expertise with practical shop experience, allowing us to support projects from concept and prototyping through production and final assembly.
We operate a blended environment with manual mills and lathes, a CNC vertical machining center, a dual-head CNC waterjet, a CNC plasma table, and a full fabrication and welding department. This gives us the flexibility to produce one off parts, reverse engineer components, support fast turnaround repairs, and handle complete fabrication projects.
Keystone Industries serves manufacturers, industrial facilities, equipment builders, and OEMs who rely on accurate machining, dependable turnaround, and a team committed to quality.
- Manual Machining & Turning
- Waterjet & CNC Plasma Cutting
- Custom Fabrication & Welding
- Industrial Equipment Repair
- Engineer-Led Design & Support
- CNC Milling
- Trusted Industry Partnerships
- Prototype & Short-Run Production
Capabilities Preview
Our Core Services
01
Manual Machining & Fabrication
02
CNC Machining
3-axis CNC milling on a Chevalier 2443 VMC with Fanuc control, holding tolerances to ±0.001″. Drilling, tapping and boring for prototype and production parts.
03
3D Design & Engineering
Expert SolidWorks modeling and drafting to bring designs from concept to production.
04
Waterjet & Plasma Cutting
CNC waterjet and plasma cutting for a wide range of materials and thicknesses. Our dual-head waterjet cuts two identical parts at once. From intricate profiles to heavy-duty metal cutting, we deliver accurate, cost-effective solutions for custom parts and production runs.
05
Laser Services
Precision laser cleaning, surface preparation, and marking/etching for metals, plastics, and specialized materials. Ideal for restoration, customization, and industrial applications.
06
Welding & Fabrication
MIG and TIG welding with in-house weldment fabrication, from tube and flange joints to structural frames and mixer weldments. Welding sits alongside the machining, so parts stay in one shop from raw stock to finished assembly.
Trusted Solutions
Why Choose Us
At Keystone Industries, LLC, design, machining, cutting and welding happen in the same building, so a part does not change hands between shops to get finished. Here is what that means for your job:
Engineering and Shop Experience
Our team designs in SolidWorks and runs the machines. Drawings that make sense on the floor, and parts that come out the way they were drawn.
Machining, Cutting, and Welding
Manual and CNC machining, dual-head waterjet, CNC plasma, and MIG and TIG welding under one roof. Parts go from raw stock to finished assembly in one shop.
Help With Replacement Parts
No print, no problem. Bring us the worn part and we will measure it, model it, and make a new one, including components that are no longer sold.
Prototypes Through Production
One-off prototypes, short runs, and repeat production orders, with the same setup and inspection process whether you need one part or a hundred.
Our Brands
Divisions & Product Lines
Agitation Resources
Agitation Resources is the mixer and agitator division of Keystone Industries, LLC. Top-entry, side-entry, portable and static in-line mixers, impellers and lifting stands, engineered and built in upstate South Carolina.
Keystone Lighting Systems
Keystone Lighting Systems is our custom aluminum site-lighting pole line, fabricated in house for commercial and multi-site programs.
Frequently Asked Questions
Your Questions Answered
We work on custom machining, precision fabrication, prototyping, and small-to-medium production runs across multiple industries.
Yes, our team provides 3D modeling, SolidWorks drafting, and engineering support to bring your concepts to life.
We work with metals, plastics, titanium, and specialty materials to meet your exact requirements.
Absolutely. Use our contact form to share your project details, and we’ll respond quickly with a quote.
READY TO GET STARTED?
Request Your Quote Today
At Keystone Industries, LLC, we’re ready to provide precision machining and fabrication services backed by engineering expertise. Whether you need a prototype or full-scale production run, our team delivers accuracy, reliability, and fast turnaround.