Machining Services

We here at SMS consider ourselves as a “Job Shop”, where no job is to large or to small. We can make new, modify a part for you or repair, whatever it takes. Our goal is to get you back up and running. 


  • Lathe – up to 64″ Diameter, 10′ long, 12″ spindle bore
  • Mills – both Horizontal and Vertical
  • Key Setter
  • Grinders
  • Vertical Tilt Head Saw – up to 16″ Capacity


  • Turning
  • Threading
  • Boring
  • Knurling
  • Reaming
  • Keyways
  • Broaching
  • Tapping


Our staff will aide you in:

  • Design / Reverse Engineering or create as built
  • 3D Modeling

We will work with you to come up with the best and most economical way to get the job done with a new or modified design

  • Fusion 360
  • Model CAD
  • Good Old Napkin and Pencil (old school)

Mechanical Repairs

With SMS’s experienced staff, we can offer mechanical repairs, overhauls, and rebuilds of:

  • Gearboxes
  • Pumps
  • Industrial Machinery and Equipment
  • Plus many more


Seguin Machining & Supply can handle your Bolt Hardware needs as well. We will be more than happy to supply you with one, a hundred, or anything in between; whatever your needs may be.

What we do not have, we can order and, in most cases, will have product by the next day.

SMS has an extensive inventory to fill your fastener needs. We stock Nuts, Bolts, and Washers in standard, coarse or fine. In Grades 5 and 8. We also inventory metric in Grades 8.8 and Grade10.9, in coarse and fine. Our inventory consists of Plated, Stainless Steel and a few Brass as well.

SMS carries Hex Cap Bolts, Socket Head Cap Screws, Socket Set Cap Screws, Flat Head Cap Screws, Carriage Bolts, Plow Bolts, and Threaded Rod, in 3’ and 10’ lengths. We inventory machine screws, machine tapping screws, Lag Screws, and Button Head Cap Screws. We inventory Hex Nuts, Nylon Lock Nuts, Grade C Lock Nuts, Jam Nuts, and Castle/Slotted Nuts just to name a few. We stock Flat Washers in SAE and USS, Lock Washers (Internal and External Lock Washers), and Fender Washers.

Fabrication and Welding

Seguin Machining and Supply provides all types of Fabrication and Welding Services. This includes new fabrication, welding repairs and modifications. We have a portable welding machine for off-site welding as well.

Welding Types:

  • Stick
  • Mig
  • Tig
  • Gas
  • Hard Surfacing


  • Carbon Steel
  • Stainless Steel
  • Aluminum
  • Cast Steel
  • Cast Aluminum

Field Services

Seguin Machining and Supply offers Off-Site Welding Services. From new to repairs, SMS will come to you for any welding needs, whether you are Agricultural, Commercial, Industrial, or Residential. With our Service Team, we can handle various installations.

Industrial Outsourcing

Over the past years, SMS has developed working relationships with other shops to provide additional requirement needs for your turnkey project(s).

  • CNC
  • Laser Cutting
  • Waterjet Cutting
  • CNC Plasma Cutting
  • Sheet Metal-Gauge Material through Fractional Material
  • Grinding
  • Heat Treating
  • Heavy Fabrication
  • Power Coat / Paint / Anodize / Galvanize
  • Hard Surface Chrome
  • Fiberglass Repair
  • Rolling
  • Load Testing
  • Xray