Custom Manufacturing of Hardened Steel Pins for the Construction Industry

We custom manufactured hardened steel pins specifically designed for heavy construction equipment application. Each of the products was made using hot rolled 4140 heat-treated steel within the tightest tolerances of +0″/-.0014.”

Our team used a detailed five-step process where we used our state-of-the-art equipment, which includes a KASTO saw, a HEY centering machine, a Mazak CNC lathe and mill, and a Cincinnati twin grip centerless grinder.

To guarantee that we manufacture high-quality products, we followed an extensive testing and inspection process that included the use of a micrometer, hardness tester, profilometer, calipers, and gage pins.

Project Highlights

Product Name:

Custom Manufactured Hardened Steel Pins

Product Description:

A custom manufactured steel pin used within the heavy construction equipment industry



Delivery Location:




Estimated Part Weight:


Standards Met:

Customer-Supplied Print, 2D CAD Drawing

Capabilities Applied/Processes:

  • Saw Cutting: Saw to 37.047" Long ±.030"
  • Turning-CNC: Turn and Chamfer
  • Mill CNC: Drill & Chamfer 2 Cross Holes
  • Heat Treatment: 55-60 RC Surface and .130-.210 Effective Case Depth
  • Grinding: Grind Diameter

Equipment Used:

  • KASTO Saw
  • HEY Centering Machine
  • Mazak CNC Lathe
  • Mazak CNC Mill
  • Cincinnati Twin Grip Centerless Grinder

Overall Part Dimensions:

  • O.D.: Ø3.9349"
  • Length 37.047"

Tightest Tolerances:


Material Used:

Hot Rolled 4140 Heat Treated Steel

Max Material Finish:

1.6-6.3 Rmax - metric

In-Process Testing/Inspection Performed:

  • Micrometer
  • Calipers
  • Gage Pins
  • Hardness Tester
  • Profilometer