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CNC Machined Shaft from Steel Bar to Finished Part
Project Case Study

CNC Machined Shaft from Steel Bar to Finished Part

CNC Turning // Heat Treatment // Grinding for Industrial equipment, mobility hardware and power transmission assemblies.

Project Overview

Customer Requirement

A typical OEM project begins with drawing review, material confirmation, process route planning and inspection requirements.

01 // Requirement

Steel bar or alloy steel blank

02 // Requirement

Turned diameters, grooves and threaded features

03 // Requirement

Optional heat treatment and final grinding

04 // Requirement

Dimensional report for critical diameters

Manufacturing Process

From Blank to Finished Component

The exact route depends on drawing, material and quantity, but the steps below show the manufacturing logic buyers can expect.

Step 01

Raw Material Review

Steel bar is checked against the required grade, diameter and certificate before cutting.

Step 02

Saw Cutting Blank

Bar stock is cut to controlled blank length with allowance for facing and machining.

Step 03

CNC Turning

Outer diameters, shoulders, grooves, chamfers and threaded areas are machined according to drawing.

Step 04

Heat Treatment if Required

Induction hardening, quenching and tempering or stress relief can be arranged based on wear or strength requirements.

Step 05

Grinding and Finishing

Critical fit diameters can be ground after heat treatment for stable size and surface finish.

Step 06

Final Inspection and Packing

Diameter, runout, thread, hardness and surface condition are checked before rust protection and export packaging.

Key Manufacturing Challenges

Risk Points to Control

Keeping fit diameters stable after heat treatment
Controlling concentricity and runout
Protecting machined surfaces during packing
Balancing cost between turning tolerance and grinding requirement
Quality Control Points

Inspection Focus

Material certificate review
First article inspection
Diameter and thread checks
Hardness test if heat treated
Final dimensional report
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