What are the steps in connecting rod manufacturing?

Our 5-step process includes: (1) Design — CAD/CAM modeling and engineering analysis, (2) Forging — high-strength steel die forging, (3) Treatment — heat treatment and surface finishing for durability, (4) Machining — precision CNC operations for exact tolerances, (5) Inspection — 100% quality verification of every connecting rod produced.

How long does connecting rod production take?

Lead time depends on order volume and customization. Standard OEM orders typically require 30–45 days from order confirmation to shipment. Custom ODM projects with prototyping may take 60–90 days for the initial run, with subsequent orders following standard lead times.

What quality inspection methods are used?

Every connecting rod undergoes dimensional inspection — including dimensional measurement, surface roughness analysis, weight balancing, and visual inspection — using calibrated CMM (Coordinate Measuring Machines) and other precision instruments. Material hardness is verified by random batch sampling rather than on every piece, since hardness testing requires destructive cross-section evaluation. Together this ensures ISO 9001 compliance.

Manufacturing Process

How We Forge Precision Connecting Rods

A five-stage production workflow refined over 55+ years of continuous improvement.

Every ROCKET connecting rod passes through a tightly controlled five-step process: CAD engineering, die forging, surface treatment & heat treatment, multi-axis CNC machining, and CMM dimensional inspection. This page walks you through each stage in detail, shares the production metrics that make our output consistent batch after batch, and answers frequently asked technical questions about tolerances, materials, and lead times. Understanding our process helps you specify the right rod for your engine — and know exactly what to expect on delivery day.

Our Process

FROM RAW STEEL TO FINISHED PRODUCT

Design

CAD modeling & engineering

Forging

High-strength steel forging

Treatment

Heat & surface treatment

Machining

Precision CNC operations

Inspection

100% quality verification

Engineering Specifications

ENGINEERING TRANSPARENCY

Every connecting rod we forge is held to exacting metallurgical and dimensional standards — the same benchmarks demanded by leading OEM and high-performance markets.

Material Grades

AISI 8620 / JIS SCM420H (case-hardened alloy steel)

Forging Process

Die forging

Carburizing Case Depth

0.7–1.3 mm

Surface Hardness

HRC 60–64

Big-End Roundness

≤0.003 mm

Surface Finish

Rz ≤ 3.2 µm

Inspection

Dimensional inspection

Weight-matched sets available on request. Specifications reflect our standard production capability and can be tailored to OEM/ODM requirements.

1970

Year Established

NT$80M

Capital

Application Categories

ISO 9001

First in Taiwan

FAQ