KOMATSU S6D125 crankshaft(6151-31-1110) is made from high-quality raw materials 40Cr. Compared to cast iron crankshafts, they offer 27.9% higher tensile strength and 78.6% higher yield strength. The unique induction hardening process creates a 3-5 mm hardened layer (HRC 52-58), which improves wear resistance by 15% compared to nitrided cast iron. Our crankshafts have earned the trust of distributors worldwide.

Product Specifications

ENGINE NO	S6D125	Gross weight(kg)	116
OEM/PART NO	6151-31-1110	Length(mm)	1104
Crankshaft Material	Forged steel 40Cr	Main journal(mm)	110
Engine type	diesel engine	Crankpin journal(mm)	80
Application	KOMATSU PC3008	Stroke(mm)	150
Anti-rusty Coating	Yes	Hardness(HRC)	HRC52-58

Product Advantages

(1)Material Advantage: Forged Steel--40Cr
Data Comparison:Forged Steel vs. Cast Iron

Index	Our Forged Steel Crankshaft	Market Cast Iron Crankshaft	Customer Value
Tensile Strength	≥1000MPa	≤785MPa	Suitable for high-load conditions
Wear Life	3-5 years (heavy load)	1-2 years	Reduces maintenance costs
Low-Temp Toughness	AKV≥25J (-40℃)	AKV≤12J	Adapts to extreme climates (Russia, etc.)

(2)Medium Frequency Quenching (Heat Treatment)

KOMATSU S6D125 crankshaft is treated with medium-frequency quenching and tempering, leaving quenching marks on the surface.The quenching layer depth is 3–5 mm, with a hardness of HRC52–58.

(3)Full-Process Quality Inspection
In the production process, there are more than 30 inspection procedures, including magnetic particle inspection, ultrasonic inspection, hardness inspection and dynamic balance inspection.

S6D125 crankshaft ISO certification

Factory Strength

1. Professional manufacturer: With 18 years of experience in producing forged steel crankshafts, our products are popular in Southeast Asia, the Middle East, and other regions.

2. High quality and reasonable prices: We have a professional team with technical knowledge and management experience. The company is equipped with advanced production facilities. With a sound management system and high-quality products, we can maintain competitive and reasonable prices.

3.Our factory is equipped with advanced CNC equipment for the production of forged steel crankshafts to ensure the machining accuracy of KOMATSU S6D125 crankshaft (shaft neck roundness ≤ 0.01 mm).

Production Application

Compatible models for KOMATSU S6D125 crankshaft：

Excavator：PC300,PC400,PC240-8

Wheel loader：WA470-3/WA470-6

Bulldozer：D65EX/D85E-15

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Product packaging

For KOMATSU S6D125 crankshaft, we offer our customers a choice of different types of packaging boxes: plywood and raw wood.

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FAQ (Answering Common Questions)

Q: What kind of materials can you produce castings?

A: Our products are forged steel crankshafts, using high quality raw materials 40Cr and 42CrMoA.

Q: What is the delivery time for your products?

A: Generally speaking, 30 days delivery.

Q: What is the quality of your products?

A: We have the whole process of quality inspection, key indicators can provide third-party test reports.

Q: What index data can your company provide?

A: The whole process of quality control and the technical data such as hardened layer depth, dynamic balance, etc.

Q: What production equipment does your company have?

A: We have high-quality CNC lathes, mill-turn centers and other advanced equipment to ensure processing accuracy.

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