Connecting rods
Connecting rods - Image 2

Connecting rods

Our connecting rods are manufactured under strict quality control standards, ensuring we deliver the best possible product. Every component, from the smallest to the largest, undergoes rigorous testing before shipment. We supply complete sets including connecting rod journals, large and small bearings.

Strengths:

  • 20CrMo steel grade raw material
  • High resistance and high performance
  • High temperature resistance

Characteristics:

  • Superior strength, durability and dimensional consistency
  • Raw material used 20CrMo
  • High resistance and high performance
  • Hardness between HRC 60-62
  • Carburizing depth of heat treatment 0.8 – 1.2m
  • Surface roughness ≤ 0.2 RA
  • Resistant to high temperatures
  • Strong alloy steel hardened with hardened material
  • Improved for better oil retention
  • Carburized and sharpened trunnions
  • Bearings imported from Taiwan
Category: 

Related products

  • Raw Material
  • Manufacturing
  • Evidence
Raw Material

We utilize the latest and most advanced gas carburizing process for the hardening and heat treatment of our products. Our quality control system and equipment ensure perfect geometric and dimensional accuracy, and our durability is at our core through the use of high-quality alloy steel.

Parameter Details Elpra Chinese Product Advantages of Elpra
BOP
(Parts Purchased)		 Bearing BOP BOP We provide bearings from Taiwan that meet OEM standards.
Raw material Bearing 20CrMo grade steel low quality substandard steel High strength and high performance. Resistant to high temperatures.
Bearing Taiwan Bearing Chinese Bearing Our product offers exceptional mechanical properties such as durability, comfort and long service life for safe driving.
Manufacturing

From the smallest to the most important component, every piece is manufactured under strict quality standards, ensuring we deliver the very best. We make every journey easier by subjecting our products to rigorous checks before shipping.

Parameter Details Elpra Chinese Product Advantages of Elpra
Manufacturing Machining CNC machining center Semi-automated or manual machines By using fully automated CNC machines, we offer min. tolerance level products with negligible rejection in the final stage.
Design center, tool room and R&D facilities Interior design center, tool room and R&D center Not available from regular Chinese factories We have exceptional expertise in developing custom formulations for steel products. For molded products, we have an in-house tool room with integrated mold design and manufacturing facilities, enabling fast turnaround times for our customers.
Molding Automated molding process Manual molding process Automatic molding results in relatively low wear under heavy-duty conditions and at higher friction levels.
Heat treatment Internal heat treatment process Outsourced in most factories Grain alignment to provide better raw material strength and reduce internal stress
Evidence

We rigorously test the products we produce to ensure they exceed the highest quality standards.

  • We rigorously test the products we produce to ensure they exceed the highest quality standards.
  • The tests are carried out at our own facilities and compared to OE benchmarks.
Parameter Details Elpra Chinese Product Advantages of Elpra
Testing standards Arrival of parts Inspection and testing of 100% of the parts received Random / Without evidence Committed to delivering the same product quality/specifications in every batch
In progress The internal installation includes 

  1. Material composition test
  2. Random dimensional verification with a three-axis coordinate measuring machine
  1. Visual tests

2. On-demand testing by external agents
  1. Standard parameters controlled in each process
  2. Three-axis coordinate measuring machine

3. Maintains a tolerance range of 0.002 mm ~ 0.003 mm.
Final inspection Assembly verification with pneumatic gauge, hydraulic/electronic universal testing machines Manual inspection It guarantees safe operation and adequate durability. We have an electronic and hydraulic universal testing machine (UTM) to test the tensile strength and compressive strength of the materials used in manufacturing.

Precision

We ensure high standards of reliability, safety, and lifespan. Our commitment to quality, from research and development through the entire production process to logistics and customer service, has been validated by a quality management audit. The perfection we achieve is the result of the unwavering precision we strive for at every stage of our production.

CONNECTING ROD TEST REPORT
PART 5D9 With Rod Sample Qty 2 Manufacturer Elpra
Item Technical requirement Standard Test method Detection result Conclusion
1 Appearance verification — Visual OK OK
2 Small head thickness ±0.05 Micrometer -0.002 OK
3 Small part roughness 0.4 MAX Roughness instrument 0.24 OK
4 Opening the small hole Ø13±0.25 Air Moment Meter 0.19 OK
5 Roundness of the hole 0.003 Air Moment Meter 0.026 OK
6 Cylindricity of the stump 0.003 Air Moment Meter 0.017 OK
7 Roughness of the larger part 0.2 MAX Roughness instrument 0.14 OK
8 Opening the big hole Ø35±0.04 Air Moment Meter 0.007 OK
9 Macropore cylindricity 0.003 Air Moment Meter 0.018 OK
10 Large head thickness 14±0.05 Air Moment Meter 0.024 OK
11 Distance from the center 3.5±0.05 Vernier Caliper -0.002 OK
12 Carbon Depth 0.8-1.1mm Microscope 0.86 OK
13 Surface hardness 59-63HRC Microhardness tester 59.5 OK
14 Surface hardness 28-43HRC Microhardness tester 34 OK