Product Details

Outboard Connecting Rod For Model JOHNSON 395861

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Product Description

Technical Specifications

Big-end Width (mm): 20.8

Small-end Width (mm): 20.8

Big-end Bore (mm): 38.1

Small-end Bore (mm): 23.8

Center-to-center (mm): 120.5

Characteristics

+High Strength Material
+Fracturing-Splitting Technique
+Silver Coating for Higher Performance
+Long-lasting Life
+ISO/TS 16949 Quality System
+Famous OEM Factory Product
+Competitive Price

Quality Control

Measurement	Scope Tolerance	Instrument	Capability
Bore Diameter	±0.005mm	Bore Gauge (Sunnen)	0.001mm
Bore to Bore Distance	±0.05mm	Micro-Hite Gauge (TESA)	0.001mm
Rod Thickness	±0.05mm	Micrometer (Mitutoyo)	0.001mm
Hardness	HRC 25~45 HRC 59~63	Hardness Testing Machine (Mitutoyo)	1 HRC
Roundness / Cylindricity	0.003mm	Round Tester (Mitutoyo)	0.01µm
Roughness	Under Ra 0.2µm	Roughness Meter (Mitutoyo)	0.01µm
Parallelism	0.05/100	Indicator (Mitutoyo)	0.01mm
Ring Gauge Correction	±1µm	Universal Length Measuring Instrument (Helios)	0.1µm
Rod Profile	±0.30mm	Video Measuring System (ARCS)	0.5µm

Fracturing-Splitting Technique

Our fracturing-splitting technique have been developed for more than ten years. The irregular cutting surface results in an excellent assembling repeatability. Following Chart shows the reassembling result of our product. Results show that the bore diameter and roundness is almost the same after reassembling.

No.	Bore Diameter (After Honing)	Bore Roundness (After Honing)	Bore Diameter (After Reassembling)	Bore Roundness (After Reassembling)
1	39.023	0.002	39.025	0.002
2	39.023	0.002	39.024	0.002
3	39.025	0.002	39.026	0.002
4	39.023	0.002	39.024	0.002
5	39.025	0.002	39.027	0.003
6	39.022	0.002	39.024	0.002
7	39.022	0.002	39.023	0.002
8	39.021	0.003	39.023	0.003
9	39.024	0.002	39.024	0.003
10	39.023	0.002	39.024	0.003

ISO/TS 16949 Certification

Production

Process Control

We believe that the best products are produced only when the process control system is well established. With more than 20 years experience of manufacturing, Chorng Ko has organized a strict and efficient process management system to ensure every rod is made with excellent quality. Continuous improvement is one of our important principles. We keep modify our processes to achieve higher yielding and higher specification. Needs from customer are our motivation to get better and better.

Main Equipment

+ Computer-aided Shaping Machine(600 Ton)	+ CNC Bore Grinding Machine
+ CNC Lathe	+ Horizontal Bore Honing Machine
+ CNC Machine Center	+ Vertical Bore Honing Machine (Automatic Sizing)
+ Programmable Tempering Oven	+ Automatic Packing Machine
+ Double-disc Vertical Grinding Machine	+ Vacuum Packing Machine
+ Double-disc Horizontal Grinding Machine

Company Information

About Chorng Ko

Chorng Ko IND., founded in 1993, are specialized in research and developing in connecting rod, especially for high quality motocross bike reinforced connecting rod kits. Our company incorporates high precision machinery and inspection equipment from German, Japan, USA as well as domestic. Currently we are ISO9001 and ISO/TS 16949 certified company. Based on the strict and well controlled quality system, every motocross bike connecting rod is guaranteed that the quality is second to none. We supply to customers worldwide with outstanding reputation for high quality, competitive pricing and satisfying customer service.

Chorng Ko works with varies of motorcycle OEM companies including SYM, KYMCO, AEON, PGO, Dinli, etc. Aftermarket parts for scooter, motorcycle, outboard engine, motocross bike, PWC, ATV, are well developed with excellent public praise and outstanding satisfaction in what we do and what we can do. Strong and long-lasting connecting rods with lightweight design are produced for motocross bike application. Our fracturing-splitting technique applied to marine rod is especially famous in this field.

We welcome your phone cell, comments, requests and certainly welcome the opportunity to cooperate the business with your company when it comes to the connecting rods.