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High precision CNC machining and welding tube for engine

High precision CNC machining and welding tube for engine


The material is steel and the process is pipe cutting, CNC machining, welding, and deburring.the OD is 16.8mm and the ID is 8.1mm.the key point of the welded pipe is that there are 2 internal grooves with the diameter of 12.125 mm and 1 groove with 16 mm.the minimum fillet radius is R0.13 to R0.5.and we break all sharp edges 0.1 to 0.5.

We engineering team spend 3 weeks in R&D,we have many similar products and the regular quantity is 1000 per month.



Nanjing Precision Engineering Co., ltd

Product’s Parameters


2.process:Pipe cutting+ CNC machining+ welding+deburrs

3.Service available

OEM and ODM service,the client has provided the real original samples with us, we have measured and designed STEP, CAD, and PDF drawings for client freely.


5.Tolerance:ISO2768-M/F with dimensions’ inspection report.

6.Dimensions:OD:16.8mm,ID:8.1mm,length: 38mm

7.traceability:Material heat no, production batch, delivery batch

8.certification:ISO9001,SGS, Rohs

9.Net Weight:0.07kgs


inner: bubble poly bag; outer: carton box or poly wooden case/pallet, final: with # straps


Nanjing Precision Engineering Co., ltd

Production time for 2000pcs

7-10  days

Payment Method

T/T bank, LC, Western Union Pay, PayPal, Cash...

Trade Incoterm



Small batch: express such as FedEx/ DHL/ UPS/ TNT/ EMS......
Bulk batch: by air& by sea in LCL and FCL

Logistics Service

Booking, Pick-up Arrangement, H.S CODE select, ETD and ETA notification......

Shipping Docs

Bill of lading, Packing List, Invoice, Co, Coo, Form A/E/F, Non-wood packing declaration......

After -sale service

Technology support, Inspection support, assembly support, custom clearance support......

Complaints and Claims

The complaints and the claims will be answered within 2 hours definitely

Intellectual Property Protection

Respect NDA Agreement Seriously


100% refund or replacement for nok pcs


You are always welcome to contact NJPE, we will reply to you within 8 hours absolutely after the receipt of your questions or enquiries.

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I am Cindy Fan,you please kindly send your inquriy to ,I will send you quotation with 2 hours, or contact me at Skype Cindy-fan, Wechat 86-13813884518, and Whatsapp 86-13813884518,thank you!