custom high quality stainless steel parabolic trailer leaf spring

1.More than 10 years experience in semi trailer production.

2.Reliable quality.

3.Perfect pre-sale and after - sale service.

4.Accept customized products.

Single piece leaf spring hardness need to be HB378-445 after heat treatment;

Overheating, overburning, cracking, folding, bruising and other defects are not allowed on surface;
Each sinlgle leaf spring need to do stress shot peening treatmnet;
After the spring assembling, the center bolt must be punched and riveted;
Bolt mechanical performance level: 8.8-GB3098.1-2000;
The surface defects of bolts shall be implemented according to GB5779.1-2000;
Tolerance of bolts is according to GB3103.1-1982 Grade B product ;
The spring assembly is painted with black paint or as requested, according to QC / T484-TQ9;
Other technical requirements shall be implemented according to GB / 19844-2005.

trailer leaf spring
we can supply variuos range of multi-leaf spring, parabolic leaf spring and Z-type leaf spring with high quality &best price .
used in heavy duty trailers and trucks
international standard specification
strict quality control system

Thickness : From 6 mm to 50 mm
Width: From 45mm to 152mm
Color: shinning black,dark black,grey,blue follow your requirement
Materials: SUP7, SUP9, SUP9A, SUP10, SUP11, SUP11A, 60Si2Mn, 55CrMnA and 50CrVA are available
Certificate: TS16949;ISO9001; GB/T 19001-2008
Lead time: within 30-45days after receiving orders

R&D CAPABILITIES
* Experienced R & D engineers
* Ability to do OEM customized designs
* Patents and copyrights on original inventions
* Comprehensive design capabilities covering mechanics, electricity, and industrial outlook
* Experienced in world popular CAD software Trial-production Workshop for Producing
* Prototype Sample, Tooling and Fixtures
* Patents and copyrights on original inventions
MANUFACTURING CAPABILITIES
* Continuous improvement on lean production management
* Automatic assembly lines specially in jacks etc towing accessories' assembly
* 5S site management standard
* Comprehensive automatic equipment covering machining, welding, powder coating, plastic injection and assembly.
QUALITY CONTROL
* Using IS09001 standards,SAE tests are conducted in-house and by third-party labs in the USA.
* US$2,000,000 Product Liability Insurance Certificates for Quality, Safety and Environment