The Bogie leaf spring is suitable for special and heavy weight semi-trailer , it install with BPW ,FUWA,HJ, L1 Axle.
The Capacity: 24,000 to 32,000 kg . The item total has 17 pcs,the raw material size is 120*14 for frist and second pcs, the third and the fourth is 120*20, others are 120*18. Raw material kind is SUP9.The free arch is 110±3mm,the Development length is 1850, the centre hole is 20.5.

Multi-leaf springs are made as follows:

1.Shearing of flat bar
2.Center hole punching / Drilling
3.End Heating process
(1).Eye Forming / Wrapper Forming forming (hot & cold process)
(2).Diamond cutting / end trimming / width cutting / end tapering
(3).End punching / end grooving / end bending / end forging / eye grinding
(4).Center hole punching / Drilling / nibbing
4.Heat Treatment
(1).Heating
(2).Camber forming
(3).Quenching
(4).Tempering
5.Surface preparation
(1).Shot peening / stress peening
(2).Painting
6.Eye bush preparation process
(1).Eye reaming / eye boring
(2).Bush insertion
(3).Bush reaming
7.Assemble
(1).Presetting & load testing
(2).Paint touch-up
(3).Marking & packing

The Bogie leaf spring is suitable for special and heavy weight semi-trailer , it install with BPW ,FUWA,HJ, L1 Axle.

The Capacity: 24,000 to 32,000 kg . The item total has 17 pcs,the raw material size is 120*14 for frist and second pcs, the third and the fourth is 120*20, others are 120*18. Raw material kind is SUP9.The free arch is 110±3mm,the Development length is 1850, the centre hole is 20.5.