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Products
We supply full-category shock absorber components, including pistons, stampings, rubber seals, piston rods, springs, and self-developed banding/grooving machines.
Deep Drawn Bowl Housing
Deep Drawn Bowl Housing by XIAYI breathes: three relief slots drain wading water and vent pressure so the buffer rubber never bulges or rots. Your supplier adds a roll-formed internal thread and spherical anti-rotation cap — sealed where it matters, open where it must be.
The Deep Drawn Bowl Housing kit — an internally threaded cylinder plus arc sealing cap — solves the problem sealed housings ignore: trapped water and pressure. Three distributed relief slots drain ponding and vent compressed air, an internal roll-formed thread locks the cap, and three square bite grooves stop rotation. Deep-drawn in one piece, threaded without splicing.
Four Structural Highlights
| Feature | What It Prevents |
|---|---|
| Distributed pressure-relief long slots on the cylinder wall | Water trapped after wading, buffer rubber bulging from internal pressure — plus convective cooling that slows rubber aging |
| Precision roll-formed internal thread on the inner wall | Loose parts and axial play — smooth tooth roots resist slipping after long-term tightening |
| Spherical arc cap with three square bite grooves | Axial impact concentration (spread across the flange face) and rotational sliding (circumferential interlock) |
| Synchronously stamped datum central holes | Eccentric piston rod friction and local high-pressure oil seal leakage |
7-Station Line, Exclusive Controls
| Process Step | Exclusive Standard |
|---|---|
| Coil pre-treatment | Separate ST12/ST14 bins, full spectrum per coil, leveling flatness ≤ 0.008 mm, tensile sampled every 90 min |
| 7-station progressive deep drawing | Cylinder, relief slots, thread blanks, spherical cap & grooves formed synchronously; thread roots thickened |
| Stress-relief aging | 3.5 h sealed heating at 115 ℃; concentricity & flatness re-tested after cooling |
| Inner & outer air deburring | Flash removed between thread teeth and slot edges; endoscope inspection of full inner wall |
| Tiered zinc passivation | 13 μm coastal grade / 9 μm urban grade, laser thickness monitoring, re-plating enforced |
| 24 h six-channel 3D inspection | Thread integrity, slot dimension, groove symmetry & coating scanned; samples retained per machine |
Durability Record
- ST14 elongation ≥ 31%: no micro-cracks at thread roots, relief slots or cap grooves after forming; ST12 ≥ 26% for urban duty
- Million-cycle lateral vibration: slots intact, threads unworn, cap arc surfaces uncollapsed
- Matched hole concentricity drift ≤ 0.02 mm; 1000 hot-cold cycles (−42 ℃ to +112 ℃) with no springback
- 9 μm coating passes 400 h salt spray; 13 μm passes 500 h without pitting — 3M tape adhesion verified
- Weld-free structure: comprehensive failure rate of deformation, leakage and loose brackets down 72%
FAQ
Q: Our sealed housings bulge the buffer rubber. Why does the slotted design help?
A: Fully sealed cavities trap water and build air pressure on temperature swings — the rubber bulges or debonds. The three relief slots drain ponding and vent pressure while still blocking silt, and the airflow cools the rubber in operation.
Q: Are roll-formed internal threads strong enough for repeated service?
A: The thread is formed without splicing, with thickened roots and no stress notches — vibration bench tests show no wear or slipping after a million cycles of lateral load.
Need a housing that survives wading routes? Request the slotted bowl housing sample
Ningbo XiaYi Electromechanical Tech Co., Ltd. deep-draws internally threaded bowl housings with pressure-relief slots. Send your thread spec and cavity depth for a proposal.
About XIAYI drainage engineering: the slot geometry came from wading-route field failures — water in sealed cavities destroys rubber faster than any road impact, so the housing was redesigned to breathe without leaking.
Send Inquiry
Contact Info
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Address
No.209 Lane 520 Tongning Rd,Qianjiang Street,Jiangbei District, Ningbo City, Zhejiang Province, China
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Get a Tailored Quote for Your Shock Absorber Parts
Why Global Buyers Choose Ningbo Xiayi:
✓ IATF 16949 Certified — Defect rate strictly controlled below 0.1%.
✓ Full-Category Supply — Pistons, rods, springs, stampings & rubber parts.
✓ R&D Support — Custom powder metallurgy formulas & 7-10 day rapid prototyping.
✓ Proven Capacity — 50 million core pistons produced annually for global OEMs.
Ready to start? Complete the form below and our engineering team will respond within 24 hours with a custom recommendation.
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