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Views: 0 Author: Site Editor Publish Time: 06-26-2026 Origin: Site
In any heavy-duty truck, the drive shaft transmits engine torque to the rear axle across a long span. The center support bearing — OEM number HB88512 — holds the two-piece propeller shaft in alignment, absorbs vibration, and prevents harmful whip and noise. When this single component wears, drivers feel it as humming, shudder, or a clunk on acceleration, and fleets face costly downtime. Choosing a correctly specified, durable center support bearing is therefore critical to driveline reliability.
The HB88512 center support bearing is an integrated assembly of three functional parts working together:
• Inner ball bearing: a sealed, high-load radial ball bearing that carries the rotating propeller shaft and allows it to spin freely at high RPM with minimal friction.
• Vulcanized rubber insulator: an EPDM/NR rubber ring chemically bonded (vulcanized) to the metal, isolating driveline vibration from the chassis and damping noise. This rubber-to-metal bond is where most aftermarket parts fail prematurely — Huami uses controlled vulcanization for consistent adhesion.
• Steel mounting bracket: a stamped, e-coated or zinc-plated bracket that bolts to the cross-member, engineered for fatigue strength and corrosion resistance under road salt and moisture.
Key specifications and cross-reference:
Item | Specification |
OEM / Ref. No. | HB88512 (cross-reference available on request) |
Bearing type | Sealed high-load radial ball bearing |
Rubber compound | EPDM / NR, vulcanized rubber-to-metal bonded |
Bracket finish | Zinc-plated / e-coating, anti-corrosion |
Operating temp. | -40 °C to +120 °C |
Application | Heavy-duty & commercial trucks, two-piece propeller shaft |
Certification | IATF 16949, ISO 9001, ISO 14001, ISO 45001 |
MOQ / Lead time | Low MOQ, fast lead time, factory-direct |
Performance advantages:
• Superior vibration and noise damping (NVH) thanks to optimized rubber durometer and bond strength.
• High dynamic load capacity for fully loaded, long-haul operation.
• Long fatigue life — the bracket and rubber are validated against thermal and mechanical cycling.
• Sealed bearing resists water, dust and contamination, extending maintenance intervals.
Q: What does the HB88512 center support bearing do?
A: It supports the middle of a two-piece truck drive shaft, keeps it aligned, and damps vibration and noise transmitted to the chassis during rotation.
Q: What are the symptoms of a failing center support bearing?
A: Common signs are a humming or growling noise that rises with speed, vibration through the floor, and a clunk when starting to move or shifting gear. These usually indicate worn rubber or a seized bearing.
Q: Is HB88512 a direct OEM replacement?
A: Yes. It is manufactured to OEM-level dimensions and fit. We provide a full cross-reference list so you can confirm compatibility with your shaft and chassis before ordering.
Q: Why does the rubber matter so much?
A: The vulcanized rubber isolates driveline vibration from the cabin. Poor rubber-to-metal bonding cracks early, causing noise and misalignment. Our controlled vulcanization ensures consistent, durable adhesion.
Q: How long does a center support bearing last?
A: Service life depends on load, road conditions and maintenance, but a quality unit typically lasts well beyond 150,000 km. Sealed bearings and corrosion-resistant brackets extend that further.
Q: Can you supply for both OEM and aftermarket?
A: Yes. We supply OEM programs with full traceability and IATF 16949 quality control, as well as aftermarket and fleet orders in bulk.
Q: What is your minimum order quantity?
A: We offer a low MOQ suitable for trial orders and flexible volumes for distributors and fleets. Contact us for current terms.
Q: Do you support OEM branding and custom packaging?
A: Yes. We offer custom packaging, private labelling and bespoke specifications for qualified OEM and distributor partners.
Hebei Huami New Material Technology Co., Ltd. is a Beijing Stock Exchange-listed manufacturer of rubber damping and sealing components for commercial vehicles, certified to IATF 16949, ISO 9001 and AEO. Whether you are an OEM, distributor or fleet buyer in Europe or North America, we can match your HB88512 requirement with verified cross-reference, competitive factory-direct pricing and reliable export logistics.
Contact us now for a free sample, full cross-reference list and a tailored quotation — let our engineers help you secure a dependable, long-life center support bearing supply.
