Slide Bearing NA48/TM798 517.075 / 517.055 for Marine Turbocharger Engine

The Slide Bearing is designed to support rotating shafts and reduce friction between moving components in marine engines and industrial machinery. It helps maintain smooth operation, minimize wear, and improve the reliability of critical mechanical systems.

Manufactured for accurate fitting and stable performance, the bearing is suitable for replacement and maintenance applications. Please provide the equipment model, bearing dimensions, or part number to confirm compatibility before ordering.

Product Description

HY MARINE NA48/TM798 Slide Bearing (517.075 / 517.055) is a high-load, wear-resistant core sliding component specially engineered for marine main engine and auxiliary engine transmission systems. Adopting high-purity marine-grade copper alloy base material and dual-layer bimetallic composite sintering technology, each slide bearing undergoes precision honing, surface anti-friction coating treatment and high-pressure load fatigue calibration. Designed to adapt to long-duration continuous operation, heavy impact load, frequent speed fluctuation and severe marine humid and salt-corrosion working conditions, this bearing features ultra-low friction coefficient, excellent pressure resistance, superior dimensional stability and outstanding anti-seizure performance. It effectively solves common marine equipment faults including shaft abrasion, bearing burnout, jitter operation, abnormal noise, oil film rupture and shaft locking failure. Serving as a premium OEM replacement part for routine vessel maintenance and engine system overhaul, it ensures stable transmission operation, reduces mechanical loss and cuts down long-term ship downtime and operating costs.

Technical Parameters and Performance Data

Construction and Material Specifications

All data below is obtained from standardized factory testing under simulated marine high-load, continuous operation and variable impact load working conditions.

Machining Accuracy and Fitting Tolerance

NA48/TM798 517.075 / 517.055 marine slide bearings adopt 5-axis CNC ultra-precision machining and micro-hole finishing technology. The inner diameter roundness, surface flatness, assembly clearance and contact surface uniformity strictly comply with original OEM factory standards. High-precision dimensional control realizes zero-clearance optimal matching with matching shafts and housing bores. It maintains stable low-friction sliding operation under long-term continuous heavy-load and variable-speed working conditions, effectively reducing transmission friction loss, avoiding dry friction and oil film failure, and eliminating common problems such as shaft vibration, abnormal operating noise and premature wear during long-voyage marine operation. It guarantees continuous, stable and efficient transmission performance for marine main engines and auxiliary power systems.

Quality Assurance and Compliance

Pre-Delivery Performance Testing

Every batch of NA48/TM798 slide bearings completes full-range pre-delivery inspections, including base material composition analysis, high-pressure load endurance test, full-size dimensional inspection, surface roughness test, salt spray corrosion resistance test and long-cycle continuous friction fatigue simulation test that simulates real ship working conditions. Complete official factory test reports, dimensional inspection datasheets and performance test records are provided with each order. Ship repair teams can conduct direct installation and commissioning without secondary performance testing, effectively saving inspection labor costs and shortening equipment overhaul and maintenance cycles.

Classification Society Certification

All NA48/TM798 marine slide bearings are equipped with valid CCS Type Approval Certificate, fully complying with international marine industry technical specifications and global ship inspection standards. Both in-stock standard products and customized bearings adopt unified marine-grade quality control standards, fully meeting international vessel inspection and port clearance requirements.

Use Cases for Commercial Marine Operations

The NA48/TM798 517.075 / 517.055 slide bearing is specially tailored for supporting marine main engine and auxiliary engine transmission systems, perfectly matching mainstream marine engine models. It is widely applied in container ships, oil tankers, bulk carriers, harbor tugboats, offshore platform supply vessels and engineering ships. Suitable for new ship construction OEM supporting assembly and old ship mechanical system overhaul, routine maintenance and replacement. It effectively eliminates mechanical failures caused by bearing aging, friction wear and corrosion damage, reduces vessel standby downtime, and ensures stable and efficient operation of ship power transmission systems.

Applicable Engine Models

FAQ

1. What material is the NA48/TM798 slide bearing adopted?
Our NA48/TM798 517.075 / 517.055 marine slide bearing adopts high-purity marine-grade bimetallic copper alloy composite material. After precision honing, anti-friction coating and anti-corrosion passivation treatment, the product features ultra-low friction, high pressure resistance and excellent wear resistance, perfectly adapting to heavy-load, continuous operation and salt spray corrosion marine working conditions.

2. Is this slide bearing fully compatible with original equipment?
Yes. This slide bearing is a standard OEM precision replacement part developed for NA48/TM798 marine supporting systems. All inner diameter size, assembly tolerance, surface flatness and structural parameters are completely consistent with original factory specifications, with high installation compatibility and universality.

3. Does the bearing have official marine certification?
All our NA48/TM798 marine slide bearings are equipped with valid CCS Type Approval Certificate, complying with international marine industry standards and ship inspection specifications. The products can smoothly pass vessel annual inspection, port inspection and ship class audit without any compliance risks.

4. What is the delivery time for standard and customized bearings?
Standard in-stock NA48/TM798 slide bearings can be shipped within 7–10 working days after payment confirmation. For non-standard modified or custom-processed bearings, the production cycle is 7–15 working days, with stable quality and guaranteed delivery schedule.

5. Can you provide official test reports for each order?
Yes. Every batch of NA48/TM798 slide bearings is delivered with complete factory test documents, including raw material inspection reports, full-size dimensional inspection records, load resistance, friction wear and corrosion resistance test data. Customers can install and commission directly without secondary performance testing to save maintenance time and cost.

6. What is the service life and failure rate of this marine slide bearing?
Under standard marine continuous heavy-load working conditions, the bearing’s continuous stable service life reaches 12,000+ hours. The batch qualification rate is up to 99.8%, and the field operation failure rate is controlled below 0.2%. It effectively avoids common faults such as shaft wear, bearing burnout, mechanical jitter and abnormal noise, greatly reducing long-term equipment maintenance costs and ship downtime loss.