7318BEPH/P5DBBVE575 Angular Contact Ball Bearing 90x190x43 40‑Degree P5 Matched DB Set Special Preload VE575

1. Product Overview

7318BEPH/P5DBBVE575 is high‑precision single‑row angular‑contact ball bearing matched set (back‑to‑back DB arrangement). Single bearing dimension: 90 mm bore × 190 mm OD × 43 mm width, 40° large contact angle.
Suffix explanation:
‑ B: 40‑degree contact angle, capable of heavy one‑direction axial load;
‑ EP: Optimized internal geometry for higher load capacity and smoother running;
‑ H: Phenolic resin molded cage;
‑ P5: ISO P5 high‑precision tolerance grade (ABEC‑7);
‑ DB: Two‑piece set, back‑to‑back mounting arrangement, withstand bidirectional axial load & high moment rigidity;
‑ VE575: Factory preset defined special preload value for high‑stiffness spindle‑type applications.

Open‑type design for oil‑air or circulating‑oil lubrication. Manufactured from fully quenched GCr15 bearing steel. The DB back‑to‑back matched pair provides large moment stiffness, good resistance to tilting moment. Factory‑controlled VE575 preload eliminates on‑site preload adjustment work. Widely used for high‑precision machine‑tool spindles, heavy‑duty gearboxes, large printing presses, test‑bench rotary assemblies and high‑rigidity industrial transmission equipment requiring P5 precision and defined preload.

2. Technical Specifications

3. Core Advantages

• 40° large contact angle: Excellent axial‑load carrying capacity, suitable for combined heavy radial plus bidirectional axial‑load operating conditions.
• P5 high‑precision grade: Strict control of dimensional & geometric tolerances, low run‑out, meets machine‑tool spindle‑level rotary accuracy requirements.
• DB back‑to‑back factory‑matched pair: High moment rigidity, strong anti‑tilting‑moment performance, stable under composite offset load.
• VE575 factory preset special preload: Preload value strictly controlled at factory, customers install directly without manual shimming & preload adjustment, reduces on‑site assembly error.
• EP optimized internal geometry: Improved raceway & ball contact pattern, lower contact stress, higher load rating and less heat generation under continuous high‑speed operation.
• Phenolic resin H cage: Good high‑speed stability, low friction, anti‑vibration performance for long‑cycle precision‑equipment operation.
• Open‑type construction, compatible with circulating‑oil, oil‑air lubrication systems for high‑speed precision‑spindle working scenarios.
• Dimensionally interchangeable with international‑standard 7318BEPH/P5DBBVE575 matched sets. Rich custom options: alternative preload classes, P4 precision upgrade, OEM laser marking, neutral export anti‑rust carton.

4. Application Scenarios

7318BEPH/P5DBBVE575 P5‑precision DB back‑to‑back matched angular‑contact ball‑bearing set with VE575 special preload is high‑rigidity precision rotary spare‑part for 90 mm‑shaft high‑end industrial‑equipment:

• Heavy‑duty high‑precision machine‑tool spindle rotary support assemblies
• Large industrial gearbox high‑speed output shaft bearing units
• Large‑format printing press main‑drive rotary positions
• High‑load dynamic test‑bench rotary spindle assemblies
• High‑rigidity automation rotary indexing equipment
• Other precision machinery requiring P5 accuracy, DB back‑to‑back arrangement and factory‑defined VE575 preload

Aftermarket interchangeable 7300‑series P5‑precision factory‑matched DB angular‑contact ball‑bearing set
High‑stiffness low‑run‑out precision bearing solution for machine‑tool spindle manufacturers, heavy‑duty gearbox OEMs and precision‑equipment bulk‑maintenance procurement.

5. Why Choose GQZ Bearing

• 25‑years manufacturing experience of high‑precision matched‑set angular‑contact ball‑bearings including 7318BEPH/P5DBBVE575.
• 7318BEPH/P5DBBVE575 matched‑set is dimension‑for‑dimension interchangeable with international‑standard counterparts, consistent P5‑precision tolerance, DB‑matching accuracy and VE575 pre‑load control standards.
• Complete OEM & ODM custom service covering alternative preload grades, P4‑precision upgrade and special‑processing requirements.
• Strict pre‑shipment QC: GCr15 raw‑material metallurgy & hardness inspection, ball‑sorting, high‑precision raceway super‑finishing, matched‑set pairing‑screening, pre‑load verification test, high‑speed temperature‑rise aging test.
• Professional precision‑spindle‑bearing engineering team provides one‑on‑one radial‑axial combined‑load calculation, shaft‑housing fit‑tolerance guidance and DB‑set installation tips within 24 working hours.
• Large‑scale precision‑production workshop offers competitive factory‑direct bulk‑wholesale price, stable long‑term supply for global machine‑tool, gear‑box and precision‑equipment spare‑part buyers.
• We focus on P5/P4‑precision factory‑matched angular‑contact ball‑bearing sets, controlled‑preload pairing‑technology, ISO‑metric‑precision‑dimension standards, pursuing win‑win long‑term cooperation with high‑end precision‑transmission‑equipment suppliers.

6. Quality Control

• Raw‑material chemical‑composition, internal‑defect and hardness inspection for GCr15 inner‑ring, outer‑ring and steel‑ball blanks
• Precision turning, multiple stress‑relief tempering, ultra‑precision super‑finish grinding for inner‑outer raceway surfaces for P5‑precision requirements
• Steel‑ball high‑temperature quenching, mirror‑polishing and high‑precision auto‑sorting production‑line
• Phenolic‑resin H‑cage molding & finishing, single‑bearing dimensional‑tolerance & run‑out inspection
• Strict pairing‑screening procedure for DB back‑to‑back set; VE575 pre‑load value verification one‑by‑one for every matched‑set
• Targeted performance‑tests: 7318BEPH/P5DBBVE575 matched‑set high‑speed temperature‑rise rotation aging test, moment‑stiffness simulation‑detection, pre‑load stability check
• Full re‑check for dimension‑tolerance, contact‑angle, matching‑mark and pre‑load parameter before anti‑rust‑oil coating and export moisture‑proof‑carton packing.
• Each production batch of 7318BEPH/P5DBBVE575 undergoes spindle‑simulation cyclic‑rotation test to guarantee stable low‑run‑out high‑stiffness rotary‑support performance for 90‑mm‑shaft high‑precision industrial‑transmission‑systems.

7. Get A Quote Now

If you need 7318BEPH/P5DBBVE575 P5‑precision DB back‑to‑back matched angular‑contact ball‑bearing sets for machine‑tool‑spindle manufacturing, heavy‑gear‑box‑assembly and precision‑equipment‑maintenance bulk‑matching, send your purchase‑inquiry directly.
Full professional supporting‑services after inquiry submission:

• Official formal quotation reply within 24 working‑hours
• One‑on‑one radial‑&‑axial‑combined‑load calculation, shaft‑housing‑fit‑tolerance guidance and DB‑matched‑set installation technical‑support from professional‑precision‑bearing‑engineers
• Custom‑bearing‑performance‑upgrade options including P4‑precision‑grade and alternative special‑pre‑load values
• Favorable factory‑direct bulk‑wholesale price for large‑volume 7318BEPH/P5DBBVE575 single‑model‑orders

Please provide purchase‑quantity, working‑conditions (high‑speed / high‑stiffness / lubrication‑mode) and continuous‑operating‑temperature to get detailed official‑quotation‑documents.

8. FAQ