VLI200744N Rolling Bearing Ball Bearing Machine Parts Roller Bearings

• Customization: Available
• Standard or Nonstandard: Standard
• Feature: High Speed, Vacuum, Antimagnetic, Cold-Resistant, Corrosion-Resistant, Heat-Resistant
• Model NO.: VLI200744N
• Sealing Gland: Sealed On Both Sides
• Rolling-Element Number: Single-Row
• Roller Type: Deep Groove Raceway
• Material: Bearing Steel
• Type: Internal Gear
• Craft: Grinding
• Precision: P5/P4/P2
• Heat Treatment: Surface Hardening
• Isolation Block: Plastic
• Delivery Period: 40 Days
• Weight: 51.5kg
• Transport Package: International Shipping Standards
• Specification: 648*848*56
• Trademark: LYDZC
• Origin: Luoyang

Product Description

VLI200744N  Product structure 
 

Designation				Dimensions				Mounting Hole Size						Gear Data				Coa(kN)	kg
				da	D	d	H	D1	D2	n1	n2	φ1	φ2	m	z	do	x
LYDZ200744N ZT-I	VLI200744N ZT			648	848		56	820	705	12	20	φ18	M12	6	110	660	0	530	54
LYDZ200744N -I	VLI200744N			648	848		56	820	705	12	20	18	M12	6	110	660	0	530	51.5

 
Product detail presentation
Detailed product parameters

This is a high-performance bearing that combines rotational support and transmission functions, widely used in engineering machinery, slewing platforms, wind power generation, medical equipment, and other fields. Below is a systematic analysis of its key characteristics:

 

 

Core Structural Design
Four-point contact ball arrangement: Utilizes two rows of steel balls arranged in a "V-shaped" four-point contact configuration, optimizing combined load capacity for axial, radial, and overturning moments. Unlike single-row designs, the double-row structure increases dynamic load capacity by 30%-50%.
Integrated internal gear transmission: The bearing outer ring is machined with involute gears (common module 4-12, accuracy grade ISO 6-8), enabling direct meshing with the drive pinion. This eliminates the need for additional transmission components and reduces system inertia.

 

                                                                                                                                                      

Mechanical Performance Advantages
Statically indeterminate load distribution: The four-point contact ensures that each steel ball forms two contact ellipses under load in any direction, theoretically reducing contact stress by 15%-20% and significantly extending fatigue life (L10 life can exceed 50,000 hours).
Stiffness matrix optimization: By adjusting preload (typically applying an axial preload of 0.05C-0.1C, where C is the rated dynamic load), system stiffness can be increased by 2-3 times, making it suitable for high-precision positioning applications (e.g., CNC rotary tables with repeat positioning accuracy of ±2").

                                                                                                                                                                                                 

LYDZC Bearing
LYDZC was founded in 2012 which insists on product quality as the principle and implements the strategy of success through quality in the process of production. We focus on manufacturing high-precision bearings.


Advanced quality idea
Taking the science and technology as our guide
Creating international well-known brand as our goal
We always provide the finest products,leading technology and excellent service to all of our customers at home and abroad to create a vast world through innovation and development.
We take the world's top bearing brands as the example.
We try to keep our products perfect when we produce every single one.


Strict production process
Drawings    
According to the customers specific requirements, the field where the bearing is used and working conditions. We optimize the design of products in order that the customers could economize and get their desired pruducts



We choose steel ball ,cage ,dust cover , sealing ring , grease  ,and other parts in line with international standards to ensure our product quality
Cleaning ,  locating cleaning
drying ,  oiling , greasing  packaging  storage  and delivery
Every process is perfect and any defective product is combed out