CHG enjoys a very good reputation among our cooperators and customers all over the world.
Position :
Home > News > Company news

Advantages of Modified Double-row Tapered Roller Bearing M268749DW/M268710

Aug 26, 2019
Advantages of Modified Double-row Tapered Roller Bearing M268749DW/M268710
I. Working condition description
1. Maximum speed: 1 rpm (max)
2. Maximum radial load: 7000 KN (max)
3. Lubrication mode: grease lubrication
4. Bearing clearance C2 (small clearance): Because of the heavy load, the speed is low. The radial clearance of C2 group was 0.11-0.21 mm.

II. Variation of Bearing Type
The original design of M268749D/M278710 is double row tapered roller bearing (415.925*590.55*209.55); the modified rear bearing model: NNU415, HG19/415, and the installation dimensions of the bearing before and after the modification are all (_415.925*590.55*224.55).
Advantages of bearing modification:
1. Changing the installation method: the inner diameter of double row tapered roller bearings and the roll neck are fitted through the clearance to carry out sliding propulsion installation; the center line of the two bearings should be the same, so that the bearing box can not be installed on the roll neck (see figure 1); the outer components of double row cylindrical roller bearings and the box body are loaded into the roll simultaneously, which is easy to install and reduces the loading. Roll time, improve labor efficiency (see figure 2).

2. Explanation of improving plate shape by changing grinding support datum face:
(1) Grinding method of roll surface with double row cylindrical roller bearings:
The inner ring of cylindrical roller bearing grinding roll surface based on inner ring raceway becomes rigid component on roll neck through interference fit heat installation, and then the geometric precision of grinding roll surface based on raceway surface is required to be high (small roundness, high hardness, fine smoothness). The geometric precision of grinding roll surface based on inner ring raceway is also required to be high (concentricity, fine smoothness). The roundness can be controlled within 0.02mm and the smoothness can reach 0.4um, which improves the shape and surface quality. It can reduce the number of passes (1-2 times) of the subsequent cold rolling mill. At the same time, the inner ring can protect the roll neck surface from wear and ensure that the diameter of the roll neck is not reduced (see figure 3).
related news
CHG Bearing-High quality Large bearing rollers production line
Jun 12, 2024
CHG Bearing high quality large cylindrical rollers, tapered rollers and spherical rollers of high-reliability, long-lifespan manufactured by the enterprise, accuracy can reach G1, G 1A (Class I), G2, G2A (Class II), and are mainly applied in wind power spindle bearings, yaw pitch bearings, speed-increasing box bearings, rolling mill bearings and other bearings.
CHG bearing chief engineer guides customers bearing installation
Jun 06, 2024
CHG bearing chief engineer guides customers bearing installation and use Four rows cylindrical roller bearings FC4058192 and angular contact ball bearings 7038ACP5/DB
CHG Bearing shines at the CR Expo & HTF, Thin section bearing and rolling mill bearings attract much attention
May 21, 2024
Recently, the much-anticipated 2024 China-Russia Expo and the 33rd Harbin International Economic and Trade Fair concluded successfully. At this international event, Luoyang Huigong Bearing Technology Co., Ltd.(CHG Bearing) has won the favor of many domestic and foreign merchants with its excellent technical strength and high-quality products. Especially in terms of thin section bearings and rolling mill bearings, the company has demonstrated its strong R&D strength and exquisite production technology, winning the attention and praise of many customers.
CHG Bearing's Chief Technical Engineer's Customer Service Journey
Apr 23, 2024
In the field of bearing manufacturing, CHG Bearing has won wide recognition from customers for its high quality products and professional services. CHG Bearing's products cover rolling mill bearings, thin section bearings, precision ball bearings, slewing bearings, crossed roller bearings and large rolling elements, etc. Each of them carries our pursuit of quality and technological innovation.
Email Skype Whatsapp