Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd.
Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd.
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June 28, 2023

High quality bearing on sale

We are bearing factory in China. If you have any interest in bearing just call us . As we moved new office all bearing are on hot sale .

September 15, 2022

electric drill powerful cordless drills rechargeable drill

LS is a professional supplier specialized in power tools, hand tools, garden tools, airtools, equipment for more than 15 years!We have become a leading enterprise in the tool industry and the benchmark of the Alibaba Jinhua area. We support a one-stop solution of the OEM/ODM business and our brand business. Electric drill products used at home (known as DIY abroad) have low requirements for service life, work efficiency, processing accuracy, etc., and the number of products is large, accounting for about 70~80% of the total electric drill products; another 30~20%. Electri

September 06, 2022

High Durability Two batteries power tools drill

High Durability Two batteries power tools drill Principle: The working principle of the electric drill is that the motor rotor of the electromagnetic rotary or electromagnetic reciprocating small-capacity motor performs magnetic field cutting and work operation, and the operating device is driven by the transmission mechanism to drive the gear to increase the power of the drill bit, so that the drill bit scrapes the surface of the object and penetrates the object better. Application: 1. Construction and Industry It is widely used in the reinforcement of bui

August 18, 2022

How to distinguish bearing accuracy? Bearing tolerance class

The key to bearing tolerance level is to determine the rotation accuracy of the shaft to the supporting point. Level 0: Generally used for bearing systems with a rotation accuracy of more than 10 microns, and the application is very common. For example, the speed regulation mechanism of ordinary CNC lathes, the knife mechanism, the speed regulation mechanism of cars, the speed regulation mechanism of large tractors, and the rotation mechanism of ordinary chemical machinery such as motors, centrifugal pumps and agricultural machinery. Level 6, Level 5: In precision

August 02, 2022

What is a piston, and what does it do

A piston is at the heart of a reciprocating engine. It consists of a moving circular peice of metal with piston rings to achieve an air-tight seal once it is installed within the engine cylinder. The piston is attached via a piston/gudgeon pin to a connecting rod, which in turn is connected to the crankshaft. In four-stroke (gasoline and diesel) car engines, the intake, compression, combustion and exhaust process takes place above the piston in the cylinder head, which forces the piston to move up and down (or in and out in a flat engine) within the cylinder, thereby causing th

July 25, 2022

Piston and Piston Rings

A piston is a cylindrical engine component that slides back and forth in the cylinder bore by forces produced during the combustion process. The piston acts as a movable end of the combustion chamber. The stationary end of the combustion chamber is the cylinder head. Pistons are commonly made of a cast aluminum alloy for excellent and lightweight thermal conductivity. Thermal conductivity is the ability of a material to conduct and transfer heat. Aluminum expands when heated, and proper clearance must be provided to maintain free piston movement in the cylinder bore. Insufficient clearance can

July 14, 2022

Cylindrical Roller Bearings

Cylindrical rollers and raceways are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the retaining edge of the ring is small, which is suitable for high-speed rotation. According to whether the ring has ribs, it can be divided into single row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double row cylindrical roller bearings such as NNU and NN. The bearing has a separable inner ring and outer ring structure. Cylindrical roller bearings with no ribs on the inner ring or outer ring, the inner ring and outer ring

July 04, 2022

The use conditions and environmental conditions of spherical roller bearings

The use conditions and environmental conditions of spherical roller bearings Correctly grasping the location of the spherical roller bearing in the mechanical device and the conditions of use and environmental conditions are the prerequisites for choosing a suitable spherical roller bearing. For this, it is necessary to obtain the following data and information: (1)

June 20, 2022

Auto parts are on fire! Bearing market opportunities cannot be ignored

1. Oligopoly, the new force is big but not strong Bearings play a crucial role in mechanical equipment (supporting the rotation of the machine), just as joints play a vital role in a person. Schematic diagram of bearing parts This seemingly ordinary small part has a market size of more than 100 billion in the world (the global bearing market size has reached 120 billion US dollars in 2021). The Asian region, which has a broad industrial market base, consumes more than 50% of the world's bearings. Bearing market size The

June 09, 2022

Why do bearings rust? How to prevent bearings from rusting?

As we all know, bearings are precision mechanical parts that require high precision and high surface finish, and corrosion will make the bearing lose its original precision and finish, which will directly affect the performance of the bearing, reduce its service life, and even scrap it. In the process of bearing production and processing, if the rust prevention management measures are improper, it will cause a large amount of rust of semi-finished products and finished parts, which will seriously affect the balance connection and the completion of tasks on time. Therefore, bearing anti-rust ma

June 01, 2022

SKF Cylindrical Roller Bearing NU220 roller bearing

Cylindrical roller bearing Cylindrical rollers and raceways are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the rib of the ring is small, which is suitable for high-speed rot

May 24, 2022

Wholesale Car Auto Wheel Hub Bearing DAC5378 Original

Wheel bearing is applied to automobile axle to load and provide accurate guide components for the rotation of the wheel hub, both bearing axial load and radial load. It has good performance to installing , omitted clearance, light weight, compact structure, large load capacity, for the sealed bearing prior to loading, ellipsis external wheel grease seal and from maintenance etc. And wheel bearing has been

May 16, 2022

custom piston Low Compression For BMW

The piston is the reciprocating part in the cylinder block of the automobile engine. The basic structure of the piston can be divided into top, head and skirt. The top of the piston is the main part of the combustion chamber, and its shape is related to the type of combustion chamber selected. Gasoline engines mostly use flat-top pistons, which have the advantage of small heat-absorbing area. There are often various pits on the top of the di

May 07, 2022

High Chrome racing car spare parts engine valves

racing car spare parts engine valves The material of engine valve is heat-resisting stainless steel. These engine valve possess high strength, anti-wear, anti-corrosion and hear-resisting. The material of custo

April 14, 2022

NEW Product Flanged Automotive Deep Groove Ball Bearing QJ4580ZV

Bearings are basic parts, and bearings are standard parts. Any mechanical equipment that needs to be rotated needs bearings, supports, and bearings in mechanical equipment to prevent friction and bear loads. Bearings are generally divided into rolling bearings and sliding bearings. At present, Sliding bearings have been gradually eliminated, but they still have their uses. As rolling bearings that are more

March 17, 2022

High quality 23122 spherical roller bearing

A spherical roller bearing is a rolling-element bearing that permits rotation with low friction, and permits angular misalignment.Typically these bearings support a rotating shaft in the [bore] of the inner ring that may be misaligned in respect to the outer ring.

February 22, 2022

best quality Engine Assembly intake exhaust engine valve

Engine function The function of the valve is to input air into the engine and discharge the exhaust gas after combustion. From the structure of the engine, it is divided into intake valve and exhaust valve. The function of the intake valve is to suck air into the engine and mix it with the fuel; the function of the exhaust valve is to discharge the burned exhaust gas and dissipate heat. composition The valve is composed of a valve hea

February 16, 2022

6318 deep groove ball bearing

Deep groove ball bearing (GB/T 276-2003) T

February 08, 2022

We are back to work

Hello all the friend, we had back to work today . If you have any require about ball bearing, roller bearing, tapered roller bearing, pillow block bearing,Engine Valve, Piston , Piston ring etc,please feel free to contact us.

January 17, 2022

Spherical roller bearings

Spherical roller bearings have double row rollers, the outer ring has a shared spherical raceway, and the inner ring has two raceways that are inclined at an angle relative to the bearing axis. This ingenious structure makes it have self-aligning performance, so it is not easily affected by the angle between the shaft and the bearing box seat on the error or the shaft bending, and is suitable for the occasions where the installation error or the shaft deflection causes the angle error. In addition to bearing radial load, the bearing can also bear axial load acting in both directions.

January 07, 2022

Shijiazhuang Longshu Ball Bearing Co.,Ltd

Shijiazhuang Longshu Bearing Co.,Ltd is establish in 2002 and developed foreign trade business in 2015,it is one of the largest domestic and imported bearing manufacturer and distributor integrating the research, development and sales of bearing. We specialize in providing all kinds of bearings, such as Deep Groove Ball Bearing , Tapered Roller Bearings ,Spherical Roller Bearing, Cylindrical Roller Bearing, Angular Contact Bearing ,Pillow Block Bearing & Imported famous brand bearing: SKF, NSK, NTN, TIMKEN, FAG, NACHI, INA, KOYO etc. With more than 15 years` e

January 07, 2022

Angular Contact Ball Bearing

Angular contact ball bearings mainly bear larger unidirectional axial loads. The greater the contact angle, the greater the load-bearing capacity. The cage materials are steel plate, brass or engineering plastics, and the forming methods are stamping or turning, depending on the bearing form or use conditions. There are other combined angular contact ball bearings, double row angular contact ball bearings and four-point contact ball bearings. Angular contact ball bearings can bear radial load and axial load at the same t

January 04, 2022

Cylindrical Roller Bearings

Cylindrical rollers and raceways are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the retaining edge of the ring is small, which is suitable for high-speed rotation. According to whether the ring has ribs, it can be divided into single row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double row cylindrical roller bearings such as NNU and NN. The bearing has a separable inner ring and outer ring structure. Cylindrical roller bearings with no ribs on the inner ring or outer ring, the inner ring and outer ring

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