Tapered Roller Bearings and Pump Shaft Bearing Installation

First, the bearing installation:

Bearings must be installed in a dry, clean environment. Care should be taken prior to installation to check the mating surfaces of the shaft and housing, the end faces of the shoulders, the quality of the grooves and connecting surfaces. All mating surfaces must be carefully cleaned and deburred, castings must be cleaned of virgin surface sand.

Bearings should be installed before using gasoline or kerosene clean, dry use, and ensure good lubrication, the bearing is generally used for grease lubrication, oil lubrication can also be used. Grease lubrication, should be selected without impurities, anti-oxidation, rust, extreme pressure and other excellent performance grease. Grease filling capacity for the bearing and bearing box 30% -60%, not too much. Double row tapered roller bearings with sealed structure and pump shaft bearing have been filled with grease, the user can directly use, can not be cleaned.

Bearing installation, you must exert equal pressure on the circumference of the ferrule end face, the ferrule pressed into, may not be used first-class tools such as direct impact on the bearing face, so as not to damage the bearings. In the case of a small amount of interference, the sleeve can be used at room temperature under pressure bearing sleeve end face, with a head hit the sleeve, the sleeve through the ring into a balanced pressure. If the high-volume installation, hydraulic machine can be used. When pressed in, should ensure that the outer ring end face and the shell shoulder end face, the inner ring end face and the shaft shoulder end face compact, does not allow a gap.

When the interference is larger, the oil bath heating or sensor heating method can be used to install the heating temperature range of 80 ℃ -100 ℃, the maximum can not exceed 120 ℃. At the same time, the use of nuts or other appropriate method of fastening the bearing to prevent the bearing cooling shrinkage in the width direction between the ring and the shoulder gap.

Single row tapered roller bearing installation should finally be carried out clearance adjustment. Clearance value should be based on different conditions of use and the size of the interference with the specific to determine. When necessary, should be tested to determine. Double row tapered roller bearings and pump shaft bearings have been adjusted in the factory clearance, no need to adjust the installation.

After installation, the bearing should be subjected to rotation test. First, it should be used on the rotating shaft or bearing box. If there is no abnormality, the bearing should be powered at no-load and low-speed. Then, the rotation speed and load should be gradually increased depending on the operation condition. Noise, vibration and temperature rise , Found abnormal, should stop running and check. Operation test after normal delivery.

Second, the bearing removal:

After the bearing is removed and it is intended to continue to be used, appropriate disassembly tools should be used. Remove the interference with the ferrule, tension can only be added to the ferrule, transmission of disassembly force will never be allowed through the rolling element, otherwise the rolling element and raceway will be crushed.

Third, the use of bearing the environment:

According to the use of parts and conditions of use and environmental conditions to choose size, precision, with appropriate bearing is to ensure the bearing life and reliability of the premise.

1, the use of parts: tapered roller bearings for radial load to bear the radial and axial joint load, usually two sets of bearings used in pairs, mainly in front and rear wheels of the car, driving bevel gear, differential Gear reducer and other transmission parts.

2, Allowable speed: In the installation of correct, well-lubricated environment, allowing the bearing speed limit of 0.3-0.5 times. Under normal circumstances, to 0.2 times the speed limit for the most appropriate.

3, to allow tilt angle: Tapered roller bearings generally do not allow shaft relative housing hole tilt, if tilt, the maximum does not exceed 2 '.

4, the allowable temperature: In the normal load, and the lubricant has high temperature performance, and lubrication conditions, the general bearing allows -30 ℃ -150 ℃ ambient temperature work.

Investment Casting can make use of most metals, most commonly using steel alloys, carbon steel,stainless steel, and tool steel. This process is beneficial for casting metals with high melting temperatures that can not be molded in plaster or metal. Parts that are typically made by investment casting include those with complex geometry such as turbine blades or firearm components. High temperature applications are also common, which includes parts for the automotive, aircraft, and military industries.

Our products cover a wide range of industries including train & Railway, automobile & Truck, construction machinery, mining machinery, forklift, agricultural machinery, shipbuilding, petroleum machinery, construction, valve and pumps, electric machine, hardware, power equipment and so on. We are capable to produce products according to customers' drawings or samples, we focus on both carbon steel and alloy steel. Up to today, more than 100 raw materials and 5, 000 kinds of different products have been developed and produced by us. We are familiar with the material standards of many countries, such as Chinese GB, American ASTM, AISI, German DIN, French NF, Japanese JIS, British BS, Australian AS and Association of American Railroads (AAR ) and other industrial standards.

The process is generally used for small castings, but has produced complete aircraft door frames, steel castings of up to 3 tons and aluminium castings of up to 100 kg. It is generally more expensive per unit than Die Casting or sand casting but with lower equipment cost. It can produce complicated shapes that would be difficult or impossible with die casting, yet like that process, it requires little surface finishing and only minor machining.

Investment casting is used in the aerospace and power generation industries to produce turbine blades with complex shapes or cooling systems. Blades produced by investment casting can include single-crystal (SX), directionally solidified (DS), or conventional equiaxed blades. It is also widely used by firearms manufacturers to fabricate firearm receivers, triggers, hammers, and other precision parts at low cost. Other industries that use standard investment-cast parts include military, medical, commercial and automotive.

Investment casting offers high production rates, particularly for small or highly complex components, and extremely good surface finish (CT4-CT6 class accuracy and Ra1.6-6.3 surface roughness) with very little machining. The drawbacks include the specialized equipment, costly refractories and binders, many operations to make a mold, and occasional minute defects.

Material:
Alloy Steel:ASTM 430;ASTM410;ASTM 416,ect.Carbon
Steel:WCB,AISI1020;AISI1045;S355J2G3,S235JR,ect.
Stainless Steel:SS304;SS316;SS316L;17-4 PH;ect.Copper:C21000;C26800;C27000;C27200,ect.

Advantage
Can form complex shapes and fine details Many material optionsHigh strength partsVery good surface finish and accuracyLittle need for secondary machining

Applications:
Turbine blades, armament parts, pipe fittings, Lock Parts, handtools, agriculture parts,marine parts,medical parts,hardware,automobile parts,ect.

Investment Casting

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