Excavator undercarriage parts are confusing, the price difference between different manufacturers of the same product is very large, customers will feel that they don’t know how to choose, the following to share the secrets of this to make it easier for you to choose, the following to share the secrets of this to make it easier for you to choose the product, the following are common in the market as an example of the PC-200 track roller.
Currently on the market PC-200 support wheel has more than 200 yuan,more than 300-400 yuan, more than 500-700 yuan grades, the track roller cost is mainly by the following parts of the cost of a comprehensive composition, the track roller cost is mainly by the wheel body, axle tiles, floating seal assembly, inside and outside the cover and other components to decide.
1. Track roller body
1. Material and heat treatment:
High-end track roller products: track roller body material for 40Mn2 round steel, heat treatment for the overall heating for heat treatment, surface hardness in 50-60HRC hardened layer depth in the range of 6-30, the base hardness to meet the requirements of the drawings to ensure that the product has a better wear resistance and adequate load-bearing capacity.
Medium grade products: material for 50Mn round steel, take medium frequently process, surface hardness of 50-60HRC quenched hardened layer of more than 5, the quenched hardened layer is shallow, the material and abrasion resistance is poor, the substrate for the steel substrate, bearing capacity is poor.
Low-end products: the material is 45 steel or 50Mn billet forging, through the medium frequency treatment, poor material and bearing capacity is very poor, heat treatment indicators are only in line with the drawings, but can not talk about quality.
2. Structure: low-end products relative to high-end product, low-end products are very large oil cavity, reduce the overall weigh to reduce costs. For example: to PC200 track roller, low-end track roller weight is generally about 27 kilograms, mid-range products for 30-33 kilograms, the standard high-end product for 40-42 kilograms. The same big wheel body, the weight difference is huge, the material is different, the price is also different.
2. Axle of track roller
The middle and high end products are made of 50Mn tempering treatment, and then the surface is medium frequency, and the surface roughness is within 0.8, while the low end products are made of 45 steel without tempering, the axel diameter thin, the surface is high frequency, the smoothness is poor, and the depth of the heat treatment hardening layer is not enough, and the abrasion resistance is not good and the surface is rough.
3. Track roller shaft tile
The thickness of copper layer of axle shaft tile is 0.7~1.2 mm for middle and high end products, while the thickness of copper layer of low end products is 0.2-0.4 mm, and the length of axle shaft tile of low end products is less material. By cutting corners to reduce costs, resulting in products that are not wear-resistant and have a short service life.
4. Track roller floating seal assemble
The middle and high end seal material is 15Cr3Mo, the service life is 4000-5000 hours art least, and the low-end product seals will reduce the alloy element, mostly 15Cr1Mo, to reduce the cost.
5. Counterweight wheel cover
High-end products use QT450-10 material, low-end products can not reach the standard requirements of the spheroidization rate, the performance is slightly higher than cast iron, but also to reduce the material requirements to achieve the purpose of reducing costs.
Post time: Jul-24-2024