about the air random orbit sander choose some introduction

Many friends asked me about the price of the pneumatic sandpaper machine, and I replied, "quote according to different configurations". Because we can't make a unified quotation to customers just based on the appearance, I think it is irresponsible if just general quotation. Some customers take a picture to buy a air orbit sander , I think heis purely a chance, for this, I put some personal views summarized as follows, I hope to give you some suggestions for reference.

The design of pneumatic random orbit sander , the original intention is to imitate artificial sandpaper grinding, through the irregular rotating movement of the sandpaper surface grinding operation, according to the different eccentric axis, divided into eccentric 8mm, eccentric 5mm and eccentric 3mm three categories, corresponding to different grinding process. I think it will be more realistic for customers to choose from this aspect.

Eccentric 8mm is mainly similar to the surface cutting function, belongs to the original primary grinding process, such as in the ship repair, car repair and other sheet metal operations, destroy the original rust surface, remove the embroidered surface, and the furniture industry wood furniture surface grinding machining, construction industry wall grinding machining these.... So the main requirements of these users are- - - - "strong power" because in China, the 8mm offset of 8 mm is relatively low, and even if you do eccentric 9mm 10mm, users can accept or like more. This bias is used with 6 "or 7" and a few 8 " grinding , with the coarsest 40 #, 60 # and 80 # sandpaper. This requires more power to drive the motor set, and to increase power, you must use iron rotor or stainless steel rotor, increase the kinetic energy from weight, on this basis to improve the kinetic energy needs to cooperate with high speed bearing, some users want to have 10mm eccentric, however, more eccentric and kinetic energy will bring greater vibration, artificial use easy to hand, especially big power to use more rotor, cylinder, shell, which lead to the overall weight of the sander will increase. In this case, it is very easy to use in the horizontal surface operation, the heavier body can reduce the manual control strength, but, when the vertical surface or the surface operation, need to consume more physical strength, especially in the high altitude work, long-term use will be more likely to fatigue, once the body drop is easy to produce danger. So we should choose the configuration according to the specific working environment, rather than blindly increase the eccentric axis, increase the disk surface. Some factories only a set of power set, at the same time applied to 4 "5" 6 "7" all models, mass production makes the average cost lower, so cater to the demand of a group of customers for low prices, they only ask the bigger the plate, the cheaper the better, finally take the past most said no strength, power is too low, never a few times.

Eccentric 5mm is mainly finishing coarse grinding, Most of them are the first finishing after sheet metal operation and blank surface in the furniture industry, The demand of these users is strong power with high speed, Most applications are 5 " disks, Cooperate with 120 # 180 # or higher numbered sandpaper, This quality requirement for the pendulum is relatively high, In the case of orbit sizequality assurance, Is the grade of the assembled bearings, The cheapest bearing is less than 0.2$, The better bearing cost price exceeds 5$, Power group (air cylinder, Upper and lower cover plate, rotor, Precision and wear resistance of the blade), These will affect the performance and service life of the product, At the same time, we can choose aluminum shell and plastic steel shell according to the needs, This is mainly due to the consideration of the body weight, Discuss it with the eccentric 8 time above. On this basis, our selected dynamic rotor is divided into iron rotor, stainless steel rotor, and plastic rotor. Iron rotor and stainless steel rotor are mainly to increase kinetic energy in weight, iron rotor is cheap, but easy to rust, because many users air compressor air source is not dry. High processing cost of stainless steel rotor. The plastic rotors are the cheapest, light weight can obtain a higher speed, mainly to increase the kinetic energy from the speed, but the grinding strength is weakened compared to the previous two. Then in the above three categories, many of our rotors are made into hollow rotors, but also in order to get a higher speed. So a lot of heavy sandpaper machines have plane grinding, and many videos see some good sandpaper machines need to be held by hand, because the vibration is small and the body weight provides enough kinetic energy without the need to press by hand. Plastic steel shell, stainless steel hollow rotor or plastic steel rotor.

Eccentric 3mm some eccentric is 2.5mm, mainly for the high precision surface of the fine grinding, such as our mobile phone and other digital products of metal shell surface finishing, for the choice of the body, the power material and motor materials are higher, mainly requires high speed, high precision, manipulator use more stainless steel rotor, artificial grinding more choose plastic steel rotor.

About the shape of the sandpaper machine, simple summary: all the shape of the handle, is designed to increase the comfort and stability of manual grip, in order to reduce vibration, not numb hands, palms sweating and not skid.... It's not that the more beautiful, the better, the product color is only related to personal preference. Chassis is divided into the most round, square, rectangular, peach, long shape and polished wooden hand guard of the kind of alien.... These are all related to the millstone material.(The grinding plate and sandpaper belong to the consumables category, the next time again focus on the introduction)

Finally, if it comes to the material of the sandpaper machine, this is the biggest factor in opening up the price. The eccentric shaft is divided into 45 # steel, A3 steel, 20 Gr, 20GrMo, 40 GrMo, the price of their own imagination. Then the cylinder and the upper and lower cover plates are divided into powder metallurgy cylinder and die casting cylinder, die casting cylinder materials are divided into 20GrMnTi, 20GrMo, 40GrMo, all kinds of plastic rotor is also according to different materials and lead to different stability, more complex do not introduce, good plastic steel rotor are using professional POM rotor materials. Iron rotor and stainless steel rotor, also divided into 20GrMo 40GrMo, 45 # steel, and then die casting cylinder and metal rotor need to undergo heat treatment process to increase stability and service life (some bargains really do not have heat treatment). Finally, the bearing, a big factor to open the speed, ordinary cheap 6028 bearing as long as 0.2$, good products are Japanese imported IJK, EZO, TPI or NSK (must be real).Check the quality gap by yourself. For example, MirKa is the IJK and TPI bearings. Then there is the product shell, the aluminum die-casting shell is basically just an aluminum purity problem, and then some good models will go through the heat treatment process to increase the hardness and stability. Plastic steel shell and plastic steel rotor according to the material to open the cost price. Our good plastic steel materials are all made of engineering plastic steel materials provided by Mitsubishi of Japan. The leaves are mainly made of epoxy resin cushion wood, and the grade is divided into 1 # 2 # 3 #. For example, Danadore is used with 3 # gray grid leaves, and we also use 2 # black leaves. But the cheap machine is certainly 1 # material, and then go down, some rubber wood leaves I also can not say (in short is cheap). Although the price gap is not much money, but it is several times, especially as consumables purchase, the cost is too bad many times.

If you are interested in reading these and are interested in our products, please name your target price, customer base or user needs, we can provide you with the corresponding model and quotation, or batch OEM customization.

                   CHINA PROFESSIONAL AIR TOOLS SUPPLIER KUANAI INDUSTRY LTDAKEN SHENG

                                                    Aug 12^th 2024