High-Speed Open Type Stainless Steel Bearings SMR117K MR117 Premium Quality Deep Groove Ball Bearings Hardware Tools

Please click to view all bearing roller sizes in our store. http://item.taobao.com/item.htm? spm=a1z10.5.w4002-1735353280.36.VaAgkF&id=13438337718 Model MR117 (open) Size Inner diameter(d) 7 MM The outer diameter(D) 11 MM Width(B) 2.5 MM The seal in the form Open (without sealing cover) Quality level Multiple options (see product details) Bearing material Multiple options (see product details) Weight G Notes: different manufacturers, the bearing model (code) will also be expressed in different ways, such 608Z=608ZZ=608-2Z=R2280ZZ=MR608Z=RV822 wait, in fact, they are all 608 metal cover bearings with the same size of 8227(mm), order they are bearing size as the main basis. Bearing material and quality please [Color compartmental]] then, 【Key 【 inner diameter] select other by default, you can directly order. If you don't know, please contact customer service! ********************************************************************* bearing grades mainly include: general level, motor level, high quality. 1. Ordinary class: national standard basic P0 level. The dimensional accuracy is less than ± 0.05mm, and the rotating speed is less than 1000rpm, suitable for low-speed and low-demand environments. For example, low-speed transmission equipment, Truckle, baby carriages, toy cars, etc. 2. Motor level: national standard P0Z2 or above. The dimensional accuracy is less than ± 0.01mm, the hand feels smooth, and the rotating speed is less than 20000rpm, low noise and long service life. It is suitable for motors, toy models, automobiles, electric tools, pneumatic tools, telecommunications equipment, fitness equipment, sports equipment, etc. 3. High quality: national standard P6 or or above. The dimensional accuracy is less than ± 0.005mm [can replace imported], the hand feels smooth, the rotating speed is more than 20000rpm, the noise is low, and the service life is long. Applicable to high-speed motor, high-speed models, instruments, precision equipment, high-end toys and other fields with high requirements. ********************************************************************* bearing materials mainly include: iron sheet, carbon steel, bearing steel, stainless steel, plastic, ceramics and other new materials. 1. Algam and [carbon steel] materials: low hardness, poor product precision and stability, and short service life. The quality is very poor, and we will not sell it. 2.[Bearing steel] material: also known as [chrome steel], Steel brand: GCr15 is a special steel for international bearing industry standard. It is the same kind of steel as AISL52100 (USA), DIN100Cr6 (West Germany), BS535A99 (UK), etc. It has the characteristics of long service life, high precision, low calorific value, high speed, high rigidity, low noise, high wear resistance, etc. Widely used in high-speed motor, automobile industry, fitness equipment, instruments, precision equipment and other fields. 3. [Stainless steel] material the default stainless steel 440C material ( magnetic) it is an environmentally friendly standard steel for bearing industry with a waterproof, anti-rust, anti-corrosion, acid alkali resistance, strong stability, maintenance-free, long service life and no rust. These clusters are commonly used in food machinery, medical equipment, instruments and meters, high-grade crafts, high-grade fishing gear, fishing wheel, high-grade toys, etc. Please do not use magnetism to judge the advantages and disadvantages of stainless steel bearings. Rust is the hard truth. 4. [Non-magnetic 304 stainless steel bearing]]: its acid and alkali resistance is better than stainless steel 440C material. However, due to the material characteristics and low hardness, its product has poor hand feeling and quality appearance. It is only suitable for low rotating speed and low load, and cannot be used on motors. Generally, it is not used as industrial grade rolling bearing raw materials. 5. [Plastic] and [Ceramic] and other materials: it is mainly used in special fields such as insulation and non-magnetic. For more information, see the store communication area. Buyers are requested to purchase suitable bearings according to actual needs. If you have any questions, please contact customer service. Customer service: customer service: 1. Express delivery: Our default is Tiantian and YTO Express, urgent items can be sent to SF Express (freight collect or make up the difference). 2. Receipt: We can issue a receipt for free. Please leave a message if necessary. 3. Invoice: the prices of all products in this store are excluding tax. If you need to issue an invoice, please make up the tax. General tax invoices: 200 yuan (RMB) or less 10 yuan taxes 200 yuan or above and the total amount of 6% taxes. Value-added tax invoices: the cumulative amount of 2000 yuan or above only can be issued, plus the total amount 13% of the tax. 4. Freight: the first weight of express freight is 1KG. If you are overweight, you need to continue to add the corresponding freight. The default freight of our store has been basically set. If you make some mistakes, you will be refunded more and less according to the actual freight. 5. Delivery time: Our company is located in the industrial zone, which is relatively remote. Express delivery only comes once every day around 4 pm. Please try your best to buy it before 4 pm. We will deliver the goods in time. Please forgive me if there is any delay. Thank you again for your support to our store!!!