Bore Dimension: 10 – 50 mm
Applicable Industries: Creating Material Retailers, Production Plant, Equipment Fix Stores, Meals & Beverage Manufacturing unit, Energy & Mining, Meals & Beverage Retailers, TT Motor DC Gearbox Motor Twin Shaft 200RPM DC 3-6V Gear Motor Suited for Do-it-yourself Sensible Auto Robot Other, Advertising Company
Variety: Needle
Model Number: NA4903 2RS
Precision Rating: P0
Seals Sort: Two Seal
Amount of Row: Solitary row
Bore Dia.(mm): seventeen
Outdoors Dia.(mm): 30
Width(mm): 14
Fat(kg): .04
Dynamic Load Capability(N): 8800
Static Load Potential(N): 11000
Max. RPM: 9000
Race Substance: Chrome Metal
Cage Materials: Steel Sheet
Roller Material: Chrome metal
Packaging Details: inside of packing white box , outside the house packing is neutral carton

NA4903 2RS Needle Roller Bearing With Machined Ring With an Internal Ring Two Lips Seals on Each Aspect Open up 17x30x14 mm

  • it is composed of a machined outer ring with rib, a needle roller and cage assembly and a separable internal ring, 2 lip seals
  • extremely clean bearing steel race and thicker cage, good superfinish OD and conclude confront.
  • it has a temperature resistance ranging from -10 ° 190x400x132mm Steel Cage 22338 CCW33 Spherical Roller Bearings C up to one hundred °C
  • it suited for the shaft does not have a bearing raceway

  • Technical specs
    Bore diameter (mm):seventeen
    Outside the house diameter (mm):30
    Interior ring width (mm):14
    Outer ring width (mm):thirteen
    OD of inner ring (mm):22
    Radius (mm):.3
    Dyamic load ranking (N):8800
    Static load score (N):11000
    Max RPM:9000
    Bodyweight (kg):.04
    Race content:chrome metal
    Seals content:nitrile rubber
    Cage substance:metal sheet
    NA49…2RS Sealed Needle Roller Bearings
    DesignationDimensions (mm)Load Score (KN)Max rpmWeight
    dDBFDyn.Stat. kg
    NA 4900 2RSten221414six.eightsix.nine13000.571
    NA 4901 2RStwelve24fourteensixteenseven.sixeight.312000.571
    NA 4902 2RS1528fourteentwenty8.6ten.threeten thousand.037
    NA 4903 2RSseventeenthirty14228.eight119000.04
    NA 4904 2RStwenty3718twenty five17.319.97500.08
    NA 4905 2RS25forty twoeighteen3019.324.two6500.09
    NA 4906 2RSthirtyforty seven183521.128.five5500.104
    NA 4907 2RS35fifty five214226.539.54800.075
    NA 4908 2RSforty6223forty eight36534200.252
    NA 4909 2RSforty five6823fifty two38fifty nine3900.29
    NA 4910 2RSfifty72235840643500.295
    Packing & Delivery

    About C&H C&H is a hgih good quality bearings suppliers. We have skillful and instruction team. Most of them have above twenty years expertise.The top quality handle covers pre-sales aduit, Producer wholesale ball bearings deep groove ball bearing process handle, last product re-inspect and after-income support. The rigorous and complete procedure capability and quality handle can assure to source best-class goods and support.The skillful engineer team can provide great help in technological and support clients to create all sorts of new goods.

    Exhibition Show

    What is a bushing?

    If you’ve ever wondered what an enclosure is, you’ve come to the right place. This article will provide an overview of different types of housings, including air-insulated, oil-impregnated porous bronze, and epoxy-impregnated capacitor cells. After reading this article, you will be better equipped to make an informed choice about the type of bushings your truck needs.

    air insulating sleeve

    When choosing bushings for your electrical application, you need to look for bushings with long-lasting insulation. In addition to being durable, bushings must have the correct design shape and material to remain effective over time. Porcelain was used in early casing designs and was chosen for indoor and outdoor applications due to its low cost and low linear expansion. Porcelain also requires a lot of metal fittings and flexible seals to remain effective.
    Solid bushings have a center conductor and a porcelain or epoxy insulator. They are used in low voltage electrical applications such as small distribution transformers and circuit switches. However, their low radial capacity limits their use in high-voltage applications, so they are limited to circuit switches and other low-voltage equipment. The electrical service duty of the bushing determines the type of insulation required.
    Another type of air-insulated bushing is made of conductive metal, which reduces heat transfer. This design enables it to operate over a range of temperature conditions. Additionally, air-insulated bushings are generally more effective than gas-insulated bushings in a range of applications. The main difference between air-insulated bushings and gas-insulated bushings is the insulating material. While gas-insulated bushings are usually made of high-quality materials, high-quality materials are still preferred in some applications.
    Elliott # B series insulators are 25 kV class and pressure molded cycloaliphatic epoxy resins. They feature knurled brass inserts and 16 UNC threads. If you choose this type, make sure it matches the exact diameter of your Elliott Class 25 kv air insulated bushing. These insulators also provide overall shielding and require openings to fit inch diameters.
    There are two types of air-insulated bushings: air-to-air and oil-to-oil. Oil is a stronger dielectric than air, and air-to-oil bushings are used to connect atmospheric air to oil-filled equipment. They are available for solid and capacitive hierarchies. So, which one is right for you? Just choose the right insulation to make your equipment as efficient as possible.

    Oil Impregnated Porous Bronze Bushings

    Oil-impregnated porous bronze (PbB) bushings are one of the best options for lubricating metal bearings. Lubrication is maintained even in high temperature applications as oil penetrates into the pores of the bronze. They are also self-lubricating and maintenance-free. Manufactured by CZPT, the Oil Impregnated Bronze Bushing is a powder metal process that is uniformly lubricated by a uniform oil film. This type of bearing is one of the most efficient in terms of precision performance.
    One major difference between oil-impregnated bronze bushings and standard cast bronze bushings is their manufacturing process. Oil-impregnated bronze bushings are pressed from powder and then sintered to form a hardened part. This method is very effective for high-volume manufacturing, but it also has its limitations. Oil-impregnated bronze bushings are cheaper and more efficient, but they have mechanical limitations.
    The production of oil-impregnated porous bronze bushings is simple. Powder bronze bushings are pressed and vacuum sealed by forcing oil into the pores. The low stress properties of oil-impregnated bronze bushings make them easier to manufacture in high volume. It also does not require additional lubrication. However, oil-impregnated porous bronze bushings have relatively low mechanical strength and are not recommended for applications where high temperatures are present.
    Oil Impregnated Porous Bronze is also known as BPPB. Unlike traditional oil-impregnated bronze bushings, BPPB bushings have a high oil retention capacity. This means they will last a long time and you will save a lot of maintenance costs. But be careful. Porous bronze bushings can only last so long without oil.
    Oil-impregnated bronze bushings are a good choice if dimensional consistency is important. BP bronze bushings have the same C dimension as solid metal bushings. While the CZPT is a ghost of the past, there are now many powder metal manufacturers producing BP housings. Their C of F values ​​range from 0.04 to 0.08.

    Epoxy Impregnated Capacitor Batteries

    Epoxy impregnated condenser core sleeves are conductive paper used in air conditioning systems. The paper core is coated with epoxy resin and the insulating shell is silicone rubber. RIP bushings have excellent electrical properties, are fire resistant and are relatively small. However, the process of making these products is not easy and mistakes are common. These defects manifest as cracks or other structural damage in the capacitor cells.
    RIF (Resin Impregnated) bushings feature a finely graded design. The capacitor core is made of glass fiber impregnated with epoxy resin. The outer insulation is made of silicone rubber sheds glued directly to the capacitor core. These bushings are designed for small clearances, so no filler material is required.
    In order to determine whether the RIP sleeve is void-free and dry, the insulating paper must be impregnated with epoxy resin. The process is similar to making conventional condenser core sleeves, but with greater flexibility and robustness. The main difference between RIP bushings and conventional insulators is the epoxy content.
    Capacitor grading bushings are also available. These bushings increase the electric field at the ends of the capacitor core plates. The higher the temperature, the higher the electric field. These properties make resin-impregnated capacitor mandrel sleeves reliable. However, capacitor grade bushings have higher electric fields than nonlinear bushings.
    The capacitor core of the present invention is made by winding paper around the winding tube 3 . The paper may contain an intermediate conductive foil. The winding tube is then covered with electrical insulator. Afterwards, the capacitor core 1 will be RIP and electrically connected to the electrical conductor 6 .
    To further characterize the performance of RIPs, thermal shock current (TSC) was used to determine their trap parameters. Unmodified epoxy resin and nano-SiO2 modified RIP were tested. The RIP samples were polarized under a 2 kV/mm electric field at 333 K for 10 min and then subcooled to 193 K with liquid nitrogen. TSC curves were obtained at 3 K/min and 383 K.

    plastic bushing

    Plastic bushings are essential for many industries. They protect wires and other mechanical parts. They come in many shapes and sizes and are often used as adapters when connecting two pipes or tubes of different diameters. They are available in a variety of materials including rubber, steel and various other plastics. Most bushings are cylindrical or conical in shape and made of shock absorbing material. They slide on rods or pipes to provide low friction motion.
    Plastic bushings can be made from a variety of materials, including phenolic, polyethylene, and nylon. While phenolic resins have long been the preferred choice for heavy-duty applications, nylon is the most commonly used lining plastic. Nylon has several advantages, including low friction, no lubrication, quiet operation, and low wear. In addition to these advantages, it is easy to form and cast. In order to obtain better mechanical properties, fillers such as molybdenum disulfide can be added to the material. Plus, filled nylon parts resist deformation at temperatures up to 300 degrees Fahrenheit.
    Another benefit of plastic bushings is their low cost. Much cheaper than metal, plastic is a versatile material that can be used in a variety of industries. A quick installation and replacement process makes them the first choice for users who need to install new components quickly. Plus, plastic bushings don’t wear out as quickly as metal, which is another benefit. And because the wear rate of plastic bushings is predictable, manufacturers can easily replace them before they start to fail. And they last longer, so you save time and money.
    Plastic bushings are widely used in machinery with sliding and rotating shaft components. They have excellent load-carrying capacity and anti-friction properties. They are essential to many industries, including construction, mining, agriculture, hydropower, transportation and food processing. They are easy to install and come in a variety of sizes and shapes. They are very durable and very reliable. They reduce machine wear and are less expensive than bearings.

    China NA4903 2RS Needle Roller Bearing, Precision Ground, Steel Cage, Double Sealed, Oil Hole, Metric, 17mm ID, 30mm OD, 14mm Width     ball bearingChina NA4903 2RS Needle Roller Bearing, Precision Ground, Steel Cage, Double Sealed, Oil Hole, Metric, 17mm ID, 30mm OD, 14mm Width     ball bearing
    editor by czh 2023-02-19