BALLS Bi cầu thép Bi cầu thép Bi cầu thép tôi bề không rỉ mặt chống ăn mòn Bi cầu thép Bi cầu thép chịu nhiệt Bi cầu thép Carbon chống ăn mòn Bi cầu gốm Bi cầu nylon Balls Bi cầu đồng
Steel Balls for Ball Bearings Steel balls within ball bearings, are used for the rotating parts of all industrial machines and transportation vehicles, such as the automobile, home-electrical appliances and computers. The AKS steel ball is the best in the World for precision and durability. The material of a steel ball within a bearing is a high carbon chrome steel (SUJ2 *1.) Standards and specifications are regulated in accordance with JIS B 1501. The nominal manufacturing sizes of steel balls are shown in the table below (*2.) *1. Material regulated by JIS G 4805. *2. The ball name is the same as the ball size. Column No.1 of the table below shows dimensions in mm. Column No.2 is in imperial dimensions (1 inch = 25.4mm) Remarks. AKS can make additional ball sizes to those listed below, on customer request. Nominal Size Columun1 Columun2 Nominal Nominal Size Diameter Columun1 Columun2 Nominal Diameter 0.3mm 0.30000 16.0mm 16.00000 0.4mm 0.40000 21/32 16.66875 0.5mm 0.50000 17.0mm 17.00000 0.6mm 0.60000 11/16 17.46250 0.025 0.63500 18.0mm 18.00000 0.7mm 0.70000 23/32 18.25625 1/32 0.79375 19.0mm 19.00000 0.8mm 0.80000 3/4 19.05000 1.0mm 1.00000 25/32 19.84375 3/64 1.19062 20.0mm 20.00000 1.2mm 1.20000 13/16 20.63750 1.5mm 1.50000 21mm 21.00000 1/16 1.58750 27/32 21.43125 5/64 1.98438 22.0mm 22.00000 2.0mm 2.00000 7/8 22.22500 3/32 2.38125 23.0mm 23.00000 2.5mm 2.50000 29/32 23.01875 7/64 2.77812 15/16 23.81250 3.0mm 3.00000 24.0mm 24.00000 1/8 3.17500 31/32 24.60625 3.5mm 3.50000 25.0mm 25.00000
9/64 3.57188 1 25.40000 5/32 3.96875 26.0mm 26.00000 4.0mm 4.00000 1 1/16 26.98750 4.5mm 4.50000 28.0mm 28.00000 3/16 4.76250 1 1/8 28.57500 5.0mm 5.00000 30.0mm 30.00000 5.5mm 5.50000 1 3/16 30.16250 7/32 5.55625 1 1/4 31.75000 15/64 5.95312 32.0mm 32.00000 6.0mm 6.00000 1 5/16 33.33750 1/4 6.35000 34.0mm 34.00000 6.5mm 6.50000 1 3/8 34.92500 17/64 6.74688 35.0mm 35.00000 7.0mm 7.00000 36.0mm 36.00000 9/32 7.14375 1 7/16 36.51250 7.5mm 7.50000 38.0mm 38.00000 5/16 7.93750 1 1/2 38.10000 8.0mm 8.00000 40.0mm 40.00000 8.5mm 8.50000 1 5/8 41.27500 11/32 8.73125 1 3/4 44.45000 9.0mm 9.00000 45.0mm 45.00000 3/8 9.52500 1 7/8 47.62500 10.0mm 10.00000 50.0mm 50.00000 13/32 10.31875 2 50.80000 11.0mm 11.00000 55.0mm 55.00000 7/16 11.11250 2 1/4 57.15000 11.5mm 11.50000 60.0mm 60.00000 15/32 11.90625 2 1/2 63.50000 12.0mm 12.00000 65.0mm 65.00000 1/2 12.70000 2 3/4 69.85000 13.0mm 13.00000 3 76.20000 17/32 13.49375 3 1/4 82.55000 14.0mm 14.00000 3 1/2 88.90000 9/16 14.28750 3 3/4 95.25000 15.0mm 15.00000 4 101.60000 19/32 15.08125 115.0mm 115.00000 5/8 15.87500
Stainless Steel Balls for Ball Bearings SUS 440C (equivalent to AISI Type 440C) is used for its superior qualities of corrosion resistance, durability and workability. Its application is in bearings required for high precision. Also within high pressure ball valves and relief valves. Material Standards: JIS G 4303 (stainless steel bar) JIS G 4309 (stainless steel coil) Steel Ball Standards: Japan Bearing Industrial Association BAS 1007 (stainless steel ball for ball bearing) As other corrosion resistant hardened steel, AKS deals in the ACD34 Stainless Steel which decrease the carbon content. A special character of this ball is superior to Ball Waviness than usual corrosion resistant balls. Production sizes are in proportion to that of chrome steel balls Corrosion Resistant Hardened Steel Balls These are corrosion resistant hardened steel balls. Martensite stainless steel is used, SUS 440C, SUS 420J1, SUS 431. Applications for stainless steel balls with corrosion resistance and hardened by heat treatment are mainly in high pressure valves and relief valves. In general we manufacture the following ball sizes: 1/8-1 1/2 (3.175mm - 38.100mm) Corrosion Resistant Unhardened Steel Balls Austenite stainless steel is used for its superior corrosion resistance. Applications are mainly ball valves. Material specification: SUS 304 corrosion resistance due to low carbon content. SUS 316 superior for acid corrosion resistance. In general we manufacture the following ball sizes: 1/8-2 (3.175mm - 50.800mm)
Heat Resistant Steel Balls This steel ball is used in bearings with operate in temperatures around 300 degree with vacuum melted steels. Ball dimensional Accuracy is the same as that of chrome steel balls. Applications are heat proof bearings such as the Jet Engine Bearing. High Speed Tool Steel and Heat Proof Steel is used. Material specification: JIS G 4403 High Speed Tool Steels AISI M50 Heat Resistant Steels Manufactured sizes are the same as chrome steel balls Carbon Steel Ball The required ball strength is obtained through a carbonized quench. Applications are bicycles, casters, etc. The material mainly used in these applications is JIS G 3539. In general AKS manufactures ball sizes 1/8 to 1/2 inch, but additional sizes can be made to customer request. Ceramic Balls New ceramic balls have stable physical and chemical characteristics. They have high hardness, high strength at high temperatures, superior wear resistance and superior corrosion resistance with almost all chemicals. Applications are heat-proof wear resistant bearings and chemically resistant bearings and chemically resistant valves. Normal manufactured ball range is from diameter 0.5mm to 3 inches (76.2mm), with variations according to customer request. In addition AKS manufactures special formed balls, like grooved balls, perforated balls and balls for ball point pens. Types of Fine Ceramics Non-oxide Fine Ceramics Applications are heat proof, wear resistant bearing balls and other various uses. *Silicon Nitride (Si 3 N 4 ) Qualities are: small thermal expansion coefficient, large themal shock resistance and superior creep resistance. *Silicon Carbide (SiC) Heat resistant ceramics with stability up to 1,600 degree Oxide Fine Ceramics. *Alumina (Al 2 O 3 ) *Zirconia (ZrO 2 ) Qualities of superior strength at room temperature, corrosion resistance and electrical insulation. Much used for valve balls where chemical resistance and wear resistance is required. Qualities of high temperature melting point, good chemical stability and low thermal conductivity. This ball has a good mechanical function with super strength and super toughness.
Nylon Balls Nylon has characteristics of light weight, easily colourable; resistive to electricity, thermal conductivity, acid and alkaline. General application is for valves and flow meters. Material is polyamide resin (Nylon 66) The following table lists our standard manufacturing range, but additional sizes can be supplied to customer request. Nominal Size Nominal Diameter 1/8 3.17500 5/32 3.96875 3/16 4.76250 7/32 5.55625 1/4 6.35000 9/32 7.14375 5/16 7.93750 11/32 8.73125 3/8 9.52500 13/32 10.31875 1/2 12.70000 5/8 15.87500 3/4 19.05000 7/8 22.22500 1 25.40000
Brass Balls Copper alloy balls with good electrical and thermal conductivity characteristics. Applications are non magnetic bearings and valves. The following table lists our standard manufacturing range, but additional sizes can be supplied to customer request. Nominal Diameter Nominal Size 1/8 3.17500 5/32 3.96875 3/16 4.76250 1/4 6.35000 5/16 7.93750 3/8 9.52500 7/16 11.11250 1/2 12.70000 9/16 14.28750 5/8 15.87500 3/4 19.05000 7/8 22.22500 1 25.40000