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Bangladesh Ordnance Factories (BOF) is the largest military–industrial complexof Bangladesh Army; situated in Gazipur which produces arms, ammunition, and equipment for the Bangladesh Military. Bangladesh Ordnance Factories Native name Bengali: বাংলাদেশ সমরাস্ত্র কারখানা Type State-owned enterpriseFounded1970; 47 years agoHeadquartersGazipur,  Dhaka Division,  Bangladesh Area served BangladeshProductsFirearms,  Artillery,  Fuses,  Detonators,  Explosives.OwnerBangladesh ArmyWebsitewww.bof.gov.bd The current Commandant of Bangladesh Ordnance Factories is Major General Hamidur Rahman Chowdhory, rcds, psc It currently operates the following factories.[3] Small Arms FactorySmall Arms Ammunition FactoryGrenade Manufacturing FactoryArtillery Ammunition FactoryTools Manufacturing Plant arb bearing dealers in Dhaka timken taper roller bearing dealers distributors in Dhaka Chittagong Bangladesh thk PMI hiwin rexroth schneeberger IMT linear guide ball Screw dealers in Bangladesh Chittagong DHAKA
Double row full complement cylindrical roller bearings The basic SKF assortment of double row full complement cylindrical roller bearings provided here includes NNCL (fig. 1), NNCF (fig. 2) and NNC (fig. 3) open design bearings, as well as sealed NNF design bearings (fig. 4). All bearings are non-separable and have an annular groove and three lubrication holes in the outer ring to facilitate lubrication. NNF design bearings have three additional lubrication holes in the inner ring. Single row full complement cylindrical roller bearings The basic SKF assortment of single row full complement cylindrical roller bearings provided here includes NCF and NJG design bearings. They are used to locate the shaft axially in one direction and eventually to accommodate axial displacement of the shaft relative to the housing in the opposite direction. NCF design NCF design bearings have two integral flanges on the inner ring and one on the outer ring (fig. 1). A retaining ring inserted in the outer ring on the side opposite the integral flange holds the bearing together. The retaining ring should not be loaded axially during operation.  fig. 1 NJG design NJG design bearings, which comprise the heavy 23 dimension series, are intended for very heavily loaded, low-speed applications. These bearings have two integral flanges on the outer ring and one on the inner ring (fig. 2). NJG design bearings have a self-retaining roller complement. Therefore, the outer ring with the roller complement can be separated from the inner ring without having to take special precautions to prevent the rollers from falling out (fig. 3). This simplifies mounting and dismounting.  fig. 2  fig. 3 Matched bearings SKF can supply matched bearings. To match bearings, SKF combines bearings so that the difference in cross-section height lies within a very small tolerance range. This reduced tolerance range is a precondition for equal load sharing between the bearings. Matched bearings are identified by a designation suffix:DR for a set of two bearingsTR for a set of three bearingsQR for a set of four bearings Multi-row cylindrical roller bearings Four-row (fig 1) and six-row cylindrical roller bearings (fig 2) are used almost exclusively for the roll necks of rolling mill stands, calenders and roller presses. Their friction is low compared with other roller bearings. As they are normally mounted with an interference fit on the roll neck, they are particularly suitable for rolling mill applications where the rolling speed is high.  fig 1  fig 2 The low bearing cross section allows for relatively large roll neck diameters in comparison with the roll diameter. Since very many rollers can be incorporated, the radial load carrying capacity is exceptionally high. Multi-row cylindrical roller bearings are only able to accommodate radial loads. They are therefore mounted together with deep groove or angular contact ball bearings, or with tapered roller bearings, either radial or thrust designs, which take up the axial loads. The four-row and six-row cylindrical roller bearings are of separable design, i.e. the ring or rings with integral flanges and the roller and cage assemblies can be mounted independently of the free rings, or all bearing components can be mounted separately. This considerably simplifies bearing mounting, maintenance and inspection. A certain limited axial displacement of the shaft with respect to the housing can be accommodated within the bearing. SKF four-row cylindrical roller bearings have a cylindrical bore and some sizes are also available with tapered bore. Bearings with tapered bore can be adjusted during mounting to give a certain radial internal clearance or a defined preload.
What is the difference between B-type spherical roller bearings and E-type?  The B-type spherical roller bearing has asymmetric rollers guided by an inner ring center rib for better skewing control. E-type spherical roller bearing employs larger symmetric rollers for increased load capacity, fast becoming the industry standard. With the recent acquisition of SNR, NTN can provide more E-type spherical roller bearings than ever .Does NTN make sealed spherical roller bearings?  NTN makes a limited series of sealed spherical roller bearings, the WA22200 series, the MX-W22200, and various special part numbers. Please contact NTN engineering for more details
What is the designation for sets (pairs) on your angular contact bearings?  Paired arrangements for angular contact bearings are designated as “D2” (universal flush ground pair), “DB” (matched back-to-back pair), “DF” (matched face-to-face pair) and “DT” (matched tandem pair). What is back-to-back and face-to-face in angular contact bearings?  Back-to-back (DB) or face-to-face (DF) are duplex arrangements of angular contact bearings (can also refer to taper bearings). Radial loads and axial loads in either direction can be accommodated by these arrangements. DB arrangements have a large spread between the bearing centers and should be selected when a rigid shaft is required for the application. DF arrangements have a very short spread between centers and should be applied when slight shaft misalignment is needed. The DB arrangement requires the inner rings to be clamped whereas the DF arrangement requires the outer rings to be clamped. What is the difference between angular contact bearings and deep groove ball bearings?  Deep groove ball bearings are a non-separable type bearing with the line connecting contact points of the inner ring, steel ball, and outer ring of 0º in the radial direction. They are designed to take mainly radial loads but can handle some axial load in either direction. Angular contact bearings are also a non-separable type. The line connecting contact points of the inner ring, steel ball, and outer ring creates an angle with the line drawn in the radial direction called the contact angle. Angular contact bearings can accommodate relatively heavy axial loads in one direction in addition to radial loads. The larger the contact angle, the larger the axial loading capacity becomes.
SKF Explorer deep groove ball bearings are designed to run cooler, smoother, quieter and longer than standard design deep groove ball bearings. These bearings provide outstanding performance and service life. The SKF Explorer deep groove ball bearing is the result of our ongoing commitment to continuous improvement of the performance of our products through our technology development process. The performance of these bearings has been substantially improved by optimizing the in- ternal geometry and surface finish of all contact surfaces, redesigning the cage, combining the extremely clean and homogenous steel with a unique heat treatment and improving the quality and uniformity of the balls. Because deep groove ball bearings are the most widely used bearing type, they are available from SKF in many designs, variants and sizes. SKF produces each SKF Explorer deep groove ball bearing to the same specifications, regardless of where it is produced. SKF’s standardized pro- cesses provide one level of quality, making SKF Explorer deep groove ball bearings an excellent solution for many applications. SKF BEARING dealers in Kolkata Chennai Delhi Mumbai
Cylindrical roller bearings  SKF cylindrical roller bearings are available in many designs, series and sizes. The majority are single row bearings with a cage. High-capacity bearings, double row bearings, multi-row bearings, single and double row full complement bearings (without a cage) and split bearings complete the SKF standard assortment provided here. Bearings with a cage can accommodate heavy radial loads, rapid accelerations and high speeds. Full complement bearings incorporate a maximum number of rollers and are therefore suitable for very heavy radial loads at moderate speeds. SKF high-capacity cylindrical roller bearings combine the high load carrying capacity of a full complement bearing with the high speed capability of a bearing with a cage. The factors that influence SKF cylindrical roller bearing performance and service life include but are not limited to the following: Roller end / flange contact area Logarithmic roller profile Surface finish Interchangeable components Assortment The SKF assortment of standard cylindrical roller bearings comprises:single row cylindrical roller bearings, mainly of the NU, N, NJ and NUP designs (fig. 5,  fig. 6,  fig. 7,  fig. 8)high-capacity cylindrical roller bearings, NCF (fig. 9), NJF and NUH design  double row cylindrical roller bearings, NNU (fig. 10), NN (fig. 11) and NNUP designsmulti-row cylindrical roller bearings (fig. 12,  fig. 13)single row full complement cylindrical roller bearings, NCF (fig. 14) and NJG designs (fig. 15)double row full complement cylindrical roller bearings, NNCL (fig. 16), NNCF, NNC and NNF designs (fig. 17)split cylindrical roller bearings (fig. 18,  fig. 19) SKF BEARING DEALERS IN KOLKATA SKF BEARING DEALERS IN ROURKELA SKF BEARING DEALERS IN JHARKHAND SKF BEARING DEALERS IN JHARSUGDA SKF BEARING DEALERS IN ANGUL SKF BEARING DEALERS IN SAMBALPUR SKF BEARING DEALERS IN BHUBANESWAR SKF BEARING DEALERS IN BARBIL SKF BEARING DEALERS IN CUTTACK SKF BEARING DEALERS IN BANGLADESH SKF BEARING DEALERS IN DHAKA SKF BEARING DEALERS IN DURGAPUR SKF BEARING DEALERS IN HALDIA SKF BEARING DEALERS IN DANKUNI SKF BEARING DEALERS IN WEST BENGAL
 Contamination is a leading cause of bearing failure.  Heavy industrial applications are susceptible to even higher levels of contamination compared to others.  In order to combat against contamination and improve bearing performance, NSK applied AIP to suggest product changes that resulted in over $200, 000 in savings. A hammer mill application was using a competitor’s SAF pillow block and bearing that was failing after only 4 months of operation.  Upon inspection, NSK determined that debris had entered the block.  Excessive change-outs were causing significant financial strain in lost production and maintenance cost. NSK proposed changing from a standard labyrinth LER seal to a NSK Spherical Roller Bearing inside a SAF Pillow Block (SAF22538) with Taconite Seal TER155OS.  TER-OS Taconite Seal   The TER-OS taconite seals are designed to prevent entry of contaminants in severe service conditions.  Each seal is equipped with a shaft contact spring-loaded oil seal, grease-charged channel, felt shaft seal and O-ring seal in the housing labyrinth to form an impenetrable barrier and provide a tight, yet flexible fit.  The use of this seal protected the spherical roller bearing within the SAF housing to achieve longer life.  The NSK solution provided over 2 years of service life compared to 4 months service lifefrom competitor’s product. Cost Savings Breakdown: Competitor Product Bearing Installation: 5 installs @ $2, 981  = $14, 905 Maintenance Cost: 40 hrs x 2 personnel @ $150 per hour = $12, 000 Lost Production: 500 tons @ $90/ton x 5 failures = $225, 000 Total:  $251, 905 NSK Solution Bearing Installation: 1 install @ $2, 981  = $2, 981 Maintenance Cost: 8 hours x 2 personnel @ 150 per hour  = $2, 400 Lost Production: 500 tons @ $90/ton x 1 install  = $45, 000 Total:   $50, 381 Total Cost Savings:  $201, 524
Since it first supplied ball bearings to the Japanese market in 1916, NSK has broadened its range and contributed to all different fields of industry. In particular, the company focused on and moved into the automotive products arena at an early stage. Placing an emphasis on performance and product quality, the company's business developed in tandem with the automobile industry. Even now NSK is without rivals, supporting automobiles in their three crucial functions: “Running, Turning and Stopping”, thanks to its broad product range. NSK automotive products are now a globally respected brand. Naturally the company supplies a wide variety of bearings, as well as automatic transmission parts and steering column, joints. Further, it also makes the electric power steering system (EPS), which is ready for the 21st century steer-by-wire technology. NSK is always upgrading its Motion & Control technologies based on developments in the company's proprietary tribology technologies (relating to friction, wear and lubrication) and mechatronics technologies that have been built up as a result of the company's rolling bearings business. In this way NSK is able to quickly respond to the needs of its customers around the world. Various NSK products that are incorporated into automobiles have functionality and performance characteristics that control friction and reduce energy loss. We can say that they themselves are environmentally friendly products that contribute to reduced energy and resource requirements. Through its new technology, NSK will continue to supply automotive products that are kind to the global environment and that add to vehicle safety and comfort. NSK Experience & Technology  Over 100 bearings are used in a single vehicle, and NSK ensures that its bearings offer safety and comfort, and are environmentally responsible. NSK hub unit bearings are compact, lightweight, highly durable and of very high quality. Engine-related parts and bearings need to accommodate evolving engine designs, and NSK supplies water pump bearings and bearings for tensioners that make full use of advanced technologies. There are a wide variety of transmission bearings that are smooth and offer low power loss, facilitating smooth gear shifting. In particular, the “Half Toroidal CVT POWERTOROS Unit” is extremely smooth because it is a continuous gear ratio transmission, with supremely quiet gear changes. It consumes less energy and its high efficiency contributes to lower CO2 emissions. Based on a crystallization of NSK's advanced technology in tribology, the POWERTOROS Unit can be said to be the dream CVT unit. NSK also offers a broad range of other attractive products.
   1962 FAG India incorporated as Precision Bearings India Limited (in collaboration with Norma Hoffmann Bearings Corporation, USA) in 1962. The foundation stone of the building was laid in April in 1963.   1964 Commencement of manufacturing operations. Bearings marketed under brand Name ‘NORMA’.    1968 FAG Germany acquired the stake of Norma Hoffmann thus FAG India became a part of the FAG group.    1975 First Expansion & launch of Spherical Roller Bearings Project for Indian Railways.    1986 The company name changed to FAG Precision Bearings Limited.    1989 Company celebrated its Silver Jubilee Year.    1992 Change in brand name from NORMA to FAG    1993 Became first Indian Bearing company to achieve ISO 9001 certification.    1997 100% Export Oriented (EOU) Project for Cylindrical roller bearings inaugurated    1998 Became first Indian Bearing company to achieve QS 9000 certification.    1998 EOU Plant capacity expanded.    1999 Change in company name to FAG Bearings India Limited.    1999 The company achieved ISO 14001 certification.
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