CARBÂ® toroidal roller bearings â a revolutionary ... - Acorn Bearings

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1 Product information 2 Recommendations 3 Product data Page ............. 3 Associated components Page ............. 37 Design of adjacent components Space on the sides of the bearing To enable axial displacement of the shaft relative to the housing, space must be provided on both sides of the bearing as indicated in fig 13 . The actual value for the width of this space can be estimated based on It is particularly important when designing large bearing arrangements to take steps so that the mounting and dismounting of the bearings are facilitated or actually made possible. C a Fig 13 • the value C a (from the product tables), • the axial displacement of the bearing rings from the central position expected in operation, and • the displacement of the rings caused by misalignment Free space on both sides of the bearing Fig 14 C areq = C a + 0,5 (s + s mis ) or C areq = C a + 0,5 (s + k 1 B α) where C areq = width of space required on each side of the bearing, mm C a = minimum width of space required on each side of the bearing, mm (➔ product tables) s = thermal change in shaft length, mm s mis = axial displacement of roller complement caused by misalignment, mm k 1 = misalignment factor (➔ product tables) B = bearing width, mm (➔ product tables) α = angular misalignment, degrees See also under “Axial displacement” on page 40. Normally, the bearing rings are mounted so that they are not displaced with respect to each other. However, if considerable thermal changes in shaft length can be expected, the inner ring can be mounted offset relative to the outer ring up to the permissible axial displacement s 1 or s 2 in the direction opposite to the expected thermal elongation (➔ fig 14 ). In this way, the permissible axial displacement can be appreciably extended, an advantage which is made use of in the bearing arrangement of drying cylinders in papermaking machines. By mounting the outer ring purposely displaced with regard to the inner ring the permissible axial displacement can be extended CARB toroidal roller bearing on a tapered journal with oil duct and distributor groove CARB toroidal roller bearing arrangement with oil ducts and distributor grooves in the shaft and housing s 1 s 2 Fig Fig 15 16 18
1 Product information 2 Recommendations 3 Product data Page ............. 3 Associated components Page ............. 37 Threaded holes for the oil injection method If the oil injection method is to be used • for mounting and dismounting bearings on tapered journals (➔ fig 15 ) or • for dismounting bearings on or in cylindrical seatings on the shaft or in the housing it is necessary to provide oil ducts and distributor grooves in the seating on the shaft or in the housing (➔ fig 16 ). The distance of the distributor groove from the side at which the bearing is to be mounted and/or dismounted should correspond to approximately a third of the bearing width. Recommended dimensions for the distributor grooves, the oil ducts and the appropriate threads for the connections are given in tables 4 and 5 . 2 Recommended dimensions for oil ducts and distributor grooves Threaded connection holes Table 4 Table 5 L L 3 Gc G a N 60° Gb c h a r a b a N a N a G a G Gb Design A Design B Bearing seating Dimensions diameter b a h a r a N over incl. Thread G a Design G b Dimensions 1) G c N a max mm mm – – mm 100 3 0,5 2,5 2,5 100 150 4 0,8 3 3 150 200 4 0,8 3 3 200 250 5 1 4 4 250 300 5 1 4 4 300 400 6 1,25 4,5 5 400 500 7 1,5 5 5 500 650 8 1,5 6 6 650 800 10 2 7 7 M 6 A 10 8 3 G 1/8 A 12 10 3 G 1/4 A 15 12 5 G 3/8 B 15 12 8 G 1/2 B 18 14 8 G 3/4 B 20 16 8 800 1 000 12 2,5 8 8 1) Effective threaded length 19
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Creating a new “cold remedy” In
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CARBÂ® toroidal roller bearings â a revolutionary ... - Acorn Bearings

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CARBÂ® toroidal roller bearings â a revolutionary ... - Acorn Bearings