safety factor of 6 relative to the housing rupture load.When determining the permissible static load, safety factors must be applied: ![]() ![]() A precondition for supporting loads is that the housing base surface is completely and rigidly supported. The guide values only apply if the flatness of the mounting surface in accordance with DIN EN ISO 1101 corresponds to the tolerance grade IT8 in accordance with DIN EN ISO 286-1 (measured across the diagonal). For spheroidal graphite cast iron (suffix D) a factor of 1,6 should be applied. The guide values for housing rupture load are valid for the standard housing material flake graphite cast iron (suffix L). The guide values are valid for purely static loading. Guide values are given for the rupture load of plummer block housings SNV and the maximum load carrying capacity of connecting screws for the upper and lower housing sections ➤ Figure and ➤ Table. Locating rings must be ordered separately. The bearing is thus seated in the centre of the housing. Locating bearing arrangements can be achieved by the insertion of one locating ring FRM on each side of the bearing outer ring. The bearing seats in the housing are machined such that the bearings are movable in the housing and can thus function as non-locating bearings. Locating bearing arrangement by means of locating rings It is recommended that only volatile solvents and lint-free cloths should be used. Inner and outer surfaces machined by chip-forming methods are provided with anti-corrosion protection that can be easily removed. The coating can be finished using all synthetic resin, polyurethane, acrylic, epoxy resin, chlorinated rubber, nitrocellulose and acid-hardening hammer tone finishes. By agreement, housing bodies made from spheroidal graphite cast iron EN-GJS-400-15 in accordance with DIN EN 1563 (suffix D) are available.Īll outer surfaces not machined by chip-forming methods have a universal paint coating (colour RAL 7031, blue grey). The standard material for the housing bodies is flake graphite cast iron EN‑GJL-HB215 in accordance with DIN EN 1561 (suffix L). ![]() The range of split spherical roller bearings is described in detail in a separate publication TPI 250. In order to ensure selection of the correct combination of housing and bearing when using split bearings, please contact Schaeffler. This gives a considerable reduction in the work associated with bearing replacement in numerous applications. Unsplit spherical roller bearings with an adapter sleeve can be replaced by split spherical roller bearings. The range of shaft diameters is 20 mm to 160 mm and 3/4 inch to 5 1/2 inch. Split plummer block housings SNV are intended for fitting with spherical roller bearings, toroidal roller bearings, self-aligning ball bearings and barrel roller bearings with a tapered or cylindrical bore as well as deep groove ball bearings ➤ Table. Shaft diameters from 20 mm to 160 mm and from 3/4 inch to 5 1/2 inch The spacings between the shaft and housing body are compensated by means of appropriately matched seals. This gives different shaft diameters for the same bearing size. Each housing can be fitted with rolling bearings of various diameter and width series if they have the correct outside diameter for the housing.ĭepending on their design, the bearings can be located either directly on the shaft or by means of an adapter sleeve. The housings are designed in accordance with a modular concept. The decisive factor is the outside diameter of the bearing Housings SNV052 to SNV200 are supplied without an eye bolt, housings SNV215 to SNV340 are supplied with an eye bolt Applications include agricultural machinery, the paper processing industry, mining, materials processing, the steel industry and power stations. Split plummer block housings SNV and the associated bearings form bearing arrangement units that can be matched, through the appropriate selection of accessories, to a wide range of applications ➤ Figure. T = permissible long term temperature of seal Seals for split plummer block housings SNV ![]() can be combined with an extensive range of seals covering a wide range of requirements and temperatures ➤ Figure and ➤ section.are suitable for different bearing types and sizes with bore diameters from 20 mm to 160 mm ➤ section.are designed in accordance with a modular concept and are highly versatile in application ➤ section.
0 Comments
Leave a Reply. |