Ganter Norm Standard Parts - Catalogue Page 2134
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Computing the Strength of Indexing Plungers / Cam Action Plungers continued Flexure loads As soon as a gap I remains between the guide and the indexing bore hole opposite, the load can be reduced to a flexure rod clamped in at one side. With this approach, the computation is made against the bending of the indexing plunger as a case of failure. Formulas for computation Resistance torque W = π x d³ 32 Bending stress Bending strength Mb = σb x W F = Mb l = σb x π x d³ l x 32 Material characteristics The yield or substitute yield limit (Re / Rp 0,2) shown in the table opposite has been determine in tension tests involving tension specimen in accordance with DIN 50125B6-30. These tests constitute the basis for the load bearing details given herein. Material Re Description Material no. in N/mm²(≈ per. flexural tension σb) C45Pb 1.0504 560 X 10 CrNiS 18 9 AISI 303 580 Computing examples, load values Example: Indexing plungers with a bolt diameter of 5 mm made of steel with a yield limit of Re = 560 N/mm², computation against permanent deformation, the maximum permissible flexural strength is wanted: Fper = 560 N/mm² x π x (5mm)³ = 3430 N 2mm x 32 d Bolt diameter 3 4 5 6 8 10 12 16 Max. flexural strength F in N, acc. to material and gap l differentiated C45Pb / 1.0504 X 10 CrNiS 18 9 / 1.4305 l = 2 mm l = 3 mm l = 2 mm l = 3 mm 740 1750 3430 5930 14070 27480 47490 112590 490 1170 2290 3950 9380 18320 31660 75063 760 1820 3550 6140 14570 28470 49190 116610 510 1210 2370 4100 9710 18980 32790 77740 Safety information On principle, the design also needs an adequate safety coefficient to be taken into account. The usual safety coefficients under static load 1,2 to 1,5; pulsating 1,8 to 2,4 and alternating 3 to 4. Disclaimer: Our information and recommendations are given with non-binding effect and ruling out any liability, unless we have expressly committed ourselves in writing to provide information and recommendations. All products are standard elements for versatile uses and as such are subject to extensive standard tests. You should carry out your own test series to verify whether a certain product is suitable for your specific applications. We cannot be held responsible for this. Information for Loads | Page 2133
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