Slide bearings - Wolf Kunststoff-Gleitlager GmbH

CCCCCC4. Design guidelines4.1. Attaching the bushings to insert intothe casing4.1.1. Inserting the bushingsIn general, the slide bearing bushes are fixed by simplystuffing them into the casing hole (economical way ofattachment).4.1.2. Interference of bushingsAttaching the bushingsIncrease of the installation bearing clearance Sv bythe use of an adapter hole of an ISO-tolerance ofH6[µm]H7[µm]H8[µm]Casing inside diameter up to 3mm 2 6 10 21Casing inside diameter exceeding 3mm - 6mm 3 7 13 25Casing inside diameter exceeding 6mm -10mm 3 9 16 30Casing inside diameter exceeding 10mm - 18mm 3 10 19 35Casing inside diameter exceeding 18mm - 30mm 4 12 24 34Casing inside diameter exceeding 30mm - 50mm 5 14 28 51Casing inside diameter exceeding 50mm - 80mm 6 17 33 61Casing inside diameter exceeding 80mm - 120mm 7 20 39 72Casing inside diameter exceeding 120mm - 180mm 7 22 45 82Casing inside diameter exceeding 180mm - 250mm 9 26 52 95H9[µm]Casing inside diameter exceeding 250mm - 315mm 9 29 58 107PrefaceContentsMaterialoverviewDue to the fact, that plastic alloys taken from the ZEDEXseriesshow a lower elastic modulus than metallicmaterials, the stuffing interference of the bushings outsidediameter has to be chosen bigger than that of similarmetal slide bearings.outside diameter ød 2v(mm)interference/-oversizemin.(mm)interference/-oversizemax.(mm)exceeding 6 - 10 0,05 0,08exceeding 10 - 20 0,08 0,12exceeding 20 - 50 0,10 0,15exceeding 50 - 100 0,15 0,20exceeding 100 - 150 0,20 0,28exceeding 150 - 230 0,25 0,35exceeding 230 - 300 0,3 0,4Table 3: Stuffing interferences4.1.3. Adapter hole4.1.3.1. Standard adapter holeAll slide bearing bushes are designed for a stuffing fitused for an adaptor hole with an sufficient wall thicknessas well as of an ISO-tolerance of H5. All bushings areavailable with the necessary interferences/oversizes listedin table 3 (conditions of installation).4.1.3.2. Special adapter holesPrincipally the use of an adaptor hole of a quality deviantfrom 5 is possible (eg. H6 or H7). In these cases, onlythe holes upper dimensional deviation ød1 of the bushingsincreases after insertion.Please take all further information concerning the increaseof the installation bearing clearance caused by the useof an ISO-tolerance deviant from H5 out of table 4.Table 4: Increase of the installation bearing clearanced1 = Sv + ød1 H5max[2]in which:d1 H5Svød1max =ISOtoleranceofthe adapterhole= upper dimensional deviation of the slidebearing bush by using a casing of an ISOtolerance[mm] deviant from H5= increase of the installation bearingclearance [mm] taken from table 4upper dimensional deviation of the slidebearing inserted into a casing of an ISOtoleranceof H5 taken from dimensionslists granting an appropriate screwdiameter d [mm]upperdimensionaldeviation(ø 30mm)[µm]difference ofthe upperdimensionaldeviations[µm]upper dimensionaldeviation of thehole d1 afterinsertion takenfrom dimensionlist[µm]lower dimensionaldeviation of thehole d1 afterinsertion[µm]H5 9 0 98 65H6 13 4 98+4 =102 65H7 21 12 98+12=110 65H8 33 24 98+24=122 65H9 52 43 98+43=141 65Example for a bushing of a diameter d1= 30mmIndex Slide bearings Slide bearings Conditions ofTribologyMathematical Design(with collar) (cylindrical) installationexample guidelinesWolf Kunststoff-Gleitlager GmbH • Heisenbergstr. 63 - 65 • 50169 Kerpen-Türnich • Tel. 02237/9749-0 • Fax. 02237/9749-2012