DIN – Download as PDF File .pdf), Text File .txt) or read online. DIN Involute splines based on reference diameters – Part Inspection . standard by Deutsches Institut Fur Normung E.V. (German. Buy DIN INVOLUTE SPLINES BASED ON REFERENCE DIAMETERS – PART INSPECTION from SAI Global.
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March DIN Splined connections with involute splines based on reference diameters — 580-15 1: Principles Passverzahnungen mit Evolventenflanken und Bezugsdurchmesser — Teil 1: Grundlagen Supersedes DIN Uncontrolled copy when printed.
Bottom clearance of flank-centred connections Example of a data field in a drawing Preferred series, reference diameters dB from 6 mm to 58 mm Preferred series, reference diameters dB from 60 mm to mm Recommended tolerances and deviations for tip and root circle diameters Calculation of tolerance limits Guide values ein radial runout DIN Validity This standard is valid from onwards.
Involute splines in accordance with ISO are based on series of modules. These are not interchangeable with involute splines as described by the DIN series of standards. The DIN series of standards is based on reference diameters that are independent of the module. This makes it possible to adapt the gears to standardized ball and roller bearing diameters and to reduce the number of different tools required sin manufacturing.
This series of standards has been dn by Technical Committee 2. The revision was considered necessary since a review of the DIN series of standards in accordance with DIN had shown that the series had structural and editorial weaknesses. The object of the revision was to combine the individual parts of this standard in a practical, useful and sensible manner.
The entire series of standards now consists of only four parts instead of the previous sixteen. DIN Splined connections with involute splines based on reference diameters now comprises: Tools The new edition of DIN deals with fundamental principles, the same as its predecessor, but now also includes fit dimensions and tolerances, these being formerly contained in DIN The calculation formulae, tolerances and deviations contained in Part 1 also apply to the other parts of this series of standards.
DIN now contains the nominal dimensions and inspection dimensions for the range of items stated above. DIN covers quality inspections of fitted splined connections. DIN defines the design features of tools for manufacturing items with involute splines.
Amendments This standard differs from the DIN It lays downthe following fundamental principles: For datedreferences, only the edition referred to applies to this standard. For undated references, the latest edition including all amendments of the publication referred to applies.
DINPreferred numbers and series of preferred numbers; basic values,calculated values, rounded valuesDINSeries of modules for gears; modules for spur gearsDINDefinitions, parameters and equations for 54800-15 cylindrical gears and gear pairsDINSplined connections with involute splines based on reference diameters — nominal dimensions and inspection dimensionsDINSplined connections with involute splines based on reference diameters — quality inspectionDINSplined connections with involute splines based on reference diameters — toolsDIN ISOTechnical drawings — representation of splines and serrations 5Uncontrolled copy when printed.
The selection of nominal dimensions is essentially determinedby the following condition: In connections centred on any reference diameter, this condition is met by making the referencediameter equal to the bore of the bearing and then modifying the profiles of the teeth of the hub and the shaftaccordingly.
Even numbers of teeth have been given preference in tables 1 and 2. The reasons for this are explained insubclause 7. Figure1 shows an externally-centred shaft with splines. DIN Figure 1: Double teethIf the number of spaces which can measured using pins is an odd number, then the measurements given inthe tables can be converted.
The symbol z then represents thenew odd number of spaces. A number of teeth expressed as 6 12 indicates six double teeth out of a total of DIN Table 1: DIN Table 2: DIN Basic rack profileFigure 2 shows the basic rack profile. The corresponding descriptive parameters, tooth interlock data andcalculation formulae are given in table 3.
Key1 shaft2 hub3 profile reference line Figure 2: Basic rack profile 12Uncontrolled copy when printed. DIN Table 3: DIN for all calculations in respect of fitted splined connections.
These lead to negative signs for all hub diametersand dimensions see DIN In the tables of dimensions given in DINonly the absolute values ofdiameters and inspection dimensions are listed, i. The flanks of the teeth are used both for transmitting the torque and for centring the hub and shaft relative to one another.
This standard can also be applied, however, to design diameter-centred connections. The diameters of the tip and root circles of the shaft differ from the respective diameters of the hub by at least the bottom clearance c see figure 3.
The fit and the centring accuracy are determined by the deviations of the space widths and thicknesses as well as by the tolerances achieved or specified.
For limits of centring accuracy, see DIN The property defining the fit is the fit of the flanks, the backlash. Refer to clause 10 for the dn between space width tolerance and tooth thickness tolerance, measurement 580-15, spline mesh quality and backlash. These determine the design dimension of the connection diameters where the chip-cutting manufacturing method is not yet known and the tool run-out spaces are free. The machining-method-dependent root circle diameters of shafts created by 14Uncontrolled copy when printed.
They determine the design value of the connection diameter. Refer to table 5 for recommended tolerance fields and ddin of the root circle and tipcircle diameters. The exact root circle diameters of hubs and shafts with splines created by rolling are calculated using theformulae given in DINtaking into account the particular features of the respective rolling method, thedeviations of the space widths and tooth thicknesses and, where necessary, a machining addition.
DIN also contains formulae for calculating the exact root circle diameters of shafts with cold-rolled splines. Bottom clearance of flank-centred connections7.
The teeth merely serve to transmit the forces. Such connections mustalways be given enough backlash in order to prevent over-determination of the centring see figures 4 and 5. The fit and accuracy of concentricity are determined by the selected ISO tolerance fields of the centringdiameters.
The nominal dimensions of the centring diameters of diameter-centred connections are the referencediameters for external diameter centring or of the hub tip circle diameters for internal diameter centring.
In the case of numbers of teeth which are not prime numbers, idn centring surfaces can be widened bymultiple teeth on the shaft and multiple spaces in the hub, for instance in order to make diameter-centredconnections stronger or to allow diameter centring with small modules see figure 1. Diameter-centred connections necessitate greater 548015 effort due to the small tolerances of thecentring diameters and the measures required to limit the offsets between the centring diameter centre andthe centre of the tooth circle.
These should therefore only be used in a few exceptional cases. See table 5 for recommended tolerance fields of the root circle and tip circle diameters. Refer to table 5 for recommended tolerance fields of the root circle and tip circle diameters. External diameter centring 7. Internal diameter centring 16Uncontrolled copy when printed.
DIN Table 5: DINan N for a hub or W for a shaft, followed dkn an A for externally-centred connections or an I forinternally-centred connections only in the case of diameter-centred connectionsthen by the module, thenumber of teeth, the tolerance class and the deviation series. 5480-155 diameter-centring, the tolerance class andthe deviation series are placed in front of the respective data of the tooth flanks.
DIN Data to be shown on drawings9. It istherefore recommended that these be indicated in the form of a data field, see figure 6. Example of a data field in a drawingIf the method of measurement has to be specified, it is also possible to state a measuring ball or measuringpin diameter instead of the measuring circle diameter.
The dimension over or between measuring circles isthen stated either as the dimension over or between balls or pins, accordingly.
Involute Spline DIn – Help!!! – Gear & Pulley engineering – Eng-Tips
The designations given inDIN for gear teeth are also permitted. However, in thiscase a note must be added stating that the GO gauge has priority. This means that the respective workpiecesmay not be rejected because of individual deviations. If very many measurements are taken in different angular positions and measuring planes, it may be useful to apply statistical concepts when evaluating the actual tolerance limit.
This avoids excessive reject rates, which would not occur if fewer measurements were to be taken. The statistical actual tolerance limit permits a certain number of measurements to exceed the tolerance limits by a specific value.
For details, see DIN5. Where necessary, the data for the statistical actual tolerance limit STA are entered at the bottom of the data field of the fitted splined connection. The difference between the space width and the tooth thicknessdetermines the rotational backlash.
For space widths of hubs and tooth thicknesses of shafts, this standardprovides deviation series and tolerances based on the nominal dimensions, see figure 7.
The deviation seriespermits the definition of free fits, transitions fits and interference fits. The tolerance classes define themanufacturing tolerances.
A designfit clearance of zero ensures that the hub can be fitted on the shaft. For a minimum fit clearance of zero, it isbetter to set the effective tolerance limits to the dimension of the nominal space width e2 and the nominal tooththickness s1. The magnitudes of the deviations are identified by upper-case characters and 21Uncontrolled 540-15 when printed.
DIN can xin selected individually for hubs and shafts as shown in table 9. There are six deviations, from F to M for hubs and 18 deviations from v to a for shafts.