DIN 5481 花键标准

DIN 5481 Jun 2005

1. Socpe

This standard applies to splines with serrated flanks (serrations) and external ser

a constant space angle of 60, with 28 to 42 teeth and of nominal diameters ranging from 7m 60mm.

Serrations as in this standard are used for connecting hubs to shafts either with a

a removable connection, but which, due to the expected wear, is never a sliding fit connec As the teeth are relatively small, only small torque can be transmitted by such connection The following principles apply to serrations as in this standard:

a) Shafts have a uniform space angle

b) shafes may have curved flanks generated by machining with straight-flan

figure1)

c) Where hubs may have curved tooth flanks (to allow for machining by mean hobs), this is to be separately agreed upon by the manufacturer and customer.

d) The "rough" deciations for shafts apply in cased where the force only a direction (torsion bar spring).

e) Side fit

2. Normative references

This standard incorporates, by dated or undated reference, provisions from ot publications, There normative references are cited at the appropriate places in the test a publications are listed below. For dated references,subsequent amendments to or revisions of these publications apply to this European standard only incorporated in it by amendment revision, For undated references, the latest edition of the publication referred to (inclu amendments) applies.

E DIN 5480-2:2004-05,involute splines based on reference diameters--part2: No inspection dimensions.

DIN 3960:1987-03,Definitions,parameters and equations for involute cylindrica

ISO 4156-3:2002-02,Straight cylindrical involute splines-Metric module,side f

part3:inspection.

3. Stmbols, designations and units

αsee DIN 3960 4. Structure

5. Diameters 5.1 General

figure2

5.2 hub(shaft) diameters nominal dimension

maximum dimension D iimax minimum

dimension D iimin

mm -°mm mm mm mm mm 7X82847.1437.5 6.907.277.188.148X102817.1439.08.108.478.389.8310X123048.00011.010.1010.5010.3911.9012X143148.38713.012.0012.4012.2914.0715X173248.75016.014.9015.3015.1917.1417X203349.09118.517.3017.7017.5919.8421X243449.41222.020.8021.2321.1023.6326X303549.71428.026.5026.9326.8029.7530X343650.00032.030.5030.9730.8133.8436X403750.27038.036.0036.4736.3139.7240X443850.52642.040.0040.4740.3143.7845X503950.76947.545.0045.4845.3249.8450X554051.00052.550.0050.4850.3254.5855X60

42

51.429

57.555.0055.5355.34

59.74

5.3 shaft diameter

space angle γi pitch

dimension D tip diameter Dii tolerance A11root form

circle diameter D Fimin min Shaft serrations as in this standard have a constant space angle γe=60°, the space ang serrations on the corresponding hubs varies in relation to the number of teeth. The nomin

thickness is equal to half the pitch length on the specified pitch circle.The nominal diameters describe the rounded minor diameter of the hub and the majo

shaft, respectively,e.g.7x8, these diameters have tolerances All and a11, respecitively pitch diameter passed roughly through the center of the teeth, along this diameter,the thicknesss and the space width on andy one workingpiece are roughky equal. the form circ generated when the root diameter for the specified maximum radius is gemerated at a con

tooth thickness or space width(see figure2)

nominal

diameter

number

of teeth

Z

om other

places in the test and the nts to or revisions of any d in it by amendment or

n referred to (including

2: Nominal and

drical gears and

l serrations having ters ranging from 7mm to

ith a permanent or a sliding fit connection.

d by such connections.

-flanked hobs(see

means of involute stomer.

nly acts in one

ide fit-

mm mm 8.210.089.930.0812.010.1014.190.1017.320.1520.020.1523.800.1530.030.2534.180.3040.230.4544.340.5050.340.4555.250.6060.42

0.60

Root diameter Dei approx.root radius R imax max =60°, the space angle of of teeth. The nomina tooth d pitch circle.

major diameter of

a11, respecitively. The this diameter,the tooth equal. the form circle is gemerated at a constant