Specification Tapped holes f. coupl Scope Allocation of the JED Numbers General...

Transcription

1 WABCO Specification Class: Engineering Guidelines Class No.:62 Tapped Holes for Couplings JED according to ISO Previous Edition Abbreviated Title Tapped holes f. coupl Scope Allocation of the JED Numbers General Tapped Holes and Male Fittings Tapped hole dimensions according to JED Male Fittings and Dimensions according to ISO Representation on Drawings Representation on the Outline Drawing, Document Code 605/ Representation on the Sectional Drawing, Document Code 606/652 and Component Drawing, Document Code 607/ Minimum Center Spacing of Tapped Holes Tightening Torques Maximum Permissible Tightening Torque for the Tapped Holes Maximum Permissible Tightening Torques for the Coupling... 7 Continuation page 2 to 7 Group Standards Responsible for the Contents TRI: 002 Approved by Doc. Code Rev. 408 A

2 JED-464 : Page 2 1 Scope This specification defines the dimensions of tapped holes and shows the representation of dimensioning in the Component, Blank and Outline Drawings. Tapped holes, as defined in this specification, with a conical sealing surface, of the metric series, used in pneumatic braking systems on road vehicles using compressed air at a pressure below 2 MPa (20 bar) are designed for couplings according to the system of the PARKER, RAUFOSS and ANOFLEX Companies. This specification corresponds to ISO :1998 The previous issue of this specification ( ) contained dimensions as defined by Renault. The difference between the two versions consists in the increased length of the 10 countersinking, e.g. 2,4 mm instead of 2,0 mm for dimension M22 x 1, Allocation of the JED Numbers In old documents (approx to 2002), the standard JED-464 is indicated. In these cases, manufacture may also be made in accordance with the JED which is newly defined in the present document. In all documents to be newly created or revised, JED has to be indicated in order to clearly show the relation with the current version of the company standard. 2 General The dimensions apply to machining. The tapped holes made in accordance with the present specification are also suited for pipe couplings with flat gaskets or WABCO thrust ring and O-ring, provided that the male fitting has the profile defined in ISO : issue 1998, ISO : issue or DIN Form A: issue

3 JED-464 : Page 3 3 Tapped Holes and Male Fittings 3.1 Tapped hole dimensions according to JED D 2 ISO 965-6H D 3 + 0,4 0,1 D 4 D 5 1) 2) min. D 6 Min. l 1 min. l l 2 1) max. l 3 +0,4 M10 x 1 10, , ,5 1 1,6 M12 x 1, ,5 11,5 14 M14 x 1, ,5 11,5 14 1,5 2,4 M16 x 1, , ,5 M22 x 1, ,5 15, ) Maximum recommended depth of the centering face to allow sufficient engagement of the wrench to ensure appropriate tightness of fittings and lock-nuts. D 2 - medium as defined in ISO 965-1, i.e., tolerance quality 6H. If a deviating tolerance is required for machining, the indication has to be e.g. M22 x 1,5-6e / JED D 7 has to be selected in accordance with the desired nominal width. In the lower third (no O-ring contact!) of the O-ring sealing surface, tooling marks are acceptable.

4 JED-464 : Page Male Fittings and Dimensions according to ISO D 2 ISO g min. max. D 6 D 1 l 4 l 5 l 6 0 0,1 min. + 0, ,4 O-ring 1) (Inner diameter x cross-sectional diameter) M10 x 1 13,2 19,6 8,55 1,5 1,5 8 8 x 1,25 M12 x 1, ,9 9,85 9,4 x 2,1 M14 x 1, ,9 11,85 2 2, ,4 x 2,1 M16 x 1, ,3 13,85 13,4 x 1,9 M22 x1, ,1 19,85 2,5 19 x 2 1) Unless otherwise specified, O-rings shall have a minimum hardness of 70 IRHD, e. g. JED-7080M0

5 JED-464 : Page 5 4 Representation on Drawings The representations of holes in the documents have to show the finished condition which is stored as UDF (User Defined Feature) in the Pro/E (3D-CAD) repetition part database. The arrangement of the designation of thread on the projection line may be chosen, but the allocation has to be clear. 4.1 Representation on the Outline Drawing, Document Code 605/653 On customers request, tapped holes shall be indicated in the Outline Drawing only with their nominal diameter and reference to JED-464-0, e. g. M22x1,5 / JED The arrangement of these indications in a table including additional data may be useful.

6 JED-464 : Page Representation on the Sectional Drawing, Document Code 606/652 and Component Drawing, Document Code 607/651 On request of the Orderfulfilment Process, tapped holes shall be represented in the Sectional Drawing and Component Drawing only with the indication of the contour, nominal diameter and reference to JED-464-0, e. g. M22 x 1,5 / JED-464-0

7 JED-464 : Page 7 5 Minimum Center Spacing of Tapped Holes The indications of minimum center spacing L refer to straight male stud couplings and double-end flat flare nut wrenches according to DIN D 1 Hole Spacing L Usual widths Recommended sizes Minimum sizes across flats M10 x M12 x 1, M14 x 1, M16 x 1, M22 x 1, Tightening Torques 6.1 Maximum Permissible Tightening Torque for the Tapped Holes On the Outline Drawings, the maximum permissible tightening torque of the tapped holes (without fittings) applies as defined in JED-366. Deviating values (which might, for instance, be due to lower material strength of the body, e.g. plastic material) have to be indicated. 6.2 Maximum Permissible Tightening Torques for the Coupling On the Outline Drawings and Sectional Drawings, the tightening torque and the tolerance have to be indicated at all tapped holes shown with the fitting. The indications, maintenance and assembly instructions of the individual fitting manufacturers have to be observed.