AGMA 915-3-A99 pdf free.Inspection Practices – Gear Blanks, Shaft Center Distance and Parallelism.
This information sheet provides recommended values for dimensional deviations on blanks, center distance and paraiislisni of axes of gears.
Numerical values g,vr ire this document are not to be regarded as strict ISO and AGMA quality cfltena. but may serve as a guide for mutual agreements, for ferrous components.
2 References
The following standards contain provisions which are referenced m the text of this AGMA information sheet. At the time of publication, the editions indicated were valid AJI standards are subiect to revision, and parties to agreements based on this document are encouraged to investigate the possabdhty of applying the most recent editions of the standards lndtcated
ISO 53:1998, C)4Endr gears for general and heaey engffesnng – Basic rack.
ISO 286-1:1988, ISO systsm of NrrUts and fits -Part 1: Bases of fodrances, deviations and fits,
ISO 1101:1983, Technical drawings – GeomeThcai tolerancnig – ToJeranang of form onentsn,
docation and run-out – Generalities, dehnEtions, symbols,indatáons on drawings.
ISO 1328-1:1995, Cylinckical gears – ISO System of accuracy – Delnhtions and aIiowabe values of deviations relevant ID corresponding flanks of gear teeth.
ISO 1328-2:1996, Cylinckical gears – ISO System of accuracy – Dehnmons and a1owabe velues of deviations re4event to radial composite deviations and ninout rnialion.
3 Symbols and definitions
31 Symbols
Symbols used tor deviatona of individual e’iemerit measurements are composed of lower case letters, such as “f ” wh subscnpts, whereas symbols used for “toter deviations, wtiidi may represent combinelions of several in&vidual element deviations, are composed of capital letters, such as “F”, also witti subscripts, see tle 1.
3.2 Definitions
Functional mounting surtaces are the surtaces which are to be used to mount the gear.
The functional axis of the gear is the axis about which the gear rotates in service and is defined by the centers of the functional mounting surtaces. The functional axis is one which is only meaningful when a complete assembly is being considered.
The datum surtaces are those used to define the datum axis.
The datum axis of the gear is defined bythe centers of the datum surtaces. It is the axis to which the gear details, and in particular the pitch, profile, and helix tolerances are defined.
The manufacturing mounting surtaces are surfaces which are to be used to mount the gear during manufacture.
4 Accuracy of gear blanks
This clause is concermned with the selection and adequate specification of the datum axis, the datum surtaces which define it and other associated reference surfaces. Complete tolerancing of the functional surtaces of a part should be in accordance with ISO 1101.AGMA 915-3 pdf download.