AGMA 9002-A86 pdf free.Bores and Keyways for Flexible Couplings (Inch Series).
1.1 ApplicatIon Area. “Standard couplings are flexiWe couplings pre-engineered and consistent with the
Individual manufacturers published catalog data.”
This Standard is applicable to standard couplings as
defined In ACIMA Standard 310, “Nomenclature for
Flexible Couplings.”
1.2 £xclded Area. This Standard does not apply to couplings attached to shafts without keys.
2. StraIght Bored Hubs
2.1 St.ndard Bores. Standard finished bore sizes and tolerances are shown in Table 1. ICeyway tolerance is in accordance with 4.3.1, “Commercial.” For standard tolerances of finished straight bores over seven-inch diameter (Interference fit) see Table 2.
NOTE: A bore size n Iabk I may or may not be a stack bore size for ead couptmg manufacturer.
2.1.1 SbafI-w-H.b Fit. Shaft-to-hub fit is the responsibility of the purchaser.
2.1.2 Standard Shaft b-Hub Fits. This Standard covers Css I Clearance Fits, Class 2 Clearance Fits, and Interference Fits as shown in Table 1. The type of shaft-to-hub fit is dependent on the type of coupling and service In which the coupling will be used. If a particular type of fit is desired, it should be specified by the purchaser of the coupling.
2.1.2.1 Clearance Fits. Clearance flu are normally used to facilitate assembly and disassembly of coupling hub(s). Factors to be considered when using clearance fits include:
(I) Axial positioning of coupling hub(s) during operation
(2) When couplings are used for axial location of connected equipment (limited end float)
(3) The effect of hub-to-shaft clearance on coupling balance
(4) Fretting of shaft and hub bore
2.1.2.2 Interference Fits. Interference fits are normally used to maintain positive axial location of the hub(s) on the shaft(s) during operation, maintain axial location of connected equipment, preserve the inherent balance quality of the coupling, and prevent fretting of the shaft and bore. Nominal interference fit is 0.0005 in/In of diameter. Some applications may re• quite greater interference fit. Coupling purchaser shall advise the coupling manufacturer when heavier interference fit is used, because it can influence the coupling design.
2.1.3 Upecffled Heb-to-Shaft Ths. When the purchaser does not specify the hub-to-shaft fit required, the coupling manufacturer will bore the coupling to his standard tolerance in accordance with one of the fits given in Table 1. The purchaser is responsible for the resuking fit.
2.2 Nea-itandard Bores. Non-standard bores are produced to dimensions and tolerances specified by purchaser or manufacturer.
2.3 Set Screws. Set screws, when furnished for use with keys, will be in accordance with each coupling manufacturer’s standard, unless otherwise specified by the purchaser.
2.4 Bore Surface Finish. Machine finished bores will have a surface finish normally in the range of 63 to 125 microinches. For finishes better than 125 microinches, additional processes may be necessary.AGMA 9002 pdf download.