ANSI/AGMA 9002-B04 pdf free download.American National Standard – Bores and Keyways for Flexible Couplings (Inch Series).
ANSI/AGMA 9002 finished bore sizes and tolerances are shown in table 2. Keyway tolerances are in accordance with clause 7. For standard tolerances of finished straight bores over eighteen inch diameter, see table 3.
NOTE: A bore size in table 2 may or may not be a stock bore size for each coupling manufacturer.
4.1.1 Standard shaft-to-hub fits
This standard covers Class 1 Clearance Fits, Class 2 Clearance Fits, and Interference Fits as shown in table 2. The type of shaft-to-hub fit selected is dependent on the type of coupling and service in which the coupling will be used. If a particulartype of fit is desired, it shall be specified by the purchaser of the coupling.
4.1.1.1 Clearance fits
Clearance fits are normally used to facilitate assembly and disassembly of coupling hub(s). Factors to be considered when using clearance fits include:
— axial positioning of coupling hub(s) during operation;
– when couplings are used for axial location of connected equipment (limited end float);
– the effect of hub-to-shaft clearance on coupling balance;
– fretting of shaft and hub bore.
4.1.1.2 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;
– minimize fretting of the shaft and bore.
Nominal interference fit is 0.0005 inch/inch of shaft diameter. Some applications may require greater interference fit. The coupling purchaser shall advise the coupling manufacturer when a heavier interference fit is required. Heavier fits can influence the coupling design and materials selected.
4.1.2 Unspecified hub-to-shaft fits
When the purchaser does not specify the hub-toshaft fit required, the coupling manufacturer will bore the coupling to their standard tolerance in accordance with one of the fits given in table 2. The purchaser is responsible for the resulting fit.
4.2 Non-standard bores
Non-standard bores are produced to dimensions and tolerances which are outside this standard.
5 Tapered bore hubs
5.1 Typical tapered bores
The standard tapers are:
1) 2.0 degrees included angle (1 degree per side);
2) 0.50 inch per foot of length on diameter (1 to 24 rate of taper):
3) 0.75 inch per foot of length on diameter (1 to 16 rate of taper);
4) 1.25 inch per foot of length on diameter (1 to 9.6 rate of taper);
5) 1.50 inch per foot of length on diameter (1 to 8 rate of taper).
5.2 Keyways
Keyways for tapered bore hubs may be parallel to the taper or parallel to the bore centerline. The preferred practice is to specify that the keyway is machined parallel to the bore centerline.
5.3 Tapered bore dimensional control requirements
Three dimensions are required to control the form and size of a conical surface.ANSI/AGMA 9002 pdf free download.