MS16629E
NOTES:
1. UNLESS OTHERWISE SPECIFIED, DIMENSIONS ARE IN INCHES.
2. IN THE EVENT OF A CONFLICT BETWEEN THE TEXT OF THIS STANDARD AND THE REFERENCES CITED HEREIN, THE TEXT OF THIS STANDARD SHALL TAKE PRECEDENCE.
3. RECOMMENDED DESIGN LIMITATIONS AND USAGE:
(a) INTENDED USE- TO PROVIDE UNIFORM PROTRUDING SHOULDERS FOR POSITIONING AND RETAINING MACHINE COMPONENTS IN HOUSING (BORES). THE RINGS ARE BENT LIKE A BOW OUT OF PLANE. FREE ENDS AND OPPOSITE EDGE ABUT OUTER GROOVE WALL. MIDSECTION OF RING ABUTS MACHINE PART, RING WILL TAKE UP END PLAY RESILIENTLY. THE USE OF THE FOLLOWING FORMULAS ARE BASED ON THE FACT THAT THE RING MATERIAL WILL NOT FAIL IN COMPRESSION.
LIMITATION ON USE - THE FOLLOWING FORMULAS ARE NOT TO BE USED FOR BRITTLE MATERIALS SUCH AS CAST IRON, ETC.
WARNING: RINGS SHOULD NOT BE EXCESSIVELY CONTRACTED DURING INSTALLATION SINCE THIS WILL LEAD TO RING FAILURE. IF RING HAS PLAY BETWEEN THE GROOVE DIAMETER AND THE OUTSIDE RING DIAMETER THIS INDICATES THAT THE RING HAS BEEN EXCESSIVELY CONTRACTED, (PROVIDING THE GROOVE DIAMETER HAS BEEN MACHINED TO RECOMMENDED DIMENSIONS).
(b) ALLOWABLE THRUST LOAD CAPACITY OF THE RINGS. (ABUTTING COMPONENTS TO HAVE SHARP CORNERS)=
P = ALLOWABLE THRUST LOAD (POUNDS) |
||
P = πHTX |
H = HOUSING DIAMETER (INCHES) T = RING, THICKNESS (INCHES) |
|
F |
WHERE: |
X = ULTIMATE SHEAR STRENGTH OF THE RING MATERIAL (PSI) 1/ |
F = FACTOR OF SAFETY |
||
A FACTOR OF SAFETY, F=4, IS RECOMMENDED, SINCE THE RING UNDER LOAD IS SUBJECTED NOT ONLY TO PURE SHEAR STRESSES, BUT ALSO TO BENDING STRESSES.
(c) ALLOWABLE LOAD CAPACITY OF GROOVE WALL =
P = ALLOWABLE COMPRESSION LOAD (POUNDS) H = HOUSING DIAMETER (INCHES)
P = πHdY d = GROOVE DEPTH (INCHES)
F WHERE: Y = YIELD STRENGTH IN COMPRESSION OF THE GROOVE MATERIAL (PSI)
F = FACTOR OF SAFETY
TO INSURE A SAFE WORKING LOAD A SAFETY FACTOR, F = 2, IS RECOMMENDED. (d) MINIMUM DISTANCE BETWEEN OUTER GROOVE WALL AND END OF HOUSING =
Z = MINIMUM DISTANCE BEWTWEEN OUTER GROOVE WALL Z = 3d AND END OF HOUSING (INCHES)
WHERE: d = GROOVE DEPTH (INCHES)
(e) LOCATION OF GROOVE =
L
MAX =
M
MIN +
X
MAX
L
MIN =
M
MAX +
X
MIN
1/ X = 120,000 PSI ULTIMATE SHEAR STRENGTH FOR RINGS UP TO AND INCLUDING .750 INCH HOUSING DIAMETER OF CARBON STEEL OR CORROSION RESISTANT STEEL.
X = 150,000 PSI ULTIMATE SHEAR STRENGTH FOR RINGS .777 INCH AND OVER HOUSING DIAMETER OF CARBON STEEL OR CORROSION RESISTANT STEEL.
X = 110,000 PSI ULTIMATE SHEAR STRENGTH FOR RINGS OF ALL HOUSING DIAMETERS AND OF BERYLLIUM COPPER.
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