MS16628C
NOTES:
1. UNLESS OTHERWISE SPECIFIED, ALL 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 SHOULDERS FOR POSITIONING AND RETAINING MACHINE COMPONENTS ON SHAFTS.
THE RINGS ARE BENT LIKE A BOW OUT OF PLANE. FREE ENDS AND OPPOSITE EDGE ABUT MACHINE PART, MID- SECTION OF RING ABUTS OUTER GROOVE WALL. RING WILL TAKE UP END PLAY RESILIENTLY. THE RING WILL
COUNTERACT CONSIDERABLE CENTRIFUGAL FORCES. 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 OVER EXPANDED DURING INSTALLATION SINCE THIS WILL LEAD TO RING FAILURE.
IF THE RING HAS PLAY BETWEEN THE GROOVE DIAMETER AND THE INSIDE RING DIAMETER THIS INDICATES THAT THE RING HAS BEEN OVER EXPANDED, (PROVIDING THE GROOVE DIAMETER HAS BEEN
MACHINED TO RECOMMENDED DIMENSIONS).
FOR APPROXIMATE SAFETY RPM LIMITS SEE TABLE V.
TABLE V. APPROXIMATE SAFETY RPM LIMITS.
0 SHAFT (INCHES) |
.250 |
.500 |
1 |
1.500 |
|
CARBON STEEL AND CORROSION RESISTANT STEEL |
RPM LIMIT |
80,000 |
40,000 |
20,000 |
15,000 |
BERYLLIUM COPPER |
RPM LIMIT |
50,000 |
25,000 |
13,000 |
11,000 |
(b) ALLOWABLE THRUST LOAD CAPACITY OF THE RING (ABUTTING COMPONENTS TO HAVE SHARP CORNERS) =
P = ALLOWABLE THRUST LOAD (POUNDS) S = SHAFT DIAMETER (INCHES) |
||
P = πSTX |
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) S = SHAFT DIAMETER (INCHES)
P = πSdY. 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 SHAFT (INCHES)
WHERE: d = GROOVE DEPTH (INCHES)
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