MS90707C
TABLE V. APPROXIMATE SAFETY RPM LIMITS.
0 SHAFT(INCHES) |
.125 |
.250 |
.312 |
.375 |
.437 |
.500 |
.625 |
.750 |
|
CARBON STEEL AND CORROSION RESISTANT STEEL |
RPM LIMIT |
80,000 |
77,000 |
58,000 |
51,000 |
44,000 |
40,000 |
32,000 |
25,000 |
BERYLLIUM COPPER |
RPM LIMIT |
51,000 |
49,000 |
37,000 |
32,000 |
28,000 |
25,000 |
20,000 |
16,000 |
(b) ALLOWABLE THRUST LOAD CAPACITY OF THE RINGS ARE LISTED IN TABLE VII.
(c) THE RINGS ARE BASICALLY DESIGNED TO BE USED WITHOUT GROOVES. THE THRUST LOAD CAPACITY OF A GRIP RING ASSEMBLY MAY BE INCREASED SUBSTANTIALLY BY INSTALLING THE RING IN A SHALLOW GROOVE (ONLY FOR SIZES .250 AND OVER). THE STRENGTH OF THE GROOVE WALL THEN BECOMES THE LIMITING FACTOR IN THE ASSEMBLY.
ALLOWABLE LOAD CAPACITY OF GROOVE WALL: (RETAINED PARTS HAVING SHARP CORNERS, OR RADII, OR CHAMFERS UP TO SPECIFIED LIMITS.)
P = ALLOWABLE COMPRESSION LOAD (POUNDS)
P = CF πSdY S = SHAFT DIAMETER (INCHES)
F WHERE: d = GROOVE DEPTH (INCHES)
Y = YIELD STRENGTH IN COMPRESSION OF THE GROOVE MATERIAL (PSI) F = FACTOR OF SAFETY, F= 2 IS RECOMMENDED TO INSURE A SAFE
WORKING LOAD.
CF = CONVERSION FACTOR, CF = 1 IS RECOMMENDED SINCE CONTACT AREA IN THE GROOVE WALL IS AROUND ENTIRE CIRCUMFERENCE.
(d) WHEN RINGS ARE USED IN GROOVES, THE MINIMUM DISTANCE BETWEEN OUTER GROOVE WALL Z SHALL BE = TABLE VI. OUTER GROOVE WALLS.
NOMINAL RING SIZE |
Z (MIN) |
.250 TO .437 .500 .625 .750 |
.030 .040 .045 .050 |
(e) DIFFERENTIAL ROTATION =
DIFFERENTIAL ROTATION OF RING AND ADJACENT PART CREATES NO ELEMENT OF RISK IN THE APPLICATION OF THE RING.
(f) IMPACT CAPACITY OF RING ON SHAFTS WITHOUT GROOVES IS MODERATE. IF RINGS ARE USED IN GROOVES, THE IMPACT CAPACITY INCREASES AND THE GROOVE WALL IS THE LIMITING FACTOR IN THE ASSEMBLY.
IMPACT CAPACITY OF GROOVE WALL=
IG = Pd
2
P = ALLOWABLE THRUST LOAD (POUNDS) WHERE: d = GROOVE DEPTH (INCHES)
IG = IMPACT CAPACITY OF GROOVE WALL (INCH POUNDS)
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