MS16627C
NOTES:
1. DIMENSIONS IN INCHES, UNLESS OTHERWISE SPECIFIED.
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 HOUSINGS (BORES). TAPERED DESIGN PRINCIPLE PERMITS RINGS TO MAINTAIN PRACTICTICALLY CONSTANT CIRCULARITY, AND FIT SECURELY AGAINST BOTTOM OF GROOVE. ESPECIALLY SUITED FOR LOCATING AND RETAINING MACHINE PARTS HAVING CURVED ABUTTING SURFACES. 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) H = HOUSING DIAMETER (INCHES) |
||
P = 2 πHTX 3 F |
WHERE: |
T = RING, THICKNESS (INCHES) 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 = 1 πHdY. d = GROOVE DEPTH (INCHES)
2 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 BETWEEN OUTER GROOVE WALL Z = 3d AND END OF HOUSING (INCHES)
WHERE: d = GROOVE DEPTH (INCHES)
(e) DIFFERENTIAL ROTATION=
THE CONDITIONS UNDER WHICH A RETAINING RING MAY BE USED WHEN ADJACENT PARTS ROTATE RELATIVE TO IT, FALL INTO TWO CATEGORIES:
(1) WHERE NO THRUST IS EXERTED BY ADJACENT PART: IN THIS CASE, DIFFERENTIAL ROTATION OF RING AND ADJACENT PART CREATES NO ELEMENT OF RISK IN THE APPLICATION OF THE RINGS BECAUSE NO FRICTIONAL TORQUE IS EXERTED BY THE MACHINE PART ON THE RING.
(2) CONSIDERATION MUST BE GIVEN TO THE MAGNITUDE OF THE THRUST INVOLVED. THE FRICTION MOMENT MAY NOT EXCEED THE BENDING MOMENT, WHICH THE RING CAN TOLERATE WITHOUT RELEASING ITS PRESSURE AGAINST THE BOTTOM OF THE GROOVE, FORMULATED AS FOLLOWS:
7
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business