1、MS90708D 16 OCTOBER 2012 SUPERSEDING MS90708C 28 June 1995 DETAIL SPECIFICATION SHEET RING, RETAINING, EXTERNAL, INTERLOCKING This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist
2、 of this specification sheet and procurement specification MIL-R-21248. FIGURE 1. RING, RETAINING. INCH-POUND AMSC N/A FSC 5325 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE 1 DIMENSIONS. S SHAFT (REF) D 1/ FREE (REF) A WIDTH ACROSS LUGS E T
3、2/ THICKNESS G W WIDTH R 4/ CH 4/ RECOMMENDED GROOVE (REF) OF RETAINED PART (REF) INCH MM BASIC BASIC TOL. BASIC TOL. BASIC TOL. BASIC TOL. BASIC TOL. MAX. MAX. .469 11.9 .414 .585 .003 .105 .035 .419 .0015 .040 .052 .040 .500 12.7 .459 .625 .105 .005 .035 .464 .004 .040 .052 .040 .594 15.1 .538 .71
4、0 .004 .105 .035 .544 FIM 3/ .040 +.003 .052 .040 .625 15.9 .569 .740 .105 .035 .575 .040 -.000 .052 .040 .669 17.0 .593 .815 .135 .042 .599 .047 .065 .050 .005 .002 .002 .750 19.0 .673 .894 .135 .042 .680 .004 .047 .065 .050 .781 19.8 .703 .925 .135 .042 .711 FIM 3/ .047 .065 .050 .875 22.2 .796 1.
5、017 .135 .042 .805 .047 .065 .050 .984 25.0 .863 1.172 .188 .050 .872 .003 .056 .086 .066 1.000 25.4 .863 1.172 .006 .188 .006 .050 .872 .004 .056 .081 .062 FIM 3/ 1.125 28.6 1.002 1.311 .188 .050 1.013 .056 .086 .066 1.188 30.2 1.064 1.373 .188 .050 1.075 .003 .056 .086 .066 1.250 31.7 1.126 1.435
6、.188 .050 1.138 .005 .056 .086 .066 1.375 34.9 1.250 1.559 .007 .188 .050 1.263 FIM 3/ .056 +.004 .086 .066 1.500 38.1 1.374 1.683 .188 .050 1.388 .056 -.000 .086 .066 1.562 39.7 1.412 1.778 .222 .062 1.427 .068 .100 .077 1.625 41.3 1.474 1.840 .222 .062 1.489 .068 .100 .077 1.750 44.4 1.597 1.963 .
7、222 .062 1.614 .005 .068 .100 .077 1.772 45.0 1.597 1.963 .008 .222 .062 1.614 .005 .068 .094 .072 1.875 47.6 1.721 2.090 .222 .062 1.739 FIM 3/ .068 .100 .077 1.969 50.0 1.779 2.209 .262 .078 1.797 .086 .114 .088 2.000 50.8 1.809 2.242 .262 .007 .078 1.828 .086 .114 .088 2.125 54.0 1.933 2.364 .262
8、 .078 1.953 .086 .114 .088 2.156 54.8 1.933 2.364 .262 .078 .003 1.953 .086 .104 .080 2.250 57.1 2.057 2.488 .262 .078 2.078 .086 .114 .088 .010 .005 2.375 60.3 2.180 2.610 .262 .078 2.203 .006 .086 +.005 .114 .088 2.500 63.5 2.304 2.734 .262 .078 2.328 FIM 3/ .086 -.000 .114 .088 2.625 66.7 2.428 2
9、.858 .262 .078 2.453 .086 .114 .088 2.750 69.8 2.518 3.049 .323 .093 2.544 .103 .143 .110 2.875 73.0 2.642 3.172 .323 .093 2.669 .103 .143 .110 .012 .006 3.000 76.2 2.754 3.294 .329 .008 .093 2.794 .006 .103 .143 .110 3.250 82.5 3.013 3.542 .325 .093 3.044 FIM 3/ .103 .144 .111 3.375 85.7 3.114 3.76
10、1 .015 .395 .109 3.145 .120 .182 .140 1/ D = DIMENSION “D” SHOULD NOT BE USED AS PART OF AN INSPECTION PROCEDURE, USE DIMENSION “A”. 2/ T = THICKNESS “T” APPLIES TO UNPLATED RINGS. FOR CORROSION RESISTANT STEEL AND PLATED RINGS, +.002 SHOULD BE ADDED TO THE MAXIMUM TOLERANCE, i.e. .002 SHOULD BE +.0
11、04/-.002. 3/ FIM = (FULL INDICATOR MOVEMENT) IS THE MAXIMUM ALLOWABLE DEVIATION OF CONCENTRTICITY BETWEEN THE GROOVE AND THE SHAFT. 4/ R AND CH = RADII OR CHAMFERS ALLOWABLE ON PARTS TO BE RETAINED BY THE RINGS. THRUST LOADS FOR RINGS, RETAINING PARTS WITH CORNER RADII OR CHAMFERS, ARE TABULATED ON
12、PAGE 8. MS90708D2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-REQUIREMENTS: 1. CLASSIFICATION: RETAINING RINGS FURNISHED UNDER THIS STANDARD SHALL BE TYPE I, CLASS 8 OF THE PROCUREMENT SPECIFICATION. 2. MATERIAL: (a) CARBON SPRING STEEL, GRADE 106
13、0 THRU 1095 (UNS G10600 THRU G10950) IN ACCORDANCE WITH ASTM A 568/A568M OR ASTM A684/A684M. (b) CORRISION RESISTANT STEEL, IN ACCORDANCE WITH SAE AMS 5520 (UNS S15700). (c) BERYLLIUM COPPER, ALLOY NUMBER 170 (UNS C17000) OR ALLOY NUMBER 172 (UNS C17200) IN ACCORDANCE WITH ASTM B194. 3. HARDNESS TAB
14、LE II. HARDNESS. SHAFT (REF) CARBON STEEL CORROSION RESISTANT STEEL BERYLLIUM COPPER .469 TO .625 INCL 66.5-71.5 HR30N 44-51 HRC 56.5-62 HR30N .669 TO 1.500 INCL 52.5-59.0 HR45N 44-51 HRC - 1.562 TO 3.375 INCL 48.0-53.0 HRC 44-51 HRC - .669 TO 1.875 INCL - - 37-43 HRC 4. PROTECTIVE FINISH OR TREATME
15、NT: (a). CARBON STEEL - SHALL BE AS SPECIFIED (SEE TABLE Ill OR IV) (1) CADMIUM PLATE IN ACCORDANCE WITH SAE AMS-QQ-P-416, TYPE II, CLASS 3 OR ASTM B 696, TYPE II, CLASS 5 OR ZINC-NICKEL PLATE IN ACCORDANCE WITH SAE AMS 2417, TYPE 2. (2) ZINC COAT IN ACCORDANCE WITH ASTM B633, TYPE II, CLASS Fe/Zn 5
16、 OR ASTM B 695, TYPE II, CLASS 5. (3) PHOSPHATE COAT IN ACCORDANCE WITH MIL-DTL-16232, TYPE Z, CLASS 2. (b) CORROSION RESISTANT STEEL - SHALL BE CLEANED, DESCALED AND PASSIVATED IN ACCORDANCE WITH SAE AMS2700. 5. PART NUMBER: THE BASIC MS PART NUMBER IS FOLLOWED BY A DASH NUMBER TAKEN FROM TABLE Ill
17、 OR IV. EXAMPLE: MS90708-1200 IS THE PART NUMBER FOR A CARBON STEEL, CADMIUM PLATE, EXTERNAL INTERLOCKING, RETAINING RING FOR USE ON A 2.000 DIAMETER SHAFT. 3 MS90708D Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. TABLE III. DASH NUMBERS FOR MS90
18、708 1/ SUBSTITUTE CORROSION RESISTANT STEEL WHEN USED IN FOOD PROCESSING MACHINERY, OR IN FUEL OR LUBRICATION SYSTEMS, OR WHEN USED AT TEMPERATURES OVER 450F (233C). S SHAFT (REF) 1/ CARBON STEEL CADMIUM PLATE OR ZINC-NICKLE PLATE 1/ CARBON STEEL ZINC COAT 1/ CARBON STEEL PHOSPHATE COAT STEEL, CORRO
19、SION RESISTANT 1/ BERYLLIUM COPPER DASH NO DASH NO DASH NO DASH NO DASH NO .469 -1046 -2046 -3046 -4046 -5046.500 -1050 -2050 -3050 -4050 -5050 .594 -1059 -2059 -3059 -4059 -5059.625 -1062 -2062 -3062 -4062 -5062.669 -1066 -2066 -3066 -4066 -5066 .750 -1075 -2075 -3075 -4075 -5075.781 -1078 -2078 -3
20、078 -4078 -5078 .875 -1087 -2087 -3087 -4087 -5087.984 -1098 -2098 -3098 -4098 -50981.000 -1098 -2098 -3098 -4098 -5098 1.125 -1112 -2112 -3112 -4112 -51121.188 -1118 -2118 -3118 -4118 -5118 1.250 -1125 -2125 -3125 -4125 -51251.375 -1137 -2137 -3137 -4137 -51371.500 -1150 -2150 -3150 -4150 -5150 1.5
21、62 -1156 -2156 -3156 -4156 -51561.625 -1162 -2162 -3162 -4162 -5162 1.750 -1175 -2175 -3175 -4175 -51751.772 -1175 -2175 -3175 -4175 -51751.875 -1187 -2187 -3187 -4187 -5187 1.969 -1196 -2196 -3196 -4196 2.000 -1200 -2200 -3200 -42002.125 -1212 -2212 -3212 -4212 2.156 -1212 -2212 -3212 -42122.250 -1
22、225 -2225 -3225 -4225 2.375 -1237 -2237 -3237 -4237 2.500 -1250 -2250 -3250 -42502.625 -1262 -2262 -3262 -4262 2.750 -1275 -2275 -3275 -42752.875 -1287 -2287 -3287 -4287 3.000 -1300 -2300 -3300 -4300 3.250 -1325 -2325 -3325 -43253.375 -1337 -2337 -3337 -4337 MS90708D 4 Provided by IHSNot for ResaleN
23、o reproduction or networking permitted without license from IHS-,-,-TABLE IV. SUBSTITUTION TABLE, CROSS REFERENCE OF PART NUMBERS INACTIVE SUBSTITUTE SUBSTITUTE SUBSTITUTE S SHAFT (REF) CARBON STEEL 1/ CARBON STEEL CADMIUM PLATE OR ZINC-NICKLE PLATE 1/ CARBON STEEL ZINC COAT 1/ CARBON STEEL PHOSPHAT
24、E COAT MS90708 MS90708 MS90708 MS90708 .469 -46 -1046 -2046 -3046.500 -50 -1050 -2050 -3050 .594 -59 -1059 -2059 -3059.625 -62 -1062 -2062 -3062 .669 -66 -1066 -2066 -3066.750 -75 -1075 -2075 -3075 .781 -78 -1078 -2078 -3078.875 -87 -1087 -2087 -3087 .984 -98 -1098 -2098 -30981.000 -98 -1098 -2098 -
25、3098 1.125 -112 -1112 -2112 -3112 1.188 -118 -1118 -2118 -3118 1.250 -125 -1125 -2125 -3125 1.375 -137 -1137 -2137 -3137 1.500 -150 -1150 -2150 -3150 1.562 -156 -1156 -2156 -3156 1.625 -162 -1162 -2162 -3162 1.750 -175 -1175 -2175 -3175 1.772 -175 -1175 -2175 -3175 1.875 -187 -1187 -2187 -3187 1.969
26、 -196 -1196 -2196 -3196 2.000 -200 -1200 -2200 -3200 2.125 -212 -1212 -2212 -3212 2.156 -212 -1212 -2212 -3212 2.250 -225 -1225 -2225 -3225 2.375 -237 -1237 -2237 -3237 2.500 -250 -1250 -2250 -3250 2.625 -262 -1262 -2262 -3262 2.750 -275 -1275 -2275 -3275 2.875 -287 -1287 -2287 -3287 3.000 -300 -130
27、0 -2300 -3300 3.250 -325 -1325 -2325 -3325 3.375 -337 -1337 -2337 -3337 1/ SUBSTITUTE CORROSION RESISTANT STEEL WHEN USED IN FOOD PROCESSING MACHINERY, OR IN FUEL OR LUBRICATION SYSTEMS, OR WHEN USED AT TEMPERATURES OVER 450F (233C). 5 MS90708DProvided by IHSNot for ResaleNo reproduction or networki
28、ng permitted without license from IHS-,-,-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. UNLESS OTHERWISE SPECIFIED, ISSUES OF REF
29、ERENCED DOCUMENTS ARE THOSE IN EFFECT AT THE TIME OF SOLICATION. 4. RECOMMENDED DESIGN LIMITATIONS AND USAGE. (a) INTENDED USE- TO PROVIDE HIGH CIRCULAR SHOULDERS FOR POSITIONING AND RETAINING MACHINE COMPONENTS ON SHAFTS. THE IDENTICAL SEMI-CIRCULAR HALVES HELD TOGETHER BY THE INTERLOCKING PRONGS F
30、ORM A BALLANCED RING CONCENTRIC WITH THE SHAFT, WHICH WILL WITHSTAND HIGH ROTATIONAL SPEEDS. THE USE OF THE FOLLOWING FORMULAS IS BASED ON THE FACT THAT THE MATERIAL WILL NOT FAIL IN COMPRESSION. LIMITATION ON USE- THE FOLLOWING FORMULAS ARE NOT TO BE USED FOR BRITTLE MATERIALS SUCH AS CAST IRON, ET
31、C. WARNING - RING HALVES SHOULD NOT BE OVER EXPANDED DURING INSTALLATION SINCE THIS WILL LEAD TO RING FAILURE. IF RING HAS PLAY BETWEEN THE GROOVE DIAMETER AND THE INSIDE RING DIAMETER THIS INDICATES THAT THE RING HAS BEEN OVER EXPANDED. (PROVIDING GROOVE HAS BEEN MACHINED TO RECOMMENDED DIMENSIONS)
32、. FOR APPROXIMATE SAFETY RPM LIMITS SEE TABLE V. TABLE V. APPROXIMATE SAFETY RPM LIMITS. SHAFT(INCHES) .500 1.000 1.500 2.000 2.500 3.000 3.375 CARBON STEEL AND CORROSION RESISTANT STEEL RPM LIMIT 50,000 30,000 22,000 15,000 12,000 9,000 6,800 BERYLLIUM COPPER RPM LIMIT 32,000 19,000 14,000 (b) ALLO
33、WABLE THRUST LOAD CAPACITY OF THE RINGS. ABUTTING COMPONENTS TO HAVE SHARP CORNERS. P = ALLOWABLE THRUST LOAD (POUNDS) S = SHAFT DIAMETER (INCHES) P = CFSTX T = RING THICKNESS (INCHES) F WHERE: X = ULTIMATE SHEAR STRENGTH OF THE RING MATERIAL (P.S.I.) 1/ F = FACTOR OF SAFETY, F=3 IS RECOMMENDED TO I
34、NSURE A SAFE WORKING LOAD. CF = CONVERSION FACTOR, CF= 3/4 IS RECOMMENDED SINCE SHEAR AREA IS REDUCED AT THE CUTOUTS IN THE RING. 1/ X = 150,000 P.S.I. ULTIMATE SHEAR STRENGTH FOR RINGS OF CARBON STEEL OR CORROSION RESISTANT STEEL. X = 110,000 P.S.I. ULTIMATE SHEAR STRENGTH FOR RINGS OF BERYLLIUM CO
35、PPER. MS90708D 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(c) ALLOWABLE LOAD CAPACITY OF GROOVE WALL P = ALLOWABLE COMPRESSION LOAD (POUNDS) P = CFSdY S = SHAFT DIAMETER (INCHES) F WHERE: d = GROOVE DEPTH (INCHES) Y = YIELD STRENGTH IN COMPRES
36、SION OF THE GROOVE MATERIAL (PSI) F = FACTOR OF SAFETY, F= 2 IS RECOMMENDED TO INSURE A SAFE WORKING LOAD. CF = CONVERSION FACTOR,CF= 3/4 IS RECOMMENDED SINCE CONTACT AREA IN THE GROOVE IS REDUCED AT THE CUTOUTS IN THE RING (d) THE MINIMUM DISTANCE BETWEEN OUTER GROOVE WALL AND END OF SHAFT = Z = MI
37、NIMUM DISTANCE BEWTWEEN OUTER GROOVE WALL Z = 3d AND END OF SHAFT (INCHES). WHERE: d = GROOVE DEPTH (INCHES). (e) ALLOWABLE SHAFT DIAMETER = S = ALLOWABLE SHAFT DIAMETER S= G2+ 4FP G = GROOVE DIAMETER. Y CFWHERE: F = FACTOR OF SAFETY, SEE FORMULA (c) ABOVE. P = DESIGN LOAD. Y = YIELD STRENGTH IN COM
38、PRESSION OF GROOVE MATERIAL (P.S.I.). CF CONVERSION FACTOR, SEE FORMULA (c) ABOVE (f) DIFFERENTIAL ROTATION = DIFFERENTIAL ROTATION OF RING AND ADJACENT PART CREATES NO ELEMENT OF RISK IN THE APPLICATION OF THE RING UP TO THE ALLOWABLE LOAD CALCULATED TO THE ABOVE FORMULA (b). (g) IMPACT CAPACITY OF
39、 RING OR GROOVE WALL = IR = FOR THE RING (INCH POUNDS) ABUTTING COMPONENTS TO HAVE SHARP CORNERS IG = FOR THE GROOVE (INCH POUNDS). P = ALLOWABLE THRUST LOAD OF RING OR GROOVE (POUNDS).T = RING THICKNESS (INCHES). WHERE: IG = IMPACT CAPACITY OF GROOVE WALL (INCH POUNDS). d = GROOVE DEPTH (INCHES). I
40、R = IMPACT CAPACITY OF RING (INCH POUNDS). Pd 2 PT 2 7 MS90708D Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(h) LOAD CAPACITY, WITH THE RETAINED PART RADIUSED OR CHAMFERED: WHEN THE RADIUS OR CHAMFER OF THE RETAINED PART DOES NOT EXCEED THE MAXIM
41、UM RADIUS ALLOWED FOR THE BOTTOM OF THE RING GROOVE, THE LESSER LOAD CAPACITY COMPUTED FROM THE FORMULAS ON PAGE 4 WILL APPLY. THE CORNER RADII AND CHAMFERS LISTED ON PAGE 2 WERE CHOSEN AS LARGE AS POSSIBLE FOR THE RING SIZES INVOLVED AND ARE RELATED TO THE MAXIMUM THRUST LOADS LISTED IN TABLE VI. I
42、F THE CORNER RADII OR CHAMFERS ARE SMALLER THAN THOSE LISTED, THEN THE THRUST LOADS INCREASE PROPORTIONALLY IN ACCORDANCE WITH THE FOLLOWING FORMULAS: P1= PCH OR P1= NEW ALLOWABLE THRUST LOAD. CH1P = LISTED ALLOWABLE THRUST LOAD. WHERE: CH1= NEW (SMALLER) CHAMFER. CH = LISTED CHAMFER. P1= PR R1= NEW
43、 (SMALLER) CORNER RADIUS. R1R = LISTED CORNER RADIUS. LIMIT LOADS LISTED BELOW ARE BASED ON RINGS OF STEEL (WORKING STRESS = 250,000 P.S.I.) AND OF BERYLLIUM COPPER (WORKING STRESS = 180,000 P.S.I.). IF THE ALLOWABLE GROOVE CAPACITY LOADS AS CALCULATED BY USING THE FORMULA GIVEN ABOVE ARE LESS, THEN
44、 THEY SHOULD BE USED. . TABLE VI. LIMIT LOADS. NOMINAL RING SIZE ALLOWABLE THRUST LOAD FOR RING ASSEMBLIES WITH PARTS HAVING MAXIMUM CORNER RADII OR CHAMFERS FROM TO CARBON STEEL OR CORROSION RESISTANT STEEL BERYLLIUM COPPER .496 .625 610 LB 440 LB .669 .875 880 LB 630 LB .984 1.500 1250 LB 900 LB 1
45、.562 1.875 1900 LB 1370 LB 1.969 2.625 3050 LB - 2.750 3.250 4300 LB -3.375 - 5950 LB - 5. CHANGES FROM PREVIOUS ISSUE. MARGINAL NOTATIONS ARE NOT USED IN THIS REVISION TO IDENTIFY CHANGES WITH RESPECT TO THE PREVIOUS ISSUE DUE TO THE EXTENT OF THE CHANGES. MILITARY INTEREST Custodians: Preparing ac
46、tivity: Army - AR DLA - IS Navy - AS Air Force - 99 (Project 5325-2012-018) Review activities: Army AT, AV, CR, CR4 Navy MC, SH, YD Air Force - 71 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.dla.mil. MS90708D 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
