1、AMSC N/A FSC 5325 DETAIL SPECIFICATION SHEET RING, RETAINING, EXTERNAL, HEAVY-DUTY (TAPERED SECTION TYPE) 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 of this specificati
2、on sheet and procurement specification MIL-R-21248. FIGURE 1. Ring, Retaining. MS3217C 25 October 2011 SUPERSEDING MS3217B 14 JULY 1989 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS3217C 2 TABLE I. Dimensions. S SHAFT (REF) D FREE B L
3、UG HEIGHT E LARGE SECTION HEIGHT J SMALL SECTION HEIGHT T 1/ THICKNESS INCH MM BASIC TOL BASIC TOL BASIC TOL BASIC TOL BASIC TOL .394 10.0 .362 +.003 .101 .068 .039 .035 -.008 .004 .004 .473 12.0 .435 .101 .088 .053 .042 .500 12.7 .460 .120 .004 .090 .050 .050 .002 .591 15.0 .543 .130 .102 .005 .057
4、 .005 .050 .625 15.9 .575 .130 .106 .059 .050 .669 17.0 .616 .130 .112 .062 .050 .750 19.0 .689 .180 .127 .077 .078 .787 20.0 .689 +.005 .180 .127 .077 .078 .875 22.2 .804 -.010 .180 .148 .006 .083 .006 .078 .984 25.0 .906 .180 .151 .084 .078 1.000 25.4 .906 .180 .151 .084 .078 1.062 27.0 .978 .220
5、.161 .090 .093 1.125 28.6 1.036 .220 .169 .095 .093 1.181 30.0 1.087 .220 .176 .098 .093 1.188 30.2 1.087 .220 .005 .176 .098 .093 +.010 .007 .007 .003 1.250 31.7 1.150 -.015 .220 .185 .103 .093 1.312 33.3 1.208 .220 .192 .106 .093 1.375 34.9 1.268 .220 .200 .110 .093 1.378 35.0 1.268 .220 .200 .110
6、 .093 1.500 38.1 1.380 .280 .218 .123 .109 1.562 39.7 1.437 .280 .228 .127 .109 1.575 40.0 1.437 .280 .228 .127 .109 1.750 44.4 1.608 +.013 .290 .254 .008 .140 .008 .109 1.772 45.0 1.608 -.020 .290 .254 .140 .109 1.938 49.2 1.782 .314 .280 .154 .125 .006 .004 1.969 50.0 1.782 .314 .280 .154 .125 2.0
7、00 50.8 1.840 .314 .290 .160 .125 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS3217C 3 TABLE I. Dimension. (Continued) 1/ T = Thickness “T” applies to unplated rings. For corrosion resistant steel and plated rings, +.002 should be added to the m
8、aximum tolerance, i.e., .002 should be +.004/-.002. 2/ FIM = (Full Indicator Movement) is the maximum allowable deviation of concentricity between the groove and the shaft. 3/ K = Maximum diameter when the ring is properly seated in the groove (design reference dimension). 4/ C = Actual clearance di
9、ameter when the ring is sprung over the shaft prior to installation into the groove (design reference dimension). 5/ R and CH = Radii or chamfers allowable on parts to be retained by the rings. Thrust loads of rings, retaining parts with corner radii or chamfers (see note “3 (g)” on page 7). Require
10、ments: 1. Classification: Retaining rings furnished under this standard shall be Type I, Class 10 of the procurement specification, MIL-R-21248. 2. Material: (a) Carbon steel, grade 1060 thru 1095 (UNS G10600 thru G10950) in accordance with ASTM A568/A568M or ASTM A684/A684M. (b) Corrosion resistant
11、 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: S SHAFT (REF) G W WIDTH K 3/ C 4/ CLEAR R 5/ CH 5/ RECOMMENDED GROOVE (REF) OF RETAINED PART (REF) INCH MM BASIC TOL BASI
12、C TOL MAX MAX MAX .394 10.0 .368 +.001 .040 +.003 .479 .61 .047 .039 -.002 -.000 .473 12.0 .444 .002 .047 .589 .69 .070 .058 .500 12.7 .468 FIM 2/ .056 +.004 .613 .75 .070 .058 .591 15.0 .555 .056 -.000 .719 .86 .070 .058 .625 15.9 .588 .056 .758 .90 .074 .062 .669 17.0 .629 +.001 .056 .808 .94 .077
13、 .064 .750 19.0 .704 -.003 .086 .913 1.12 .089 .074 .787 20.0 .740 .002 .086 .949 1.16 .089 .074 .875 22.2 .821 .086 1.056 1.25 .100 .083 .984 25.0 .925 FIM 2/ .086 1.164 1.36 .100 .083 1.000 25.4 .938 .086 1.177 1.37 .100 .083 1.062 27.0 .998 .103 1.256 1.52 .106 .088 1.125 28.6 1.059 .103 1.329 1.
14、58 .112 .093 1.181 30.0 1.111 +.002 .103 1.391 1.64 .112 .093 1.188 30.2 1.111 -.004 .103 +.005 1.391 1.64 .112 .093 .004 -.000 1.250 31.7 1.174 .103 1.468 1.70 .112 .093 1.312 33.3 1. 234 FIM 2/ .103 1.538 1.77 .128 .107 1.375 34.9 1.291 .103 1.607 1.83 .128 .107 1.378 35.0 1.291 .103 1.607 1.83 .1
15、28 .107 1.500 38.1 1.406 .120 1.752 2.08 .128 .107 1.562 39.7 1.468 +.003 .120 1.829 2.14 .128 .107 1.575 40.0 1.480 -.004 .120 1.841 2.15 .128 .107 1.750 44.4 1.650 .004 .120 2.050 2.34 .128 .107 1.772 45.0 1.669 .120 1.069 2.37 .128 .107 1.938 49.2 1.826 FIM 2/ .139 2.265 2.58 .153 .128 +.006 1.96
16、9 50.0 1.850 .139 -.000 2.289 2.61 .153 .128 2.000 50.8 1.880 .139 2.334 2.64 .153 .128 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS3217C 4 TABLE II. Hardness. SHAFT (REF) CARBON STEEL CORROSION RESISTANT STEEL BERYLLIUM COPPER .394 to .625 .66
17、9 to 2.000 incl. 67.5 75 HR30N 47 - 52 HRC 63 69.5 HR30N 44 - 51 HRC 54 - 62 HR30N 34 - 43 HRC 4. Protective finish or surface treatment: (a) Carbon steel shall be as specified (see Table III): (1) Cadmium plate in accordance with SAE-AMS-QQ-P-416, Type II, Class 3 or ASTM B696, Type II, Class 5. (2
18、) Zinc coat in accordance with ASTM B633, Type II, Class Fe/Zn5, or ASTM B695, Type II, Class 5. (3) Phosphate coating 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
19、part number is followed by a dash number taken from Table III. Example: MS3217-1200 is the part number for a carbon steel, cadmium plate, external, heavy duty retaining ring for use on a 2.000 diameter shaft. TABLE III. Dash numbers for MS3217 S SHAFT (REF) CARBON STEEL 1/ CADMIUM PLATE CARBON STEEL
20、 1/ ZINC COAT CARBON STEEL 1/ PHOSPHATE COAT STEEL, CORROSION RESISTANT BERYLLIUM 1/ COPPER DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. .394 .473 .500 .591 .625 .669 .750 .787 .875 .984 1.000 1.062 1.125 1.181 1.188 1.250 1.312 1.375 1.378 1.500 1.562 1.575 1.750 1.772 1.938 1968 2.000 -1039 -1047
21、-1050 -1059 -1062 -1066 -1075 2/ -1075 2/ -1087 -1098 2/ -1098 2/ -1106 -1112 -1118 2/ -1118 2/ -1125 -1131 -1137 2/ -1137 2/ -1150 -1156 2/ -1156 2/ -1175 2/ -1175 2/ -1193 2/ -1193 2/ -1200 -2039 -2047 -2050 -2059 -2062 -2066 -2075 2/ -2075 2/ -2087 -2098 2/ -2098 2/ -2106 -2112 -2118 2/ -2118 2/
22、-2125 -2131 -2137 2/ -2137 2/ -2150 -2156 2/ -2156 2/ -2175 2/ -2175 2/ -2193 2/ -2193 2/ -2200 -3039 -3047 -3050 -3059 -3062 -3066 -3075 2/ -3075 2/ -3087 -3098 2/ -3098 2/ -3106 -3112 -3118 2/ -3118 2/ -3125 -3131 -3137 2/ -3137 2/ -3150 -3156 2/ -3156 2/ -3175 2/ -3175 2/ -3193 2/ -3193 2/ -3200
23、-4039 -4047 -4050 -4059 -4062 -4066 -4075 2/ -4075 2/ -4087 -4098 2/ -4098 2/ -4106 -4112 -4118 2/ -4118 2/ -4125 -4131 -4137 2/ -4137 2/ -4150 -4156 2/ -4156 2/ -4175 2/ -4175 2/ -4193 2/ -4193 2/ -4200 -5039 -5047 -5050 -5059 -5062 -5066 -5075 2/ -5075 2/ -5087 -5098 2/ -5098 2/ -5106 -5112 -5118
24、2/ -5118 2/ -5125 -5131 -5137 2/ -5137 2/ -5150 -5156 2/ -5156 2/ -5175 2/ -5175 2/ -5193 2/ -5193 2/ -5200 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) 2/ Same dash numbers suitable f
25、or either shaft diameter (inches or mm) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS3217C 5 Notes: 1. Unless otherwise specified, all dimensions in inches. 2. In the event of a conflict between the text of this standard and the references cited
26、 herein, the text of this standard shall take precedence. 3. Recommended design limitations and usage: (a) Intended use To provide large shoulders for positioning and retaining machine components under heavy loading conditions on shafts, even if components to be secured have large corner radii or ch
27、amfers abutting the rings. They withstand comparatively heavy shock loads and high rotational speeds. They eliminate the need for separate thrustwashers. The use of the following formulas are based on the fact that the ring will not fail in compression. Limitation on use the following formulas are n
28、ot to be used for brittle materials such as cast iron, etc. Warning Rings shall 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 gr
29、oove has been machined to recommended dimensions). For approximate safety RPM limits see Table IV. TABLE IV. Calculated RPM limits. Apply required safety factor. SHAFT (INCHES) .394 .437 .500 .750 1.000 1.250 1.500 1.750 2.000 CARBON STEEL AND CORROSION RESISTANT STEEL RPM LIMIT 80,000 69,000 65,000
30、 40,000 30,000 23,000 18,500 15,500 14,000 BERYLLIUM COPPER RPM LIMIT 51,000 44,000 41,000 26,000 19,000 14,500 12,000 10,000 9,000 (b) Allowable thrust load capacity of the ring. Abutting components to have sharp corners = P = Cf STX F Where: P = Allowable thrust load (Pounds) S = Shaft diameter (I
31、nches) T = Ring thickness (Inches) X = Ultimate shear strength of the ring material (PSI) 1/ F = Factor of safety, F = 4 is recommended to insure a safe working load Cf= Conversion factor, CF= 1.3 is required since thicker rings increase safety of assembly (c) Allowable load capacity of groove wall
32、= P = CfSdY F Where: P = Allowable compression load (Pounds) S = Shaft diameter (Inches) 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= 2 is required since co
33、ntact area in groove is increased due to thicker ring Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS3217C 6 (d) Minimum distance between outer groove wall and end of shaft = Z = 3d Where: Z = Minimum distance between outer groove and end of shaft
34、 (Inches) d = Groove depth (Inches) (e) Allowable shaft diameter = S = G2+ 4FP YCfWhere: S = Allowable shaft diameter G = Groove depth F = Factor of safety (see formula (c) above) P = Design load Y = Yield strength in compression of the groove material (PSI) Cf= Conversion factor (see formula (c) ab
35、ove) (f) Differential rotation = The condition 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 th
36、e 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 b
37、ottom of the groove, formulated as follows: fPN sTE2 or 18 P sTE2F18N Where: P = Allowable thrust load exerted by adjacent part (Pounds) f = Coefficient of friction s = Working stress of ring under maximum expansion (PSI) 2/ T = Ring thickness (Inches) E = Greatest width section of ring (Inches) N =
38、 Neutral ring diameter (Inches) = free diameter plus 3/4 E dimension In such cases where differential rotation occurs, the calculation should be based on the MAXIMUM possible value of the coefficient of friction. Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
39、om IHS-,-,-MS3217C 7 (g) Impact capacity of ring and groove wall = IR= PT - For the ring (Inch Pounds) Abutting components to have sharp corners 2 IG= Pd - For the groove (Inch Pounds) 2 Where: P =. Allowable thrust load of rings or grooves (Pounds) T = Ring thickness (Inches) IR= Impact capacity of
40、 ring (Inch Pounds) IG= Impact capacity of groove wall (Inch Pounds) d = Groove depth (Inches) 1/ X = 150,000 PSI ultimate shear strength for rings of carbon steel or corrosion resistant steel. X = 110,000 PSI ultimate shear strength for rings of beryllium copper. 2/ s = 250,000 PSI working stress f
41、or rings of carbon steel or corrosion resistant steel. s = 180,000 PSI working stress for rings of beryllium copper. (h) Load capacity with the retained part radiused or chamfered = when the radius or chamfer of the retained part does not exceed the maximum radius allowed for the bottom of the ring
42、groove, the lesser load capacity computed from the formals on pages 5 and 7 will apply. The corner radii and chamfers listed on page 1 were chosen as large as possible for the ring sizes involved and are related to the maximum thrust loads listed in the table below. If the corner radii or chamfers a
43、re smaller than those listed, then the thrust loads increase proportionally, in accordance with the following formulas: Limit loads listed in Table V are based on rings of carbon steel or corrosion resistant steel (working stress 250,000 PSI) and of rings of beryllium copper (working stress = 180,00
44、0 PSI) if the allowable groove capacity loads as calculated by using the formula on page 5 are less, then they should be used. P1= P R R1Where: P1= P Ch Ch1P1= New allowable thrust load P = Listed allowable thrust load R1= New (smaller) corner radius R = Listed corner radius Ch1 = New (smaller) cham
45、fer Ch = Listed chamfers Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS3217C 8 Table V. Limit loads S Shaft (Ref) Allowable thrust load for ring assemblies with parts having maximum corner radii or chamfers From To Carbon steel or CRES Beryllium
46、copper - - - .591 - .750 1.062 1.500 1.938 .394 .473 .500 .625 .669 1.000 1.378 1.772 2.000 450 LB 550 LB 650 LB 750 LB 900 LB 2500 LB 4000 LB 5000 LB 6000 LB 300 LB 400 LB 450 LB 550 LB 650 LB 1800 LB 2900 LB 3600 LB 4300 LB 4. Changes from previous issue. Marginal notations are not used in this re
47、vision to identify changes with respect to the previous issue due to the extent of the changes. MILITARY INTEREST Custodians: Preparing activity: Army - AR DLA - IS Navy - OS Air Force - 99 (Project 5325-2011-004) 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.daps.dla.mil Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
