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MS16624 2012

INCH-POUND

MS16624D

w/AMENDMENT 1

14 March 2012

SUPERSEDING

MS16624D

10 January 2012

DETAIL SPECIFICATION SHEET

RING, RETAINING, EXTERNAL, BASIC

(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 specification sheet and

procurement specification MIL-R-21248.

AMSC N/A FSC 5325 --`,,```,,,,````-`-`,,`,,`,`,,`---

Provided by IHS

No reproduction or networking permitted without license from IHS

Not for Resale

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REQUIREMENTS:

1. CLASSIFICATION: RETAINING RINGS FURNISHED UNDER THIS STANDARD SHALL BE TYPE I, CLASS 2 OF THE PROCUREMENT SPECIFICATION.

2. MATERIAL: CARBON SPRING STEEL, GRADE 1060 THRU 1095 (UNS G10600 THRU G10950) IN ACCORDANCE WITH

ASTM A 568/A568M OR ASTM A684/A684M.

CORRISION RESISTANT STEEL, IN ACCORDANCE WITH SAE AMS 5520 (UNS S15700).

BERYLLIUM COPPER, ALLOY NUMBER 170 (UNS C17000) OR ALLOY NUMBER 172 (UNS C17200) IN ACCORDANCE WITH ASTM B194.

3. HARDNESS

TABLE II. HARDNESS.

?SHAFT (REF) CARBON STEEL CORROSION RESISTANT STEEL

BERYLLIUM COPPER

.125 TO .236 77 TO 82 HRI5N .250 TO .669 68.5-73.0 HR30N .668 TO 1.500 52.5-59.0 HR45N 1.562 TO 3.437 46.0-51.0 HRC 3.500 & ABOVE 44.0-49.0 HRC .250 TO .812 63-69.5 HR30N .875 & ABOVE 44-51 HRC .250 TO 1.023 56.5 TO 62 HR30N 1 .062 & ABOVE 37 TO 43 HRC

4. PROTECTIVE FINISH OR TREATMENT:

a. CARBON STEEL - SHALL BE (SEE TABLE Ill, IV, OR V)

1. CADMIUM PLATE IN ACCORDANCE WITH SAE AMS-QQ-P-416, TYPE II, CLASS 3 OR ASTM B 696, TYPE II, CLASS 5.

2. ZINC COAT IN ACCORDANCE WITH ASTM B633, TYPE II, CLASS Fe/Zn 5 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.

c. BERYLLIUM COPPER - CADMIUM PLATE OR ZINC-NICKEL IN ACCORDANCE WITH AMS 2417, TYPE 2, AND IN

ACCORDANCE WITH SAE AMS- QQ-P-416, TYPE II, CLASS 3 OR ASTM B 696, TYPE II, CLASS 5.

5. PART NUMBER: THE BASIC MS PART NUMBER IS FOLLOWED BY A DASH NUMBER TAKEN FROM TABLE Ill, IV, OR V.

EXAMPLE: MS16624-1100 IS THE PART NUMBER FOR A CARBON STEEL, CADMIUM PLATE, EXTERNAL BASIC

RETAINING RING FOR USE ON A 1.000 SHAFT DIAMETER.

MS16624D w/AMENDMENT 1

Provided by IHS

Not for Resale

No reproduction or networking permitted without license from IHS

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TABLE V. SUBSTITUTION TABLE (CROSS REFFERENCE OF PART NUMBERS).

?S SHAFT (REF)

INACTIVE INACTIVE SUBST ?S

SHAFT

(REF)

INACTIVE SUBST

BERYLLIUM 1/

COPPER

BERYLLIUM 1/

COPPER

BERYLLIUM 1/

COPPER

BERYLLIUM

COPPER

CAD OR

ZINC - NICKEL

PLATE

BERYLLIUM 1/

COPPER

CAD OR

ZINC - NICKEL

PLATE MS9012 MS16624 MS16624 MS16624 MS16624

.125 01 12 5012 .125 1012 5012-1 .156 02 15 5015 .156 **** ****-1 .188 03 18 5018 .188 **** ****-1

.197 04 19 5019 .197 1019 5019-1 .219 05 21 5021 .219 1021 5021-1 .236 06 23 5023 .236 1023 5023-1

1/ SUBSTITUTE CORROSION RESISTANT STEEL WHEN USED IN FOOD PROCESSING MACHINERY, OR IN FUEL OR LUBRICATION SYSTEMS, OR WHEN USED AT TEMPERATURES OVER 450°F (233°C).

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. TAPERED DESIGN PRINCIPLE PERMITS RINGS TO MAINTAIN PRACTICALLY CONSTANT CIRCULARITY AND PRESSURE AGAINST BOTTOM OF GROOVE, COUNTERACTING CONSIDERABLE CENTRIFUGAL FORCE (SEE TABLE IV). RINGS FOR SHAFT DIAMETERS OVER 4 INCHES ARE SPECIALLY DIMENSIONED TO MAINTAIN BALANCE IN ROTATION. 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 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 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).

FOR APPROXIMATE SAFETY RPM LIMITS SEE TABLE VI.

TABLE VI. APPROXIMATE SAFETY RPM LIMITS.

SHAFT(INCHES) .125 .500 1 2 3 4 6 8 10

CARBON AND CORROSION RESISTANT STEEL RPM

LIMIT

80,000 40,000 20,000 10,000 6,700 5,000 3,400 2,500 2,000

BERYLLIUM COPPER RPM

LIMIT

50,000 25,000 13,000 6,400

MS16624D

w/AMENDMENT 1

Provided by IHS

Not for Resale No reproduction or networking permitted without license from IHS --` , , ` ` ` , , , , ` ` ` ` -` -` , , ` , , ` , ` , , ` ---

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(b) ALLOWABLE THRUST LOAD CAPACITY OF THE RINGS. ABUTTING COMPONENTS TO HAVE SHARP CORNERS= P = ALLOWABLE THRUST LOAD (POUNDS) P = πSTX S = SHAFT DIAMETER (INCHES) F WHERE: T = RING THICKNESS (INCHES) X = ULTIMATE SHEAR STRENGTH OF THE RING MATERIAL (PSI) 1/ F = FACTOR OF SAFETY

A SAFETY FACTOR, F= 4, IS RECOMMENDED SINCE THE RING UNDER LOAD IS SUBJECTED NOT ONLY TO THE PURE SHEAR STRESSES, BUT ALSO TO BENDING STRESSES.

(c) ALLOWABLE LOAD CAPACITY OF GROOVE WALL P = ALLOWABLE COMPRESSION LOAD (POUNDS) P = 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

TO INSURE A SAFE WORKING LOAD, A SAFETY FACTOR, F= 2, IS RECOMMENDED.

(d) MINIMUM DISTANCE BETWEEN OUTER GROOVE WALL AND END OF SHAFT = Z= 3d Z = MINIMUM DISTANCE BETWEEN OUTER GROOVE AND END OF SHAFT

(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 BOTIOM OF THE GROOVE, FORMULATED AS FOLLOWS: P = ALLOWABLE THRUST LOAD EXERTED BY ADJACENT PART

(POUNDS)

fPN ≤ sTE 2 f = COEFFICIENT OF FRICTION

18 OR

s = WORKING STRESS OF RING UNDER MAXIMUM EXPANSION (PSI) 2/ WHERE: T = RING THICKNESS (INCHES)

P ≤ sTE 2

E = GREATEST WIDTH SECTION O

F RIN

G (INCHES) f18N N = 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.

1/ X = 120,000 PSI ULTIMATE SHEAR STRENGTH FOR RINGS UP TO AND INCLUDING .672 INCH SHAFT DIAMETER OF CARBON STEEL OR CORROSION RESISTANT STEEL.

X = 150,000 PSI ULTIMATE SHEAR STRENGTH FOR RINGS .688 INCH AND OVER SHAFT DIAMETER OF CARBON STEEL OR CORROSION RESISTANT STEEL.

X = 110,000 PSI ULTIMATE SHEAR STRENGTH FOR RINGS OF ALL SHAFT DIAMETERS AND OF BERYLLIUM COPPER. 2/ S = 250,000 PSI WORKING STRESS FOR RINGS OF CARBON STEEL OR CORROSION RESISTANT STEEL. S = 200,000 PSI WORKING STRESS FOR RINGS OF BERYLLIUM COPPER.

Provided by IHS

Not for Resale

No reproduction or networking permitted without license from IHS

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(f) IMPACT CAPACITY OF RING OR GROOVE WALL =

I R = PT - FOR THE RING (INCH POUNDS), ABUTTING COMPONENTS TO HAVE SHARP CORNERS. 2

I G = Pd - FOR THE GROOVE (INCH POUNDS) 2 P = ALLOWABLE THRUST LOAD OF RINGS OR GROOVES (POUNDS) WHERE: T = RING THICKNESS (INCHES) I G = IMPACT CAPACITY OF GROOVE WALL (INCH POUNDS) d = GROOVE DEPTH (INCHES) I R = IMPACT CAPACITY OF RING (INCH POUNDS)

(g) 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 GROOVE, THE LESSER LOAD CAPACITY COMPUTED FROM THE FORMULAS ON PAGES , 9 AND 10 WILL APPLY. THE CORNER RADII AND CHAMFERS LISTED ON TABL 1 WERE CHOSEN AS LARGE AS POSSIBLE FOR THE RING SIZES INVOLVED AND ARE RELATED TO THE MAXIMUM THRUST LOADS LISTED IN TABLE II. IF THE CORNER RADII OR CHAMFERS ARE SMALLER THAN THOSE LISTED, THEN THE THRUST LOADS INCREASE PROPORTIONALLY, IN ACCORDANCE WITH THE FOLLOWING FORMULAS:

P 1 = P CH P 1 = NEW ALLOWABLE THRUST LOAD

CH 1 OR

P = LISTED ALLOWABLE THRUST LOAD

WHERE:

CH 1 = NEW (SMALLER) CHAMFER CH = LISTED CHAMFER

P 1 = PR R 1= NEW (SMALLER) CORNER RADIUS

R = LISTED CORNER RADIUS

LIMIT LOADS LISTED IN TABLE VII ARE BASED ON RINGS OF BERYLLIUM COPPER (WORKING STRESS 180,000 PSI) FOR SIZES BELOW .250 INCH AND ON RINGS OF STEEL (WORKING STRESS 250,000 PSI) FOR SIZES .250 INCH AND OVER. IF THE ALLOWABLE GROOVE CAPACITY LOADS AS CALCULATED BY USING THE FORMULA ON PAGE 7 ARE LESS, THEN THEY SHOULD BE USED.

TABLE VII. LIMIT LOADS.

4. AMENDMENT NOTATIONS. THE MARGINS OF THIS SPECIFICATION ARE MARKED WITH VERTICAL LINES TO INDICATE MODIFICATIONS GENERATED BY THIS AMENDMENT. THIS WAS DONE AS A CONVENIENCE ONLY

AND THE GOVERNMENT ASSUMES NO LIABILITY WHATSOEVER FOR ANY INACCURACIES IN THESE NOTATIONS. BIDDERS AND CONTRACTORS ARE CAUTIONED TO EVALUATE THE REQUIREMENTS OF THIS DOCUMENT BASED ON THE ENTIRE CONTENT IRRESPECTIVE OF THE MARGINAL NOTATIONS.

NOMINAL RING LOAD ALLOWABLE THRUST LOAD FOR RING ASSEMBLIES WITH

PARTS HAVING MAXIMUM CORNER RADII OR CHAMFERS

FROM TO CARBON STEEL OR CRES BERYLLIUM COPPER .125 .156 45 LB .188 .236 105 LB .250 .469 470 LB 340 LB .500 .672 950 LB 650 LB .688 1.023 1350 LB 950 LB 1.062 1.500 1950 LB 1400 LB 1.562 2.000 3000 LB 2100 LB 2.062 2.688 5000 LB 2.750 3.438 7350 LB 3.500 5.000 10500 LB 5.250 6.000 13500 LB 6.250 7.000 21000 LB 7.500 10.000 30000 LB

Provided by IHS

Not for Resale

No reproduction or networking permitted without license from IHS

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MILITARY INTEREST

Custodians: Preparing activity: Army - AR DLA - IS Navy - OS Air Force - 99 Review activities: (Project 5325-2012-005) Army - AT, AV, CR, GL, MI Navy - AS, MC Air Force - 11

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://https://www.wendangku.net/doc/058684767.html, .

MS16624D w/AMENDMENT 1

Provided by IHS

Not for Resale

No reproduction or networking permitted without license from IHS

--`,,```,,,,````-`-`,,`,,`,`,,`---

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