UDC 621.86.06 : 621.883.7

IS : 6132 ( Part I ) - 1971

Indian Standard SPECIFICATION FOR SHACKLES

PC%RT I GENERAL REQUIREMENTS

Lifting Chains and Associated Fittings and Components Sectional Committee, EDC 49

Chairman Representing DR K. N. SINHA Central Mining Research Station ( CSIR ), Dhanbad

Members SHRI B. L. CIIITLANCUA Indian Chain Manufacturing Co, Calcutta

SHRI G. S. ACJARWAL ( Alternate ) DEPUTY DIRECTOR ( MET-II ) Research,. Designs and Standards Organisation

( Mnnstry of Railways ), Chittaranjan !&SIST’AiVi’ DIRECTOR ( WELDIN ) (Alternate )

DEPUTY DIRECTOR STANDARDS Research, Designs and Standards Organisation ( Loco ) ( Ministry of Railways ), Lucknow

ASSISTANT DIRECTOR ( WELDING ) ( Alternate ) SHRI K. GANAPATTY Jessop & Co Ltd, Calcutta Sanr G. C. JOIN Hindustan Steel Ltd, Ranchi SHRC K. B. KALE W. H. Brady & Co Ltd, Bombay

SIXRI C. K. RADHAKRISHNAN ( Alternate) Smnr S. K~STHURI

SHRI S. RAQHAVAN (Alternate ) Ministry of Transport f;, Shipping ( Transport Wing )

Smi P. S. KAPOOR Indian Mining Association, Calcutta SHRI L. FLACK ( Altemnte )

SERI KULDIP CHAND Directorate General of Supplies 6: Disposals, New Delhi

SHRI C. S. RAO ( Alternate) hIA. T. v. Mam

SHRI P. K. K. NAIR (Alternate) Ministry of Defence ( DGI )

S.RRI P. RAJ~A~OPAL MENON Gears India, Madras SHRI P. M. NITYANANDAN (Alternate)

Smr P. K. NRVATIA Indian Link Chain Manufacturers Ltd, Bombay SHIL: 1’. A. OZA Ashok Steel Chain Manufacturing Co, Bombay

SHIU F. M. FERNANDIZ ( Alternate ) SHRI S. G. PI~ADHAN Tak Machinery Ltd, Bombay SHRI B. J. RAMXAKIUANI Directorate General Factory Advice Service and

Labour Institutes ( Ministry of Labour,

SH~I H. N. JAQTIANI ( Alternate ) Employment & Rehabilitation ), Bombay

SHRI H. A. RA~MSDALE Geo Miller & Co Private Ltd, Calcutta SHR~ P. CHATTERJEE (Alternate)

( Continued on page 2 )

iNDIAN STANDARDS INSTITUTION MANAK BIIAVAN, 9 BAHADU~~ SHAH ZAFAR MARC

NEW DELHI 1

PS : 6132 ( Part I ) - 1971

( Continued from page 1 )

Members Representing Smr N. P. ROY CEOWDEURY Mining and Allied Machinery Corporation Ltd,

SHRI S. N. BANERJEE (Alternate) Durgapur

SHRI K. C. SADRURHAN The Commissioners for the Port of Calcutta, Calcutta SHRI l3. R. CHATTERJEE ( Alternate )

SHRZ’M. V. PATANRAR, Director General, IS1 ( Ex-ojicio Member ) Director ( Mech Engg )

Secretary SHRI M. G. KRISHNA Rao

Deputy Director ( Mech Engg), IS1

Hooks and Ancillaries Subcommittee, EDC 49 : 3

Convener SHRI H. N. JAQTIANI Directorate General Factory Advice Service and

Labour Institutes ( Ministry of Labour, Employ- ment & Rehabilitation ), Bombay

Members SHRI A. BANERJEE

Sam Paw CHONA ( Alternate ) India Forge & Drop Stampings Ltd, Madras

Salr~ S. K. BASU Hindustan Steel Ltd, Ranchi SRRI T. C. SHARXA ( Alternate)

SI~RI G. V. CHELL.~ Ministry of Transport & Shipping (Transport Wing )

SHRI B. L. CIIITLANQIA Indian Chain Manufacturing Co, Calcutta SH$I G. S. AOARWAL ( Alternate )

SHRI A. M. COOPER Mazagon Dock Ltd, Bombay DEPUTY DIRECTOR STANDARDS Research, Designs and Standards Organisation

SH%% Dnv ( Mmistry of Railways ), Lucknow

SBRI Tl C: GHOSAL Jessop & Co Ltd, Calcutta

SHRI S. P. GHOSH ( Altemate ) The Indian Standard Wagon Co Ltd, Calcutta

SHRI B. MISRA SEIRI K. C. SADHUEHAN

Heavy Engineering Corporation Ltd, Ranchi The Commissioners for the Port of Calcutta, Calcutta

SHRI B. R. CHATTERJEE ( AlZemate )

2

IS : 6132 (Part I) - 1971

hdian Standard SPECIFICATION FOR SHACKLES

PART I GENERAL REQUIREMENTS

0. FOREWORD

0.1 This Indian Standard. (Part I) was adopted by the Indian Standards Institution on 15 June 1971, after the draft finalized by the Lifting Chains and Associated Fittings and Componetits Sectional Committee had been approved by the Mechanical Engineering Division Council.

0.2 This part covers. the general requirements for shackles, while the requirements regarding workmanship, finish, proof loading, marking and certification are covered in detail, in the case of dimensions only the range of dimensions and the applicable tolerances have been covered. Actual dimensions are covered in other parts of the standard which are under preparation. Part II of the standard covers the Dee shackles and Part III, the bow shackles.

0.3 Information to be provided with an enquiry and order and recommendations regarding suitable materials are given in Appendix A and ,L\ppendix l3 respectively.

0.4 In the preparation of this standard, considerable assistance has been derived from the Draft IS0 Proposal for Shackles : General Characteristics, Dot : ISO/TC 8 ( WG 2-3) 461, prepared by the Technical Committee ISO/TC 8 and ISO/TC 111 of the International Organization fol Standardization. Reference has also been made to Dot: ISO/TC 11 l/SC 3 ( Seer-30 ) 73 - Second Draft IS0 Proposal for Dee Shackles and Dot : ISO/TC 11 l/SC 3 (Seer-34) 74-Draft IS0 Proposal filr bow shackles.

0.5 For the purpose of deciding whether a particular requirement of this standard is ccmplied with, the final value, observed or calculated, express- ing the result of a test, shall be rounded off in accordance with IS : 2-1960*. The number cf significant places retained in the rounded off value should be the same as that of the specified value in this standard.

1. SCOPE

1.1 This standard (Part I) covers the requirements for the range of dimensions, workmanship, finish, proof loading, marking and certifications. _,.___.__ -_ .-.,..-- _.-.-

*Rules for rounding off numerical values ( revised j.

3

IS : 6132 ( Part I ) - 1971

2. TERMINOLOGY

2.0 For the purpose of this standard, the following definitions shall apply.

2.1 Shackle - A two-part link for lifting purposes. body and the pin, are readily~ separated.

The two parts, the

2.2 Body-One of the two parts of the shackle, consisting of a bar of circular section bent.through 180” terminating in coaxial eyes.

2.3 Crown-The bent part of the shackle body.

2.4 Pin- A straight bar of circular section which closes the shackle bod~y, arranged so as to be secure when in position and readily demountable.

2.5 D-Shackle, Dee Shackle- A shackle whose crown forms a semicircle of internal radius half the width between the eyes.

2.6 Bow Shackle-A shackle whose crown forms more than a semicircle, of internal radius more than half the width between the eyes.

2.7 Proof load -The load to which the shackle is subjected as specified in 9.1.

2.8 Working Load-The maximum (gravitational) mass which the shackle should support in general service. Alternatively, a reduced value for a particular service.

2.9 Competent Person - A person who is approved and declared as such under the relevant statutory provisions.

2.10 Processing-A treatment of the shackle subsequent to forging, such as heat treatment.

3. TYPES AND GRADES

3.1 There are two types of shackles:

a) Dee Shackle- A shackle of the form shown in Fig. 1, and b) Bow Shackle--A shackle of the form shown in Fig. 2.

3.2 The shackle pins are of the following four types:

a) Screwed pin with eye and collar (see Fig. 3 ); b) Countersunk screwed pin with slotted head (see Fig. 4 ); c) Bolt with hexagon head, hexagon nut and split cotter pin (see

Fig. 5); and d) Plain cylindrical pin with circular head and forelock (see Fig. 6 ).

4

d

IS i 6132 (Part I)-1971

FIG. 1 hE SHACKtE

FIG. 2 BOW SHACKLE

3.3 Grade-Shackles can be fabricated in more than one grade ofmaterial the variation of the material imparting vzrious mechanical characteristics’ They may be of grade 30,40 or 63 depending upon the material fi-om whicd the shackles have been fabricated.

5

IS : 6132 ( Part I ) - 1971

,.5OD-7.7 /--WSD

FIG. 3 SCREWED Pm WITH EYE AND COLLAR

PIG. 4 COUNTERSUNK SCREWED PIN WITH SLOTTED HEAD

0.20 0 APPROX

--

B

--Id-

(OPTIONAL)

FIG. 5 BOI..T WITH HEXAGON HEAD, HEXAGON NUT AND, SPLIT COTTER Pm

6

IS : 6132 (,Part I ) - 1971

FIG. 6 PLAIN CYLINDRICAL PIN WITH CIRCULAR HEAD AND FORELOCK

4. MATERIAL

4.1 Materials-The steel used in the manufacture of the body and pin shall be produced by the open hearth or electric process or any of the oxygen-blown processes and having a minimum tensile strength of 42 kgf/ mm2 in the case of grade 30 (IS0 Equivalent grade L), a tensile strength of 55 kgf/mm2 to 68 kgf/mms in the case of grade 40 (IS0 Equivalent grade M) and a minimum tensile strength of 80 kgf/mma in the case of grade 63 (IS0 Equivalent grade S) shackles.

4.1.2 The steel used is to be fully killed and is to contain not less than 0.020 percent of aluminium, sulphur and phosphorus content not to exceed 0.050 percent and 0.045 percent respectively.

4.2 Any steel which meets these requirements and when suitably heat- treated in the form of the finished shackle meets the specific requirements with regard to the mechanical properties, may be used. Suitable steels are given in Appendix B for information.

4.3 When so required by the purchaser, the manufacturer shall supply a copy of the steel maker’s cast analysis for the steel used in the manu- facture of shackles and shackle pins.

4.4 Hardness -The Brinnel hardness of the body and pin after heat treatment shall not exceed the following values when tested in accordance with IS : 1500-1968:

Grads

30 4.0 63

Minimum

- -

248

7

Maximum

170 217 302

IS: 6132 (Part I) - 1971

5. FORM AND DIMENSIONS

5.1 The form and dimensions shall be in accordance with the applicable requirements of Part II and Part III of this standard and in addition the dimensions shall fall within the following ranges:

Dimensions Sjmbol Minimum Maximum Value Va!ue

mm mm

Diameter of shackle body n - 115 Diameter of shackle pin D d 130 Outside diameter of eye e 20 -

5.2 Tolerances on Dimensions -The dimensions of the body of a shackle, except of the pin hole, shall be,not less than the nominal dimen- sions and shall not exceed them by more than 5 percent.

The diameter of the pin hole is subject to the following tolerances: Up to and including 20 mm dia hole + 1.0 mm,-0 mm Over 20 mm, up to and including + 1.2 mm,- 0 mm

45 mm dia hole Over 45 mm diameter hole + 1%6 mm,-0 mm

The diameter of the pin (dimension D), is subject to the following tolerances:

Up to and including 5@ mm dia pin Over 50 mm dia pin

6. SCREW THREADS

- 0.08 mm to--O*25 mm -0.13 mm to-O.50 mm

6.1 The screw threads shall conform to IS :4218-l 967*.

7. WORKMANSHIP AND FINISH

7.1 The bodies of the shackles shall be solid forgings,.without weld. .Pin or bolt holes in the bodies shall be drilled from the solid or hot pierced to two- thirds finished size and in all cases drilled or boredGn axial alignment, at one setting central to the outside diameter of the eyes.

7.1.X The pins shall be forged and machined, or machined from the bar. The screwed portion of the pin shall be concentric with the main portion of the body of the pin. When a screw pin is screwed home, not more than one half thread,is to be visible between.the~jaws of the shackles.

*ISO metric screw threads (in six parts).

8

IS o 6132 (Part I) - 1971

The length of’the plain portion of the bolt shall be such that when the nut is screwed on to the bolt, it jams on the end of the thread and not on the shackle body. The bolt is to be cross-drilled for the split cotter pin, positioned outside the nut.

7.2 Unless, otherwise required, the shackle shall be supplied in self colour. if protections against corrosion is specified they may be phosphated, zinc or cadmium electroplated, or galvanized or sherardized.

8. lljIEAT TREATMENT

8.1 All bodies and pins shall be subjected to one of the following heat treatments as agreed to between the purchaser and the manufacturer:

a) Normalizing by heating to a temperature within 50 deg above the upper critical point of the steel used, followed by cooling in still air.

b) Hardening and tempering by heating to temperature within 50 deg above the upper critical point of the steel used followed by quench- ing in oil brine or water and tempering.

8.2 Details of heat treatment which has been given to the shac!:les during manufacture shall be endorsed on the maker’s test certi(icate.

9. I’RQOP LQADI[NG

9.1. Each shackle after manufacture and subsequent heat treatment shall be subjected to the proof 10~iding of the value on which the design is based, applied at the centre of the pin by means of a round link or pin to which it shall withstand without showing permanent set. After removal of the proof load each shackle shall be thoroughly examined by a competent person and shall be accepted only if found free from visible flaw or defect.

10. INSPE@TI[ON, TEST AND EXAMINATION

10.1 The representative of the purchaser shall have access to the works of the manufacturer at all reasonable times for the purpose of witnessing the specified tests and inspecting the testiiig machine and methods of examination.

10.2 The manufacturer or supplier shall provide a certificate .with each consignment of shackle giving the following information for each consign- ment:

a) Type of material and details of heat treatment, bj Distinguishing mark to enable the particular shackle to be

identified, c) Proof load applied, and d) Working load.

IS:6132 (Part I)-1971

The certificate shall declare that each shackle was proof loaded in accordance with 9.1 and was subsequently examined by a competent person and it complies with this specification. It shall also state the name and address of the testing establishment and status of the signatory.

The certificate may be the appropriate statutory form provided that the required information is gi.ven.

11. MARKING 11.1 Grade Marking - The body of each shackle and the head of each pin shall be legibly and parmanently marked, with the grade of material

from which it has been fabricated within a circle, for example, @ for a

Grade 30 shackle.

11.2 Identification Marking - Each shackle body shall be permanently and legibly marked with the safe working load and with such individual marks and symbols as will provide indentification with the maker’s certifi- cate of test and examination. 11.3 Inspection Marking- When the test results are satisfact.ory the Inspector shall stamp the shackle with the inspection mark.

11.3.1 The shackles may. also be marked with the IS1 Certification Mark.

.Rio:rrt - The use of the IS1 Certification Mark is governed by the provisions of the Indian Srandards Institution (Certification Marks) Act, and the Rules and Regu- lations made thereunder. Preence of this mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard, under a well-defined system of inspection, testing and qtialic; control during production. This system, which is devised and supervised by ISI and operated by the producer, has the further safeguard that the products as actually marketed are continuously checked by IS1 for conformity to the standard. Details of conditions, under which a Iicence for the use of the IS1 Certification Mark may be granted to the manufacturers or processors, may be obtained from the Indian Standards Institution.

APPENDIX A ( Clause 0.3 ) :

INFORMATION TO BE SUPPLIED WITH THE ENQUIRY OR ORDER

A-1. The enquiry,or order should state: a) the type and size of shackle; ,b) the type of pins; ,c) the working load; d) heat treatment desired; and e) further tests or chemical analysis, if required.

10

IS :‘6132 ( Part I) - 1971

APPENbIX B ( Clauses 6.3 and 4.2 )

MATERIALS FOR SHACKLES

B-l. Ma~terials suitable for the shackles and shackle pins are as follows :

B-2. GRADE 30 SHACKLES (IS0 EQUIVALENT GRADE L )

B-2.1 The material for grade, 30 shackles and shackle pins shall be one of the following :

a) Steel to designation C 20 of IS: 1570-1961*, b) Steel to class 2 of IS: 1875-19701, c) Steel to grade 2 of IS : 3261-19661.

B-3. GRADE 40 §HACKLES (IS0 EQUIVALENT GRADE M ).

B-3.1 The material for grade 40 shackles and shackle pins shall be one of the following :

a) Steel to designation C25;Mn 75 or 20 Mn 2 of IS : 1570-1961*, b) Steel to class 3A of IS: 1875-1971t, and c) Steel to grade 3 of IS: 3261-1966:.

B-4. GRADE 63 SHACKLES (IS0 EQUIVALENT GRADE S)

B-4.1 The material for grade 63 shackles and shackle pins shall be steel’to designation 17 MnCrE, 13Ni3Crs, 37Si2Mn9_0, 35Mn2Mos, 40CrlIMo2_8 or 35XilCrs to IS : 4367-1967s.

IL5. In addition to the requirements given above the steel shall satisfy the requirements of 4.1, and 4.1.1 regarding tensile strength, aluminium, phosphorus and sulphur contents.

*Schedules for wrought steels for general engineering purposes. TSpecification for carbon steel billets, blooms and slabs for forgings (revised ). fSpecificarion for carbon steel forgings for shipbuilding industry. $Specification for alloy and tool steel forgings for general industrial use.

11

INDIAN STANDARDS

ON

Lifting Chains and Associated Fittings and Components

IS: RS

2429 ( Part I )-1970 Round steel short link chain (electric butt welded ), Grade 30 : Part I Xon-calibrated load chain for lifting purposes ( second revision ) . . . . . . . . *.. . . . 4.00

2429 (Part II )-1950 Round steel short link chain ( electric butt welded ), Grade 30: Part II Calibrated load chain for pulley blocks and other lifting appliances (second revision ) . . . . . . . . . 4.00

2758-1969 Mild steel point hooks for use with wire rope thimbles .., . . . 4.00

2759-1969 Higher tensile steel point hooks for use with wire rope thimbles . . . 4.00

3109 ( Part I)-1970 Round steel link chain (electric butt welded ), Grade 40: Part I Non-calibrated load chain for lifting purposes (firsi r~isiorl J... 4.00

3109 ( Part II)-1970 Round steel link chain ( electric butt welded ), Grade 40: Part II Calibrated load chain for pulley bloc!ts and other lifting Appliances ( jrst revision ) . . . . . . . . . . . . 500

3813-1967 ‘ C’ hooks for use wilh swivels . . . . . . . . . . . . 4.00

3814-1967 Metal arc welded short link, uncalibrated steel chain, Grade 30, for lifting purposes . . . . . . . . . .._ . . . 6.00

38151969 Point hooks with shank for general engineering purposes . . . 5.00

3822-1966 Eye hooks for use with chains . . . . . . . . . . . . 2.00

3832-1966 Hand operated chain pulley blocks . . . . . . . . . 2.50

4164-1967 ‘ C ’ hooks for use with chains . . . . . . . . . . . . 5.00

4178-1967 Eyenuts with collars . . . . . . . . . ._. . . . 400

4190-1967 Eyebolts with collars . . . . . . . . . . . . . . 5.00

4531-1968 Swivels . . . . . . . . . . . . . . . . . . 5.00

5537-1970 Lashing chains . . . . . . . . . . . . . . . 5.00

‘5604-1970 Universal gearless hand operated pulling and lifting machines - . . .

5616-1970 Electric butt welded steel chains for lifting purposes-general condi- tions of acceptance . . . . . . . . . . . . . . . 5'50

5626-1970 .SF;;cke$ype connector units for high tensile steel chain for conveyors . . . . . . . . . . . . . . . . . . 3.50

5629-1970 Mild steel forged triangular lifting eyes . . . . . . . . . 3,50

5729-1970 Treble-swivel Assembly for ships’ u&on purchase . . . . . . 3.50

5749-1970 Forged tamshorn hocks .*. . . . . . . . . . 400