इंटरनेटमानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न' 5 तरफ” “The Right to Information, The Right to Live” “Step Out From the Old to the New” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru IS 5359 (1987): Sine Bars [PGD 25: Engineering Metrology] “!ान $ एक न' भारत का +नम-ण” Satyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह” है” ह Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” . . 3. When sine bars are made to specifications given in Table 2.The general tolerances as specified in IS : 2102 ( Part 1 )-I 980 ‘General tolerances for dimensions and form and position: Part 1 General tolerances for linear and angular dimensions ( second revision )‘.The main body of sine bar. 2. shall be maintained for dimensions which are not specified in Table 2. Material and Hardness . the nomenclature in Fig. definitions (first revision )‘. of The E = L1 Sin a (see Fig. the axes of rollers. conditions The working surface and rollers shall be hardened to a hardness of not less than 700 HV (60 HRC ) and stabilized.9 BAHADURSHAH ZAFAR MARG NEW DELHI 110002 Gr 3 be 2 pm.8 of IS : 8000 ( Part 1 )-1985.4 Working Surface 4. General Requirements 6. 0 September 1981 chamfered 1988. Terminclogy in this standard is based on IS : 8378-1977 ‘Glossary The following definitions shall apply. BIS I BUREAU OF INDIAN STANDARDS MANAK EHAVAN. attention must be paid to angular uncertainty.The nominal size represents the distance function Standard between of sine bars of nominal sizes 100 to 500 mm. Nomenclature and Terminology . 3.2 Squareness Tolerance - See 14. a zone of 0’5 mm from the 6. used in metrology’. . 6. if required ) shall be made from suitable gauge steel as specified in IS : 7018 ( Part 1 )-I973 ‘Technical supply for gauges:Part 1 General’.2 Flatness error of top surface within Max. 5.For the purpose of this standard. basis For the The angle to be set ( a) is reduced to linear measurement with the help of sine required combination of slip gauges is calculated according to the following formula: of sine range function.1 Flatness Tolerance . A sine bar is a testing device with which angles can be set on the with the help of slip gauges and can be used for testing of taper objects. Scope - Covers the dimensions 2. Main accuracy requirements shall be as given in Table 2.3 Outer and inner edges may be chamfered Adopted 22 December edges shall to 45” x 1 mm.3 Parallelism Tolerance - See 14. Fig. Dimensions - The upper surface of the sine bar constitutes Shall be as given in Table 1 read with the working surface. orientation.1987 ( Reaffirmed 1998 ) Indian SPECIFICATION FOR ( First 1.7 of IS : 8000 ( Part 1 )-1985.See 14.IS : 5359 . 1. 1 and 2 ).1 These sine bars are preferably used for the range of setting angles setting over 45” to 60”. 3. 3. as shown of terms 3. uncertainties as given in Table 3 are to be expected while using the combination of slip gauges of accuracy grade 1 as prescribed in IS : 2984-1981 ‘Specification for slip gauges’. supporting rollers ( and support.2 of IS : 8000 ( Part 1 )-I985 ‘Geometrical tolerancing on technical location and runout and appropriate geometrical drawings:Part 1 Tolerances of form. 0” to 45”. General SINE BARS Revision ) and requirements Note .1 Tolerances and Permissible Deviations . 6. 1 shall apply. and Fig.min. 1. 1 NOMENCLATURE TABLE 1 AND AS PER TYPE A B DIMENSIONS DIMENSIONS OF SINE FOR SINE BARS BARS ( Clause 4. 1 ) All dimensions Nominal Size in millimetres.POSlTlON AND DESIGN OF CLAMPING BORES AS PER CHOICE OF MANUFACTURER FOR SIGN BAR IN OPERATING POSITION SEE FIG.~NTACT SURFACES // MBER.1987 x Y.IS :5359 . 2 TYPE A REMAINING DIMENSIONS TYPE FIG. Diameter Roller LP b L1 h Type A d Tvw B I 20 30 100 120 130 40 20 - 20 30 200 300 25 40-- 230 220 40 20 345 330 50 30 400 25 40 445 430 50 30 500 30 50 555 535 60 35 2 of .--t- CONTACT SURFACES ETr’NG OLLER Imin. SET TING ROLLER \ / Y. 1. 1 ) Nominal 11 Size Parallelism of Roller Axis Diameter I mm Permissible Tolerances mm vm 100 +2 20 200 +4 20 300 +6 30 400 +8 3 30 -- _+I0 3 35 I Rollers I d Permissible Tolerance 500 of +2 Form Tolerance for Rollers Permissible Variation in Sizes of Rollers pm pm 1 1 Parallelism Tolerance of Working Surface to Contact Surface End Faces Parallelism Tolerance to Roller Axis End Faces and Side Faces Perpendicularity Tolerances to Each Other and to Working Surface lym 100 mm 5 pm IOmm 1 pm IOmm . and Fig.TABLE 2 TOLERANCES AND PERMISSIBLE DEVIATIONS ( Clause 6. 6 Methods 7._ I 500 6.IS :5359 . by the type size and the number of this : Sine Bar A 200 IS : 5359 8.5 ) Angular Uncertainty Nominal See also 6.2 Each sine bar shall be supplied in a suitable case. The fitting surfaces shall correspond to the specifications for side and end faces.1 All surfaces of the sine bar shall be well protected during storage by covering with suitable corrosion preventives and transit.*g .5 of IS : 8378-l .I sine bars. Sine bars may be provided with fitting edge. 6. values -The I of angular of testing zt3 I +5 I I 52 +4 It3 I uncertainty +3 bars shall Example +5 be designated +9 xt9 I I +5 I are valid for unstressed IL-10 I I +2 _tll 26 I - 60’ I I l +6 I the sine bars are given in Appendix sine +7 I *4 ) I I I---- -~ ( seconds I 45” I I I I Angles I I I -The for Setting 30” I I Note UNCERTAINTY 1 I 977.1 and 6. strongly the working surfaces and prevent ingress of dust. 8. 6.4 6. The tapped holes for this are to be distributed pairwise symmetrical to the middle clamping bore on side faces and symmetrical on end faces. 2 TEST ASSEMBLY ( SINE BAR IN THE POSITION OF OPERATION ) Construction . TABLE 3 ANGULAR ( Clauses Size L1 15O 100 I +4 200 I *3 300 400 I-. Preservative Treatment 8.The rollers shall be connected rigidly to the sine bar body.5 Angular Uncertainty - Shall be as given in Table 3.1. Designation standard. A. 4 constructed and designed to protect .1987 TEST POINT 1 TEST POINT 2 ATIC ANGLE TING ANGLE GAUGE a /SLIP GAUGE COMBINATION FIG. 2”. If any other distance is . 30” and 45’ are tested. 2 ) Angle 15” 30” 45” 0’8 1’0 1’3 I I 0’7 -I I I I 0’9 I 1’2 I 0’6 0’8 1’2 400 0’6 0’8 1’1 I i 0’5 I 1 ‘1 I Note . 9.1 The upper surface of the prismatic angle block is checked with an instrument for measuring gauging length with a scale of least count q 0’2 cLm with a permissible deviation of the display 1 scale unit between two testing points which are as far as possible from each other. revision )‘.Preferably the angles 15”.IS : 5359 . Marking 9. with accuracy grade 0 as given in IS : 2285-1974 ‘Specification for cast iron surface plates (first The upper surface is checked with an instrument for gauging lengths with scale 0’2 pm.2 The markings shall not interfere with the accuracy be no markings on the working surfaces. A-2. A prismatic angle gauge is put on the upper surface of the sine bar according to test assembly. b) Identification number.3 Standard particulars: Marking - Details available of the working surfaces and as such there shall with the Bureau of Indian Standards.2.1 Each sine bar shall have legibly a) Nominal and permanently marked upon it the following size. 5 I I 0’7 I I I 300 500 2 I I I I POINTS Permissible Difference for Setting ( Theoretical Value ) (pm ) 100 I AT TEST I I I READINGS in Table 4. Nominal Size mm Ll ~- 200 I 1 AND and Fig. The flatness of the upper surface can also be checked interferentially.The values in the table refer to a distance of 40 mm between test points chosen. 9.6 ) A-l.2 The difference TABLE in display 4 between PERMISSIBLE both the points shall not exceed the values given DIFFERENCE IN ( Clause A-2. I 1 and 2. A-2.The test of parallelism includes The contact surface should correspond to the measuring plate ( surface plate ) test of flatness. Setting Angle . when the angle is set. with a permissible deviation of display 1 scale unit that is in accordance with inductive measuring method. only prismatic angle gauge ( no combination ) shall be used for testing.1987 9. An edge zone of 0’5 mm width is not taken into consideration durinq testing. then the values in the table must be proportionately recalculated. correspond to a surface plate with accuracy grade 0 as specified in IS : 2285-1974 with most suitable slip gauge combinations ( maximum five slip gauges ) which corresponds to at least Grade 1 in accordance with IS : 2984-1981. and c) Manufacturer’s name or trade-mark. The angle of the prismatic gauge block should be equal to the theoretical value of the set angle and must not cross the permissible deviations of &. APPENDIX METHODS A OF TESTING ( Clause 6. the The contact surface should A-2. Parallelism of Upper Surface to the Contact Surface . ‘Sine bars in India and Some of the main changes made are listed below: a) Clause on material has been modified to specify suitable gauge steel as per IS : 7018 ( Part 1 )-1973. This revision has been brought out based on the manufacturing practices followed DIN 2273-l 979 ‘Sine bars’. issued by the British Standards Institution. Hardness has also been specified in line with IS : 7018 ( Part 1 )-1983. d) The standard has been restructured based cn DIN 2273-1979.IS : 5359 . issued by the Deustchet lnstitut fiir Normung ( DIN ). a chcice of two widths thus giving a c) Nominal sizes of 400 and 500 mm have also been included. b) Two types of sine bars have been specified to give wider choice to users. 6 Printed at Printrade.1987 EXPLANATORY NOTE This standard was originally published in 1969 based mainly on BS : 3064-1959 and sine tables excluding compound tables’. New Delhi. India .