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is.8598.1987

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   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. ! #$%&# '(%) “  ! # $ %& #' ( )* & +#,-.  ” Satyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” “  /0 ) 1 &2 324 #' 5 *)6  ”  Jawaharlal Nehru “Step Out From the Old to the New” “  7 #1     &     8+9& )  ,  7:1     &     8+9& )  ” Mazdoor Kisan Shakti Sangathan “The Right to Information, The Right to Live” “  ! # %& ;< =7 # > 72 &(: ?0 ) @ #AB 7 <&* A     * ” Bhart + hari—N , ti - atakam “Knowledge is such a treasure which cannot be stolen” IS 8598 (1987): Specification for Idlers and Idler Sets forBelt Conveyors [MED 6: Continuous Bulk Conveying,Elevating, Hoisting Aerial Ropeways and Related Equipment]  UDC 621’867’2’051’44 IS:8598-1987 - - 1. th 1. in 2. (1 2. 2. id 3. 3. se Scope - Covers the requirements for carrying and return idlers and idler sets up to and including ree idlers for belt conveyors. 1 It does not cover idlers and idler sets for portable and mobile belt conveyors. Garland, catenary am rpact, and transition idlers are also not covered by this standard. Terminology - Shall be according to IS : 4240-1984 ‘Glossary of conveyor terms and definition ‘irst revision )‘. 1 Troughing Angle ( h ) - Angle of the axis of side idlers from the horizontal. 2 Idler Vertical Clearance (m) - The vertical gap between the periphery of idler and the top of the ler transom or any other structural part, nearest to the idler. Dimensions 1 fdler Diameters (dl ) -The diameters, dl in millimetres, of carrying and return idlers shall b lected from the following: 63’5 76’1 88.9 101’6 108 114’3 127 133 1 1 ) 1 / ) \ 139’7 152’4 159 1 168’3 j 193’7 219’1 _~. Z idler Lengths - Idlers shall have lengths as specified in Tablel. 3 idler Sets - Mounting dimensions for idler sets shall be as specified in Table 2. 3.3.1 Length of carrying idlers - The length of carrying idlers suitable for troughed belt on three ual idlers shall be selected from those given in Table 1. 3.3.2 Slots for bolts - Slots ( SL ) for bolts of diameter D shall be of width D + 2 mm, Min ant mm, Min, long in the longitudinal direction along the length of conveyor (see Fig. in Table 2 ). 3.3.3 Clearance height (m ) - The clearance beneath centre idler for carrying idler sets shall be al eq 26 ven below: Iiameter d,* Ilininiurn 30 .Icarancc rr1t *See 3.1. i_SdC 3.3. ~_ _.. - Adopted 18 December 1987 I 0 September 1988, BIS I Gr 4 Indian Standard SPECIFICATION FOR IDLERS AND IDLER SETS FOR BELT CONVEYORS ( First Revision ) Carrying and Return Idlers Carrying idlers Only All dimensions in millimetres. 76’1 88’9 101’6 108 114’3 127 133 139’7 152’4 159 168‘3 193’7 219’1 - - -- ~ -- ~~~ - _ - 30 30 30 30 ( 30 30 1 40 1 40 ( 40 ) 40 / 40 ~ 50 1 I.313 BUREAU OF INDIAN STANDARDS MANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 ( Reaffirmed 1998 )
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