Disclosure to Promote the Right To Information

Transcription

1 इ टरन ट म नक 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. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS (1977): Piston rings for IC engines, Part 8: Narrow land slotted oil control rings from 50 up to 200 mm nominal diameter D-Rings [TED 2: Automotive Primemovers]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

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4 UDC IS : 8422 (Part VIII) Indian Standard SPECIFICATION FOR PISTON RINGS FOR IC ENGINES m 1 I PART VIII NARROW LAND SLOTTED OIL CONTROL RINGS FROM 50 UP TO 200 mm NOMINAL DIAMETER D-RINGS 1. Scope- Specifies the dimensions, tolerances, tangential loads and other details of D-rings (narrow land slotted oil control rings) from 50 up to 200 mm nominal diameter for internal combustion engines, 2. Dimensions and Tolerances - Shall be as given in Table 1 read along with Fig. I. 8 n DETAIL A SHOWING CHAMFERING OF INTERNAL EDGES (~1) All dimensions in millimetres. FIG. 1 NARROW LAND SLOTTED OIL CONTROL RING (D-RING) 2.1 Arrangement of Slots - Shall be according to Fig Designation - Shall include: a) Type of ring ; b) Nominal diameter, 4; c) Axial width, h, ; d) Number of this standard ; e) Material symbol ; f) Manufacturing process; g) Whether internally bevelled (IF); and h) Type of coating. Example: A narrow land slotted oil control ring (D-ring) having nominal diameter d,=90 mm, axial width /7,=5 mm, made of alloyed cast iron (A4) and phosphated on all sides (P) shall be designated as: D-Ring 90 x 5 IS : 8422 (Part VIII) A4 P Adopted 20 June 1977 I 0 August 1976, ISI I Price Rsl.7 \ 8 GP 3. lndlan STANDARDS institutlon MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI

5 TABLE 1 DIMENSIONS AND TANGENTIAL LOADS OF D-RINGS (Clause 2, Fig_ 1 and 2) (All dimensions in millimetres) Uom In- Radial Wall Axial Width Closed Cham- Rad- Land h, Landh, Depth No. Tangen- Dia side Thickness of Ring Gap fering ius for h, for h, of of wlesof tial Dia of Inside Shown in Shown in Groove Slots c1 for hl Force Ft* Edges Shown in in N&20% for h, h, Shown in (I, 4 -~ a, Tol 1 2 Sl KI r a zz IO ~010 o,8+o~lo 0.6-1_0,1 _o, ; II IO.2 11 :; II , E? with a maxi E mum varia tion o , ,8+0, of ;y:; 5:; 67 in a ring ;:;; lf E , ;: ,25&0, * '7 :z:: ;8" ,010 o,25+;.25 o,g+o~lo l&o E , ;;:z :"9:; E with a 0.3&0~ maxi mum 20.5 % varia- :; tion of &OA 87 4 in a a :: ring _ o.olo 6-o.010 o.g+o~lo,*,+@fo * *0.1 &:p 22;:; _- 0.3dzo.07-0*05 "-0.05

6 ~010-0, ~010-0,022 p F3&0* f;:: 30.4 Pzl I ;; ;:; :;:;g with a maximum variation of0.18 in a ring 0,40+0'3c , ,.50+0, I g;

7 TABLE 1 DIMENSIONS AND TANGENTIAL LOADS OF D-RINGS - Contd (All dimensions in millimetres) P Uom Dia I In- Radial Wall Axial Width side Thickness of Ring Dia I I -1-I -~ ?g:;; with a maximum variation of 0.23 in a ring o o ,028-0,028 Edges _.. Note - Tangential force Ft values in col 1 and 2 correspond to the values of axial width hl shown in col 1 and Shown i;l 2*0, in N&20% for hl Shown in * ii:: 5; ; :8, I *Tangential load values are applicable for material Al only [see IS : Technical supply conditions for piston rings for IC engines (firstrevision)]. For other materials load factors given in IS : shall be used.

8 IS : 8422 (Part VIII) / 5x60-6 SiOTS FOR dl UP TO 58mm 8 SLOTS FOR dl=60 TO 104mm ) 10 SLOTS FOR dl=105 TO 138mm 12 SLOTS FOR dl=140 TO 200mm dl Outside Diameter of Cutter d5 Maximum Difference Between W, and W, mm up Io l Above to 75 FIG. 2 ARRANGEMENT OF SLOTS 4. General Requirements - Shall be as given in IS Marking - The rings which are to be fitted in a particular direction shall be marked with the word TOP on the top-sides of the rings. For other markings reference should be made to IS : 5791-I ISI Certification Marking - Details available with the Indian Standards Institution. EXPLANATORY NOTE This Standard is one of the series of Indian Standards on piston ring dimensions, tangential force, etc. IS : 5791 is a necessary adjunct to this standard which gives details of materials, surface finish, gap types and sizes, surface coatings, manufacturing processes, etc. In the preparation of this standard due consideration has been given to the prevalent sizes in the industry. It is recommended that for new designs, only the sizes given in this standard be used. In the preparation of this standard assistance has been derived from DIN Piston rings for automotive engineering, D-rings, narrow land drain oil control rings, 50 up to 200 mm nominal diameter, issued by DIN Deutsches lnstitut fi.ir Normung. 5 Printed at Sree Saraswaty Press Ltd, Calcutta, India