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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.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 8422-2 (1977): Piston Rings for IC Engines, Part II:Taper Faced Compression Rings from 30 up to 200 mm NominalDiameter M-rings [TED 2: Automotive Primemovers]

UDC 62143-242.3 ( First Reprint AUGUST 1986 ) IS : 8422 (Part II) - 1977 (RedEnmd lss2)

Indian Standard

- -. ----

Is] 1 I

SPEClFlCATION FOR PISTON RINGS FOR IC ENGINES

PART II TAPER FACED COMPRESSION RINGS FROM 30 UP TO 200 mm NOMINAL DIAMETER

M-RINGS

I. Scope- Specifies dimensions, tolerances, tangential loads and other details of M-rings (taper faced :ompression rings) from 30 up to 200 mm nominal diameter for internal combustion engines.

2. Dimensions and Tolerances - Shall be as given in the Table 1 read along with Fig. 1

DETAIL A SHOWING CHAMFERING OF INTERNAL EDGES (KI)

FIG. 1 TAPER FACED COMPRESSION RING (M-RING)

1. Designation - Shall include :

a) Type of ring,

b) Nominal diameter d,,

c) Axial width h,,

tj) Number of this standard,

e) Material symbol,

f) Manufacturing process,

g) Whether inside edges chamfered KI. and

h) Type of coating.

Example:

,C, taper faced compression ring (M-ring) having a nominal diameter d,=90 mm, axial width h,=2.5 mm, made of alloyed cast iron (A4), with inside edges chamfered (KI) and phos- phate coated (P) shall be designated as :

M-Ring 90x2.5 IS: 8422 (Part II) A4 Kl P

Adopted 14 April 1977 I

0 October 1977, IS1 I

Gr 4

INDIAN STANDARDS INSTITUTION MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

TABLE 1 DIMENSIONS AND TANGENTIAL LOADS FOR M-RINGS

(.C/euse 2, and Fip. 1)

(All dimensions in millimetres)

1 - -

Inside I

Radial Wall Diameter Thickness

Axi$ BW;$h

Ill -O*OlO -0.022

Tangential Force A+, in N&20%. for h, Shown in column I Nominal

Diameter

+020 0.15

0

$620 0.20

0

+ 0.20 0.25

0

Chamfering of Inside

Eps

0.2hO.l

I

i d,

I 1 4 81 Tol

1 3

30 32 34

2;:: 1.25 1 .35 31 ,l 1.45

I

32.1 1 .45

ZZ.8 1.5 1.6 35.255 1.6

I 36.6 1 .7 38.5 1.75 40.3 1.85

t-040 -0.15 with a

maximum variation of

0.10 in a ring

I - I

:: 48

41 .2 42.1 ::;5 44 2

I I 1.5 2 2.5

45.8 2.1

47.6 48.5 z5 49.4 2.3

I

(6555.07)

(i-0)

50.4 2.3

50.47 51.3 z5 52.1 2.45 53.1 245

+0.10

,:I?: maximum

variation of 0.15 in a ring

X:8’ ;:; 6.4 8.0

3.9 4.4 4.8

i:f

-

g:; 5.9

g 6,3

a.2 10.2

;:; 10.6 10.5

I 6.7 8.9 11.2

;:; if 11.9 12.2 7.6 10.1 12.6

7.3

7%

72 -

8.3 -

i:; 8.7

9.7 9.66

2:: 10.6

12.1

12%

133

11 .l 10.88 10.7 11.0 11.3 11.6 I 8:

54.9 2.55 55.93 2.55 56.3 2.6 56.8 2.6 57.7 2.65 58.6 2.7

L

I .

9.1

0.210.1 9<

93

9;

iFi 59.5 60.4 2.75

(:;‘“8) 61 61.08 .4 2.8 ;:;

11.9 14.9 12.2 15.2 11.8 11.8 147

$0.20 0.25

0

12.1 15.1 11 .6 12.6 15; 12.58 13.2 16< 12.66 13.1 167

IO.3 -

IO.7 I I 17.8

10-s $020

0.30 A ”

18.4

19;

$98.88)

(ZO4)

(Zi.02)

I 6

-1 62.3 2.85 63.98 2.95 64.1 2.95 64.14 2.95 65.9 3.05 66.82 3.1

7.8 3.1

;: 68.7 3.15 69.6 3.2

(;;‘O) 70.4 3.3 71 .4 3.3

;0.10 -0.20 with a

maximum variation of

0.15 in a ring

1 I.5 1 2 / 2.5

-- ~-

Ui.38) 72 73.3 68 3.95 3.35

(ii.55) 75.65 76.9 75.1 3.55 3.45 3.45 -0.25 $0.10

with a maximum

variation of 0.18 in

w 77.8 3.6

3.6 3.7 3.7 3.7 3.7

15.6 15.2 14.55 15.8 15.3

19.5 19.0

193 -

11.7 Il.4

11; - -

78.88 79.91 80.6

(88.9) I 81 ,5 (88.92) 81.52

a ring

15.3 -

Note 1 - Dimensions wllhln the patenthesis are not vahd for new designs.

Note 2 - For mtermediate sires and uversizes:for rebormg, the dmlellslons arld cildriKkXiStics (other than da) of the next smaller nommal diameter apply,

Note 3 -- Tangential force Ft values in columns 1, 2 and 3 correspond to the values of axial width h, shown in columns 1, 2 and 3.

*Tangential load values are,specified for material A, only [see IS : 5791-I 977 Technical suPPlY conditions for Piston rings for internal combustion engines (first revision)]. For other materials, load factors given rn IS : 5791-1977 shall be used.

(Continued)

TABLE 1 DIMENSIONS AND TANGENTIAL LOADS FOR M-RINGS - Contd

(All dimensions in millimetres)

Nominal Inside Diameter Diameter

& ds

RbJ&lyw&’ Axial Width Closed

I

n$yJg Gap

al Tol -@022 $1

I I I L-l * I 3 I : 84.2 824 3.8 3.9

y8) 84.28 88.1 :::5

91.8 4.2

92.21 93.09 $f

93.4 94.57 i:;

94-75 95.4 44:;

+0.10 -0.26 with a

maximum variation of

0.18 in a ring

% 98.1 4.45

‘:zLs5’ E.95 4::

4.5

I I I 110 100.8

(;::‘18) 101.78 102.8 4:;

114 104.8 44.; (114.3) 104.9 4.7

I !

Chamfering Tangential Force FI*, in N&20?& for of Inside hl Shown in Column

Edges KI 1 2 3

:::t ;::; 24.5 25,4

16< 21.14 21 252

I I I 17.1 21 .4 25.7

172 21.22 21.8 267 18 22.5 27

22.2 - - 22.19 -

0.3*0.15 17.9 22.3

- 21.88 $6.8

-

187 21.82 23.0 27% - 22.19 -

I 17; I 22.07 22.0

I 26;

19.2 24.0 19.5 24.3 9:::

187 23.3 23.26 28;

23.9 28.7 33.5

24; ant 34; 23.6 2814 33.1

- 28.07 -

+@26 940

0

22::; 24.9

116 116 118

29.6 34.6 29.1 33.9 29.8 34.8

Et i:; 108.2 4.9

0.3*0.16

zx 23:6

30.6 36.6 29.6 34.4 28.4 33.1

:z 124

::i 6 6

114 6

I -- 126 126 128

2.6 3 3.6 26.2 31.4 36.7 26.8 30.9 36.1 24.8 29.8 34.8

26.9

26- 26.2

32.3 32.17 31.3 30.2

37.7 -

36.6 36.2

I --

26.1 31.4 26.7 30.9 24.9 29.9

36.6

zz.8

114.6 116.6 ::;

117.6 6.2

130 (;;;‘17)

134

6.6 6.6 6:6

+0.10 -0.26 with a

maximum variation of

0.18 in a ring

136 136 138

+0.26 0.60

0

140 ._ 142

(: EE7)

128.6 130.6 2:;

131.47 132.6 ;:; 0.4kO.16

32.2 31.2

303

37.6

;;f

36.3

146 133.2 6.9 33.1 38.6 44.1 146 134.2

;:; 32.6 38.1 43.6

148 136.2 31.6 36.9 42.1

160 138 162 140 6” 164 142 6

3 3.6 4 E’f 3013

37.6 36.6 36.4

it.7 40.6

166 166 168

142.6 143.6 66:;

145.6 6.2

+0*26 060

0 33’1 38.6 32.6 38.1 31 .7 36.9

160 147.2 6.4 33.9 39.5 46.2 162 149.2 6.4 33 38.4 43.9 164 151.2 6.4 32 37.4 42.7

Note 1 - Dimensions within the parenthesis are not valid for new designs. . . Note 2 - For intermediate sizes and oversizes for reboring, the dimensions and Cnaracteristics (other than d,) of the next smaller nominal diameter apply.

Note 3- Tangential force Ft values in columns 1, 2 and 3 correspond to the values of axial width /I, shown in columns 1, 2 and 3.

*Tangential load values are specified for material A, Only [see IS : materials, load factors given in IS : 5791-l 977 shall be used.

5791-l 977 Technical supply conditions for piston rings for internal combustion engines (first revision)]. For other E;

(Conth3d) Y

TABLE 1 DIMENSIONS AND TANGENTIAL LOADS FOR M-RINGS - Contd

(All dimensions in millimetres)

-

Axial Width of Ring

h, -$;;

Closed Gap

Tangential Force FP, in N&20%. for hi Shown in Column

Nominal Inaide Radial Wall Diameter Diameter thickness

4 4 Jl Tol

Chamfering of Inside

Edges KI

7

162 163 z:; 165 6.5

166.6 168.6 8:; 160.6 6.7

161.2 6.9 162.2 164.2 i:;

165.8 7.1 167.8 7.1 169.8 7.1

170.6 7.2 171.6 7.2 173.6 7.2

175.2 7.4 177.2 7.4 179.2 7.4

180 7.5 181 7.5 183 7.5 184.6 7.7

1

3

2

3.5

4.0

3

4

-

._

_

_

._

.-

._

- -

33.1 44.1 32.7 %

37’ 43.5

31.7 42.3

165 166 168

+0*10 -0.25 with a

maximum variation of

0.18 in a ring

0*60+ @26 0

0.4fO.15

45.2 44 42.8

170 172 174

175 176 178

3.5

it4 38.9

46.2 45.7 44.5

- - -

41 .3 47.2 40.3 46.1 39.3 44.9

m 180 182 184

- - -

so.1 5 -0.30 with a

maximum variation of

0.23 in a ring

$0.25 0.70

0

40.4

::

46.2 45.7 44.5

185 186 188

- 0.650.2 -

-

41 .3 47.2 40.3 46.1 39.4 45

190 192 194

-

t

ii’” 39.1 41.3

46.2 45.7 44.6 47.2

195 196 198 200

-

-

Note 1 - Dimensions within the parenthesis are not valid for new designs.

Note 2 - For intermediate sizes and oversizes for reboring. the dimensions and characteristics (other than d,) of the next smaller nominal diameter apply.

Note 3 - Tangential force Ft values in columns 1, 2 and 3 correspond to the values of axial width hl shown in columns 1, 2 and 3.

*Tangential load values are specified for material Al only [see IS : 5791-l 977 Technical supply conditions for piston rings for internal combustion engines (first revision)]. For other materials, load factors given in IS : 5791-l 977 shall be used.

IS : 9422 (Part II) - 1977

4. General Requirements - Shall be as given in IS : 5791-1977.

5. 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-l 977.

5.1 IS/ CeMication 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-l 977 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. The sizes given within parenthesis are non-preferred and should be avoided.

ln the preparation of this standard assistance has been derived from DIN 70911 ‘Piston rings for automotive engineering, M-rings, taper faced compression rings from 30 up to 200 mm nominal diameter’, issued by Deutscher lnstitut fiir Normung (DIN).

7

aaoduud by RePropmphy Unit. ISI. Now Dolhl