ISO 6622-1:2003

INTERNATIONAL ISO
STANDARD 6622-1
Second edition
2003-12-01

Internal combustion engines — Piston
rings —
Part 1:
Rectangular rings made of cast iron
Moteurs à combustion interne — Segments de piston —
Partie 1: Segments rectangulaires en fonte moulée




Reference number
ISO 6622-1:2003(E)
©
ISO 2003

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ISO 6622-1:2003(E)
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ii © ISO 2003 — All rights reserved

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ISO 6622-1:2003(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Overview . 1
4 Ring types and designation examples. 2
4.1 Type R — Straight faced rectangular ring. 2
4.2 Type B — Barrel faced rectangular ring . 3
4.3 Type BA — Asymmetrical barrel faced rectangular ring h W 1,5 mm. 4
1
4.4 Type M — Taper faced rectangular ring . 5
5 Common features. 6
5.1 Type R — Straight faced rectangular ring. 6
5.2 Type B — Barrel faced rectangular ring . 8
5.3 Type BA — Asymmetrical barrel faced rectangular ring h W 1,5 mm. 9
1
5.4 Type M — Taper faced rectangular ring .10
5.5 Type R, B, BA and M rings (positive twist type) — Internal bevel or internal step top side . 12
5.6 Type M rings (negative twist type), tapers M3 to M5 — Internal bevel or internal step
bottom side. 13
5.7 Type R, B, BA and M rings (positive twist type), and Type M rings (negative twist type) —
Defined twist feature (IFV and IFVU) . 14
5.8 Type R, B and BA rings — Outside chamfered edges (KA). 15
5.9 Type R, B, BA and M rings — Inside chamfered edges (KI) . 15
5.10 Type R, B and BA rings — Outside and inside chamfered edges (KA + KI). 15
5.11 Type R, B, BA and M rings (fully faced, semi-inlaid and inlaid) — Plating/coating
thickness. 17
6 Force factors . 17
7 Dimensions. 18
Bibliography . 30

© ISO 2003 — All rights reserved iii

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ISO 6622-1:2003(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 6622-1 was prepared by Technical Committee ISO/TC 22, Road vehicles.
This second edition cancels and replaces the first edition (ISO 6622-1:1986), which has been technically
revised.
ISO 6622 consists of the following parts, under the general title Internal combustion engines — Piston rings:
— Part 1: Rectangular rings made of cast iron
— Part 2: Rectangular rings made of steel
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ISO 6622-1:2003(E)
Introduction
ISO 6622 is one of a number of series of International Standards dealing with piston rings for reciprocating
[2], [3], [4], [5] [6] [7], [8], [9], [10]
internal combustion engines. Others are ISO 6621 , ISO 6623 , ISO 6624 ,
[11] [12], [13] [14]
ISO 6625 , ISO 6626 and ISO 6627 .
The common features and dimensional tables presented in this part of ISO 6622 constitute a broad range of
variables and, in selecting a particular ring type, the designer must bear in mind the conditions under which it
will be required to operate.
[4]
It is also essential that the designer refer to the specifications and requirements of ISO 6621-3 and
ISO 6621-4 before completing selection.

© ISO 2003 — All rights reserved v

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INTERNATIONAL STANDARD ISO 6622-1:2003(E)

Internal combustion engines — Piston rings —
Part 1:
Rectangular rings made of cast iron
1 Scope
This part of ISO 6622 specifies the essential dimensional features of rectangular rings made of cast iron,
Types R, B, BA and M, having diameters up to and including 200 mm, used in reciprocating internal
combustion piston engines. It is also applicable to piston rings of compressors working under similar
conditions.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 6621-4, Internal combustion engines — Piston rings — Part 4: General specifications
3 Overview
The rectangular ring types are specified in Tables 1 to 3 and Figures 1 to 4. Their common features and the
dimensions of those features are specified in Tables 4 to 8 and Figures 5 to 31. Tables 9 and 10 give the force
factors for the different ring types, while Tables 11 and 12 give the dimensions and forces of rectangular rings
of radial wall thickness regular and D/22, respectively.
© ISO 2003 — All rights reserved 1

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ISO 6622-1:2003(E)
4 Ring types and designation examples
4.1 Type R — Straight faced rectangular ring
4.1.1 General features
See Table 11 or 12 for dimensions and forces.


Key
1 reference plane
a
t = 0,005 × h .
1
Figure 1 — Type R
4.1.2 Designation
EXAMPLE Designation of a piston ring complying with the requirements of ISO 6622-1, being a rectangular ring
made of cast iron, with a straight faced peripheral surface (R), of nominal diameter d = 90 mm (90), of nominal ring width
1
h = 2,5 mm (2,5), made of non heat treated grey cast iron, subclass 12 (MC12), phosphated on all sides (PO):
1
Piston ring ISO 6622-1 R 90 ×××× 2,5 - MC12/PO
2 © ISO 2003 — All rights reserved

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ISO 6622-1:2003(E)
4.2 Type B — Barrel faced rectangular ring
4.2.1 General features
See Table 11 or 12 for dimensions and forces.

Key
1 reference plane
a
See Table 1.
Figure 2 — Type B
Table 1 — Gauge width (h ) and barrel dimensions for symmetrical barrel faced compression rings
8
Dimensions in millimetres
a b c
h h h h tol. h t ,  t h
1 25 26 26 27 2 3 8
1,2 0,30 0,60 0,90 0,003.0,012 0,60
± 0,20
1,5 0,35 0,75 ± 0,25 1,15 0,80
1,75 0,35 0,85 ± 0,30 1,35 1,00
0,003.0,015
2,0 0,40 1,00 1,60 1,20
± 0,30
2,5 0,45 1,25 ± 0,40 2,05 1,60
3,0 0,50 1,50 ± 0,50 2,50 2,00
0,005.0,020
3,5 0,55 1,75 ± 0,50 2,95 2,40
4,0 0,60 2,00 ± 0,60 3,40 2,80
0,005.0,023
4,5 0,65 2,25 3,85 3,20
± 0,60
a
h may be lowered for rings with reduced edge dimensions.
25
b
t and/or t can be changed as agreed between edge dimensions.
2 3
c
Gauge width (h ) only informative; may be used only if agreed between manufacturer and client.
8
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ISO 6622-1:2003(E)
4.2.2 Designation
EXAMPLE Designation of a piston ring complying with the requirements of ISO 6622-1, being a rectangular ring
made of cast iron, with a barrel faced peripheral surface (B), of nominal diameter d = 90 mm (90), of nominal width
1
h = 2,5 mm (2,5), made of heat-treated martensitic spheroidal graphite cast iron, subclass 51 (MC51), with a chromium
1
plated coating on the peripheral surface, and of minimum thickness 0,15 mm (CR3):
Piston ring ISO 6622-1 - B 90 ×× 2,5 - MC51/CR3
××
4.3 Type BA — Asymmetrical barrel faced rectangular ring h W 1,5 mm
1
4.3.1 General features
See Table 11 or 12 for dimensions and forces.

Key
1 reference plane
2 mark
Figure 3 — Type BA
Table 2 — Barrel dimensions
Dimensions in millimetres
a b b
h h h h tol. h t t
1 25 26 26 27 2 3
1,5 0,35 0,50 ± 0,15 1,15 0…0,005 0,007…0,022
1,75 0,35 0,55 1,35 0,008…0,025
± 0,20 0…0,007
2,0 0,40 0,60 1,50 0,009…0,030
2,5 0,45 0,70 1,80 0,011…0,035
± 0,25 0…0,008
3,0 0,55 0,80 2,10 0,012…0,038
3,5 0,60 0,90 2,40 0,012…0,040
± 0,30 0…0,009
4,0 0,65 0,95 2,80 0,013. 0,045
4,5 0,70 1,05 ± 0,35 3,20 0…0,010 0,015. 0,050
a
h may be lowered for rings with reduced edge dimensions.
25
b
t and/or t may be varied as agreed between manufacturer and client.
2 3
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ISO 6622-1:2003(E)
4.3.2 Designation
EXAMPLE Designation of a piston ring complying with the requirements of ISO 6622-1, being a rectangular ring
made of cast iron, with an asymmetrical barrel faced peripheral surface (BA), of nominal diameter d = 90 mm (90), of
1
nominal width h = 2,5 mm (2,5), made of heat-treated martensitic spheroidal graphite cast iron subclass 51 (MC51), and
1
having a chromium plated coating on the peripheral surface with a minimum thickness of 0,15 mm (CR3):
Piston ring ISO 6622-1 BA 90 ×××× 2,5 - MC51/CR3
4.4 Type M — Taper faced rectangular ring
4.4.1 General features
See Table 11 or 12 for dimensions and forces.

Key
1 reference plane
2 mark
Figure 4 — Type M
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ISO 6622-1:2003(E)
Table 3 — Taper
Dimensions in minutes
Uncoated rings with peripheral surface turned and chromium plated or spray coated rings with
a
peripheral surface ground and chromium plated rings with surface not ground
Code
b b, c
with IF or IW (top side) with IFU or IWU (bottom side)
Taper Tolerance
d
Taper Tolerance Taper Tolerance
+40
c
10 10 — —
M1
0
M2 30 30 — —
+60

0
M3 60 60 60
+50

0
+60

M4 90 90 90
0
M5 120 120 120
a
For chromium plated rings with tapered peripheral surface not ground, the tolerance shall be increased by 10
+60 +70
(e.g. M3 = 60: for M rings or for M rings with IF or IW and IFU or IWU).
0 0
b
IF and IW, and IFU and IWU, are explained in Figures 22 to 25.
c
M1 should not be used for rings of width < 1,5 mm or for those with a partly cylindrical peripheral surface.
d
For M rings (negative twist type) M3, M4 and M5, the twist angle should not exceed 90 % of the minimum taper angle.

4.4.2 Designation
EXAMPLE Designation of a piston ring complying with the requirements of ISO 6622-1, being a rectangular ring
made of cast iron, with a 10’ taper faced peripheral surface (M1), of diameter d = 90 mm (90), of nominal width
1
h = 2,5 mm (2,5), made of heat treated grey cast iron, subclass 23 (MC23) and having an inlaid spray coating on the
1
peripheral surface with a minimum thickness of 0,1 mm (SC2F):
Piston ring ISO 6622-1 M1 90 ×××× 2,5 - MC23/SC2F
5 Common features
5.1 Type R — Straight faced rectangular ring
5.1.1 Uncoated rings

Key
1 mark
Figure 5 — Uncoated Type R rings
6 © ISO 2003 — All rights reserved

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ISO 6622-1:2003(E)
5.1.2 Chromium plated or spray coated rings
5.1.2.1 Fully faced

Key
1 mark
Figure 6 — Fully faced Type R rings

5.1.2.2 Semi-inlaid

Key
1 mark
Figure 7 — Semi-inlaid Type R rings

5.1.2.3 Inlaid (inlaid chrome not recommended)

Key
1 mark
Figure 8 — Inlaid Type R rings
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ISO 6622-1:2003(E)
5.2 Type B — Barrel faced rectangular ring
5.2.1 Uncoated rings

Key
1 mark
Figure 9 — Uncoated Type B rings

5.2.2 Chromium plated or spray coated rings
5.2.2.1 Fully faced

Key
1 mark
Figure 10 — Fully faced Type B rings

5.2.2.2 Semi-inlaid

Key
1 mark
Figure 11 — Semi-inlaid Type B rings
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ISO 6622-1:2003(E)
5.2.2.3 Inlaid (inlaid chrome not recommended)

Key
1 mark
Figure 12 — Inlaid Type B rings

5.3 Type BA — Asymmetrical barrel faced rectangular ring h W 1,5 mm
1
5.3.1 Uncoated rings

Key
1 mark
Figure 13 — Uncoated Type BA rings

5.3.2 Chromium plated or spray coated rings
5.3.2.1 Fully faced

Key
1 mark
Figure 14 — Fully faced Type BA rings

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ISO 6622-1:2003(E)
5.3.2.2 Semi-inlaid

Key
1 mark
Figure 15 — Semi-inlaid Type BA rings

5.3.2.3 Inlaid (inlaid chrome not recommended)

Key
1 mark
Figure 16 — Inlaid Type BA rings

5.4 Type M — Taper faced rectangular ring
5.4.1 Fully tapered
5.4.1.1 Uncoated rings

Key
1 mark
Figure 17 — Uncoated Type M rings

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ISO 6622-1:2003(E)
5.4.1.2 Chromium plated or spray coated rings
5.4.1.2.1 Fully faced

Key
1 mark
Figure 18 — Fully faced Type M rings
5.4.1.2.2 Semi-inlaid

Key
1 mark
Figure 19 — Semi-inlaid Type M rings
5.4.1.2.3 Inlaid (inlaid chrome not recommended)

Key
1 mark
Figure 20 — Inlaid Type M rings
5.4.2 Taper faced rectangular ring with partly cylindrical machined (LM) or lapped (LP) peripheral
surface

Key
1 mark
Figure 21 — Partly cylindrical machined or lapped Type M rings
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ISO 6622-1:2003(E)
Table 4 — Axial dimensions of the cylindrical part of peripheral surface h
24
Dimensions in millimetres
a
h h h
1 24 24
max. max.
each side of gap up to 30°
1,2 0,4 0,8
1,5 0,5 1,0
1,75 0,6 1,2
2,0 0,7 1,4
2,5 0,8 1,6
3,0 1,0 2,0
3,5 1,2 2,3
4,0 1,3 2,6
4,5 1,5 3,0
a
Partly cylindrical peripheral surface shall be visible.

5.5 Type R, B, BA and M rings (positive twist type) — Internal bevel or internal step top side
Dimensions in millimetres

Figure 22 — Internal bevel top side (IF)

Dimensions in millimetres

Figure 23 — Internal step top side (IW)
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ISO 6622-1:2003(E)
5.6 Type M rings (negative twist type), tapers M3 to M5 — Internal bevel or internal step
bottom side
Dimensions in millimetres

a
See Table 3.
Figure 24 — Internal bevel bottom side (IFU)

Dimensions in millimetres

a
See Table 3.
Figure 25 — Internal step bottom side (IWU)

Table 5 — a , h and h dimensions for rings h < 1,5 mm
3 18 19 1
Dimensions in millimetres
a
a h , h
3 18 19
d
1
Tolerance Tolerance
0 0
30 u d < 60 0,85 × a 0,6 × h
1 1 1
−0,2 −0,25

0 0
60 u d u 90
0,9 × a 0,6 × h
1
1 −0,3 1 −0,25

a
Dimension does not apply for IF and IFU rings because h is specified for this
19
feature.
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ISO 6622-1:2003(E)
Table 6 — a and h dimensions for rings h W 1,5mm
3 18 1
Dimensions in millimetres
a h
3 18
d
1
Tolerance Tolerance
0 0
30 u d < 80 0,8 × a 0,6 × h

1 1 1
−0,2 −0,25

0 0
80 u d < 100 0,8 × a 0,6 × h

1 1 1
−0,3 −0,25

0 0
100 u d < 150 0,8 × a 0,6 × h
1 1 1
−0,3 −0,35

0 0
150 u d u 200
0,8 × a 0,6 × h
1
1 −0,4 1 −0,45

5.7 Type R, B, BA and M rings (positive twist type), and Type M rings (negative twist
type) — Defined twist feature (IFV and IFVU)
When the standard twist of 0,01/0,05 for rings u 2 mm axial width and 0,01/0,04 for rings > 2 mm axial width
per 2 mm of radial ring thickness is specified, the dimension a , the angle ϕ and the width of the bevel are at
x
the discretion of the manufacturer. In such cases, the design should correspond to one or the other of the
designs shown in Figure 26.
Dimensions in millimetres


a)  Positive twist type (IFV) b)  Negative twist type (IFVU)
a
See Table 3.
Figure 26 — Variable internal bevel
14 © ISO 2003 — All rights reserved

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ISO 6622-1:2003(E)
5.8 Type R, B and BA rings — Outside chamfered edges (KA)
NOTE KA applies to uncoated rings only.

a)  R rings b)  B rings c)  BA rings
Key
1 mark
Figure 27 — Outside chamfered edges

5.9 Type R, B, BA and M rings — Inside chamfered edges (KI)

a)  R rings b)  B rings c)  BA rings d)  M rings
Key
1 mark
Figure 28 — Inside chamfered edges (KI)

5.10 Type R, B and BA rings — Outside and inside chamfered edges (KA + KI)
NOTE KA applies to uncoated rings only.

a)  R rings b)  B rings c)  BA rings
Key
1 mark
Figure 29 — Outside and inside chamfered edges (KA + KI)
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ISO 6622-1:2003(E)
Dimensions in millimetres

a)  For nominal KA W 0,3 b)  For nominal KA < 0,3

c)  For nominal KI W 0,3 d)  For nominal KI < 0,3
Figure 30 — Details of Figures 27, 28 and 29

Table 7 — KA and KI dimensions
Dimensions in millimetres
d KA KI
1
30 u d < 50 u 0,2 u 0,2
1
50 u d < 125 0,3 × 0,1 0,3 × 0,15
1
125 u d < 175 0,4 × 0,1 0,4 × 0,15
1
175 u d u 200 0,5 × 0,1 0,6 × 0,20
1
16 © ISO 2003 — All rights reserved

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ISO 6622-1:2003(E)
5.11 Type R, B, BA and M rings (fully faced, semi-inlaid and inlaid) — Plating/coating
thickness

a)  Fully faced b)  Semi-inlaid c)  Inlaid
Figure 31 — Plating/coating thickness

Table 8 — Plating/coating thickness
Dimensions in millimetres
Chromium plating Spray coating Thickness
code code min.
CRF — 0,005
CR1 SC1 0,05
CR2 SC2 0,1
a a
CR3 SC3 0,15
a a
0,2
CR4 SC4
a
Not recommended for rings h u 1,2.
1

6 Force factors
The tangential and diametral forces given in Tables 11 and 12 shall be corrected when additional features
2
and/or materials other than grey cast iron with a modulus of elasticity of 100 GN/m are being used. For
common features, the multiplier correction factors given in Tables 9 and 10 and the force correction factors
given in ISO 6621-4 shall be used. The factors of Table 10 have been calculated with mean plating/coating
thickness.
Table 9 — Force correction factors for R, B, BA and M rings with features KA, KI, IF, IW, IFU and IWU
Factor
d
1
 Taper
mm
KA KI M2 or M3 M4 or IF IW
M5 IFU IWU
30 u d < 50
1 1 0,97 0,93 0,88 0,75
1
50 u d < 200
0,97 0,97 0,98 0,96 0,88 0,78
1

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ISO 6622-1:2003(E)
Table 10 — Force correction factors for chromium plated or spray coated R, B, BA and M rings (fully
faced, semi-inlaid and inlaid types)
d Factor
1
mm
CRF CR1 CR2/SC1 CR3/SC2 CR4/SC3 SC4
30 u d < 50
1 0,81 0,70 0,64 — —
1
50 u d < 75
1 0,90 0,85 0,81 0,75 0,71
1
75 u d < 100
1 0,92 0,88 0,85 0,81 0,77
1
100 u d < 125
1 0,94 0,91 0,88 0,86 0,83
1
125 u d < 150
1 0,95 0,92 0,90 0,88 0,85
1
150 u d u 200
1 0,96 0,93 0,91 0,89 0,87
1

7 Dimensions
See Tables 11 and 12.

18 © ISO 2003 — All rights reserved

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ISO 6622-1:2003(E)
© ISO 2003 — All rights reserved 19

Table 11 — Dimensions of R, B, BA and M rectangular rings — Radial wall thickness “regular”
Dimensions in millimetres
Nominal Radial wall Ring width Closed gap Tangential force Diametral force
diameter thickness “regular”
d a h s F F
1 1 1 1 t d
N N
 Tolerance Column Tolerance Tolerance For h shown in column Tolerance For h shown in column Tolerance
1 1
  1 2 3 4 5  1 2 3 4 5 1 2 3 4 5
30 1,25 6,0 7,5 8,6 9,9 12,5
31 1,30 6,2 8,0 9,2 10,5 13,1
32 1,35 6,7 8,2 9,7 11,0 13,8
33 1,40 6,9 8,6 10,1 11,6 14,6
34 1,40 6,5 8,2 9,5 11,0 13,8
35 1,45 6,9 8,6 10,1 11,4 14,4
36 1,50 7,1 9,0 10,5 12,0 15,1
37 1,55 7,5 9,5 11,0 12,7 15,7
38 1,60 7,7 9,9 11,4 13,1 16,6
39 1,65 8,2 10,3 12,0 13,8 17,2
— — — — —
40 1,65 −0,010 7,7 9,7 11,4 13,1 16,3

−0,025
± 0,15
± 30 % if ± 30 % if
41 1,70 8,2 10,1 11,8 13,5 17,0
For
F < 10 N F < 21,5 N
Within
t d
+0,2

42 1,75 1,2 1,5 1,75 2 2,5 phosphated 0,15 8,4 10,5 12,3 14,2 17,6
0
a ring: ± 20 % if ± 20 % if
PO surface:
43 1,80 8,8 11,0 12,9 14,6 18,3
F W 10 N F W 21,5 N
−0,005
t d
0,15 max.

−0,025
44 1,85 9,0 11,4 13,3 15,3 19,1
45 1,90 9,2 11,8 13,8 15,7 19,6
46 1,90 9,0 11,2 13,1 15,1 18,7
47 1,95 9,2 11,6 13,5 15,5 19,4
48 2,00 9,7 12,0 14,0 16,1 20,2
49 2,05 9,9 12,5 14,6 16,6 20,9
50 2,10 4,8 6,0 7,0 8,0 10,0 10,3 12,9 15,1 17,2 21,5
51 2,15 4,9 6,2 7,2 8,3 10,3 10,5 13,3 15,5 17,8 22,1
52 2,15 4,7 5,9 6,9 7,9 9,9 10,1 12,7 14,8 17,0 21,3
53 2,20 4,9 6,1 7,2 8,2 10,3 10,5 13,1 15,5 17,6 22,1
54 2,25 5,0 6,3 7,4 8,5 10,6 10,8 13,5 15,9 18,3 22,8

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ISO 6622-1:2003(E)
20 © ISO 2003 — All rights reserved

Table 11 (continued)
Dimensions in millimetres
Nominal Radial wall Ring width Closed gap Tangential force Diametral force
diameter thickness “regular”
d a h s F F
1 1 1 1 t d
N N
 Tolerance Column Tolerance Tolerance For h shown in column Tolerance For h shown in column Tolerance
1 1
  1 2 3 4 5  1 2 3 4 5 1 2 3 4 5
55 2,30 5,2 6,5 7,6 8,7 10,9 11,2 14,0 16,3 18,7 23,4
−0,010

−0,025
56 2,35 5,4 6,7 7,8 9,0 11,2 11,6 14,4 16,8 19,4 24,1
For
57 2,40 phosphated 0,15 5,5 6,9 8,1 9,2 11,6 11,8 14,8 17,4 19,8 24,9
PO surface:
58 2,40 5,3 6,7 7,8 8,9 11,2 11,4 14,4 16,8 19,1 24,1
−0,005

−0,025
59 2,45 5,5 6,9 8,0 9,2 11,5 11,8 14,8 17,2 19,8 24,7
60 2,50 5,6 7,0 8,2 9,4 11,7 12,0 15,1 17,6 20,2 25,2
61 2,55 5,7 7,2 8,4 9,6 12,1 12,3 15,5 18,1 20,6 26,0
62 2,60 5,9 7,4 8,6 9,9 12,4 12,7 15,9 18,5 21,3 26,7
63 2,65 6,1 7,6 8,9 10,1 12,7 13,1 16,3 19,1 21,7 27,3
64 2,65 5,9 7,3 8,6 9,8 12,3 12,7 15,7 18,5 21,1 26,4
+0,2

0
65 2,70 6,0 7,5 8,8 10,1 12,6 12,9 16,1 18,9 21,7 27,1
± 0,15
± 30 % if ± 30 % if
66 2,75 6,2 7,7 9,0 10,3 12,9 13,3 16,6 19,4 22,1 27,7
F < 10 N F < 21,5 N
Within
t d
1,2 1,5 1,75 2 2,5
0,2
67 2,80 6,3 7,9 9,3 10,6 13,3 13,3 17,0 20,0 22,8 28,6
a ring: ± 20 % if ± 20 % if
−0,010

68 2,85 −0,030 6,5 8,1 9,5 10,9 13,6 14,0 17,4 20,4 23,4 29,2
F W 10 N F W 21,5 N
0,15 max. t d
For
69 2,90 6,6 8,3 9,7 11,1 13,9 14,2 17,8 20,9 23,9 29,9
phosphated
70 2,90 6,4 8,1 9,4 10,8 13,5 13,8 17,4 20,2 23,2 29,0
PO surface:
−0,005

71 2,95 6,6 8,3 9,7 11,1 13,8 14,2 17,8 20,9 23,9 29,7
−0,030
72 3,00 6,7 8,5 9,9 11,3 14,2 14,4 18,3 21,3 24,3 30,5
73 3,05 6,9 8,6 10,1 11,6 14,5 14,8 18,5 21,7 24,9 31,2
74 3,10 7,1 8,8 10,3 11,8 14,8 15,3 18,9 22,1 25,4 31,8
75 3,15 7,2 9,0 10,5 12,0 15,1 15,5 19,4 22,6 25,8 32,5
76 3,15 7,0 8,8 10,2 11,7 14,7 15,1 18,9 21,9 25,2 31,6
+0,25

77 3,20 0,25 7,1 8,9 10,5 12,0 15,0 15,3 19,1 22,6 25,8 32,3
0
78 3,25 7,3 9,1 10,7 12,2 15,3 15,7 19,6 23,0 26,2 32,9
79 3,30 7,4 9,3 10,9 12,5 15,6 15,9 20,0 23,4 26,9 33,5

---------------------- Page: 25 ----------------------
ISO 6622-1:2003(E)
© ISO 2003 — All rights reserved 21

Table 11 (continued)
Dimensions in millimetres
Nominal Radial wall Ring width Closed gap Tangential force Diametral force
diameter thickness “regular”
d a h s F F
1 1 1 1 t d
N N
 Tolerance Column Tolerance Tolerance For h shown in column Tolerance For h shown in column Tolerance
1 1
  1 2 3 4 5  1 2 3 4 5 1 2 3 4 5
80 3,35 7,6 9,5 11,1 12,7 16,0 16,3 20,4 23,9 27,3 34,4
81 3,40 7,8 9,7 11,4 13,0 16,3 16,8 20,9 24,5 28,0 35,0
82 3,40 7,6 9,5 11,1 12,7 15,9 16,3 20,4 23,9 27,3 34,2
83 3,45 7,7 9,7 11,3 12,9 16,2 16,6 20,9 24,3 27,7 34,8
84 3,50 7,9 9,9 11,5 13,2 16,5 17,0 21,3 24,7 28,4 35,5
1,2 1,5 1,75 2 2,5 0,25
85 3,55 8,0 10,1 11,8 13,5 16,8 17,2 21,7 25,4 29,0 36,1
86 3,60 8,2 10,3 12,0 13,7 17,2 17,6 22,1 25,8 29,5 37,0
87 3,65 8,3 10,4 12,2 14,0 17,5 17,8 22,4 26,2 30,1 37,6
−0,010

88 3,65 ± 0,15 −0,030 8,1 10,2 11,9 13,6 17,1 17,4 21,9 25,6 29,2 36,8
For
89 3,70 Within 8,3 10,4 12,2 13,9 17,4 17,8 22,4 26,2 29,9 37,4
phosphated
a ring:
90 3,75 12,3 14,1 17,6 21,2 26,4 30,3 37,8 45,6
PO surface:
± 30 % if ± 30 % if
−0,005
0,15 max.
91 3,80 12,5 14,3 18,0 21,6 26,9 30,7 38,7 46,4
−0,030 F < 10 N F < 21,5 N
t d
+0,25

92 3,85 0 12,8 14,6 18,3 22,0 27,5 31,4 39,3 47,3
± 20 % if ± 20 % if
93 3,90 13,0 14,9 18,6 22,4 F W 10 N 28,0 32,0 40,0 48,2 F W 21,5 N
t d
94 3,90 12,7 14,5 18,2 21,9 27,3 31,2 39,1 47,1
1,75 2 2,5 3
95 3,95 12,9 14,8 18,5 22,3 27,7 31,8 39,8 47,9
96 4,00 13,2 15,1 18,8 22,6 28,4 32,5 40,4 48,6
— 0,3 — —
97 4,05 13,4 15,3 19,2 23,0 28,8 32,9 41,3 49,5
98 4,10 13,6 15,6 19,5 23,4 29,2 33,5 41,9 50,3
99 4,15 13,8 15,8 19,8 23,8 29,7 34,0 42,6 51,2
100 4,15 −0,010 15,5 19,4 23,3 33,3 41,7 50,1

± 0,20 −0,030
101 4,20 15,7 19,7 23,7 33,8 42,4 51,0
For
Within
— 2 2,5 3 — —
102 4,25 phosphated 16,0 20,0 24,0 34,4 43,0 51,6
a ring:
PO surface:
103 4,25 16,2 20,3 24,4 34,8 43,6 52,5
0
0,20 max.

−0,030
104 4,30 15,9 19,9 23,9 34,2 42,8 51,4

---------------------- Page: 26 ----------------------
ISO 6622-1:2003(E)
22 © ISO 2003 — All rights reserved

Table 11 (continued)
Dimensions in millimetres
Nominal Radial wall Ring width Closed gap Tangential force Diametral force
diameter thickness “regular”
d a h s F F
1 1 1 1 t d
N N
 Tolerance Column Tolerance Tolerance For h shown in column Tolerance For h shown in column Tolerance
1 1
  1 2 3 4 5  1 2 3 4 5 1 2 3 4 5
105 4,35 16,1 20,1 24,2 34,6 43,2 52,0
106 4,40 16,3 20,4 24,6 35,0 43,9 52,9
107 4,40 2 2,5 3 0,3 16,0 20,0 24,1 34,4 43,0 51,8
108 4,45 16,2 20,3 24,4 34,8 43,6 52,5
109 4,50 16,4 20,6 24,8 35,3 44,3 53,3
110 4,55 20,8 25,0 29,2 44,7 53,8 62,8
111 4,55 20,4 24,5 28,6 43,9 52,7 61,5
112 4,
...