GOST 1855-55
STATE STANDARD
CASTINGS MADE OF GREY CAST IRON
THE PERMISSIBLE DEVIATIONS IN SIZES AND WEIGHT AND MACHINING ALLOWANCES
GOST 1855−55
Edition official
The STATE COMMITTEE of STANDARDS of the COUNCIL of Ministers of the USSR Moscow
UDC 669.162Д75, M4:621.747 (083.74) Group В81
NATIONAL STANDARD FOR SOYBEANS SSR
CASTINGS MADE OF GREY CAST IRON
The permissible deviations in sizes and weight and machining allowances
GOST
1855−55
Instead, GOST 1855−45
Approved by the Committee of standards, measures and measuring devices under Council of Ministers of the USSR of 10 August 1955, the validity Period is set
with 01,01. 1956 to Q1.01. 1981
Non-compliance is punishable by law
1. This standard specifies three classes of manufacturing precision castings made of grey (including those modified) of cast iron and respectively three (class allowances on their mechanical processing, as well as the permissible deviations by mass.
2. The accuracy class is indicated in the drawing, casting (or drawing parts foundry in technological development) depending on the requirements of the part;, with various (classes of accuracy for different sizes of the same casting
I. PERMISSIBLE DEVIATIONS ON DIMENSIONS of CASTINGS
3. Permissible deviations on dimensions of the casting as a variable and not izmenyay machining set table. 1, 2 and 3 and the permissible deviations in the thickness of uncultivated walls and edges of the table. 4.
Note. Deviations in sizes and weight unique and for the first time mastering the casting is allowed to set by agreement of the parties.
Permissible deviations on dimensions of the casting class I accuracy
mm table!
| The greatest overall dimension of the casting | Nominal | size | |||||||
| up to 30 | over 50 | SV 120 to 260 | SV 260 to 500 | SV 500 to 800 | St. 800 [SV 12501 1250 to 2000 | St. 2000 to 3150 | -3150 u 5000 | ||
| Up to 120 | ±0,2 | ±0,3 | |||||||
| SV. 120 to 260 | ±0,3 | ±0,4 | ±0,6 | ||||||
| SV. 260 to 500 | ±0,4 | ±0,6 | ±0,8 | ±1,0 | |||||
| SV. 500 up to 1250 | ±0,6 | ±0,8 | ±1,0 | ±12 | ±4,4 | ±1,6 | |||
| SV. 1260 to 3150 | ±0,8 | ±1,0 | ±1,2 | ±>1,4 | ±1,6 | ±2,0 | ±2,5 | ±3,0 | |
| SV. 3150 up to 5000 | ±1.0 | ±1,2 | = 1,6 | ±1,8 | ±2,0 | ±2,5 | ±0,0 | ±4,0 | ±5,0 |
Official edition Reprinting is prohibited
Reprinting. August 1977
© Standards publishing house, 1978
Permissible deviations on dimensions of the casting II class of accuracy
mm table 2
| The greatest overall dimension of the casting | Nominal size | |||||||||
| доД50 | over 50 up to 120 | si. 120 to 260 | St. 260 to 500 | over 500 to 800 | St. 800 to 1250 | St. 1250 to 2000 | St. 2000 to 3150 | SV 3150 to 5000 | St. 5000 to 6300 | |
| To 260 | ±0,5 | ±0,8 | ±1,0 | |||||||
| SV. 260 to 500 | ±0,8 | ±1,0 | ±1,2 | ±1,5 | ||||||
| SV. 500 and 1−250 | ±1,0 | ±1,2 | ±1,5 | ±2,0 | ±2,5 | ±3,0 | ||||
| With V. 1 (260 to 3150 | ±3,2 | ±1,5 | ±2,0 | ±2,5 | ±3,0 | ±4,0 | ±5,0 | ±6,0 | ||
| SV. 3150 to 6300 | ±1;5 | ±1,8 | ±2,2 | ±3,0 | ±4,0 | ±5,0 | ±6 0 | ±70 | ±9,0 | ±12 |
Permissible deviations in dimensions of castings ø accuracy class
mm table 3
Nominal size
| The greatest overall dimension of the casting | up to 50 | with V. 50 to 120 | St 120 to 260 | St. 260 to 500 | over 500 to 800 | St. 800 to 1250 | St. 1250 to 2000 | SV 2000 to 3150 | with V. 31оО to 5000 | St. 5000 to 6300 | St. 6300 to 10000 |
| Up to 500 | ±1,0 | ±1,5 | ±2,0 | ±2,5 | |||||||
| SV. 500 up to 1250 | ±1,2 | ±1,8 | ±2D | ±3,0 | ±4*0 | ±5,0 | |||||
| SV. 1250 to 3150 | ±1,5 | ±2,0 | ±2,5 | ±3.5 | ±(5,0 | ±6,0 | ±7,0 | ± h 0 | |||
| SV. 3150 to 6300 | ±0,8 | ±2,2 | ±3,0 | ±4,0 | ±5,5 | ±6,5 | ±8,0 | ±10 | ±12 | ±15 | |
| SV. 6000 to 10000 | ±2,0 | ±2,5 | ±3,5 | ±4,5 | ±6,0 | ±17,5 | ±9,0 | t m | ±14 | ±17 | ±20 |
To"
GOST 1855-JS Page.
The permissible deviations in thickness of the walls and edges
Table 4
mm
| The greatest overall dimension of the casting | The thickness of the untreated wall of the rib Il | Accuracy class I ] and W Tolerance | ||
| Up to 500 | To 6 | ±0,2 | ±0,4 | ±0,8 |
| SV. 6 to 10 | ±0,3 | ±•0,5 | ±1,0 | |
| SV. 10 to 18 | ±0,5 | ±0,8 | ±1,5 | |
| SV. 18 to 30 | ±0,8 | ±1,0 | ±1,5 | |
| SV. 30 to 50 | ±0,8 | ±1,2 | ±2,0 | |
| SV. 50 to 80 | ±1,0 | ±1,5 | ±2,5 | |
| SV. 80 to 120 | ±1,0 | ±1,8 | ±2,5 | |
| SV. 500 up to 1250 | To Th | ±od | ±0,8 | ±1,2 |
| SV. 10 to 18 | ±0,5 | ±1,2 | ±1,5 | |
| SV. 18 to 30 | ±0,8 | ±1,5 | ±2,0 | |
| With V. 30 to 50 | ±1,0 | ±1,8 | ±2,0 | |
| With V. 50 to 80 | ±1,2 | ±2,0 | ±2,5 | |
| SV. 80 to 120 | ±1,5 | ±2,5 | ±3,0 | |
| SV. 1250 to 2500 | To 10 | ±0,5 | ±1,2 | ± 1,5 |
| SV. 10 to 18 | ±0,8 | ±1,5 | ±2,0 | |
| SV. 18 to 30 | ±1,0 | ±2,0 | ±2,5 | |
| With V. 30 to 50 | ±1,2 | ±2,5 | ±3,0 | |
| SV. 50 to 80 | ±1.8 | ±2,5 | ±3,0 | |
| SV. 80 to 120 | ±2,0 | ±3,0 | ±3,5 | |
| SV. 2500 to 4000 | To 18 | ±1,0 | ±1,5 | ±'2,0 |
| SV. 18 to 30 | ±1,2 | ±2,0 | ±2,5 | |
| With V. 30 to 50 | ±1,5 | ±2,5 | ±3,0 | |
| SV. 50 to 80 | ±2,0 | ±3,0 | ±3,5 | |
| SV. 80 to 120 | ±2,5 | ±3,5 | ±4,0 | |
mm
Extension table 4
| The greatest overall dimension of the casting | The thickness of the machined walls or ribs | Accuracy class | ||
| 1 | II | W | ||
| Tolerance | ||||
| SV. 4000 | To 18 | ±2,0 | ±3,0 | |
| SV. 18 to 30 | ±2,5 | ±3,5 | ||
| SV. 30 to 50 | ±3,0 | ±4,0 | ||
| SV. 50 to 80 | ±3,5 | ±4,5 | ||
| SV. 80 to 120 | ±4,0 | ± 5,0 | ||
Notes:
1. Local increase or decrease of the thickness of the machined walls or ribs of the casting are specified in the technical specifications.
2. At the request of the consumer may be increased to lower variance by reducing the top.
II.ALLOWANCES FOR MACHINING CASTINGS
4. The allowance for machining castings is the metal layer (on the side), intended for withdrawal in the 'machining process.
5. The machining allowances castings are set in accordance with accuracy class of their manufacture:
a) casting class I — tab. 5,
b) casting II class — table. 6,
C) casting class III — tab. 7.
By agreement of the parties is allowed to reduce the machining allowances shown in the tables, to the minimum necessary.
6. Under nominal size for establishing machining allowances you should understand the greatest distance between the opposing machined surfaces or the distance from the reference surface or axis (as indicated in the drawing of the casting or part) to the work surface.
7. Allowances that compensate for the warping, smoothing of the local recesses, protrusions and overlaps, creating a directional solidification 'of metal shall be installed by the manufacturer.
8. For machining cast atverti should be taken allowances from the table. 5, 6 and 7 (top or bottom, regardless of the location of the holes).
Str. 5 GOST 1355−5 $
The machining allowances casting class 1
| The highest overall size of the part | The position of the surface when pouring | Nominal size | ||||||||||||
on to on <=[ |
over 50 up to 120 | St. 120 f to 260 |
St. 260 to 500 | 88 123 OO £Y O U |
St. 800 to 1250 | 8g ^ o and Y O U |
St. 2000 to 3150 | St. 3150 to 5000 | ||||||
| To | 120 | Top | 2,5 | 2,5 | ||||||||||
| The bottom | side | 2,0 | 2,0 | |||||||||||
| SV. | t | TO | 260 | Top | 2,5 | 3,0 | 3,0 | |||||||
| The bottom | side | 2,0 | 2,5 | 2,5 | ||||||||||
| SV. | 360 | to | 500 | Top | 3,5 | 3,5 | 4,0 | 4,5 | ||||||
| The bottom | side | 2,5 | 3,0 | 3,5 | 3,5 | |||||||||
| SV. | 500 | TO | 800 | Top | 4,5 | 4,5 | 5,0 | 5,5 | 5,5 | |||||
| The bottom | side | 3,5 | 3.5 | 4,0 | 4,5 | 4,5 | ||||||||
| SV. | 800 | to | 1260 | Top | 5,0 | 5,0 | 6,0 | 6,5 | 7,0 | 7,0 | ||||
| The bottom | side | 3,5 | 4,0 | 4,5 | 4,5 | 5,0 | 5,0 | |||||||
| SV, | 1260 | to | 2000 | Top | 5,5 | 6,0 | 6,5 | 7,0 | 7,0 | 7,5 | 8,0 | |||
| The bottom | side | 4,0 | 4,5 | 4,5 | 5,0 | 5,0 | 5,5 | 6,0 | ||||||
| With | 2000 | to | 3150 | Top | 6,0 | 6,5 | 6,5 | 7,5 | 8,0 | 3,5 | 9,0 | 9,5 | ||
| The bottom | side | 4,0 | 4,5 | 4,5 | 5,0 | 5,5 | 6,0 | 6,5 | 6,5 | |||||
| SV. | 3150 | to | 5000 | Top | 6,0 | 5,5 | 7,0 | 7,5 | 8,0 | 9,0 | 9,5 | 10 | And | |
| The bottom | side | 4,5 | 5,0 | 5,0 | 5,5 | 6,0 | 3,5 | 7,0 | 7,5 | 8,5 | ||||
The machining allowances castings P class
Table b
mm
Nominal size
| The highest overall size of the part | The position of the surface when pouring | up to 50 | over 50 up to 120 | St 120 to 260 | St. 260 to 500 | over 500 to 800 | St. 800 to 1250 | 8g Y O U. |
St. 2000 to 3150 | S about and Have |
St. 5000 to 6300 |
| Up to 120 | Top | 3,5 | 4,0 | ||||||||
| The bottom side | 2,5 | 3,0 | |||||||||
| SV. 120 to 260 | Top | 4,0 | 4,5 | 5,0 | |||||||
| The bottom side | 3,0 | 3,5 | 4,0 | ||||||||
| SV. 260 to 500 | Top | 4,5 | 5,0 | 6,0 | 6,5 | ||||||
| The bottom side | 3,5 | 4,0 | 4,5 | 5,0 | |||||||
| SV. 500 to 800 | Top | 5,0 | 6,0 | 6,5 | 7,0 | 7,5 | |||||
| The bottom side | 4,0 | 4,5 | 4,5 | 5,0 | 5,5 |
GOST 1855−55 Page. 6
Extension table 6
mm
| The highest overall size of the part | The position of the surface when pouring 1 |
Nominal size | |||||||||
| I to 50 | over 50 up to 120 | 1 St 120 to 260 |
St. 260 to 500 | over 500 to 800 | St. 800 to 1250 | St. 1250 to 2000 | V. 2000 to 3150 | •*8 cog 5 § |
gg s§ I’m on about <</p> | ||
| SV. 800 to more than250 | Top | 6,0 | 7,0 | 7,0 | 7,5 | 8,0 | 8,5 | ||||
| The bottom side | 4,0 | 5,0 | 5,0 | 5,5 | 5,5 | 6,5 | |||||
| SV. 125;0 to 2000 | Top | 7,0 | 7,5 | 8,0 | 8,0 | 9,0 | 9,0 | 10 | |||
| Hem. side | 4,5 | 5,0 | 5,5 | 6,0 | 6,5 | 6,5 | 7,5 | ||||
| SV. 2000 to 3150 | Top | 7,0 | 7,5 | 8,0 | 8,5 | 9,0 | 10 | 11 | 12 | ||
| The bottom side | 5,0 | 5,0 | 5,5 | 6,0 | 5,5 | 7,0 | 8,5 | 9,0 | |||
| SV. 3150 up to 5000 | Top | 7,5 | 7,5 | 8,0 | 8,5 | 9,0 | 10 | 11 | 12 | 13 | |
| NID, side | 5 j5 | 5,5 | 6,0 | 6,0 | 6,5 | 7,0 | 8,0 | 9,0 | 10,0 | ||
| St., 5000 to 6300 | Top | 7.5 | 8,0 | 8,5 | 9,0 | 10 | 11 | 12 | 13 | 14 | 15 |
| The bottom side | 5 5 | 6,0 | 6,5 | 7,0 | 7,5 | 8,0 | 9,5 | 10 | 11 | 12 | |
The machining allowances castings 1I class
Table 7
mm
Nominal size
| The highest overall size of the part | The position of the surface when pouring | up to 120 | St. 120 to 260 |
o _ WITH £4, And <-> H |
over 500 j TO 800 |
St. 800 to 1250 | St. 1250 to 2000 | St. 2000 to 3150 |
cog m o about H |
St. 5000 to 6300 | § s Is About th On H | ||
| To | about 1^-- | Top | 4,5 | ||||||||||
| The bottom side | 3,5 | ||||||||||||
| SV. | 120 to | 260 | Top | 5 | 5,5 | ||||||||
| The bottom side | 4 | 4,5 | |||||||||||
| SV. | 260 to | 500 | Top | 6 | 7 | 7 | |||||||
| The bottom side | 4,5 | 5 | 6 | ||||||||||
| SV. | 500 to | 800 | Top | 7 | 7 | 8 | 9 | ||||||
| The bottom side | 5 | 5 | 6 | 7 | |||||||||
| SV. | 600 to | 1250 | Top | 7 | 8 | 8 | 9 | 10 | |||||
| The bottom side | 5,5 | 6 | 6 | 7 | 7,5 | ||||||||
| SV. | 1250 to | 2000 | Top | 8 | 8 | 9 | 9 | 10 | 12 | ||||
| The bottom side | 6 | 6 | t i |
7 | 8 | 9 | |||||||
| SV. | 2000 to | 3150 | Top | 9 | 9 | 10 | 10 | 11 | 12 | 14 | I | ||
| The bottom side | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 1 t |
|||||
Extension table 7
mm
| The highest overall size of the part | The position of the surface with. fill | Nominal size | |||||||||
up to 120 - |
St. 120 to 260 |
St. 260 to 500 | over 500 to 800 | St. 800 up to 1250 |
04 g W about about fcf |
V. 2000 to 3150 | St. 3150 to 5000 | 11 with about H |
St. 6300 to 10000 | ||
| SV. 3150 up to 5000 | Top | 9 | 10 | 10 | 11 | 112 | 14 | 16 | 16 | ||
| The bottom side | 7 | 8 | 8 | 9 | 9 | 11 | 12 | 13 | |||
| With. 5000 to 6300 | Top | 9 | 10 | And | 12 | 13 | 14 | 16 | 18 | 20 | |
| The bottom side | 7 | 8 | 9 | 9 | 10 | 11 | KZ | 15 | 17 | ||
| To V. 6300 to \ 0300 | Top | 9 | 10 | And | 12 | 14 | 16 | 18 | 20 | 22 | 24 |
| The bottom side | 7 | 8 | 9 | 10 | 11 | 13 | 15 | 17 | 19 | 21 | |
III. THE PERMISSIBLE DEVIATIONS BY MASS CASTING
9. Nominal mass of casting is of the IAOS parts installed with consideration of machining allowances and allowances related technotopia production, and indicated in the drawing of the casting or in the order.
10. Permissible upper deviation of the weight of castings set table. 8.
Table 8
| Nominal casting weight, kg | Accuracy class | ||
| I 1 | 1 p | 1 | |
| Tolerance in % | mass | ||
| To SO 1 | 5 | 7 | 3 |
| SV. 80 to | 4 | 6 | 7 |
| SV. 500 j | 3 | 5 | 6 |
Lower weight deviation limit negative deviations in size.
Editor 7. P. Shashina Tranches II the editor F. I. Reibstein Concealer E. V. Mitya
Delivered to the pub.
Of the order «badge of Honor» standards Publishing house, Moscow, D-557, Novopresnensky pereulok, 3. The Vilnius printing house of the Publishing house of standards, ul, Mindaugo. 12/14. Zach. 1010
