Double acting hydraulic cylind
發(fā)布時(shí)間：2009-09-20 來源：揚(yáng)子工具集團(tuán) 瀏覽次數(shù):64760Remarks l．Circularity here shall be expressed as the difference between the maxi-
mum diameter and the minimum diameter at an arbitrary section of a
tube，and the maximum value of circularity throughout the whole length of
the tube shall not exceed the value given in this Table．
2．Cylindricity here shall be expressed as the difference between the maxi—
mum diameter and the minimum diameter measured throughout the
whole length of the tube．
3．Bending of the tube shall be not more than l mm per l000 mlTl．
Table l3．Finished dimensiOIlS of rods
Unit：mm
|
Rod diameter
|
Tolerances on
finished dimension
|
Circularity and
cylindridty
|
|
lO l2 14 16 18
|
—0.016
—0．O43
|
0.027
|
|
20 22 25 28
|
——0.020
—0.053
|
0.033
|
|
32 36 40 45 50
|
—0.025
一O．064
|
0．o39
|
|
56 63 70 80
|
——0.030
—0.076
|
0.046
|
|
90 100 110 125
|
—0.036
一O．O90
|
0.054
|
|
140 160 180
|
—0．O43
—0.106
|
0.063
|
15
B 8354．1992
Remarks l．Circularity here shall be expressed as the difference between the maxi-
mum diameter and the minimum diameter at an arbitrary sectic fl of a rod，
and the maximum circularity throughout the whole length of the rod shall
not exceed the value given in this Table．
2．Cylindricity here shall be expressed as the difference between th≥maxi-
mum diameter and the minimum diameter measured throughou：the
whole length of the rod．
3．Bending of the rod shall be not more than 0．25 mm per l000 mm
7．2—Finish of sl—iding faces The finish of the tube inside face，sliding faces of
the rod and bush shall be expressed by the center line mean roughness，and shall
be approximately the roughness of Table l 4．
Table l4．Finish of sliding faces
|
Division according to sliding face
and applicable packing
|
Surface roughness
|
|
|
|
Rubber
|
0.4a(1.6S)
|
|
Sliding face of rod to
packing
|
Fabric reinforced
rubber
|
0.8 a(3.2S)
|
|
Others
|
0.8 a(3.2 S)
|
|
|
|
Rubber
|
0.4 a(1.6 S)(3)。0.8 a(3.2 S)
|
|
S1iding face of tube
|
Fabric reinforced
rubber
|
0.8 a(3.2S)
|
|
reside to paclcmg
|
Metal
|
0.4 a(1.6 S)
|
|
Others
|
0.8 a(3.2 S)
|
|
|
Sliding face of pison
|
0.8 a(3.2S)
|
|
|
Sliding face of bush
|
1.6 a(6.3 S)
|
|
Note(3) When 0-ring or X-ring is used．
Remarks l．Surface roughness shall be as defined in JIS B 0601．
2．Surface roughness given in parentheses should not be used as
far as possible．
7．3．Stroke length The stroke lengths shall be in accordance with Tat le l5，
and the tolerances thereof shall be in accordance with Table l6．
Even if Table l 5 is not applicable，it should preferably be in accord ance with
the provisions of JIS Z 8601．
Unit：mm
7．4
Table l6．Tolerances on stroke lengths
Unit：mm
|
|
Tolerances
|
|
|
Stroke length
|
Division
|
|
|
GradeA
|
GradeB
|
|
|
i00 and under
|
+0.8
O
|
+1.6
0
|
|
Over i00 up to and incl．250
|
+1．O
O
|
+2.5
O
|
|
Over 250 up to and incl．630
|
+1.25
0
|
+4．O
0
|
|
Over 630 up to and incl．i000
|
+1.4
O
|
+5.0
O
|
|
Over l000 up to and ind．1600
|
+1.6
0
|
+6.3
O
|
|
Over l600 up to and incl．2000
|
+1.8
O
|
+8.0
0
|
tube end face and fitting face of the cylinder cover
more than 0．04 mm．
The perpendicularity of the
to the shaft axis shall be not
7．5—Perpendicularity and—coaxiality of piston The perpendicularity of end face
of a piston body to its shaft axis shall be not more than 0．04 mm，and the
coaxiality of sliding face to the piston shaft axis shall be not more than 0．03 mm． 、．，，
7．6 Fits of piston and tube The fits of the sliding face of the piston and that
of the tube having been subjected to turning or honing should be of H 7／g 7 speci．
fled in JIS B 0401 for the piston using piston rin9，and be of H 9／f 8 for that
using packin9．For the tube having been subjected only to honin9，it is allowed to
use for the piston using packing SO long as it has the same clearance as the fit of
H 9／f 8 within the range of Table ll and Table l2．
7．7
and
Fits of bush and rod The fits of the bush(or a part corresponding to it)
the rod should conform to H 9／f 8 specified in JIS B 040 1．
7．8．1 Screw threads of rod end The screw
fine threads specified in JIS B 0207，and the
diameter shall conform to Table l7(A)．
threads of rod end shall be of metric
dimensions with respect to the rod
17
B 8354．1992
However，if Table l7(A)is not applicable，Table l7(B)should aW ly．
The permissible dimensional deviation and tolerance shall confoFIE t0 6 9
specified in JIS B 021 1．
When screw threads with pitches longer than those given in Table l7(A)
and Table l7(B)are used，it is recommended to select them among thos≥speci．
fied in Table l7(C)．
Table l7(A)Screw thread of rod end
|
Rod diameter
|
Nominal
designation 01"
screw thread
|
Length of
screw—thread
|
Rod diameter
|
Nominal
designation of
screw thread
|
I
8Cr
|
|
10(11.2)
|
M 8×1
|
12
|
50
|
M 45×1.5
|
|
|
12(12.5)
|
M 10 X 1.25
|
15
|
56
|
M 48 X 1.5
|
|
|
14
|
M 12 X 1.25
|
18
|
63
|
M 56×2
|
|
|
16
|
M 14 X 1.5
|
20
|
70(71)
|
M 64 X 2
|
|
|
18
|
M 16 X 1.5
|
25
|
80
|
M 72×2
|
|
|
20
|
M 18 X 1.5
|
27
|
90
|
M 80×2
|
|
|
22(22.4)
|
M 20 X 1.5
|
30
|
100
|
M 95 X 2
|
|
|
25
|
M 22×1.5
|
33
|
110(112)
|
M i00 X 2
|
|
|
28
|
M 24×1.5
|
35
|
125
|
M 120 X 2
|
|
|
32(31.5)
|
M 27×1.5
|
40
|
140
|
M 130 X 2
|
|
|
36(35.5)
|
M 30×1.5
|
45
|
160
|
M 150 X 2
|
|
|
40
|
M 33×1.5
|
50
|
180
|
M 170 X 2
|
|
|
45
|
M 39×1.5
|
60
|
|
||
Table l7(B)Screw thread of rod end
|
Rod diameter
|
Nominal
designation ot
screw thread
|
Length of
screw thread
|
Rod diameter
|
Nominal
designation of
screw thread
|
L
Scr
|
|
10(11.2)
|
M 8 X 1
|
12
|
50
|
M 39×1.5
|
|
|
12(12.5)
|
M 8 X 1
|
12
|
56
|
M 42 X 1.5
|
|
|
14
|
M 10 X 1.25
|
15
|
63
|
M 48 X 1.5
|
|
|
16
|
M 12 X 1.25
|
18
|
70(71)
|
M 56×2
|
|
|
18
|
M 14 X 1.5
|
20
|
80
|
M 60 X 2
|
|
|
20
|
M 16 X 1.5
|
25
|
90
|
M 68 X 2
|
|
|
22(22.4)
|
M 18 X 1.5
|
27
|
100
|
M 76 X 2
|
|
|
25
|
M 20 X 1.5
|
30
|
110(112)
|
M 85 X 2
|
|
|
28
|
M 22 X 1.5
|
33
|
125
|
M 90×2
|
|
|
32(31.5)
|
M 24 X 1.5
|
35
|
140
|
M 100 X 2
|
|
|
36(35.5)
|
M 27 X 1.5
|
40
|
160
|
M 120 X 2
|
|
|
40
|
M 30×1.6
|
45
|
180
|
M 130 X 2
|
|
|
45
|
M 33×1.5
|
50
|
|
||
18
B 8354．1992
Table l7(C)Screw thread of rod end
Unit：mm
|
Nominal desig-
natlon oi screw
thread
|
Nominal desig-
na鈕on oI screW
thread
|
|
M 3×0.35
M 4×0.5
M 5×0.5
M 6×0.75
M 8×1
M 10×1.25
M 12×1.25
M 14×1.5
M 16×1.5
M 18×．l．5
M 20×1.5
M 22×1.5
M 24×2
M 27×2
M 30×2
M 33×2
M 36×2
|
M 42×2
M 48×2
M 56×2
M 64×3
M 72×3
M 80×3
M 90×3
M i00×3
M 110×3
M 125×4
M 140×4
M 160×4
M 180×4
M 200×4
M 220×4
M 250×6
M 280 x 6
|
Informative reference：The nominal designations of screw threads conform
to those specified in IS0 4395：1978
7．8．．2—Pin holes a—t rod ends The dimensions of the pin holes at rod ends shall
conform to Table l8．
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