Kastas Sealing Technologies
Sign in
   
Language Selection
Technical Information
Hydraulic Sealing Elements
Working Principle Of Sealing Elements
Surface Roughness
System Tolerances And Designs
General Installation Information
Choosing Sealing Elements
Permissible Sealing Gap
Pneumatic Sealing Elements
Guide Elements
O’rings
General Installation Information
Storage Conditions
  
/ Technical Information / Hydraulic Sealing Elements / System Tolerances And Designs
System Tolerances And Designs

SYSTEM TOLERANCES AND DESIGNS

 System tolerances are the important  factors on the life span of the sealing elements. Inappropriate dimensions, tolerances and not centered hydraulic cylinders make the sealing elements wear out in short period of time and the system do not give the required performance.

All the dimensions and tolerances are indicated on the product pages of our catologue. Table 2 shows the general tolerances used in the hydraulic systems. The cylinder bore in hydraulic system is produced from ST 52 or better quality.

 Sliding surfaces should have the mentioned operations (honed, grinded, etc) in order to obtain the required surface roughness values. Rods should be produced from steel (chrome plated, grinded and polished). Other cylinder parts should be from steel, steel casting, cast iron or special engineering plastics.

Below are some gland cap and piston designs in hydraulic cylinders depending on the sealing elements and applications;

  

NOMINAL DIMENSION
(mm)
HOLE  TOLERANCES
(µm)
OD  TOLERANCES
(µm)
> <= H8 H9  H10  H11  H12  e9  f7  f8 f9 h8  h9 h10   h11
  3 +14  +25 +40  +60 +100  -14  -6  -6  -6  0  0  0  0
-0  -0 -0 -0 -0  -39  -16  -20  -31  -14  -25  -40  -60
3 6 +18  +30 +48 +75 +120  -20  -10  -10  -10  0  0  0  0
-0  -0 -0 -0 -0   -50  -2  -28  -40  -18  -30  -48  -75
6 10 +22 +36 +58  +90 +150  -25  -13  -13  -13  0  0  0  0
-0 -0 -0 -0 -0   -61  -28  -35  -49  -22  -36  -58  -90
10 18 +27  +43 + 70 +110 +180  -32  -16  -16  -16  0  0  0  0
-0 -0 -0 -0 -0   -75  -34  -43  -59  -27  -43  -70  -110
18 30 +33 +52 + 84  +130 +210  -40  -20  -20  -20  0  0  0  0
-0  -0 -0  -0 -0   -92  -41  -53  -72  -33  -52  -84  -130
30 50 +39  +62 +100 +160 +250  -50  -25  -25  -25  0  0  0  0
-0  -0 -0 -0 -0  -112  -50  -64  -87  -39  -62  -100  -160
50 80 +46  +74 +120  +190 +300  -60  -30  -30  -30  0  0  0  0
-0  -0 -0 -0 -0   -134  -60  -76  -104  -46  -74  -120  -190
80 120 +54  +87 +140 +220 +350  -72  -36  -36  -36  0  0  0  0
-0  -0 -0 -0 -0  -159  -71  -90  -123  -54  -87  -140  -220
120 180 +63  +100 +160  +250  +400  -85  -43  -43  -43  0  0  0  0
-0  -0 -0 -0 -0  -185  -83  -106  -143  -63  -100  -160  -250
180 250 +72  +115 +185  +290 +460  -100  -50  -50  -50  0  0  0  0
-0  -0 -0 -0 -0  -215  -96  -122  -165  -72  -115  -185  -290
250 315 +81  +130 +210  +320 +520  -110  -56  -56  -56  0  0  0  0
-0  -0 -0 -0 -0  -240  -108  -137  -185  -81  -130  -210  -320
315 400 +89  +140  +230 +360 +570  -125  -62  -62  -62  0  0  0  0
-0  -0 -0 -0 -0  -265  -119  -151  -202  -89  -140  -230  -360
400 500 +97  +155 +250   +400 +630  -135  -68  -68  -68  0  0  0  0
-0  -0 -0 -0 -0  -290  -131  -165  -223  -97  -155  -250  -400




 


Kastas Sealing Technologies Europe GmbH


Imprint
Privacy Policy
Company  
Company Profile
R&D
Manufacturing
Quality Management
Sales and Logistics
Corporate Responsibility
Careers
Products  
Hydraulic Sealing Elements
Pneumatic Sealing Elements
Guiding Elements
Static Sealing Elements
Special Sealing Elements
SmartSeal Custom-Made Machined Seals
Industries
Agricultural Machinery
Construction Machinery
Hydraulic Press Construction
Material Handling
Mining Industry
Metal Processing
Plastic Injection Moulding Machines
Technical Information
Hydraulic Sealing Elements
Pneumatic Sealing Elements
Guide Elements
O’rings
General Installation Information
Storage Conditions
News & Media
News
Events & Exhibitions
Download Center
Videos
Kastas Zoom
Newsletter
Contact
Headquarters
Kastas Europe GmbH
Branches
Distributors
Contact Form
© All rights reserved 2020
Asersoft