HD Skates

 NOMOGRAPH for SKATE TAPE WIDTH

Dry NEUFLON-031 compound   Ra=0.2  HRc 38-40 steel   Temp. max.50°C
Example: 
  • Hydraulic cylinder F125 Hardness 160 HRb  
  • Average load on skate 120 dN  
  • Max. load 1200 dN  
  • Required life 5000 hrs  
  • Average run 1250 mm  
  • Medium number of strokes: 400/h  
  • Max. seal wear allowed 0.2 mm  
  • Environment: Hydraulic oil 5°E at 20°C  
Skate tape width:

Procedure

  • The diameter-load conjunctive 1  is traced  
  • The point 1y-wear conjunctive 2  is traced  
  • The total path is determned: 400 runs/h x 1.25m/stroke x 5000 h= 2500Km  
  • From point 2500 Kms the conjunctive 3  is traced with point 3z until it finds Skate tape width = 14.8  
Max. load check (usually with the rod "fully out")

Procedure

  • The max load-diameter conjunctive 4  is subtended  
  • The feedthrough width of Skate point 4y is traced which will indicate a specific pressure of about 65 dN/cm2 which is allowed up to 80°C
The Wear could be double if  NEUFLON-032  is used. 
Corrective temperature factors: At 60°C the wear could be 25% higher than that indicated. 
A 90°C, 70% and at 120°C, 150% higher.
 
HOW TO ORDER

SUPPLIED IN COILS:

HD Skate Initials(width only) Thickness Material
Example: Groove width 30   thickness 2.5   material NEUFLON-031                                                    HDS 30/2.5  NEUFLON-031
 

MADE TO MEASURE SUPPLY

HD Skate Initials(P or C 
and width)-		 Thickness Cylinder bore 
or rod		 Material
Esempio: Housing on piston F 120  Groove width 9.7   thickness 2.5 material NEUFLON-031        HDSP 9/2.5 - 120  NEUFLON-031

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