PGR 130X124X30-PFGuide ring
Hydraulic guide rings are made of polymer materials and prevent metal-to-metal contact between moving parts in a working hydraulic cylinder. They accommodate radial loads, acting on the cylinder assembly, guiding the rod in the cylinder head and the piston in the cylinder bore. The special SKF hydraulic guide design provides a long service life and increases resistance to wear to cylinder surfaces.
Dimensions
| d |
124 mm
|
Inside diameter |
|---|---|---|
| D |
130 mm
|
Outside diameter |
| L |
30 mm
|
Groove width |
| t |
3 mm
|
Guide ring thickness |
| R |
max. 0.3 mm
|
Groove radius |
| r |
0.2 mm
|
Retainer radius |
| h |
≥ 1.5 mm
|
Retainer height |
| tol d |
-0.043 mm
|
Upper limit deviation |
|---|---|---|
|
-0.106 mm
|
Lower limit deviation | |
|
f8
|
Tolerance class for inside diameter | |
| tol D |
0.1 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation | |
|
H9
|
Tolerance class for outside diameter | |
|
Tolerance for D can require adjustment depending on piston seal and maximum e-gap.
|
||
| tol L |
0.2 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation | |
Material
| Material guide ring |
Phenolic fabric (PF)
|
| Ultimate compressive strength |
240 N/mm²
|
Operating conditions
| Speed |
max. 0.5 m/s
|
|
| Temperature |
max. 120 °C
|
|
| Maximum recommended bearing load pressure at 20 °C (70 °F) |
50 N/mm²
|
|
| Maximum recommended bearing load pressure at 80 °C (175 °F) |
30 N/mm²
|
|
|
Maximum values are for intermittent exposure and should not be applied simultaneously.
|
||
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