WGT187-8500-1500-E8DGuide 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 |
206.38 mm
|
Inside diameter |
|---|---|---|
| D |
215.9 mm
|
Outside diameter |
| L |
38.35 mm
|
Groove width |
| t |
4.75 mm
|
Guide ring thickness |
| R |
max. 0.6 mm
|
Groove radius |
| r |
0.2 mm
|
Retainer radius |
| h |
≥ 2.37 mm
|
Retainer height |
| tol d |
0 mm
|
Upper limit deviation |
|---|---|---|
|
-0.102 mm
|
Lower limit deviation | |
| tol D |
0.152 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation | |
|
Tolerance for D can require adjustment depending on piston seal and maximum e-gap.
|
||
| tol L |
0.254 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation | |
| tol d |
0 mm
|
Upper limit deviation |
|---|---|---|
|
-0.1 mm
|
Lower limit deviation | |
|
Tolerance for d can require adjustment depending on rod seal and maximum e-gap.
|
||
| tol D |
0.1 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation | |
| tol L |
0.254 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation | |
Material
| Material guide ring |
Polyamide (PA P-2551)
|
| Ultimate compressive strength |
158 N/mm²
|
Operating conditions
| Speed |
max. 1 m/s
|
|
| Temperature |
max. 120 °C
|
|
| Maximum recommended bearing load pressure at 20 °C (70 °F) |
40 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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