BECA 006 Piston
Description
The BECA 006 Piston profile is a machined guide ring with a 30° angle cut as standard made from filled PTFE or PE-UHMW, depending on the type of application. We can offer these rings with an "integrated" embossing (also called teardrop structures). The embossing is a set of lubricating pockets that enable an improvement in friction. Other types of cuts can be made.
Advantages
Substantial and improved lubrication conditions through the teardrop structures
Very good friction coefficient; no stick-slip effect
Good wear resistance; very long life
Increased absorption of foreign particles
Good vibration absorption
No water absorption for the PE-UHMW
Technical data
| Temperature | Filled PTFE: -60°C / +150°C (+200°C) |
|---|---|
| Speed | Filled PTFE: 15 m/s |
| Medias | Mineral hydraulic oils |
| Max. compression resistance | 30 to 35 N/mm² |
| Radial loads in dynamic applications | Filled PTFE: PE-UHMW: |
Applications
Agriculture
Food & Beverage
Shock absorbers
Maintenance
Dry applications
Injection presses
Pneumatics
Presses
Robotics
Standard cylinders
Materials
Bronze-filled PTFE
Carbon-filled PTFE
PE-UHMW
Dimensions
Installation dimensions
Installation dimensions
| ISO 10766 | Bore diameter | Groove diameter | Groove width | Seal thickness | Gap |
|---|---|---|---|---|---|
| ØD1 H9 | Ød1 h8 | L1 0/+0.20 | E | Z +/-0.50 | |
| * | 8.0 - 20.0 | D1 - 3.10 | 2.50 | 1.55 | 1.00 |
| * | 10.0 - 50.0 | D1 - 3.10 | 4.00 | 1.55 | 1.00 |
| * | 16.0 - 140.0 | D1 - 5.00 | 5.60 | 2.50 | 1.25 |
| * | 60.0 - 220.0 | D1 - 5.00 | 9.70 | 2.50 | 1.25 |
| * | 130.0 - 400.0 | D1 - 5.00 | 15.00 | 2.50 | 1.25 |
| * | 280.0 - 999.9 | D1 - 5.00 | 25.00 | 2.50 | 1.25 |
| * | 280.0 - 999.9 | D1 - 8.00 | 25.00 | 4.00 | 2.00 |
Other dimensions are possible, not taking ISO 10766 into consideration. Please contact our experts
Materials
| Type of material | Service temperature | Characteristics | Contact surface area |
|---|---|---|---|
| Filled PTFE | -60°C / +150°C (+200°C) | Very good friction coefficient Good wear resistance Good extrusion resistance Excellent chemical inertia |
Steel, chrome steel, Cast iron |
| PE-UHMW | -60°C/+80°C | Good wear resistance No water absorption Low friction coefficient, self-lubricating |
Steel, stainless steel, chrome steel, aluminium, bronze, Cast iron, treated surface |
Design guidelines
Guide sizing
The following formulas calculate the height "H" of the piston guide holder while taking account of the gap "Z" necessary at the ends of the ring after fitting. This gap "Z" offsets the thermal expansion under the effects of temperature, and prevents intermediate pressures and drag pressures in the system.
H = (F x f) / (ØD1 x Cr)
where:
H = Min. height of guide (mm)
F = Max. radial force (N)
f = Safety coefficient (we recommend 2)
ØD1 = Bore diameter (mm)
Cr = Permissible radial load in dynamic applications (N/mm²)
Types of cuts
Technical data
Extrusion gaps
| Bore diameter ØD1 |
Min. Radial extrusion gap F/2 min |
Max. Radial extrusion gap F/2 max |
|---|---|---|
| 8.0 - 20.0 | 0.20 | 0.30 |
| 21.0 - 100.0 | 0.25 | 0.40 |
| 101.0 - 250.0 | 0.30 | 0.60 |
| 251.0 - 500.0 | 0.40 | 0.80 |
| 501.0 - 1000.0 | 0.50 | 1.10 |
| > 1000.0 | 0.60 | 1.20 |
Surface roughness
| Roughness | Dynamic surface area | Static surface area | Groove flanks |
|---|---|---|---|
| Ra | 0.05 - 0.2 µm | ≤ 1.6 µm | ≤ 3.2 µm |
| Rz | 0.4 - 1.6 µm | ≤ 6.3 µm | ≤ 10.0 µm |
| Rmax | 0.63 - 2.5 µm | ≤ 10.0 µm | ≤ 16.0 µm |
Radius
| Bore diameter ØD1 |
Radius R1 |
|---|---|
| ≤ 250.0 | 0.20 |
| > 250.0 | 0.40 |
|
006.3253202
|
325,00 | 320,00 | 25,00 | 2,50 |
|
006.3303251
|
330,00 | 325,00 | 15,00 | 2,50 |
|
006.3303252
|
330,00 | 325,00 | 25,00 | 2,50 |
|
006.3353301
|
335,00 | 330,00 | 15,00 | 2,50 |
|
006.3353302
|
335,00 | 330,00 | 25,00 | 2,50 |
|
006.3403351
|
340,00 | 335,00 | 15,00 | 2,50 |
|
006.3403352
|
340,00 | 335,00 | 25,00 | 2,50 |
|
006.3453401
|
345,00 | 340,00 | 15,00 | 2,50 |
|
006.3453402
|
345,00 | 340,00 | 25,00 | 2,50 |
|
006.3503451
|
350,00 | 345,00 | 15,00 | 2,50 |
|
006.3503452
|
350,00 | 345,00 | 25,00 | 2,50 |
|
006.3603551
|
360,00 | 355,00 | 15,00 | 2,50 |
|
006.3603552
|
360,00 | 355,00 | 25,00 | 2,50 |
|
006.3703651
|
370,00 | 365,00 | 15,00 | 2,50 |
|
006.3703652
|
370,00 | 365,00 | 25,00 | 2,50 |
|
006.3803751
|
380,00 | 375,00 | 15,00 | 2,50 |
|
006.3803752
|
380,00 | 375,00 | 25,00 | 2,50 |
|
006.3903851
|
390,00 | 385,00 | 15,00 | 2,50 |
|
006.3903852
|
390,00 | 385,00 | 25,00 | 2,50 |
|
006.4003951
|
400,00 | 395,00 | 15,00 | 2,50 |
|
006.4003952
|
400,00 | 395,00 | 25,00 | 2,50 |
|
006.4504451
|
450,00 | 445,00 | 15,00 | 2,50 |
|
006.4504452
|
450,00 | 445,00 | 25,00 | 2,50 |
|
006.5004951
|
500,00 | 495,00 | 15,00 | 2,50 |
|
006.5004952
|
500,00 | 495,00 | 25,00 | 2,50 |
