BECA 005 Piston
Description
The BECA 005 Piston profile is a machined guide ring or wear ring with a 30° angle cut as standard in a tubular material composed of a cotton weave with a superfine mesh, imbibed with phenolic resin with added lubricant. Other types of cuts can be made.
Advantages
Good dimensional stability
Good vibration absorption
Good friction characteristics
Good dry operation
Increased life span
Technical data
| Temperature | -40°C/+130°C |
|---|---|
| Speed | 1 m/s |
| Max. compression resistance | 270 to 340 N/mm² |
| Radial loads in dynamic applications | max. 100 N/mm² at 25°C |
Applications
Hydraulic cylinders
Hydraulic excavators
Mobile machinery
Construction equipment
Presses
Materials
Phenolic resin PF
Dimensions
Installation dimensions
Installation dimensions
| ISO 10766 | Bore diameter | Groove diameter | Groove width | Thickness of the seal |
Gap |
|---|---|---|---|---|---|
| ØD1 H9 | Ød1 h8 | L1 0/+0.20 | E | Z +/-0.50 | |
| * | 16.0 - 50.0 | D1 - 3.10 | 4.00 | 1.55 | 1.00 |
| * | 16.0 - 125.0 | D1 - 5.00 | 5.60 | 2.50 | 1.25 |
| * | 25.0 - 250.0 | D1 - 5.00 | 9.70 | 2.50 | 1.25 |
| * | 80.0 - 500.0 | D1 - 5.00 | 15.00 | 2.50 | 1.25 |
| * | 125.0 - 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
Phenolic resin
The BECA 005 rod and piston wear rings are made from round phenolic resin tubes. This is a laminate composed of layers of very resistant cotton fabric, which has been soaked in a phenol resin and then compressed at a high temperature. While fitting under high pressure and high temperature environments, the phenolic resin bonds the coiled layers, which become inseparable after hardening.
The phenolic resin offers increased mechanical resistance (hard and rigid) with good resistance on impact, and good resistance on bending, stripping and compression. It has good dimensional stability with a very low moisture pickup.
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
The wear rings are made with a 30° angle cut as standard. Other types of cuts can be made on request, as shown in the diagram below.
Technical data
Extrusion gaps
| Seal thickness E |
Radial extrusion gap F/2 |
|---|---|
| 1.55 | 0.50 |
| 2.50 | 0.90 |
| 4.00 | 1.50 |
Surface roughness
| Roughness | Dynamic surface area | Static surface area | Groove flanks |
|---|---|---|---|
| Ra | 0.1 - 0.4 µm | ≤ 1.6 µm | ≤ 3.2 µm |
| Rz | 0.63 - 2.5 µm | ≤ 6.3 µm | ≤ 10.0 µm |
| Rmax | 1.0 - 4.0 µm | ≤ 10.0 µm | ≤ 16.0 µm |
Radius
| Bore diameter ØD1 |
Radius R1 |
|---|---|
| ≤ 250.0 | 0.20 |
| > 250.0 | 0.40 |
|
005.0080494
|
8,00 | 4,90 | 4,00 | 1,55 |
|
005.0100694
|
10,00 | 6,90 | 4,00 | 1,55 |
|
005.0120894
|
12,00 | 8,90 | 4,00 | 1,55 |
|
005.0141094
|
14,00 | 10,90 | 4,00 | 1,55 |
|
005.0151194
|
15,00 | 11,90 | 4,00 | 1,55 |
|
005.0160115
|
16,00 | 11,00 | 5,60 | 2,50 |
|
005.0161294
|
16,00 | 12,90 | 4,00 | 1,55 |
|
005.0180135
|
18,00 | 13,00 | 5,60 | 2,50 |
|
005.0181494
|
18,00 | 14,90 | 4,00 | 1,55 |
|
005.0200155
|
20,00 | 15,00 | 5,60 | 2,50 |
|
005.0201694
|
20,00 | 16,90 | 4,00 | 1,55 |
|
005.0220175
|
22,00 | 17,00 | 5,60 | 2,50 |
|
005.0221894
|
22,00 | 18,90 | 4,00 | 1,55 |
|
005.0250205
|
25,00 | 20,00 | 5,60 | 2,50 |
|
005.0250209
|
25,00 | 20,00 | 9,70 | 2,50 |
|
005.0252194
|
25,00 | 21,90 | 4,00 | 1,55 |
|
005.0270225
|
27,00 | 22,00 | 5,60 | 2,50 |
|
005.0270229
|
27,00 | 22,00 | 9,70 | 2,50 |
|
005.0272394
|
27,00 | 23,90 | 4,00 | 1,55 |
|
005.0280235
|
28,00 | 23,00 | 5,60 | 2,50 |
|
005.0280239
|
28,00 | 23,00 | 9,70 | 2,50 |
|
005.0282494
|
28,00 | 24,90 | 4,00 | 1,55 |
|
005.0300255
|
30,00 | 25,00 | 5,60 | 2,50 |
|
005.0300259
|
30,00 | 25,00 | 9,70 | 2,50 |
|
005.0302694
|
30,00 | 26,90 | 4,00 | 1,55 |
|
005.0320275
|
32,00 | 27,00 | 5,60 | 2,50 |
|
005.0320279
|
32,00 | 27,00 | 9,70 | 2,50 |
|
005.0322894
|
32,00 | 28,90 | 4,00 | 1,55 |
|
005.0330285
|
33,00 | 28,00 | 5,60 | 2,50 |
|
005.0330289
|
33,00 | 28,00 | 9,70 | 2,50 |
|
005.0332994
|
33,00 | 29,90 | 4,00 | 1,55 |
|
005.0350305
|
35,00 | 30,00 | 5,60 | 2,50 |
|
005.0350309
|
35,00 | 30,00 | 9,70 | 2,50 |
|
005.0353194
|
35,00 | 31,90 | 4,00 | 1,55 |
|
005.0360315
|
36,00 | 31,00 | 5,60 | 2,50 |
|
005.0360319
|
36,00 | 31,00 | 9,70 | 2,50 |
|
005.0363294
|
36,00 | 32,90 | 4,00 | 1,55 |
|
005.0370325
|
37,00 | 32,00 | 5,60 | 2,50 |
|
005.0370329
|
37,00 | 32,00 | 9,70 | 2,50 |
|
005.0373394
|
37,00 | 33,90 | 4,00 | 1,55 |
|
005.0380335
|
38,00 | 33,00 | 5,60 | 2,50 |
|
005.0380339
|
38,00 | 33,00 | 9,70 | 2,50 |
|
005.0383494
|
38,00 | 34,90 | 4,00 | 1,55 |
|
005.0400355
|
40,00 | 35,00 | 5,60 | 2,50 |
|
005.0400359
|
40,00 | 35,00 | 9,70 | 2,50 |
|
005.0403694
|
40,00 | 36,90 | 4,00 | 1,55 |
|
005.0410365
|
41,00 | 36,00 | 5,60 | 2,50 |
|
005.0410369
|
41,00 | 36,00 | 9,70 | 2,50 |
|
005.0413794
|
41,00 | 37,90 | 4,00 | 1,55 |
|
005.0420375
|
42,00 | 37,00 | 5,60 | 2,50 |
|
005.0420379
|
42,00 | 37,00 | 9,70 | 2,50 |
|
005.0423894
|
42,00 | 38,90 | 4,00 | 1,55 |
|
005.0450405
|
45,00 | 40,00 | 5,60 | 2,50 |
|
005.0450409
|
45,00 | 40,00 | 9,70 | 2,50 |
|
005.0454194
|
45,00 | 41,90 | 4,00 | 1,55 |
|
005.0480435
|
48,00 | 43,00 | 5,60 | 2,50 |
|
005.0480439
|
48,00 | 43,00 | 9,70 | 2,50 |
|
005.0484494
|
48,00 | 44,90 | 4,00 | 1,55 |
|
005.0500455
|
50,00 | 45,00 | 5,60 | 2,50 |
|
005.0500459
|
50,00 | 45,00 | 9,70 | 2,50 |
|
005.0504694
|
50,00 | 46,90 | 4,00 | 1,55 |
|
005.0520475
|
52,00 | 47,00 | 5,60 | 2,50 |
|
005.0520479
|
52,00 | 47,00 | 9,70 | 2,50 |
|
005.0550505
|
55,00 | 50,00 | 5,60 | 2,50 |
|
005.0550509
|
55,00 | 50,00 | 9,70 | 2,50 |
|
005.0580535
|
58,00 | 53,00 | 5,60 | 2,50 |
|
005.0580539
|
58,00 | 53,00 | 9,70 | 2,50 |
|
005.0600555
|
60,00 | 55,00 | 5,60 | 2,50 |
|
005.0600559
|
60,00 | 55,00 | 9,70 | 2,50 |
|
005.0610565
|
61,00 | 56,00 | 5,60 | 2,50 |
|
005.0610569
|
61,00 | 56,00 | 9,70 | 2,50 |
|
005.0630585
|
63,00 | 58,00 | 5,60 | 2,50 |
|
005.0630589
|
63,00 | 58,00 | 9,70 | 2,50 |
|
005.0650605
|
65,00 | 60,00 | 5,60 | 2,50 |
|
005.0650609
|
65,00 | 60,00 | 9,70 | 2,50 |
|
005.0680635
|
68,00 | 63,00 | 5,60 | 2,50 |
|
005.0680639
|
68,00 | 63,00 | 9,70 | 2,50 |
|
005.0700655
|
70,00 | 65,00 | 5,60 | 2,50 |
|
005.0700659
|
70,00 | 65,00 | 9,70 | 2,50 |
|
005.0720675
|
72,00 | 67,00 | 5,60 | 2,50 |
|
005.0720679
|
72,00 | 67,00 | 9,70 | 2,50 |
|
005.0750705
|
75,00 | 70,00 | 5,60 | 2,50 |
|
005.0750709
|
75,00 | 70,00 | 9,70 | 2,50 |
|
005.0780735
|
78,00 | 73,00 | 5,60 | 2,50 |
|
005.0780739
|
78,00 | 73,00 | 9,70 | 2,50 |
|
005.0800755
|
80,00 | 75,00 | 5,60 | 2,50 |
|
005.0800759
|
80,00 | 75,00 | 9,70 | 2,50 |
|
005.0850805
|
85,00 | 80,00 | 5,60 | 2,50 |
|
005.0850809
|
85,00 | 80,00 | 9,70 | 2,50 |
|
005.0900855
|
90,00 | 85,00 | 5,60 | 2,50 |
|
005.0900859
|
90,00 | 85,00 | 9,70 | 2,50 |
|
005.0950905
|
95,00 | 90,00 | 5,60 | 2,50 |
|
005.0950909
|
95,00 | 90,00 | 9,70 | 2,50 |
|
005.1000955
|
100,00 | 95,00 | 5,60 | 2,50 |
|
005.1000959
|
100,00 | 95,00 | 9,70 | 2,50 |
|
005.1051005
|
105,00 | 100,00 | 5,60 | 2,50 |
|
005.1051009
|
105,00 | 100,00 | 9,70 | 2,50 |
|
005.1101055
|
110,00 | 105,00 | 5,60 | 2,50 |
|
005.1101059
|
110,00 | 105,00 | 9,70 | 2,50 |
|
005.1151105
|
115,00 | 110,00 | 5,60 | 2,50 |
