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BECA 005 Piston

BECA 005 Piston
BECA 005
beca_005_3d_v1
beca_005_3d_v2

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
max. 50 N/mm² > at 60°C

Applications

Hydraulic cylinders
Hydraulic excavators
Mobile machinery
Construction equipment
Presses

Materials

Phenolic resin PF

Dimensions
Installation dimensions
Materials
Design guidelines
Technical data

Dimensions

Installation drawingLogement Gorge Bague de guidage Porteur Segment - Housing Groove Wear ring - BECA 005 Piston

Installation dimensions

Housing Groove Wear ring Guide ring Guide seal - BECA 005 Piston

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.

Types of cuts for wear rings and guide strips

Technical data

Housing Groove Wear ring Guide ring Guide seal - BECA 005 Piston

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
225 dimensions found
005.0080494
Standard request
8,00 4,90 4,00 1,55
005.0100694
Standard request
10,00 6,90 4,00 1,55
005.0120894
Standard request
12,00 8,90 4,00 1,55
005.0141094
Standard request
14,00 10,90 4,00 1,55
005.0151194
Standard request
15,00 11,90 4,00 1,55
005.0160115
Standard request
16,00 11,00 5,60 2,50
005.0161294
Standard request
16,00 12,90 4,00 1,55
005.0180135
Standard request
18,00 13,00 5,60 2,50
005.0181494
Standard request
18,00 14,90 4,00 1,55
005.0200155
Standard request
20,00 15,00 5,60 2,50
005.0201694
Standard request
20,00 16,90 4,00 1,55
005.0220175
Standard request
22,00 17,00 5,60 2,50
005.0221894
Standard request
22,00 18,90 4,00 1,55
005.0250205
Standard request
25,00 20,00 5,60 2,50
005.0250209
Standard request
25,00 20,00 9,70 2,50
005.0252194
Standard request
25,00 21,90 4,00 1,55
005.0270225
Standard request
27,00 22,00 5,60 2,50
005.0270229
Standard request
27,00 22,00 9,70 2,50
005.0272394
Standard request
27,00 23,90 4,00 1,55
005.0280235
Standard request
28,00 23,00 5,60 2,50
005.0280239
Standard request
28,00 23,00 9,70 2,50
005.0282494
Standard request
28,00 24,90 4,00 1,55
005.0300255
Standard request
30,00 25,00 5,60 2,50
005.0300259
Standard request
30,00 25,00 9,70 2,50
005.0302694
Standard request
30,00 26,90 4,00 1,55
005.0320275
Standard request
32,00 27,00 5,60 2,50
005.0320279
Standard request
32,00 27,00 9,70 2,50
005.0322894
Standard request
32,00 28,90 4,00 1,55
005.0330285
Standard request
33,00 28,00 5,60 2,50
005.0330289
Standard request
33,00 28,00 9,70 2,50
005.0332994
Standard request
33,00 29,90 4,00 1,55
005.0350305
Standard request
35,00 30,00 5,60 2,50
005.0350309
Standard request
35,00 30,00 9,70 2,50
005.0353194
Standard request
35,00 31,90 4,00 1,55
005.0360315
Standard request
36,00 31,00 5,60 2,50
005.0360319
Standard request
36,00 31,00 9,70 2,50
005.0363294
Standard request
36,00 32,90 4,00 1,55
005.0370325
Standard request
37,00 32,00 5,60 2,50
005.0370329
Standard request
37,00 32,00 9,70 2,50
005.0373394
Standard request
37,00 33,90 4,00 1,55
005.0380335
Standard request
38,00 33,00 5,60 2,50
005.0380339
Standard request
38,00 33,00 9,70 2,50
005.0383494
Standard request
38,00 34,90 4,00 1,55
005.0400355
Standard request
40,00 35,00 5,60 2,50
005.0400359
Standard request
40,00 35,00 9,70 2,50
005.0403694
Standard request
40,00 36,90 4,00 1,55
005.0410365
Standard request
41,00 36,00 5,60 2,50
005.0410369
Standard request
41,00 36,00 9,70 2,50
005.0413794
Standard request
41,00 37,90 4,00 1,55
005.0420375
Standard request
42,00 37,00 5,60 2,50
005.0420379
Standard request
42,00 37,00 9,70 2,50
005.0423894
Standard request
42,00 38,90 4,00 1,55
005.0450405
Standard request
45,00 40,00 5,60 2,50
005.0450409
Standard request
45,00 40,00 9,70 2,50
005.0454194
Standard request
45,00 41,90 4,00 1,55
005.0480435
Standard request
48,00 43,00 5,60 2,50
005.0480439
Standard request
48,00 43,00 9,70 2,50
005.0484494
Standard request
48,00 44,90 4,00 1,55
005.0500455
Standard request
50,00 45,00 5,60 2,50
005.0500459
Standard request
50,00 45,00 9,70 2,50
005.0504694
Standard request
50,00 46,90 4,00 1,55
005.0520475
Standard request
52,00 47,00 5,60 2,50
005.0520479
Standard request
52,00 47,00 9,70 2,50
005.0550505
Standard request
55,00 50,00 5,60 2,50
005.0550509
Standard request
55,00 50,00 9,70 2,50
005.0580535
Standard request
58,00 53,00 5,60 2,50
005.0580539
Standard request
58,00 53,00 9,70 2,50
005.0600555
Standard request
60,00 55,00 5,60 2,50
005.0600559
Standard request
60,00 55,00 9,70 2,50
005.0610565
Standard request
61,00 56,00 5,60 2,50
005.0610569
Standard request
61,00 56,00 9,70 2,50
005.0630585
Standard request
63,00 58,00 5,60 2,50
005.0630589
Standard request
63,00 58,00 9,70 2,50
005.0650605
Standard request
65,00 60,00 5,60 2,50
005.0650609
Standard request
65,00 60,00 9,70 2,50
005.0680635
Standard request
68,00 63,00 5,60 2,50
005.0680639
Standard request
68,00 63,00 9,70 2,50
005.0700655
Standard request
70,00 65,00 5,60 2,50
005.0700659
Standard request
70,00 65,00 9,70 2,50
005.0720675
Standard request
72,00 67,00 5,60 2,50
005.0720679
Standard request
72,00 67,00 9,70 2,50
005.0750705
Standard request
75,00 70,00 5,60 2,50
005.0750709
Standard request
75,00 70,00 9,70 2,50
005.0780735
Standard request
78,00 73,00 5,60 2,50
005.0780739
Standard request
78,00 73,00 9,70 2,50
005.0800755
Standard request
80,00 75,00 5,60 2,50
005.0800759
Standard request
80,00 75,00 9,70 2,50
005.0850805
Standard request
85,00 80,00 5,60 2,50
005.0850809
Standard request
85,00 80,00 9,70 2,50
005.0900855
Standard request
90,00 85,00 5,60 2,50
005.0900859
Standard request
90,00 85,00 9,70 2,50
005.0950905
Standard request
95,00 90,00 5,60 2,50
005.0950909
Standard request
95,00 90,00 9,70 2,50
005.1000955
Standard request
100,00 95,00 5,60 2,50
005.1000959
Standard request
100,00 95,00 9,70 2,50
005.1051005
Standard request
105,00 100,00 5,60 2,50
005.1051009
Standard request
105,00 100,00 9,70 2,50
005.1101055
Standard request
110,00 105,00 5,60 2,50
005.1101059
Standard request
110,00 105,00 9,70 2,50
005.1151105
Standard request
115,00 110,00 5,60 2,50
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