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BECA 007 Piston

BECA 007 Piston
BECA 007
beca_007_3d_v1
beca_007_3d_v2

Description

The BECA 007 Piston profile is a machined guide ring or wear ring with a 30° angle cut as standard, made from glass-filled POM. Other types of cuts can be made.

Advantages

Great compression resistance
Great wear resistance
Water absorption limited to 0.2%
Good stiffness

Technical data

Temperature

-50°C / +115°C (+140°C peak)

Speed

1 m/s

Max. compression resistance

170 N/mm²
Radial loads in dynamic applications

40 N/mm² at 25°C
25 N/mm² > 60°C

Applications

Lifting trucks
Construction equipment
Agricultural machinery
Standard cylinders

Materials

Polyoxymethylene - POM

Dimensions
Installation dimensions
Materials
Design guidelines
Technical data

Dimensions

007.0080494, 007.0100694, 007.0120894, 007.0141094, 007.0151194, 007.0160115, 007.0161294, 007.0180135, 007.0181494, 007.0200155, 007.0201694, 007.0220175, 007.0221894, 007.0250205, 007.0250209, 007.0252194, 007.0270225, 007.0270229, 007.0272394, 007.0280235, 007.0280239, 007.0282494, 007.0300255, 007.0300259, 007.0302694, 007.0320275, 007.0320279, 007.0322894, 007.0330285, 007.0330289, 007.0332994, 007.0350305, 007.0350309, 007.0353194, 007.0360315, 007.0360319, 007.0363294, 007.0370325, 007.0370329, 007.0373394, 007.0380335, 007.0380339, 007.0383494, 007.0400355, 007.0400359, 007.0403694, 007.0410365, 007.0410369, 007.0413794, 007.0420375, 007.0420379, 007.0423894, 007.0450405, 007.0450409, 007.0454194, 007.0480435, 007.0480439, 007.0484494, 007.0500455, 007.0500459, 007.0504694, 007.0520475, 007.0520479, 007.0550505, 007.0550509, 007.0580535, 007.0580539, 007.0600555, 007.0600559, 007.0610565, 007.0610569, 007.0630585, 007.0630589, 007.0650605, 007.0650609, 007.0680635, 007.0680639, 007.0700655, 007.0700659, 007.0720675, 007.0720679, 007.0750705, 007.0750709, 007.0780735, 007.0780739, 007.0800755, 007.0800759, 007.0850805, 007.0850809, 007.0900855, 007.0900859, 007.0950905, 007.0950909, 007.1000955, 007.1000959, 007.1051005, 007.1051009, 007.1101055, 007.1101059, 007.1151105, 007.1151109, 007.1201155, 007.1201159, 007.1251205, 007.1251209, 007.1251202, 007.1301259, 007.1301252, 007.1351309, 007.1351302, 007.1401359, 007.1401352, 007.1451409, 007.1451402, 007.1501459, 007.1501452, 007.1551509, 007.1551502, 007.1601559, 007.1601552, 007.1651609, 007.1651602, 007.1701659, 007.1701652, 007.1751709, 007.1751702, 007.1801759, 007.1801751, 007.1801752, 007.1851809, 007.1851801, 007.1851802, 007.1901859, 007.1901851, 007.1901852, 007.1951909, 007.1951901, 007.1951902, 007.2001959, 007.2001951, 007.2001952, 007.2052009, 007.2052001, 007.2052002, 007.2102059, 007.2102051, 007.2102052, 007.2152109, 007.2152101, 007.2152102, 007.2202159, 007.2202151, 007.2202152, 007.2252209, 007.2252201, 007.2252202, 007.2302259, 007.2302251, 007.2302252, 007.2352309, 007.2352301, 007.2352302, 007.2402359, 007.2402351, 007.2402352, 007.2452409, 007.2452401, 007.2452402, 007.2502459, 007.2502451, 007.2502452, 007.2552501, 007.2552502, 007.2602551, 007.2602552, 007.2652601, 007.2652602, 007.2702651, 007.2702652, 007.2752701, 007.2752702, 007.2802751, 007.2802752, 007.2852801, 007.2852802, 007.2902851, 007.2902852, 007.2952901, 007.2952902, 007.3002951, 007.3002952, 007.3053001, 007.3053002, 007.3103051, 007.3103052, 007.3153101, 007.3153102, 007.3203151, 007.3203152, 007.3253201, 007.3253202, 007.3303251, 007.3303252, 007.3353301, 007.3353302, 007.3403351, 007.3403352, 007.3453401, 007.3453402, 007.3503451, 007.3503452, 007.3603551, 007.3603552, 007.3703651, 007.3703652, 007.3803751, 007.3803752, 007.3903851, 007.3903852, 007.4003951, 007.4003952, 007.4504451, 007.4504452, 007.5004951, 007.5004952
Installation drawingLogement Gorge Bague de guidage Porteur Segment - Housing Groove Wear ring - BECA 007 Piston

Installation dimensions

Housing Groove Wear ring Guide ring Guide seal - BECA 007 Piston

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
* 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 - 500.0 D1 - 5.00 15.00 2.50 1.25
* 280.0 - 500.0 D1 - 5.00 25.00 2.50 1.25
* 280.0 - 500.0 D1 - 8.00 25.00 4.00 2.00

Other dimensions are possible, not taking ISO 10766 into consideration. Please contact our experts.

Materials

Polyoxymethylene - POM

Polyoxymethylene (POM or polyacetal) belongs to the thermoplastics, which have a number of advantages - strong mechanical resistance, good creep strength, high resistance to shocks, particularly at low temperatures, good wear resistance, good sliding coefficient, excellent machinability and good dielectric properties. The low water absorption coefficient, unlike polyamide (PA), also gives this material an excellent dimensional stability.

Chemical resistance

Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel)
Mineral oils and greases
Fire-resistant fluids (HFA, HFB and HFC)
Water
Compatibility issue Acids
Temperature range -50°C/+115°C

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 007 Piston

Extrusion gaps

Bore diameter
ØD1		 Radial extrusion gap
F/2
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 - 300.0 0.40 0.80
301.0 - 500.0 0.40 0.80

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
007.3253202
Standard request
 325,00 320,00 25,00 2,50
007.3303251
Standard request
 330,00 325,00 15,00 2,50
007.3303252
Standard request
 330,00 325,00 25,00 2,50
007.3353301
Standard request
 335,00 330,00 15,00 2,50
007.3353302
Standard request
 335,00 330,00 25,00 2,50
007.3403351
Standard request
 340,00 335,00 15,00 2,50
007.3403352
Standard request
 340,00 335,00 25,00 2,50
007.3453401
Standard request
 345,00 340,00 15,00 2,50
007.3453402
Standard request
 345,00 340,00 25,00 2,50
007.3503451
Standard request
 350,00 345,00 15,00 2,50
007.3503452
Standard request
 350,00 345,00 25,00 2,50
007.3603551
Standard request
 360,00 355,00 15,00 2,50
007.3603552
Standard request
 360,00 355,00 25,00 2,50
007.3703651
Standard request
 370,00 365,00 15,00 2,50
007.3703652
Standard request
 370,00 365,00 25,00 2,50
007.3803751
Standard request
 380,00 375,00 15,00 2,50
007.3803752
Standard request
 380,00 375,00 25,00 2,50
007.3903851
Standard request
 390,00 385,00 15,00 2,50
007.3903852
Standard request
 390,00 385,00 25,00 2,50
007.4003951
Standard request
 400,00 395,00 15,00 2,50
007.4003952
Standard request
 400,00 395,00 25,00 2,50
007.4504451
Standard request
 450,00 445,00 15,00 2,50
007.4504452
Standard request
 450,00 445,00 25,00 2,50
007.5004951
Standard request
 500,00 495,00 15,00 2,50
007.5004952
Standard request
 500,00 495,00 25,00 2,50
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