Merkel Guide Ring Guivex SBK

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Esmond Benson
6 years ago
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Product description Guide rings for piston rods can be used for very heavy loads

The profiling (patented) on the static side of the guide ring ensures an even

Product advantages Merkel guide ring SBK offers clear advantages against

lateral forces are evenly distributed along the length of the guide ring; as a

edge breaks optimal utilisation of guide length permits a shorter length and the

encourages the entry of hydraulic oil between the guide ring and the contact area

(patent-no. PCT/ EP95/03874) Application Mobile hydraulics, heavy duty hydraulics.

laminate Designation Operating conditions Temperature range in C GW G517/

1 Product description Guide rings for piston rods can be used for very heavy loads in hydraulics. The profiling (patented) on the static side of the guide ring ensures an even distribution of stress. Product advantages Merkel guide ring SBK offers clear advantages against conventional guide strips and guide rings: replace costly metal guides the lateral forces are evenly distributed along the length of the guide ring; as a result large radial loading possible no stress peaks in the area of the edge no edge breaks optimal utilisation of guide length permits a shorter length and the overload limit is much higher the stress distribution in the contact zone encourages the entry of hydraulic oil between the guide ring and the contact area the total friction and wear are considerably reduced patented product design (patent-no. PCT/ EP95/03874) Application Mobile hydraulics, heavy duty hydraulics. Diameter 300 Designation Fabric-base laminate GW G517 Diameter > 300 Fabric-base laminate Designation Operating conditions Temperature range in C GW G517/ ydraulic oils L, LP Temperature range in C GW G517/ Water ETG (rapeseed oil) FA fluids FB fluids FC fluids EES (synthetic esters) EPG (glycol) Mineral greases FD fluids

2 Rod Seals Surface quality Surface roughness R a R max Sliding surface 0,05 0,3 mm 2,5 mm Groove base 2 mm 10 mm Groove flanks 3 mm 15 mm Percentage contact area M r >50% up to max. 90% at cutting depth c = Rz/2 and reference line C ref = 0%. Design notes Please observe our general design notes in Simrit Standard Catalogue, Merkel ydraulics Technical Principles. Tolerance recommendation D 1 8 The tolerance recommendation for dimensions D and df must be regarded in conjunction with the seal being used. The diameter d1 stated in the dimensional table must be seen solely with reference to the guide ring. The corresponding diameter of an adjacent seal installation space must be matched to the sealing element involved. Manufacturing tolerance Profile thickness S 0,01 0,06 Surface load p <80 N/mm² up to 60 C For sliding speed, see sealing system. p <40 N/mm² up to 100 C Surface force The distribution of compression on the guide bushings is not linear. When determining the permissible specific compression per unit area, the non-linear characteristic of the compression over the contact area has been taken into account The permissible loading on the guide strip is calculated by multiplying the projected area by the permissible specific compression per unit area. The depiction here shows the ideal case with parallel loading. The figure given for the permissible specific compression per unit area, however, takes into account the possible angular offset of rod or piston when the recommended guide elements are used. F F F = P x A A = d x = guide strip width F = radial loading A = projected area P = perm. compression per unit area d = rod diameter with rod guidance; piston diameter with piston guidance 2

3 Article list d D F D F1 Profile L GW G ,6 2,5 9,7 9, ,6 2,5 9,7 9, ,6 2,5 9,7 9, ,6 2, , ,6 2,5 9,7 9, ,6 2,5 9,7 9, ,6 2, , ,6 2, , ,6 2,5 9,7 9, ,6 2,5 9,7 9, ,6 2, , ,6 2,5 9,7 9, ,5 4, , ,6 2,5 9,7 9, ,6 2, , ,6 2, , ,6 2, , ,6 2,5 9,7 9, ,5 4, , ,6 2, , ,6 2, , ,5 4, , ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,5 4, , ,5 4, , ,6 2, ,

4 Rod Seals d D F D F1 Profile L GW G ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,5 4, , ,6 2, , ,6 2, , ,6 2, , ,5 4, , ,6 2, , ,6 2, , ,5 4, , ,6 2, , ,5 4, , ,6 2, , ,6 2, , ,5 4, , ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,5 4, , ,6 2, , ,5 4, , ,6 2, , ,6 2, , ,6 2, , ,5 4, , ,5 4, ,

5 d D F D F1 Profile L GW G ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,5 4, , ,6 2, , ,6 2, , ,6 2, , ,6 2, , ,5 4, , ,5 4, , ,6 2, , ,6 2, , ,5 4, , ,6 2, , ,5 4, , ,5 4, , ,5 4, , ,6 2, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,6 2, , ,6 2, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,6 2, ,

6 Rod Seals d D F D F1 Profile L GW G ,5 4, , ,5 4, , ,5 4, , ,6 2, , ,5 4, , ,5 4, , ,6 2, , ,6 2, , ,6 2, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,6 2, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,6 2, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,6 2, ,

7 d D F D F1 Profile L GW G ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,5 4, , ,6 1633,6 1628,1 4, , ,5 4, , Ordering example Type d D F L SBK Fabric-base laminate

Operating conditions. Surface roughness R a R max

Operating conditions. Surface roughness R a R max Merkel U-Ring NI 300 Merkel U-Ring NI 300 Asymmetrical sealing lips PUR profile ring Sealing edge Material Material Code Hardness Polyurethane 94 AU 925 94 Shore A Operating conditions Material 94 AU 925