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The AM44 is a single-acting wiper for mobile hydraulics. The profile is installed around the moving piston rod and removes dirt and other contaminants from the rod surface during the retraction movement.
The wiping action is provided by a protruding TPU wiper lip. According to the data sheet, the AM44 is particularly suitable for applications with heavy contamination.
The AM44 consists of a TPU wiping section and a metal angle ring. The metal reinforcement is made of unalloyed steel according to DIN EN 10139, formerly DIN 1624.
The protruding wiper lip contacts the piston rod. The metal angle ring supports the profile in the installation space and prevents the wiper from twisting during operation.
The wiper lip protrudes from the profile and removes contaminants from the piston rod as it moves into the cylinder. According to the data sheet, the AM44 offers good wiping properties against dirt.
The profile is specifically suitable for applications with heavy contamination. For correct operation, the wiper lip must be combined with a piston rod that has a suitable surface quality.
The metal angle ring ensures a good fit of the AM44 in the installation space. The reinforcement also prevents the profile from twisting during piston rod movement.
The metal component is made of unalloyed steel according to DIN EN 10139, formerly DIN 1624. During selection, the TPU wiping section and metal reinforcement must be considered together.
According to the data sheet, the AM44 offers high wear resistance and a long service life. These properties support the use of the profile in mobile hydraulics and applications with heavy contamination.
The stated advantages apply within the specified operating limits. Temperature, sliding speed, medium, surface quality and installation conditions must therefore be assessed together.
According to the data sheet, the AM44 does not require a pressure relief hole. The profile is designed for an axially open installation space that is easy to manufacture.
The groove dimensions and installation chamfers must correspond to the installation-space drawing. The specified surface roughness values must also be observed in the design.
The AM44 wiper is intended for mobile hydraulics and is particularly suitable for applications with heavy contamination. The profile is described as a reliable design for moderately demanding applications in general industry.
The stated advantages include good wiping properties against dirt, high wear resistance, a long service life and an axially open installation space that is easy to manufacture. The AM44 also offers a good price-performance ratio and is manufactured by certified external suppliers.
The wiper lip of the AM44 is made of TPU. The metal angle ring consists of unalloyed steel according to DIN EN 10139, formerly DIN 1624.
The TPU section wipes the piston rod and supports the high wear resistance. The metal angle ring ensures a good fit in the installation space and prevents the profile from twisting.
The AM44 is suitable for hydraulic oils in accordance with DIN 51524 parts 1-3 and for lubricating oils. The profile can also be used with mineral oil-based lubricating greases.
The flame-retardant hydraulic fluids HFA, HFB and HFC according to VCMA 24317 are also specified. During selection, verify that the applied medium is suitable for the TPU and metal angle ring.
The AM44 has an operating temperature range from -30 to +100 °C. The maximum sliding speed is 2 m/s.
These operating limits are maximum values and may not all be reached simultaneously. Suitability should therefore be assessed using the complete combination of temperature, sliding speed, medium, surface quality and installation conditions.
Consult the valid material data sheet for current information about approvals and certificates. This information depends on the specific compound and therefore cannot be listed exhaustively for every version.
The cylinder housing and piston rod must be provided with chamfers to prevent damage to the wiper. The length and angle of these installation chamfers must correspond to the installation-space drawing.
The piston rod surface roughness must correspond to the specifications of the seal used. The groove flanks require a surface roughness of Ra ≤ 4 µm. The groove base must have a surface roughness of Ra ≤ 2.5 µm.
The AM44 is designed for an axially open installation space that is easy to manufacture. Before installation, verify that the groove dimensions and installation chamfers correspond to the installation drawing.
Deburr sharp edges and provide smooth chamfers and radii. Clean the installation space carefully before installation and remove dust, dirt, metal chips and other contaminants.
Store the AM44 at a temperature below 25 °C. Avoid direct sources of heat, direct sunlight and condensation in the storage area.
The wiper must not be exposed to ozone or ionising radiation. The storage recommendations are based on the revision of ISO 2230 dated 16 September 1992.
First check the required piston rod and axially open installation-space dimensions. Then assess whether the protruding wiper lip and metal angle ring are suitable for the application and expected level of contamination.
Also check the temperature range from -30 to +100 °C and the maximum sliding speed of 2 m/s. Assess the medium, piston rod surface quality, groove roughness and any compound-dependent approvals.
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