Wipers
A wiper is a seal mounted at the outermost end of the rod exit in hydraulic and pneumatic cylinders. As the rod retracts, it scrapes dust, mud, water and other contaminants from the rod surface and prevents them from entering the interior. By blocking foreign matter, it reduces wear of rod seals and guides and limits contamination of the hydraulic fluid. Single-acting types have a lip on the outside only, while double-acting types add an inner lip that also controls the residual oil film. Installation methods include the snap-in type, which fits into a groove, and the type with a metal or resin retaining ring that is press-fitted into an axially open housing. Materials include PU (polyurethane), NBR, and PTFE combined with an O-ring. Wipers are used in cylinders for construction and industrial machinery, and in hydraulic equipment.
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Wipers
Wiper (Single-Acting Wiper A01/A04 Series)
Standard wiper for removing foreign matter adhering to rods in hydraulic equipment. Snap-in installation allows easy mounting and offers excellent wear resistance.
SKF
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Wipers
O-Ring Integrated PTFE/TPU Rod Wiper (A02/A05/A11/A12 Series)
PTFE/TPU wiper with integrated O-ring. Supports single-acting and double-acting use and is used in combination with seal (S09).
SKF
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Wipers
Rod Wiper (A03/A06 Series, Press-Fit Type)
Single-acting wiper pressed into an axially open housing. Equipped with a resin retaining ring.
SKF
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Wipers
Wiper Seal (A01-A to A12-B)
Wiper seals installed at the outermost end of hydraulic and pneumatic cylinders to prevent foreign matter ingress. Available in many profiles for single-acting and double-acting types, according to ISO standard housings.
SKF
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Wipers
Wiper Seal A13-A
Model: A13-A
Single-acting wiper for hydraulic and pneumatic cylinders. Removes adhered foreign matter, mud, ice and similar contaminants, preventing damage to the elastomer wiper located behind it.
SKF
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Wipers
Wiper Seal A25-F
Model: A25-F
Single-acting wiper seal with built-in O-ring. Reduces friction and stick-slip, and follows rod eccentricity.
SKF
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Wipers
Double-Acting Wiper Seal A26-F
Model: A26-F
Double-acting wiper seal with built-in O-ring. Reduces friction and follows rod eccentricity.
SKF
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Wipers
Double-Acting Wiper Seal A27-F
Model: A27-F
O-ring energized wiper seal for double-acting applications. Compensates for radial eccentricity and reduces oil film with an inner lip.
SKF
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Wipers
Wiper (A03/A06 Single-Acting Wiper for Axially Open Housing)
Model: A03 / A06
Press-fit single-acting wiper for axially open housings. Uses a resin retaining ring and is resistant to oxidative corrosion.
SKF
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Wipers
Wiper (A01/A04 Single-Acting Wiper)
Model: A01 / A04
Standard single-acting wiper for hydraulic and water hydraulic equipment. Easy snap-in installation, excellent wear resistance, and a closed design that seals against the system exterior.
SKF
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Wipers
Wiper (A02/A05/A11 Single-Acting/Double-Acting Wiper)
Model: A02 / A05 / A11
Single-acting/double-acting wiper used in combination with a PTFE rod seal paired with an O-ring. Features excellent wear resistance and double-acting function.
SKF
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Wipers
Wiper
A seal product group that removes foreign matter from the rod surface. It is listed in the table of contents of this document, but the body text is not included in the excerpt.
SKF
How to choose Wipers
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1. Select a size that matches the rod diameter
Wiper dimensions are determined by the applicable rod diameter d, and listed products cover a range of 6 to 600 mm. If the inner diameter does not match the rod, insufficient scraping allows contaminants to enter, while excessive tightening causes wear and heat generation. Check the actual rod outer diameter and tolerance before selecting.
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2. Match the housing groove dimensions and standards
Wipers are designed to suit the shape of the housing groove in which they are installed. Confirm the housing groove width (1 to 3 mm for listed products) and which housing type of standards such as ISO 6195 the wiper is compatible with. When replacing parts in existing equipment, measure the actual groove dimensions before selecting.
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3. Check installation space by overall height
Overall wiper height directly affects the axial installation space, and listed products range from 7 to 16 mm. Confirm that the wiper fits within the cylinder head design space and its arrangement with the rod seal and guide. Designs with greater overall height often provide more allowance for the lip and retaining section.
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4. Select a material suited to the fluid and environment
PU offers excellent abrasion resistance and is widely used in environments with heavy mud or dust. NBR is well known for its compatibility with hydraulic oils. PTFE combined with an O-ring suits applications where friction and stick-slip (catching motion) need to be reduced. Choose according to the type of hydraulic oil and whether the application is for water hydraulics.
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5. Confirm the operating temperature range
Rubber and resin wiper materials degrade or harden at high temperatures and lose elasticity at low temperatures, which reduces scraping performance. For outdoor cold-region use or machines running high-temperature hydraulic oil, confirm that both ambient and oil temperatures fall within the operating temperature range.
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6. Choose single-acting or double-acting and the sliding conditions
Consider a double-acting type when you do not want residual oil film carried outward, or when combining with a PTFE rod seal. In environments where mud or ice adheres, designs that remove adhered foreign matter at the front stage are also used. Also confirm that the maximum sliding speed (1 to 10 m/s for listed products) exceeds the rod speed.
This guide was written by AI based on the listed products' documents and specification items. Check each manufacturer's documents before adopting.