Special Piston for ram presses

In manual lubrication technology, special pistons form the central transmission element within a push-type pressure pump. Their task is to convert the operator's axial force into hydraulic pressure in order to deliver the lubricant – grease or oil – precisely through the lubrication channel to the point of action. Special pistons from ABNOX are specifically matched to the mechanical tolerances of the cylinder housings to prevent leaks in the low-pressure range and ensure a constant delivery rate per stroke.

The efficiency of a push-type pressure pump depends significantly on the fit and surface quality of the piston. Special pistons must be designed to displace both low-viscosity oils and viscous greases without significant pressure loss. In industrial maintenance, this is crucial for overcoming the flow resistance of resinified lubrication points. Furthermore, exact guidance within the cylinder prevents tilting, which increases the mechanical service life of the entire pump.
 

Product Specification

Manufactured from high-strength, low-wear materials with precision-ground surfaces. These pistons are specifically designed for use in ABNOX push-type pressure pumps and guarantee an optimal seal against the inner cylinder wall. The choice of material is optimized for chemical resistance to mineral oils and synthetic lubricants to prevent swelling or embrittlement of the sealing edges. Thanks to the exact dimensional accuracy, a constant media flow is generated with every stroke, enabling reproducible lubricant application.

• Optimized Sealing Lips: 
  The geometry of the piston edges is designed to provide maximum sealing during the forward stroke while allowing the medium to flow smoothly from the reservoir during the return stroke.
• High Mechanical Load Capacity: 
  Use of materials that show no plastic deformation even under high manual forces and frequent load cycles.
• Minimal Friction Coefficients: 
  The surface finish reduces the breakaway force and sliding resistance, which improves ergonomics in manual operation and lowers the physical effort required.
• System Compatibility: 
  The special pistons are available as replacement or conversion components and fit exactly into the corresponding ABNOX handheld device series, thereby maintaining the integrity of the tribological chain.

The use of ABNOX special pistons in push-type pressure pumps ensures loss-free media transfer under industrial operating conditions. By avoiding internal leaks (bypass effect), lubricant consumption is controlled and contamination of the tool housing is prevented. The high manufacturing quality protects the polished cylinder running surfaces from scoring, which significantly extends the service life of the lubrication equipment. Consequently, these pistons form the technological basis for the reliable and cost-effective maintenance of bearings and gear components.