High Speed Expanded Metal Machine: Match LNH25-25 or LN25-3 to Your Mesh Program

Start with the material and mesh envelope

LNH25-25 suits programs using sheet from 0.3 to 1.5 mm thick and up to 1,250 mm wide. LN25-3 suits thinner sheet, from 0.15 to 0.5 mm, with a maximum width of 400 mm. This is the first dividing line for a high speed expanded metal machine because it determines whether your incoming sheet fits the feed path.

The mesh dimensions also differ. LN25-3 has a 0 to 5 mm feeding distance and a 10 mm mesh length. LNH25-25 has a 0 to 10 mm feeding distance and a maximum LWD of 25 mm. Measure the sheet width, thickness and required mesh geometry from your filter-element drawing before weighing the control or drive specifications.

A compact filter-element work cell using thin, narrow sheet aligns with the LN25-3 envelope. A program that needs wider sheet, thicker stock or the larger stated LWD aligns with LNH25-25. Send the actual material range and mesh drawing with your inquiry so the selection is tied to the part, not just the machine name.

Compare the control and drive interface

Both models use PLC programmable control and a pneumatic clutch. LN25-3 uses its PLC for precise mesh-length setting. LNH25-25 also provides PLC mesh-length setting, while its operating system tracks punching cycles and feeding distance. The two machines therefore share the main control and clutch categories, but their stated feed ranges remain different.

The pneumatic connection belongs in your installation plan for either model. Allow access around the clutch, feeder and punching area for routine inspection. LNH25-25 is specified with a 0 to 10 mm feed range, twice the upper feed value stated for LN25-3. That difference matters when your target mesh requires an increment above 5 mm.

The control interface should be discussed together with the mesh drawing. State the required mesh length, LWD and opening sizes, then identify whether the job uses the full 0 to 5 mm or 0 to 10 mm feeding-distance range. This gives the supplier a usable operating target for the selected machine.

Read the speed figures in their original format

LN25-3 is listed at 400 to 500 pcs/min and uses a 4 kW motor. LNH25-25 is listed at 500 times/min and uses a 5.5 kW motor. The speed units are expressed differently, so treat them as model-specific figures and compare them with your required mesh geometry and production cycle instead of converting them into one throughput claim.

The motor rating affects factory planning. Reserve the electrical capacity and connection arrangement for the selected model, then keep the machine's material envelope beside the electrical information during layout review. LN25-3 combines the smaller width and thickness ranges with the 4 kW configuration. LNH25-25 combines the wider and thicker envelope with the 5.5 kW configuration.

Picture two work cells before ordering. The LN25-3 cell receives sheet no wider than 400 mm and produces the stated 10 mm mesh length. The LNH25-25 cell receives sheet up to 1,250 mm wide and works with a maximum LWD of 25 mm. The usable space, incoming coil or sheet format and collection arrangement should be planned around the chosen envelope.

Check materials and mesh changeover

Both machines list steel, aluminum, stainless steel, copper and nickel as compatible materials. That shared list gives you a common starting point for comparing material choice. LN25-3 also describes low carbon steel and magnesium alloys in its feature information, while LNH25-25 describes low carbon steel and aluminum magnesium alloy. Use the exact material grade and thickness from your part program when asking for a configuration review.

Both models use replaceable upper cutters for different mesh opening sizes. This matters when one machine must produce several filter-element designs. Prepare the opening sizes, mesh length or LWD and the associated sheet thickness as one tooling schedule. The cutter requirement should follow the part drawings, especially when the job changes between designs.

The material decision and the machine decision are linked. A 0.15 mm sheet points to the LN25-3 thickness envelope, while a 1.5 mm sheet points to the upper end of the LNH25-25 range. Width and mesh geometry still need to be checked at the same time, since thickness alone does not define the required machine.

Build maintenance around the active functions

LN25-3 identifies monitoring of pneumatic components and electrical parts for preventive care. LNH25-25 identifies systematic monitoring of pneumatic components and electrical parts, along with tracking of punching cycles and feeding distance. Both machines include functions that should be accessible to operators and maintenance staff around the feeder, PLC interface, pneumatic clutch and upper cutters.

The tooling routine is also part of maintenance planning. Since both models use replaceable upper cutters, provide a controlled place for the cutter sets associated with each mesh opening. Record the opening size with the relevant sheet range and drawing so a changeover does not separate the tool from the product specification.

For a buyer comparing operating requirements, the maintenance difference is mainly the scale of the working envelope and the details each machine monitors. LN25-3 requires planning around its 0 to 5 mm feed range and 4 kW motor. LNH25-25 requires planning around its 0 to 10 mm range, 5.5 kW motor and wider material path.

Questions to resolve from the part drawing

Select the machine that fits the complete drawing

Choose LNH25-25 for sheet up to 1,250 mm wide, thickness from 0.3 to 1.5 mm, a 0 to 10 mm feeding distance or a maximum LWD of 25 mm. Choose LN25-3 for 0.15 to 0.5 mm sheet, 400 mm maximum width and a 10 mm mesh length. Send the drawings, material grades, thickness range, width, mesh dimensions, opening sizes and planned quantity for a quotation.