9.52mm Fin die

Ribbon-type progressive fin die, 12 rows × 2 progressions, punching 24 holes per stroke. Fin hole is Φ9.85mm ±0.03mm, staggered pattern, 25.4mm pitch within a row and 22mm pitch between rows. Material: aluminum 8011 (H22 or O temper) or copper, 0.105–0.12mm thick, on a suggested stock width of 276–278mm. Achievable collar height for 0.105–0.12mm aluminum runs 9–18 FPI — actual results depend on fin stock quality and lubricant, and thicker material or a non-evaporative lubricant may be needed to reach the higher end of that range. Row cutting is available in widths of 1, 2, 3, 4 or 6 columns, switched quickly with a single pressing-pad; row-slitting and side-trim blades are both a rippled profile. Fin surface is plain or V-waffle, with collar base included. Feeding is pull-type: spring-activated fingers register into the pre-formed holes and carry the material forward. Cut-off uses insert blades in a gag-type guillotine design, actuated by air cylinder and programmed from the press-mounted electronic counter — fin length is set by stroke count. Die construction: Draw Stations (5–6 steps), Pierce/Extrude Station, Re-flare Station, Edge Trim & Pilot Station, Row Slitting Station, Feed Station and Cut-Off Station. Draw and re-flare dials are individually calibrated with digital position indicators for fast changeover between collar settings. The re-flare station uses a stripper plate to protect the fin surface, with a manually adjusted wedge covering the full collar-height range. Ball bushings are used throughout the main die set. Build quality: cutting inserts are ASP30 (Sweden) tool steel or equivalent; pattern plates, holders and stripper plates are NAK80 (Japan) tool steel; standard hardware (screws, springs, guide bushings and posts) is MISUMI (Japan). Runs on a 45T C-type fin press (e.g. ZCPC45) with single/double progression change capability, and pairs with a 2-station left-right shuttle stacking system. Quality assurance: cutting parts are rated for 25 million strokes per regrind, with up to 10 regrinds over the die's service life. Warranty is 1 year from commissioning.