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Allpax SM4 Operating Instructions Manual

Allen rotary-style gasket cutter
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Model SM4
Allen Rotary-Style Gasket Cutter
Operating Instructions

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Summary of Contents for Allpax SM4

  • Page 1 Model SM4 Allen Rotary-Style Gasket Cutter Operating Instructions...
  • Page 2 Congratulations! You are the owner of the finest rotary-style gasket cutter in the world. Originally developed and patented in the 1930’s, the heavy-duty Allen SM4 Rotary-Style Gasket Cutter is ideal for the custom fabrication of both metallic and non-metallic ring and flange gaskets. Thousands are in use everyday in a wide range of industries including petrochemical plants, shipyards, power plants, breweries, pulp and paper plants, refrigerated facilities, and oil refineries.

  • Page 3: Operating The Unit

    (Figure 1) Model SM4 is a heavy-duty unit and is typically bolted to the flat surface of a workbench using the four 3/8” diameter holes on the mounting base.
  • Page 4 (Figure 4) Unscrew and remove the scale bar knurled nut from the scale bar assembly. NOTE: The SM4 scale bar knurled nut incorporates a left-hand thread. Using the guide hole, position the gasket material onto the threaded scale bar spindle. Screw the knurled nut back onto the spindle to firmly secure the material.
  • Page 5 BOTTOM CUTTER REPLACEMENT NOTE: For the steps that follow, first disengage the cutting disc lever. (Figure 10B) Remove gear guard by loosening two hex head cap (Figure 10A) To replace the bottom cutter, other components of the screws using 7/16” wrench. Pull off gear guard. unit must be removed first to gain access to the bottom cutter.
  • Page 6 BOTTOM CUTTER REPLACEMENT (continued from page 5) (Figure 10E) Remove bottom cutter support bearing by removing two socket head cap screws holding the bottom cutter support bearing in place. There are two locating pins which align the bottom cutter support bearing to the frame assembly. The pins do not need to be removed, but you may need a non-marking hammer to help ease the bottom cutter support bearing from the frame assembly as the pins fit tightly.
  • Page 7 TOP CUTTING DISC REPLACEMENT (Figure 11) Disengage cutting disc lever. Use spanner wrench (Figure 10H) Assembly is the reverse of the previous steps. (included) and place into corresponding holes in top cutting disc. The NOTE: When assembling the top shaft assembly, the top cutting disc is loosened by holding spanner wrench and turning the washer assembly for the top cutter lifter bearing must be crank handle counter-clockwise.
  • Page 8 CUTTER ADJUSTMENTS The positions of the cutting discs are pre-set at the factory. However, Clearance Adjustment (x axis) over time, as cutting discs wear and/or are replaced, adjustments may First, set the initial clearance between the bottom cutter (B) and top need to be made to maintain proper operation.
  • Page 9 CUTTER ADJUSTMENT DIAGRAMS DETAIL BB DETAIL AA NOTES: 1.Wrench size for inner and outer hex nuts – 9/16” 2. Wench size for jam nut – 1-5/16” 3. Wrench size for depth adjustment locking nut – 7/16” 4. Use 0.003 shim stock to adjust clearance (x-axis) DETAIL AA DETAIL BB (Figure 16)
  • Page 10 GENERAL MAINTENANCE AND LUBRICATION (Figure 17) The Model SM4 is pre-lubricated at the factory. Like any piece of precision machinery, regular cleaning and lubrication of all gears, and moving parts is recommended. Light machine oil should TO SEE THE SM4 IN ACTION periodically be applied to points A, B, C, D, E, F, G, and H.

  • Page 11: Replacement Parts

    REPLACEMENT PARTS Replacement parts are available from your local distributor or direct from the factory. Contact our Customer Service Department for pricing information. ITEM PART NO DESCRIPTION M413 STANDARD SCALE BAR (2”-28”) M413A MEDIUM SCALE BAR (28”-54”) M413B LONG SCALE BAR (54”-80”) M420 SCALE BAR KNURLED NUT M414...
  • Page 12 HOLLOW PUNCH TOOLS & HAMMERS Technical Specifications Also available from Allpax Gasket Cutter Systems Cut perfect bolt holes, washers & sealing rings. Select the desired diameter cutting head, snap onto handle, position on top of gasket material, and strike! Hollow Punch Tool Kit (27 piece kit shown) HOLLOW PUNCH TOOL KITS Available in Standard (1/8”...