ENIGINE TURNING INSTRUCTIONS

     

    Introduction

    Engine turning (or demascening) has long been recognized as a hallmark of fine quality metalwork and engineering.  With Eastwood's Engine Turning Kit and your drill press, you can create a wide varity of custom designs on almost any metal surface.   This kit includes special solid abrasive cylinders with abrasive impregnated throughout a rubber bonding material.

    Contents

    Item-no #13117

    Engine Turning Kit 1" Diameter

     

  • Two- 1" Diameter solid abrasive rolls with threaded inserts
  • One- 1/4" Diameter Threaded Mandrel Instructions
  • Instructions

  • Item-no #13118 Engine Turning Kit, 1/2" Diameter

     

  • Two - 1/2"Diameter solid abrasive sticks (6" long)
  • Instructions

  • Other Suggested Products

    Item-no #13106 Stainless Steel and Steel Buffing Kit.
    Item-no #13104 Aluminum and Brass Buffing Kit.

    All the supplies you need to bring a like-new shine to metal pieces before damascening

    Item-no #13079 Expander Wheel
    Item-no #13139 ScotchBrite Expander Wheel Belts (Set 0f 3)

    Excellent for removing surface irregularities

    Engine Turning Instructions (cont'd)

    Safety Warning

    Always wear eye protection when working with a drill press and be sure those working around you or watching you are also wearing eye protection.  To gaurd against cuts from sharp metal edges, we also recommend wearing heavy cotton or leather work gloves while handling the metal pieces on which you are working.


    Preparation

    The surface of the metal on which you are about to work should be as smooth, flat, and clean as possible.  It is much easier and your results will be more consistent if you start with a flat piece of metal.  If the final installation requires that the piece be curved, do the engine turning while the piece is flat, then gently bend it for final installation.


    Abrasive Roll Setup

    (Item-no #13118)      1/2" Diameter Abrasive Cylinders with out Mandrel Kit.
    Cut the abrasive roll into 2" lengths.  Insert one of the pieces directly in to the drill press chunk, leaving no  more than 1" extending beyond the end of the chunk.  If you leave more than 1" exposed, the roll will tend to "wipe" the surface and result in out-of-round spins.

    (Item-no #13117)     1" Diameter Abrasive Cylinders With Mandrel Kit.
    Screw the threaded end of the mandrel into the abrasive roll and tighten the jamb nut.   Insert mandrel into drill press chunk.


    Drill Press Speeds

    The optimum RPM range is between 900 and 1400 RPM.  Experiment with slower speeds first and increase only if the results are unsatisfactory.


    Lubricant


    To get the maximum life from the abrasive cylinders and avoid discoloration of the metal caused by excessive heat, use a mixture of 25 parts water to one part oil (motor oil or machine oil).  Any penetrating spray will also work (WD40, 3-in1, CRC, etc.).   Oil after every spin or at least every other spin

    Establish a "Spin Pattern"

    "Spin Pattern" is the term used to describe the overlaping swirls resulting from engine turning.  The variety and complexity of possible patterns is entirely up to your imagination.  We recommend that you practice on some scrap pieces both to get the feel for engine turning and to decide what pattern you desire.

    Time Cycle and Spin Pressure

    Once you have decided on a pattern, it is important to note the amount of time and abrasive that was applied to the metal and the amount of  pressure used to achieve the desired effect.  For consistent results, the abrasive should be applied to the metal for exactly the same amount of time with the same amount of pressure.  Aviod applying too much pressure.  This will cause the end of the abrasive roll to "mushroom", which will result in inconsistent circle sizes.


    Helpful Tips for Damascening
    • Construct a work deck out of plywood, masonite, etc., and attach to the drill press deck.
    • Use a metal ruler as a guide fence while working.
    • DO NOT scribe the metal surface in areas where you want to spin.  Use adhesive tape or permanent markers to lay out guides.
    • Parts such as dashboards and firewalls should be cut from pre-spun sheets which have square corners.  It is much easier to keep spin patterns consistent on a piece which has squared edges.
    • Dress the abrasive cylinder approximately every six spins using 220 grit sandpaper.   This will remove particle build-up in the abrasive cylinders.  Use light pressure when dressing the cylinders