SUGGESTIONS ON THE ADJUSTMENT AND USE OF

No. 6900 Armstrong Band Saw Shaper
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Table of Contents
  1. Centering The Side Dies and Locating The Handle
  2. Adjustment For Width of Point
  3. Nos. 6900-B Shaper Alignment
  4. Shaping More Than One Thickness of Saw
  5. Swaging for Proper Tooth Point
  6. Effects of Improper Swaging
  7. Operating Instructions For No. 6900-BA Air Shaper
  8. Lubrication
  9. Side Die and Tooth Stop Selector
  10. Side Die Grinding Nomenclature
  11. Information For Ordering
CENTERING THE SIDE DIES AND LOCATING THE HANDLE

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  1. Release the large knurled bushing by loosening the spanner locknut with the spanner wrench.
  2. Hold the operating handle above the shaper in a vertical position, adjust the right hand side die by turning the knurled bushing clockwise so that the side die contacts the saw plate in approximately the center of the observation hole in the top of the shaper head.
  3. With the operating handle still in the vertical position, adjust the left hand side die by turning the hollow head cap screw into the shaper head until the side die contacts the saw plate.  Use a 3/8" Allen key.
  4. Adjust the operating handle to a suitable working position by adjusting the hollow head cap screw outward from the shaper head to lower the handle or into the head to raise the handle.
  5. With the adjustments complete, tighten the spanner locknut with the spanner wrench.
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ADJUSTMENT FOR WIDTH OF POINT

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The side dies are factory ground to your specifications.
The dies are ground so that they will produce the desired kerf, or width of finished point, with the tooth stop in the rearmost position.
1/8" adjustment of the tooth stop is provided so that the width of the finished point can be increased as needed up to the following amounts:
With dies ground to 2 degree back clearance: .005"
With dies ground to 4 degree back clearance: .010"
With dies ground to 8 degree back clearance: .020"
Standard back clearance angles are 8 degrees tangential or "back" and 3 degree radial or "side" unless otherwise specified.
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NO. 6900-B SHAPER ALIGNMENT

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No. 6900 Shapers all require the wear shoes to be in line with the bottom of the slot in the shaper head.  A straight edge should be used to ensure proper alignment of both wear shoes to the shaper head.
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SHAPING MORE THAN ONE THICKNESS OF SAW
Because the clearances are ground into the dies, and the fact that the clearance of the finished point is always in relation to the thickness of the plate, the 1/8" movement of the tooth stop often makes it possible to use the shaper on more than one thickness of saw without changing side dies.
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SWAGING FOR PROPER TOOTH POINT
The No. 6900 shapers are designed for maximum uniformity, and the saw itself acts as the stop for the side dies.  As a result, it is important to swage to the proper amount.  Generally this will be less than is common with older type shapers.

This has the advantage of producing less work hardening, and less crumbling of the tooth point.

In some instances the corner produced on the tooth point may not be as heavy as with the older swaging and shaping procedure.  Any reduction in corner, however, is more than out-weighed by the accuracy and precision provided by the No. 6900 shaper and not sufficient to cause a problem.

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EFFECTS OF IMPROPER SWAGING
Swaging the tooth point too wide or too narrow will have the following effects:
  1. Too wide a point provides more than enough material to produce the tooth point, as called for by the clearances ground into the side dies.  The result is an upward bulge on the tooth, and the width of the point should be reduced.
  2. Swaging too thin a point can also cause an upward bulge or bend on the tooth point.   In this case the bend upward is the result of too little material  To correct this condition, leave the cutting edge area of the point thicker by rolling the swage die back, or stopping the action of the swage die just ahead of the anvil.
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OPERATING INSTRUCTIONS FOR NO. 6900-BA
ARMSTRONG AIR DRIVEN SHAPER
  1. 1/4" air hose is used (same as at service stations).
  2. Suggested operating air pressure: 80 lbs. maximum, 60 lbs. minimum.
  3. We suggest the use of an air regulator and gauge to control the pressure, in addition to the usual shut-off valve in the air line -- it is not possible to control the pressure with the shut off valve, as it merely restricts the flow and the pressure remains the same.
  4. Regulator and gauge should be placed in the air line near the operation, but not attached to the shaper due to the weight.
  5. Use of the lubricator supplied with each shaper is recommended to keep the valve and cylinder well lubricated.
  6. Speed of cylinder stroke can be controlled by two screws located on the side of the valve directly below the operator's finger tips when the hand is on the valve handle and trigger.
  7. Shaper adjustments are the same as those required on an Armstrong No. 6900 hand shaper.
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LUBRICATION
All units are lubricated at the factory.  The moving parts (side die and clamp screw) will need lubrication with either oil or grease as necessary to reduce wear.
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SIDE DIE AND TOOTH STOP SELECTOR
To calculate side clearance: Shallow Tooth Range Deep Tooth Range
Saw kerf              .125
16 gauge saw   (-).065
.060 divided by 2
Clearance per side .030
16 gauge saws and thinner
11/16" deep and shallower:
   6982 side dies
   6983 tooth stop
15 gauge saws and heavier
3/4" deep and deeper
   6980 side dies
   6981 tooth stop
 
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SIDE DIE GRINDING NOMENCLATURE

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INFORMATION FOR ORDERING
The following specifications are needed to adapt your new shaper to your exact requirements:
  1. Thickness of the saw.
  2. Width of the finished point.
  3. Standard back and side clearances are 8 degrees x 3 degrees, and will be furnished unless otherwise specified.
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Copyright(c) 1998-02, Armstrong Mfg. Co., All Rights Reserved
2700 SE Tacoma St., Portland OR  97202
voice: 800-426-6226  fax: 503-228-8384
e-mail: info@armstrongblue.com

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