ACCURATE
Armstrong's No. 6900 Shaper is the most
accurate shaper available and perhaps the easiest to adjust and operate. Precision
shaping is essential to kerf control and smooth sawing. Use of the 6900 contributes
to a smoother, more accurate cut which can reduce the allowance needed for planing.
Armstrong incorporates two key features to insure this level of accuracy.
- The 6900 uses a "shovel point" tooth stop which
locates just below the swaged point on the ground surface of the tooth. This
location is always uniform, unlike the swaged point which is often irregular.
- Custom ground side dies clamp the saw plate with up to 4 tons
of pressure. Side dies are individually ground according to customer specifications
to provide the exact clearance required.
EASY TO ADJUST AND USE
The No. 6900 Shaper requires very little
set-up before it is ready for operation. Since clearance angles are ground directly
into the side dies, these adjustments are "pre-set" at the factory.
Adjusting for kerf and centering on the saw are accomplished in a few quick steps.
In minutes, the No. 6900 Shaper is precisely adjusted for your specific needs.
AIR DRIVEN SHAPER (OPTIONAL)
Armstrong offers an air driven version of the 6900-B band saw
shaper. The 6900-BA was designed for those preferring an air shaper. |
| Armstrong Air Shapers Offer: |
- Easy adjustment of cylinder speed with two needle valves.
- A well balanced tool, with the weight of the cylinder evenly
distributed.
- Lubricator supplied with each air shaper.
|
INFORMATION FOR ORDERING
ONE SIZE ONLY: The No. 6900 Shaper is made in one size
only and performs equally well on both thin and heavy gauge saws. |
| ESTIMATED SHIPPING WEIGHTS |
Pounds |
| 6900-B Hand Operated |
15 |
| 6900-BA Air Operated |
35 |
|
| THE FOLLOWING
SPECIFICATIONS ARE NEEDED TO ADAPT THE SHAPER TO YOUR EXACT REQUIREMENTS: |
- Thickness of the saw
- Width of finished point
- Standard 8 degree back x 3 degree side clearances will be
furnished unless otherwise specified
|
|
MANUFACTURING COMPANY
5504 S 11th St, Ridgefield, WA 98642 USA
(503) 228-8381 Fax: (503) 228-8384
www.armstrongblue.com
|
| Armstrong
No. 6900 Shapers for band, circular and sash gang saws |
PRECISION SHAPING
THROUGH INNOVATIVE DESIGN
Increased precision, offered by the No. 6900 Shaper, comes
through new ideas in design: |
- Clearances are pre-ground into the side dies, producing the exact
same width and shape of tooth point time after time.
- If desired, the 6900 is quickly adjusted for a wider
point. The tooth stop can be moved to increase the width of the point .020"
with standard 8 x 3 degrees back and side clearance.
- The position of the clamping lever on the shaper is easily
changed for operator comfort. A positive locking arrangement holds the lever firmly
in place.
- A new, heavy duty pressure screw design applies approximately
four tons of pressure to the tooth point.
- The shaper operates on the "impact" principle.
The saw itself acts as the stop for the side dies. When they contact the saw, no
further pressure is needed. There is little or no tendency to make an incomplete
stroke of the die lever.
- The rugged "shovel point" tooth stop is designed to
contact the saw just below the swaged point where the surface is consistent and uniform.
|
|
Since side dies are
pre-ground to the exact clearance required by the customer, the following information must
be provided: |
- the width of the finished point
- the thickness of the saw plate
- depth of gullet
Shown below is an example of how side clearance is
calculated:
| Finished point (saw kerf) |
.125" |
| Subtract saw plate (16 gauge saw) |
(-) .065" |
| Total clearance |
.060" |
| Divide .060 by 2 |
.030" |
(half the clearance on each side of
the saw)
Clearance per side is .030" |
|
|
EASY
MAINTENANCE The No. 6900
Shaper is easy to maintain since there is a minimum of moving parts. All critical
parts are made of hardened steel for long wear and are ruggedly designed to withstand the
pressure applied.
A slight bulge on the side of the finished
tooth point indicates it is time to replace the side dies. Side dies may be sent to
Armstrong for prompt regrinding at a reasonable cost. Side dies may also be ground
to different clearances if a change is made in the saw specifications.
Carbide for Longer Wear
Armstrong recommends the use of carbide parts whenever possible. Carbide side
dies last longer, work better and cost less in the long run.
SIDE DIE AND TOOTH
STOP SELECTOR:
Deep Tooth Range
3/4" deep and deeper: |
- 6980 side dies
- 6981 tooth stop
(If an order is received without the gullet depth noted, we
will assume when the saw is 15 gauge or heavier that there is a minimum of 3/4"
gullet.) |
Shallow Tooth Range
11/16" deep and shallower: |
- 6982 side dies
- 6983 tooth stop
(Under normal conditions, the No. 6900 cannot be used on saws
with less than 1 1/2" tooth space or 1/2" gullet depth.) |
CLEARANCE ANGLES
An eight degree back (tangential) angle and
three degree side (radial) angle are standard on the No. 6900 Shaper. These are the
same clearance angles used by other Armstrong shapers that have proven to be optimal in
the majority of cases. This tooth point geometry provides good wear on the tooth
point and allows maximum adjustment of the overall side clearance.
If desired, more or less back and side
clearance angles can be ground into the side dies at no additional cost. |
|
