In addition to improved speed, the Armstrong 3-10-C stretcher roll provides greater uniformity and control over the tensioning process and gently rolls the same tension all around the saw.
Eccentric Mandrel: The eccentric mandrel on the stretcher roll can be adjusted so that the crown travels in concentric rings on the saw or in a spiral. When placed perpendicular to the radius of the saw, the rings will be concentric. Moving the eccentric mandrel slightly off-center will create a spiraling of the crown on the saw.
Available: The 3-10-C accommodates saws up to 36" in diameter. When tensioning a 36" saw, the 3-10-C rolls to within 7" of the center of the saw. On smaller saws, operators are able to tension even closer to the eye. The unit uses a 1 HP motor for standard alternating current, magnetic switch, convenient foot pedal and a standard four-step centering bushing.
SPEED: Filers can perform the task of tensioning saws much quicker than by hammering - as much as 10 to 20 times faster.
UNIFORMITY: Stretcher rolls tension saws smoothly and uniformly from the center of the saw to the gullet line.
HAMMER MARKS ELIMINATED: Eliminating hammer marks helps to ensure top performance from even thin kerf saws, such as those used on modern guided multi-saw rip machines.
HEAVY-DUTY BUILD: The sturdy cast-iron or steel frame, steel floor stand and heavy-duty anti-friction bearings assure years of trouble-free service. A 1 HP motor provides power to tension even the heaviest gauge saw.
CONVENIENCE: The foot pedal control starts and stops the rolls. The saw quickly adjusts in and out on steel rails for precise positioning of the rolls.
OPTIONS AND ACCESSORIES:
STEPPED SAW CENTERING BUSHING: Each machine comes with a stepped bushing to handle saws with center holes of 1", 1-1/8", 1-1/4", 1-38". Single step bushings for larger eyes are available at extra cost. A special mandrel is also available for saw bores down to 1/2".
DIAL INDICATING PRESSURE SCREW: Completely interchangeable with the standard screw, the optional dial indicating pressure screw shows the amount of pressure being applied to the saw directly on the dial. This option is very useful in maintaining and repeating the correct pressure and in training new filers.
LEVELING ATTACHMENT: The hardened and crowned rollers are set to the desired height and the tensioning rolls pull the saw through without adding tension. The optional attachment is quickly installed and removed and is used for both standard circle and Strob saws.
STRETCHER ROLLS: The standard tensioning rolls included with each machine are ground to a 4" crown. This crown works very well on a wide range of circle saws.
LEVELING ROLLS: A concave leveling roll is available. Armstrong's part number 7337 is a fully concave roll, ideal for all saws.
CAPACITY: 36" diameter saws, tensioning to within 7" of saw center (92 cm saws, tensioning to within 18cm of saw center) 75" diameter saws, tensioning to within 9-1/2" of saw center (190 cm saws, tensioning to within 25 cm of saw center)
MAX. GAUGE: 4 gauge (.238" or 6.04cm)
STANDARD FEED: 40 feet/minute (12 meters/minute)
MOTOR: 1 HP gearhead (.75 kilowatts)
HEIGHT OVERALL: 58" (147.3 cm)
FLOOR SPACE: 21" X 41" (53.3 cm X 104.1 cm)
WEIGHT, TRUCK CRATE: 700 lbs. (320 kg)
WEIGHT, OCEAN CRATE: 800 lbs. (370 kg)
CUBIC FEET: 53 cu. ft. (1.5 cu. meters)
Prices for circular saw stretcher rolls include gearmotor and starter for standard alternating current, foot switch with low voltage control, eccentric mandrel, steel floor base and one 4-step bushing for saw eyes 1", 1-1/8", 1-1/4", and 1-3/8".
PART NUMBER DESCRIPTION
6929 Single step bushings for large saw eyes
6806 Leveler attachment
7337 Leveling roll concave
6934 Tensioning rolls (4" radius, standard)
8042 Dial indication pressure screw