No. 3-10-C & 3-60-C SR Operating Instructions


6914, 7307,6923, 6925, 6946, 6942, 6947, 6941

Adjustments apply to both No. 3-10-C and No. 3-60-C Stretcher Rolls

A.  THRUST SCREW - Socket head screw is used to compensate for deflection of the top roll under load.  The adjustment is to make contact, then back off 1/8 turn, allowing the springs to function in lifting the top roll.

B. ECCENTRIC MANDREL - To correct spiraling action of the rolls on the saw, this mandrel may be moved as necessary to provide proper alignment of the saw to the center of the roll.

C. SAW CARRIAGE - The saw carriage is designed to slide freely on the saw support bars.

D. LEVEL SAW WITH ROLL - To avoid dishing action, the saw must be parallel to the saw carriage bars.  Raise or lower nylon-capped studs as necessary to level the saw.

E. SAW BARS - When shipped, the two bars which support the saw are parallel, and square with the roll.  If spiraling action of the roll is too great to be compensated for by the eccentric mandrel, check the bars and realign as necessary, using a carpenter's square placed against the face of the bottom roll.



Tensioning circular saws with a stretcher roll is standard practice in a rapidly growing number of filing rooms and saw shops.  Now there is much interest in the use of No. 3-10-C and No. 3-60-C Armstrong circular saw stretcher rolls for leveling saws as well.   The easily installed No. 6806 leveler has been a handy optional accessory in removing lumps and twists, and the following figures and comments show how it is used on both standard and Strob saws:
3-10-C levelling



There are two types of leveling rolls which are used to level saws that have been bent over the collars or guides and not cracked.  By using a standard roll and one of these leveling rolls, the job has proven to be a time and labor saver.

As shown in Figures 5A and 5B below, the leveling roll can easily be installed in place of the upper roll.  The saw is then placed so that the kink or bend is up.  With only a very few rolls around the saw, the bend can be straightened without adding tension to the saw.

The notched leveling roll (part number 7361) shown in Figure 5A is usually recommended for saws 14 gauge (.083) and thinner.

The concave leveling roll (part number 7337) shown in Figure 5B is usually recommended for saws 13 gauge (.093) and thicker.

Both leveling rolls have flat surfaces at either side of the grooves to assist in controlling the saw.  The leveling rolls are available as optional accessories.

3-10-C lev rolls

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2700 SE Tacoma St., Portland OR  97202
voice: 800-426-6226  fax: 800-513-2529

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