Delta 28-280 instruction manual Adjusting Upper Blade Guides and Blade Support Bearing

ADJUSTING UPPER BLADE GUIDES AND BLADE SUPPORT BEARING

The upper blade guides and blade support bearings are ad- justed only after the blade is tensioned and tracking properly. To adjust proceed as follows:

1.The upper blade guides (A) Fig. 23, are held in place by means of the set screws (B). Loosen the set screws (B) to move the guides (A) as close as possible to the side of the blade, being careful not to pinch the blade. Then tighten the screws (B).

2.The guides (A) Fig. 23, should then be adjusted so that the front edge of the guides are just behind the “gullets” of the saw teeth. The complete guide block bracket can be moved in or out by loosening thumb screw (C) and turning knurled knob (D) Fig. 23. When guides (A) are set properly, tighten thumb screw (C).

3.The upper blade support bearing (E) Fig. 23, prevents the blade from being pushed too far to the back which could damage the set in the saw teeth. The support bearing (E) should be set 1/64 behind the blade by loosening thumb screw (F) and turning knurled knob (G) to move the support bearing (E) in or out.

4.The blade support bearing (E) should also be adjusted so the back edge of the blade overlaps the outside diameter of the ball bearing by about 1/16 . The bearing (E) is set on an eccentric and to change position remove screw (H) and bear- ing (E) Fig. 23. Loosen thumb screw (F), back out screw (G) and re-position shaft that bearing (E) is attached to.

ADJUSTING LOWER BLADE GUIDES AND BLADE SUPPORT BEARING

The lower blade guides and blade support bearing should be adjusted at the same time as the upper guides and bearing as follows:

1.Loosen the two screws (A) Fig. 24, and move the guides (B) as close as possible to the side of the blade, being careful not to pinch the blade. Then tighten screws (A).

2.The front edge of the guide blocks (B) should be adjusted so they are just behind the “gullets” of the saw teeth by turn- ing the knurled knob (C) Fig. 24.

3.The lower blade support bearing (D) Fig. 24, should be adjusted so it is about 1/64 behind the back of the blade by turning the knurled knob (E).

Fig. 23

Fig. 24

10