Blade Guides
Whenever changing a blade or adjusting tension and tracking, the upper and lower blade support bearings and guide blocks must be
UPPER GUIDES
Adjustment of the upper guides is a
Support Bearings - The support bearing runs against the back edge of the blade to keep it from being pushed out of position by the advancing workpiece. To adjust the support bearing, loosen the thumbscrews securing the support bearing shaft. Push or pull the shaft so that the upper support bearing is within 1/64" of the back edge of the blade. Retighten the thumbscrews.
| Bearing |
| Thumbscrew |
Support |
|
Bearing |
|
| Guide Bracket |
| Thumbscrew |
Guide Block | Guide |
Thumbscrews | Blocks |
Figure 16. Upper guide adjustments.
Guide Blocks - The guide blocks ensure that the blade is not pushed too far laterally. To adjust the guide blocks, loosen the thumb- screws that secure the guide block shafts. Adjust them evenly so that the front of the blocks are 1/64" behind the gullet line of the blade. Tighten these thumbscrews. Now loosen the guide block thumbscrews. The ideal distance between the blade and each guide block is .004". This measurement is approximately the same as the thickness of a piece of paper or a dollar bill. For a quick gauge, fold a dollar bill in half, slide it over the blade so each half covers each side of the blade. Set the blade guides so each one touches the dollar bill. Be careful not to move the blade in either direction while you are per- forming this adjustment. Tighten the blade guides. The result of this adjustment should leave a .004" distance between the blade and each of the blade guides.
LOWER GUIDES
Adjustments for the lower guides are identical to those for the upper guides, except that the bear- ing and guide block positioning is controlled by setscrews. Use Figure 17 to identify the lower guide assembly components.
Disconnect power to the machine when perform- ing any adjustments or maintenance. Failure to do this may result in seri- ous personal injury.
G4186Z 18" Bandsaw |
