TB 44 Rotary Saw Flashcards
TB 44 Rotary Saw
What are the hazards unique to the rotary saw?
- The blade continues to spin at high RMP’s long after the throttle is released.
- Gyroscopic effect
- Sparks can be thrownup to 15’ from the cutting area.
TB 44 Rotary Saw
What are the different type of blades and uses?
- Wood cutting blade. Used to cut lexan, wood and light metals.
- Masonary cutting blade. Compositiong blade identified with a white or silver stripe.
- Metal cutting blade. Used to cut metals. Can be identified by a green blotter label.
- Diamond blade
TB 44 Rotary Saw
The operator may experience problems if attempting to use the rotary saw for ventilation purposes on steep pitched roofs. This is mainly due to reduced reach and gyroscopic effect
Reference
TB 44 Rotary Saw
During emergency operations, the combination wrench should be carried to facilitate adjustment of the belt or provide blade change.
Reference
TB 44 Rotary Saw
What is the spark plug gap?
.020”
TB 44 Rotary Saw
Carbided tipped wood cutting blade.
If missing tip or a visible radius appears, send the blade to supply and maintenance for replacement.
Reference
TB 44 Rotary Saw
- blades which are worn beyond the guidelines above, may be used for drill purposes.
- abrasive blades (metal and masonary cutting blades) shall not be forwarded for exchange unless the total blade diameter is nine inches or less.
- blades which have been damaged and are no longer safe for use shall be marked with a F-175 tag and the word “unsafe” shall be marked on the blade before forwarding for replacement.
- abrasive blades must be rated for spindle speeds of 5000 rpm or higher.
Reference
TB 44 Rotary Saw
Contamination of composition blade with petroleum products may cause the blade to shatter when used.
Reference
TB 44 Rotary Saw
How many times should you pull the starter rope to clear the cylinder fuel?
4-5 times
