TB-44: Rotary Saw Flashcards
The LAFD carries 4 types of 14” rotary saw blades
Abrasive, Combi, Diamond, Carbide
Blades shall be a minimum of _____ to remain in front line service
12”
Blades smaller than _____ may be used for training purposes.
12”
Blades below _____ shall be sent into the shops for replacement.
9”
Abrasive blades shall be removed from service if there are signs of __________ which could render the blade unsafe
petroleum product contamination or cracks
The Combi-blade is a…..
diamond blade
Combi-blades can be used to cut on…..
bare metal, concrete, reinforced concrete, masonry or Robertson Decking.
All Combi-blades are …..
bi-directional.
The Combi-blade is not designed to cut soft metals such as…
brass or aluminum, however it can cut thin, soft metal found on train siding, aircraft siding, metal clad doors, or aluminum gates
(Combi & Diamond blades) Any glazing or buildup of material on the diamond segment can be cleaned by…
cutting into a soft material such as brick, cinder block or asphalt.
The Combi-blade had a continuous cutting depth of
4 3/4”
Combi-blades & Diamond Blades shall be forwarded to Supply and Maintenance for replacement when:
● Any one segment is fractured, broken or missing.
● Bald spots along any of the segments occur.
● Matrix bond is equal to the thickness of the blade body; a step or lip no longer exists.
A Diamond blade is
oncrete diamond blades are designed as a directional cutting rotation. An arrow maybe stamped or printed on the blade indicating the proper rotation
Concrete diamond blades are designed to cut
concrete and metal encased in concrete. Do not attempt to cut bare metal with this blade.
CARBIDE TIP BLADE
used for cutting composition roofing material, wood, and Lexan. Use on light sheet metals such as door cladding or aluminum sheet
At a minimum, the following safety equipment should be used while operating the saw:
- Gloves
- Eye Protection
- Helmet
- Brush jacket/Turn out coat
Flooding can occur when the starter cord is continually pulled with the saw…..
remaining in the choked position after the saw pops or attempts to start.
With the blade centered it reduces blade bind and provides better balance of the saw during operations such as vertical ventilation on a roof or cutting concrete.
Inboard Position
The Rotary saw uses a 50:1 two-stroke fuel mixture.
Start by filling the container with half the amount of gasoline to be used. Then add the entire amount of two-stroke oil.
Current LAFD policy is to replace fuel in small engines every 30 days with fresh fuel. Also, a fuel stabilizer such as…..
Sta-bil® or Seafoam®
he cutting blade continues to rotate up to ______ after the engine has stopped
1 minute
The electrode (spark plug) gap is ____
.020” (0.5 mm)
Sparks can be thrown up to….
30 feet
