TB 44 Rotary Saw Flashcards
TB 44 Rotary Saw
The following safety equipment should be used at all times:
- Gloves
- Goggles
- Helmet
If an electrical hazard is suspected or exists, gauntlet gloves shall be used.
A safety member shall be utilized in all cases.
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TB 44 Rotary Saw
Hot sparks can be thrown up to ___ feet from the cutting area.
15
TB 44 Rotary Saw
Masonry Cutting Blade - identified with a ___ or ___ stripe.
Blade life can be extended by applying water on the work surface as this cools the blade and reduces dust in the atmosphere.
white or silver
TB 44 Rotary Saw
The Wood Cutting Blade - A tempered metal blade, carbide tipped, used for cutting composition roofing material, wood, and lexan. Use on light sheet metals such as door cladding or aluminum sheet with care.
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TB 44 Rotary Saw
There are two (2) types of composition blades; the masonry cutting blade and the metal cutting blade. Grit and resinoid epoxy agents are specially formulated to cut specific materials. Abrasive blades are fiber reinforced for added strength and longer wear.
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TB 44 Rotary Saw
Diamond Blade - An expensive, fast cutting blade with a blend of hardened, synthetic diamond material fastened to the outer edge. Arrows are located near the hub indicating
direction of blade rotation. This blade can cut masonry, reinforced concrete, and mixed materials.
Avoid cutting metal as this will reduce blade life.
This blade shall be reserved for emergency operations ONLY. A Diamond Blade is assigned to each
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TB 44 Rotary Saw
Daily Checks
- Check fuel for level.
- Check the blade for sharpness and proper mounting.
- Check the blade guard for damage.
- Check the belt for tension.
- Make a visual check of the saw for loose nuts and bolts.
- Check the controls for proper starting position. Check the carrying strap and hooks for condition.
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TB 44 Rotary Saw
Weekly Checks
- Start the saw and operate until warm.
- Run up rpm to verify that the blade runs true and smooth without wobble or vibration.
- Listen for abnormal sounds.
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TB 44 Rotary Saw
Monthly Checks
- Maintain a clearance of ____” at the spark plug gap on the Homelite and ___” on the Partner. Clean plug as necessary or replace.
- Remove the cutting blade and check the bearings on the arbor. The arbor should rotate freely, without roughness. If roughness is felt, the saw should be sent to the Division of Supply and Maintenance for repair.
- Inspect the engine case for cracks or leaks.
- Inspect the fuel assembly for leaks, crack or soft fuel lines DO NOT operate saw if there is a fuel leak.
- Before replacing blade, check the condition of the blotters. Abrasive blades with damaged blotters should not be used. Replacement blotters can be obtained through Supply and Maintenance.
- Check the belt for condition and tension. If the belt is worn or frayed, replace.
- If a tank of fuel has not been used in the previous 30 days, drain fuel and refill with fresh 50:1 mix.
.025 - Homelite
.020 - Partner
TB 44 Rotary Saw After use
Refuel Examine blade clean blade guard clean engine, no water check all bolts and wires check air filter , no compressed air or solvents
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TB 44 Rotary Saw
Blades shall be measured and meet the following requirements for emergency use.
Minimum 12” for Partner 14” Saw Minimum 10” for Homelite 12” Saw
9” minimum
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TB 44 Rotary Saw
Flooded cylinder (use procedures below):
a. Place on/off switch in “off” position.
b. Turn saw on its side (exhaust side down).
c. Push in choke (“off” position).
d. Pull starter rope, 4-5 times, to clear cylinder of fuel.
e. Place switch in “on” position and use normal starting procedures.
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Two hazards unique to the rotary saw make it an extremely dangerous tool.
First, the blade continues to spin at high rpms long after the throttle is released
The second hazard is the gyroscopic effect caused by the spinning blade.
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TB 44 Rotary Saw
Metal Cutting Blade - A composition blade used to cut metals that may be encountered during rescue or forcible entry situations.
This blade can be identified by a ____ blotter label.
green
TB 44 Rotary Saw
In warm weather, the engine should fire after ___ to ___ pulls.
one to five
TB 44 Rotary Saw
If a carbide tipped wood cutting blade was used, check for tip damage and sharpness. If a missing tip or a visible radius appears, send the blade to Supply and Maintenance for replacement.
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TB 44 Rotary Saw
CAUTION
When replacing a shattered blade, examine the blade guard for damage. A damaged blade guard must be replaced to protect the operator.
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TB 44 Rotary Saw
Store blades in a safe dry location to protect them from damage and possible contact with petroleum products. If one of the composition blades becomes contaminated with a petroleum product, it should be sent to Supply and Maintenance for replacement.
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TB 44 Rotary Saw
To prevent the blade from binding during cutting operations, use the following procedures:
- Adjust blade guard to control cutting depth.
- Enter all cuts at full rpm.
- While cutting vertical surfaces, make certain blade is kept at right angle to surface.
- Always cut in straight line (do not twist saw to, either side).
- Release throttle and immediately remove blade from cutting surface if binding occurs to avoid belt damage.
