Power tools Flashcards
Circular saws
trennschleifers
Stihl TS-360
- 3.68 cuin 2 stroke motor2. 50:1 fuel ratioa. One gallon + 2.5oz of oil = 51.2/1 ratiob. Good enough3. Fuel capacity 1.2 pts (19oz)4. Max RPM 5000 (blade speed)5. Cutting depth 3.9in (with new blade)6. Weighs 22.9lbs without blade7. V-belt tension = 3/16-3/8in
Stihl TS-400
- Replacing the 3602. 12 or 14in blade3. 3.9 cuin 2 stroke motor4. 50:1 fuel ratioa. One gallon + 2.5oz of oil = 51.2/1 ratiob. Good enough5. Fuel capacity 1.39 pts (22.2oz)6. Max RPM 5350 (blade speed)7. Cutting depth 4.9in (with new 14in blade)8. Weighs 22.9lbs without blade9. V-belt tension = 3/16-3/8in
Stihl TS-460
- Replacing the 3602. 12 or 14in blade 3. 4.42 cuin 2 stroke motor4. 50:1 fuel ratioa. One gallon + 2.5oz of oil = 51.2/1 ratiob. Good enough5. Fuel capacity 2.1 pts (33.4oz)6. Max RPM 5350 (blade speed)7. Cutting depth 4.9in (with new 14in blade)8. Wieghs 23.5lbs without blade9. Automatic belt tensioning
Stihl TS-420
- Replacing the 3602. 12 or 14in blade3. 4.07 cuin 2 stroke motor4. 50:1 fuel ratioa. One gallon + 2.5oz of oil = 51.2/1 ratiob. Good enough5. Fuel capacity 0.71 L (24oz)6. Max RPM 5350 (blade speed)7. Cutting depth 4.9in (with new 14in blade)8. Weighs 22.3lbs without blade9. Automatic belt tensioning
Chainsaws
motosäges
Stihl 29
- 3.3 cuin 2 stroke engine2. 50/1 fuel ratio3. 1.2pts (19.2oz) fuel capacity4. Weighs 13lbs without bar or chain5. 20in bar, 72 links, 36 carbide tipped teeth, single rake chain6. Replace when 1/3rd of teeth are missing, i.e. 12
Stihl MS 310
- Replaces 292. 3.6 cuin 2 stroke engine3. 50/1 fuel ratio4. 1.2pt (19.2oz) fuel capacity5. Weighs 13lbs without bar or chain6. 20in bar, 72 links, 36 carbide tipped teeth, single rake chain7. Replace when 1/3rd of teeth are missing, i.e. 12
Stihl MS 460
- 4.67 cuin 2 stroke engine2. 50/1 fuel ratio3. 1.69pt (27.1oz) fuel capacity4. Weighs 15.4lbs without bar or chain5. 20in bar, 72 links, 36 carbide tipped teeth, single rake chain6. Replace when 1/3rd of teeth are missing, i.e. 12
Stihl MS 660
- 5.6 cuin 2 stroke engine2. 50/1 fuel ratio3. 1.74pt (27.8oz) fuel capacity4. Weighs 16.5lbs without bar or chain5. 36in bar, 96 links, 48 carbide tipped teeth, single rake chain6. Replace when 1/3rd of teeth are missing, i.e. 167. Found on Ladder 1
Good! I finally know all the saws.
There may be other saws in service. Know your truck above all!!!
What is the goal of using the power tools?
To become safe and proficient in the power tools that TFD routinely uses.
Four stroke engines
i. Can be unleaded or diesel
ii. Takes four strokes to complete each cycle
iii. Primarily used on generators and gas powered fans
What are the four strokes?
Intake stroke
1. Piston moves down to draw in fuel air mixture from intake valve
Compression
1. Piston moves up as valves shut, compressing the fuel air mixture
2. At the apex, the spark plug fires
Power stroke
1. Explosion forces piston down generating power
Exhaust
1. Exhaust valve opens as piston rises, forcing out exhaust
Two stroke engines
i. Requires gasoline mixed with oil as it lacks an oil pan
ii. Takes two strokes to complete each cycle
iii. Found on circular saws and chain saws
iv. Combines strokes into intake/exhaust & compression and intake/exhaust & power
What are the two strokes?
v. Upstroke
1. Air/fuel compressed generating heat, at the apex, the spark plug fires
vi. Down stroke
1. Whenever the piston moves down, waste gases are pushed out and the resulting vacuum sucks in new fuel air mixture
Our responsibility with regards to power saws
Our responsibility: Be able to identify the refueling, starting, operating, and safety procedures for the cabin and rotary saws utilized by TFD and know in detail the specifications for saws that are in the equipment cache of the PSA
Uses for power saws
i. Ventilation
ii. Forcible Entry
iii. Extrication
iv. Building collapse
Locations of powersaws
i. Ladder trucks
1. With the wind and downhill, they make maybe 4mpg of diesel
ii. Ladder tenders
iii. Heavy Rescue 04 @ Grant and I10
iv. Engines
Blades for circular saws
Rescue
Steel Carbide tipped
Composite blade
Blade safety
No sideload!
No stop blade rotation by sticking into something!
No cut above shoulder height!
No trim nails with saws!
Rescue blade stats
a. Can cut concrete, brick, masonry block, wood, steel, iron, glass, plastic, wood
b. Steel core with industrial grade diamonds vacuum-brazed to the edge
c. Max operating speed = 5400rpm
d. Weighs 6lbs
e. Water cooleable
f. Primary blade on all engines, ladders and LTs.
Rescue blade useage
g. Spin in direction of arrow, keeping RPMs high so it doesn’t bog down the cut, and keeping the blade straight to prevent side-loading
h. When cutting soft materials, the blade may glaze up. If that happens, cut briefly into something hard (concrete, brick, asphalt, etc) to deglaze them
i. For hurricane or safety glass, use high RPM for fastest cut
Steel carbide tipped blade stats
a. Used for cutting wood and non-ferrous metals
b. Tips can break off
c. Replace when 1/3rd tips are missing
d. Run at full throttle prior to contacting surface
Composite Blade stats
a. Fiberglass and epoxy impregnated with abrasive material
b. Used for cutting steel, concrete and masonry
c. 12in diameter blades when new, replace when 8in diameter
d. Must read label correctly to ID blade type
e. 3.9in cutting depth with a new blade
Composite Blade useage
f. Should be turning at idle when contacting work surface
g. Blotters should be used to avoid vibrations from saw to blade
h. Keep away from petroleum if possible as this damages the blade
Blade changing
- Engine off
- Proper tools for saw
- ID the saw and blade in need of work
- Engage spindle locks and lock it
- Remove bolt, thrust washer, and blade
- Replace blade, reinstall washer correctly and tighten
- Check blade
Starting circular
- Switch to ‘on’
- Pull out choke button to close choke
- Lock trigger hatch
- Left hand on handle bar, right foot on rear handle
- Clear front and behind
- Grab cord, ensuring that starter pawls are engaged
- Quick short pulls to burp it
- Disengage trigger latch and open choke
- Avoid flooding engine
- To turn off, switch to off, and make sure you control blade until it has fully stopped.
How chainsaws work
- Chainsaws have a centrifugal clutch that operates the rotation of the chain. When the saw is at idle, a spring keeps the clutch shoe from rotating the sprocket drum.
- As the crankshaft turns faster and faster, the clutch shoe overcomes the spring by centrifugal force, grabbing the sprocket drum and rotating the chain.
Chainsaw can cut through…..
- wood sheeting, asphalt shingles and sheets, fiberboard and foam board under layment, thin nonferrous metals.
- Will not cut masonry tiles, concrete, heavy metal sheeting, metal bars/pipes/supports, rock or clay roofing materials
Operating a saw
- Clear area of bystanders and start saw
- Brace feet wide apart on parallel line to cut
- Bring up to full throttle
- Cut at a 45 degree angle
- Keep roller tip through material
- Cut along desired line, maintaining depth and angle
- Beware that kickback might happen when the tip makes contact with materials being cut!
Safety for using saws (loooooooots of stats)
i. Wear PPE
ii. Keep both hands on the saw
iii. Be safe while fueling
iv. Watch out for sparking
v. Examine cutting wheel/teeth before each use
vi. Never operate without guard in place
vii. Never cut above shoulder height
viii. Never side load
ix. Operate outdoors or wear SCBA
x. Handle abrasive wheels carefully
xi. Make sure the blade is rated to that RPM
xii. Make sure blade/chain has stopped spinning when finished
xiii. Cuts should be made at full throttle unless using a composite blade
xiv. Do not carry circular saw with engine running
xv. Beware of kickback
xvi. Positon your body out of the path of the saw blade
xvii. Check blade/chain tension
Generators fuel types
a. Portable are four cylinder gas powered engines
b. Rig mounted are diesel
Homelite 2500
Five HP Briggs and Stratton engine
2300 watts
120 volts
19.2 amps
Honda Multiquip
i. 4HP Honda engine
ii. 2300 watt capacity
iii. 120 volts
iv. 19.2 amps
Generators are used for…..
i. Smoke ejectors
ii. Lights –halogen
iii. Water vacuums
Generator equipment
i. Electric cord reels (50 ft.)
ii. Junction boxes
iii. Pigtails 18’-24’, household adaptors, 3 prong 1/4th turn twist locks (adaptors)
iv. Lights, smoke ejectors, water vacuums, etc.
1. Lights range from 300, 500, 750 or 1000 watt
Watts and amps stats
i. If it has watt rating on it, use that. Plug in the higher demand item first, and then subtract to see the available watts.
ii. If amp, use formula to figure out available slots
1. Amp = generator output in watts/120 volts
iii. Never start under load
Starting generators
i. Check fuel and oil
ii. Open fuel petcock
iii. Turn on engine
iv. Close choke when cold starting
v. Engage starter pawls and pull
vi. Once it burps or tries to start, open choke
vii. Do not use in occupancies due to exhaust
Fans
a. Located on all engines, Ladders, and LTs
b. Used to reduce heat and smoke in a structure
c. Pull, push, pressurize, and venture air
d. Ventilate confined spaces or disperse vapors
Electric Smoke ejectors
i. 750-1000 watts
ii. 16in blade will move 5200 cuft/min
iii. 20in blade will move 9500 cuft/min
iv. Advantages – lighters, no emmissions, simple to operate, will work in oxygen deficient environement
v. Found on ladders/LT might need generator
Description plate on top of fan says “P 164 SE”
- Portable
- 16in blade length
- 4 blades
- Square
- Explosion proof
Gas powered smoke ejectors
i. Four stroke gas powered Honda engine
ii. 4-5.5 HP
iii. Unleaded gas
iv. 2-7 blades (laminated hardrock maple or metal)
v. Rated at 10,000-20,000 CFM
vi. Fan speed adjustable with throttle
vii. Should not be used inside structure
viii. If needed, use exhaust extender for outside structure.
