Transcript living with the lab Fabrication of Fishtank Platform ENGR 121 living with the lab DISCLAIMER The content of this presentation is for informational purposes.

living with the lab
Fabrication of Fishtank Platform
ENGR 121
living with the lab
DISCLAIMER
The content of this presentation is for informational purposes only and is intended only for students
attending Louisiana Tech University.
The author of this information does not make any claims as to the validity or accuracy of the information
or methods presented.
The procedures demonstrated here are potentially dangerous and could result in injury or damage.
Louisiana Tech University and the State of Louisiana, their officers, employees, agents or volunteers, are
not liable or responsible for any injuries, illness, damage or losses which may result from your using the
materials or ideas, or from your performing the experiments or procedures depicted in this presentation.
If you do not agree, then do not view this content.
2
living with the lab
Materials
Eight 1.5 in drywall screws to fasten wooden
pieces together
Six ¾ inch, #8 wood screws to attach bracket
Steel corner bracket (McMaster)
(2.5 in sides, 1.5 in width)
3
living with the lab
2 in
Dimensions
6 in
18 in
~1/8 in
0.75 in
3.5 in
4
living with the lab
Safety Rules for Freshman Labs
1.
Do not operate any machine unless you have
•
completed a hold harmless form
•
been trained to operate the machine
•
been authorized to do so by the instructor or lab monitor
2.
When using rotating equipment such as milling machines, drills and lathes,
•
securely tie long hair back to remove the possibility of it falling below your face
•
do not wear loose clothing
•
remove lanyards or jewelry hanging from your neck or wrist
3.
When using power tools like milling machines, drills and lathes,
•
clamp the workpiece in a vise or chuck before drilling or cutting
•
never hold or restrain the workpiece with your hand
•
make sure all safety guards are closed before powering up machine
•
never leave a running tool unattended
4.
When working in the lab,
•
always wear approved eye protection
•
take common sense precautions & avoid “horse play”
•
keep work area clean & organized
•
never use your own power tools
•
only use lab facilities to complete activities required for ENGR 120, 121 and 122
•
report damaged equipment, unsafe activities and accidents to the instructor
Do not begin to fabricate your pump until you have carefully read the
operating and safety instructions above and agree to operate the
equipment in a responsible manner. You must sign the safety contract
before beginning fabrication.
5
living with the lab
Additional Guidelines for Using the Hand Drill
1. Apply pressure in a straight line with the bit. Use enough
pressure to keep the drill bit biting, but do not push hard
enough to stall the motor or deflect the bit.
2. Hold the drill firmly with one hand on the grip and the other
hand on the bottom of the battery pack to control its twisting
action.
3. If the drill stalls, release the trigger immediately and
determine the cause of stalling.
4. Keep the motor running when pulling the bit back out of a
drilled hole to prevent jamming.
5. Be careful not to have hands or other items (such as the
counter top) on the other side of the hole you are drilling.
The drill can “break through” rapidly and other unexpected
things may happen, such as the drill bit breaking, the person
who is drilling may trip, . . .
6
living with the lab
Mark Hole Locations for Top Shelf
Draw center lines to help locate hole positions. Use the speed square and a
ruler to assist with layout
7
living with the lab
Drill Reservoir Drain Holes into Top Shelf
Drill your reservoir drainage holes in the top
shelf (the 6-inch long piece). Use a ½ inch
spade bit
Be sure not to apply too much forwarddrilling force both for safety and to prevent
splintering of the wood as your bit breaks
the back surface
Also, try to keep the bit as perpendicular to
the board as possible
DO NOT DRILL INTO WORKPIECE UNLESS IT IS FIRMLY CLAMPED IN YOUR VISE
8
living with the lab
Mark Pilot Hole Locations on Feet
pilot hole locations
9
living with the lab
Drill Pilot Holes in Feet
Drill holes using the #42 bit (0.0935 in). Pilot holes reduce the chance that the
wood will split when installing the screws, and they make assembly easier
DO NOT DRILL INTO WORKPIECE UNLESS IT IS FIRMLY CLAMPED IN YOUR VISE
10
living with the lab
Countersink Pilot Holes
Countersinking allows the screw head to better seat into the wood, producing a cleaner
job. Countersinking also helps prevent splitting. The N bit works well (N=0.302 in)
countersink receives
tapered part of screw
drill a very shallow hole
using the larger bit
DO NOT DRILL INTO WORKPIECE UNLESS IT IS FIRMLY CLAMPED IN YOUR VISE
11
living with the lab
Attaching the Feet
Attach the feet by installing
screws through the pilot
holes drilled earlier
It is helpful if your partner
holds the wood in place
Use speed square to align foot
with vertical riser before screwing
in 2nd screw
KEEP YOUR FINGERS (AND ANY BODY ELSE’S FINGERS) AWAY FROM THE SCREW.
THE SCREWDRIVER BIT MAY SLIP OFF THE SCREW HEAD AND HIT HURT A FINGER.
12
living with the lab
Attach 2nd Foot to Vertical Riser
Attach 2nd foot with device standing to assure feet are parallel and fishtank doesn’t “rock”
2 ¾ inches
KEEP YOUR FINGERS (AND ANY BODY ELSE’S FINGERS)
AWAY FROM THE SCREW. THE SCREWDRIVER BIT MAY
SLIP OFF THE SCREW HEAD AND HIT HURT A FINGER.
13
living with the lab
Attach Fishtank Shelf
drill pilot holes for screws
use two screws on each side
Orient the shelf to make the feet as parallel as possible; alert your instructor if your
feet are significantly out of line with one another.
14
living with the lab
Attach Shelf for Reservoirs
Use the speed square to get the shelf straight.
use the ¾ inch long, #8 wood screws for the
six holes in the mounting bracket
15
living with the lab
Paint Fishtank (for homework)
PLEASE be careful not to damage your room, the parking lot or any
other property by dripping paint. Have fun . . . and be creative 
16