Benchwork and Layout part 2

Summary

This instructional video script details a step-by-step guide on safely operating a drill press for metalworking. It covers the process of mounting a workpiece, selecting the appropriate center drill, adjusting the drill press RPM, and ensuring safety by removing jewelry and securing hair. The tutorial demonstrates how to change belts for speed control, use cutting fluid, and perform precise drilling and tapping operations. It also includes measuring and setting the correct depth for drilling, using a countersink, and concludes with a reminder to clean up the workspace.

Takeaways

• 🔧 Start by securely mounting the workpiece in a vise to ensure stability during operation.
• ⚙️ Use the correct size center drill bit, which should be smaller than the workpiece's hole size.
• 🔄 Adjust the machine's RPM (rotations per minute) by changing the belts to achieve the desired speed for the task.
• 💡 Safety first: Remove all jewelry and ensure hair and clothing are secured to prevent accidents.
• 📊 Refer to the machine's chart for model-specific RPM adjustments and follow the guidelines for belt changes.
• 🔩 Ensure the machine is powered off and emergency stop button is accessible before making any adjustments.
• 🛠️ When changing belts, loosen the lock on the side and use the lever to move the pulley to the desired position.
• 🔩 After adjusting the belts, secure the set screw on the opposite side to lock the pulley in place.
• 💧 Use a minimal amount of cutting fluid ('cat magic') for lubrication while drilling, not for cooling.
• 📌 Center drill and then use a 5/16 drill bit followed by a 3/8 reamer for the initial hole preparation.
• 🔩 For tapping, start the tap by hand to create a few threads before using a tap wrench for the rest of the process.

Q & A

What is the first step in the process described in the script?

The first step is to mount the workpiece in the vise device, ensuring it is centered and secure.

Why is it important to choose the right size of center punch for the workpiece?

It is important to choose a center punch that is most appropriate for the workpiece size to avoid damaging it. A punch that is too large could be detrimental to the workpiece.

How does one change the RPM of the machine described in the script?

To change the RPM, one must adjust the belts by moving the pulleys, as described in the script. This involves loosening the lock, moving the pulley to the desired position, and then tightening the set screw.

What safety precautions are mentioned in the script before starting work?

The script advises removing all jewelry, ensuring hair is tied back, and taking off watches and rings to prevent them from getting caught in the machine.

What is the maximum RPM that the SP 32 model can achieve according to the script?

The SP 32 model can achieve a maximum RPM of 290.

Why is it necessary to ensure the machine is off before changing the belts?

Ensuring the machine is off before changing the belts is a safety measure to prevent accidents and ensure the accuracy of the belt adjustment.

What is the purpose of using 'cat magic' in the drilling process?

Cat magic is used as a lubricant during drilling to reduce friction and prevent the drill from overheating, but only a few drops are needed.

How does the script suggest checking the depth of the drill for a specific task?

The script suggests using a scale to measure the depth of the drill against the required dimension, such as 7/16 inches.

What is the purpose of peck drilling as mentioned in the script?

Peck drilling is a method where the drill is repeatedly withdrawn and reinserted to clear away swarf and prevent the drill from overheating.

How does the script describe the process of starting a tap in a hole?

The script describes starting a tap by initially threading it into the hole by hand until it is tight, then using a tap wrench to ensure it doesn't move while the machine is running.

What is the final step mentioned in the script after completing the drilling and tapping process?

The final step is to clean up the work area, remove the workpiece, and prepare for the next task, which involves moving to the workbench.

Outlines

00:00

🛠️ Setting Up the Vise and Adjusting RPM

The video begins with instructions on mounting a workpiece in a vise, ensuring it is centered and secure. The presenter emphasizes the importance of safety, advising viewers to remove any jewelry or loose clothing that could get caught in the machinery. They then demonstrate how to change the belts to adjust the RPM of a drill press, explaining that different models have different maximum RPM capabilities. The presenter shows how to move the pulley to achieve the desired speed, ensuring all power is off and the emergency stop button is accessible. They also explain the process of tightening the belt and securing the pulley in place.

05:01

🔩 Drilling and Reaming the First Hole

The presenter proceeds to demonstrate the process of drilling a hole using a center drill. They explain the importance of selecting the correct size of the center drill and ensuring the drill press is running at the appropriate speed. The video shows how to hold the workpiece in place while drilling, and the use of a lubricant to facilitate the drilling process. The presenter also demonstrates how to adjust the drill press to accommodate different drill sizes and how to use a reamer to smooth out the hole after drilling. They emphasize the importance of using the correct amount of lubricant and not to flood the drill with it.

10:02

🔩 Tapping and Countersinking the Holes

In this section, the presenter moves on to tapping and countersinking operations. They discuss the importance of using the correct size of tap and countersink bit, and how to set the drill press to the proper depth for drilling. The video demonstrates how to start the tap by hand and then use the drill press to complete the threading process. The presenter also shows how to use a depth stop to ensure the drill does not go through the workpiece, and how to countersink the hole to the correct angle using a countersink bit. They emphasize the importance of checking the measurements and making adjustments as necessary.

15:04

🔩 Completing the Drilling and Tapping Process

The final part of the video script involves drilling a hole to a specific depth and preparing it for a countersink. The presenter demonstrates how to set the drill press to the correct depth using a depth stop, ensuring that the hole is drilled to the required depth without going through the workpiece. They also show how to use a countersink bit to prepare the hole for a screw head. The video concludes with the presenter cleaning up the work area and moving on to the next stage of the project, which involves working at a table saw.

Keywords

💡Workpiece

A 'workpiece' refers to the material that is being worked on or machined. In the video, the instructor is preparing a metal workpiece for drilling, highlighting the importance of securing it properly in a vise before beginning any machining operations.

💡Vise

A 'vise' is a mechanical apparatus used to secure an object to allow work to be performed on it, such as drilling or sawing. In the video, the workpiece is mounted into the vise to keep it stable while precise drilling and other machining tasks are carried out.

💡Center Drill

A 'center drill' is a tool used to create a small pilot hole at the center of the workpiece, which guides the subsequent drilling process. The video explains how to select the appropriate size of the center drill to ensure that the main drill can follow the pilot hole accurately.

💡RPM (Revolutions Per Minute)

RPM stands for 'Revolutions Per Minute,' indicating the rotational speed of the drill bit or machine spindle. The video demonstrates how to adjust the belts on the machine to change its RPM, which affects the speed at which the drill bit rotates and the efficiency of drilling into the workpiece.

💡Pulley

A 'pulley' is a wheel mechanism that helps transfer force in machines. In the video, the instructor adjusts the position of pulleys to change the drill's RPM. The correct setting of the pulleys ensures that the machine operates at the optimal speed for the task at hand.

💡Tap

A 'tap' is a tool used to cut internal threads in a hole, allowing a bolt or screw to be inserted. In the video, after drilling holes in the workpiece, the instructor prepares to use a tap to create threaded holes that will accommodate specific screws or bolts for assembly.

💡Reamer

A 'reamer' is a tool used to widen and smooth out an existing hole to achieve a precise diameter. The video shows the instructor using a 3/8 reamer to refine the holes drilled into the workpiece, ensuring a clean finish and accurate sizing.

💡Countersink

A 'countersink' is a conical hole cut into a material, allowing the head of a screw or bolt to sit flush with or below the surface. The video demonstrates how to create a countersink in the workpiece to accommodate specific fasteners, ensuring a smooth and professional finish.

💡Peck Drilling

'Peck drilling' is a technique where the drill bit is repeatedly withdrawn slightly during drilling to clear debris and prevent overheating. In the video, the instructor uses this method to ensure a clean, precise hole while preventing the drill from binding or overheating during deeper drilling operations.

💡Lubricant

Lubricants, like 'tap magic,' are used to reduce friction between the drill bit and the workpiece, ensuring smoother cuts and prolonging tool life. The video emphasizes that only a small amount of lubricant is needed during drilling, illustrating how too much can be counterproductive.

Highlights

Mounting the workpiece in a vise for precision alignment.

Selecting the appropriate size of center drill for the workpiece.

Changing the belts to adjust the RPM of the machine.

Safety precautions including removing jewelry and ensuring hair and clothing are secure.

Using a chart to determine the correct RPM settings for the machine.

Adjusting the machine to its fastest level for drilling.

Properly securing the workpiece with a center drill.

Drilling the first hole with a 1/4 inch drill bit.

Using a 3/8 inch reamer to smooth the drilled hole.

Applying a few drops of cutting fluid for lubrication.

Adjusting the vise to accommodate the drill bit and reamer.

Peck drilling technique to clear the drill bit of swarf.

Tapping the hole with an 8-32 tap after drilling.

Countersinking the hole to the specified depth using a countersink bit.

Measuring and adjusting the depth of the tap to ensure correct thread depth.

Starting the tap by hand to establish the first few threads.

Drilling and tapping a second hole for a #3-28 screw.

Setting the drill press to the correct depth for a 7/8 inch deep hole.

Using a 90-degree countersink for the final hole preparation.

Completing the drilling and tapping process and cleaning up the workspace.

Transcripts

the first thing we're going to do is

we're going to mount the workpiece in

the vise device control precise as home

sports

parallels in there and we're gonna

Center grow so sooner girls come in

several sizes you wanna find one that's

the most appropriate you definitely

don't want to have one that is or larger

then in your start drill so I'm using a

number for the center girl they have

numbers arranged from multiple zero to

six getting small to larger this is

smaller than the larger and to change

the RPM of this one you have to change

the bells and this right now is running

at its lowest speed and that's not

something I need so I'm going to go over

the decide here and show you how to

change the belts so that you can change

the RPM

now one of the things you want to make

sure you do before you work on anything

is you want to move all of your jewelry

you can't have any Nexus dangling make

sure your hair is tight back if you got

watches take them off and if you're

wearing rings definitely take them off

because you don't want anything to get

caught in the machine while it's running

because it could injure you severely now

in this chart

it has different model numbers SP 32 is

what this one is SP 32 says that it can

go you can adjust your belts to 270 rpm

up to 200 mm 290 re and doing the math

[Applause]

depending speed we're going to be a lot

faster than the fastest this can go so

we're going to go ahead and set it at

the fastest level to do that you want to

make sure all of your powers off you can

even hit the emergency power button if

you wanted to not to move these you've

got a little lock here on this side and

also on the opposite side so just reach

around loosen that and then you can use

this lever to move this pulley forward

go ahead and it's easiest to work be

really careful you don't get your

fingers caught underneath there go ahead

take this one completely off because

what this chart is saying is I need to

set it ahead pull each 3m pulley for

pulley three is down here on the bottom

and pulley four at the top

so what I'm going to do is moving from

the larger to the smaller first give it

a little shove and spin and that will

drop into that groove and move this one

so now that is on pulley three I'm gonna

put this one back on for spin and then

shove this arm back maintain pressure

you want to tighten this one reach over

to the other side tighten that set screw

and now when you turn this on and may

always make sure this is closed when you

turn that on

it's running the fastest Arpita

when you stop it to stir it to stop

position wait for it stop don't reach up

here you'll get in a hurry reach over

grab it because it could still injure

you to grab hold so

go ahead and center drill in there with

the key

I've seen people insist that you have to

move all three you don't that system

hold still they believe tight is tight

now I've got a little bolt Tina bull so

what I'm going to do is bring this down

and disposition this letting that center

drill fit in that center punch hole now

turn the spindle on

[Music]

and I'm going to hold this down

[Music]

[Music]

[Music]

and what I wasn't showing you before

because we're so close is when I was

drilling I'm moving into position and

then tighten this down just finger tight

that's enough to keep it from popping up

and I'll see using my hand to hold it

so for these first holes I'm gonna drill

it with a 2564 drill and then rainbow

with a 3/8 reamer you want usable tap

magic now one thing I see is people use

way too much in this just a couple of

drops enough to dissolute rotate the

drill you're not cooling it with it

you're just lubricating and you'll

notice I can't get my drill in here

because I don't have it so back that out

just a little bit further so you can see

what I'm doing there is a couple of

blocks on this backside loosen those and

then there's a crank you can lower this

down get our drill in there vice well

double check make sure we got enough

room for our reamer you still don't

let's lower that down a little bit more

now we can get our reamer in there

let's go ahead girl back in tighten that

up could you drop some cat magic out

there and we'll go ahead and drill this

hole

I usually just come in the night start

with and I can tighten this up

[Music]

[Applause]

[Music]

[Music]

you notice all that only put this a

little bit of cat magic on

[Applause]

[Music]

Peck drilling let's get all the way

through back out shut that down

[Music]

Reimer and there we go

[Music]

the whole and I just focused a little

bit by this knob up here

like

at manager there

[Applause]

through one smooth movement

back out that hole is green

[Music]

so put some rain we're back in its case

that way it stays good sharp put these

away now we're moving on to the second

drill which we're going to drill through

the five sixteenths and then ultimately

we're going to tap with eight three

eight sixteen so here's the five

sixteenths girl it's always good to

double check to make sure it's got an

engraved inside five sixteenths and this

also is through-hole so we'll find that

position

[Applause]

[Music]

so the next thing we're going to do is

we're going to at least start the tap

we're going to you know the print calls

out a counter set on this whole and what

it's saying is a 8.43 diameter and

counter sink

0.43 is about 7/16 and as it seems is

four through seven so I'm going to take

my scale and set it to 16 and I'll

measure that so we'll turn this on but

I'm going to go ahead and turn it down

so wait

[Music]

make sure there

you read

[Music]

so we are only at 5/16 right now we're

barely at 3/8

[Music]

okay about another 1670 inch to come out

[Music]

there

[Music]

and

[Applause]

Oh

I am right at 7/16 there so I'm going to

stop that senator girl how to send our

hunter sink out and

but the tap it and I'm not going to do

all the tapping here I'm just gonna get

started so I've got the tap in there

pretty tight I'm not going to turn it on

I'm going to put my check key in this

way tighten down this nut so it doesn't

move and now I can run my tap through

there you see this key I will get a

couple of terms so that when we come

over to the workbench to actually tap it

will do the tap in my hand

we've got something to start so started

that I've got a couple of threads and

that's enough so then we get over on the

table we'll make sure that our tap

starts straight

and that's just a little trick and we'll

do the same thing with this next one the

next hole we're going to drill a tap for

a quarter twenty eight

and that uses

and you do that

you're going to do the math for yourself

so until the check drill charts at the

number three drill that I'm going to put

there but it doesn't go all the way

through you've got a specific depth that

it calls out I'm going to drill this

hole hole about 7/8 deep so what we'll

do is we'll bring this down until the

drill touches on a flat part the head

now this and that

come down attention and we'll move up

yes there's marks on here

so

we move it to the seven eight mark

we can tighten it up then what'll happen

is we move this out of the way so we can

see all of it just this see see him

doing so now when I move this down it

will stop when it gets to zero your stop

ascent it will not drink through the

drum you know little further limited

here in the front see that it stops the

poor drilling all the way through so

what we'll do is move this back into

position over that Center drilled hole

[Applause]

you know this you can't adjust power

adjustment here

[Music]

it should normally run at about 6:00

[Music]

[Applause]

zero it has cut always true so

our seven eight

they drill out

[Music]

and it's asking for

a 280,000 countersink which unless

you're on there 280 is about nine thirty

seconds so I'll switch over to the 30

seconds side

we're about there anyway from the sand

room which isn't a countersink but this

point

war

so we're gonna do the exact same thing

with this as you did the other one and

what this does is ensures loosen is now

so that this will ensure that

your threats are square in your block

like I said the other one I was going to

go 3 4 threads

[Music]

and now we are done on the drill press

take this out take a part out and the

last thing we wanted to horses we'll

clean this off sweep up our mess and

move over to the table

you