Keith, Set-up time takes a long time, but is fully needed. Even us hobby guys spend hours aligning parts up. The actual machining takes minutes. Your a “Real” Machinist. Oh yea, if we fixed up all the little things in our shops, we would be stuck for a whole month. I loathe fiberglass! See ya in Fla. love the kids singing the Pledge.
Fascinating! My Dad and Grandfather were both Tool & Die Journeymen. I knew they were very skilled craftsmen but I have gained a new perspective on how gifted they were when, in retirement, I am attempting to develop some basic machinist skills simply as a hobby so I may honor and appreciate just what a formable skill a machinist possesses. I am awed and humbled by the craftsmen and their knowledge and skill I see on RUclips. Their precision work is a joy to behold. 🖕🙏🏼🇺🇸🖖
Awesome video. It is new years eave and I would rather watch you pass on what you have learned instead of doing all the new years stuff! Thank you so much and may God bless you and your work.
Keith I’m an armature machinist, so my comment is from that perspective, your content is varied and fantastic, I was so impressed with you innate professionalism, the discipline you maintain with removing the chuck key from the chuck when you’re not opening or closing, eg whilst adjusting for the 6 inch chuck was amazing, it’s so deeply ingrained. You did not leave the chuck key once when it shouldn’t have been in, very instructive, thank you.
Keith, I swear to god, you have forgotten more about this stuff than most people could learn in a lifetime. I'm just a fan, hope you appreciate how much that means as a testament to your true expertise. Thank you for stickin with it during the crap you had to deal with over the last few months.
When I read the title I thought :"THIS I gotta see"! Thinking Glass tubes, instead of 'glass tubes. ;) Also I reuse zip ties all the time. Just tickle the "ratchet pawl" part with my tiny pocketknife ...
Complications aplenty for marine shafting machining setup and you're being such a jolly fellow just after the holidays. What a great way to wake up. Thanks Keith!
Keith, Just want to share that you are a true inspiration to current and future machinists out there. The amount of knowledge and foresight you share with the world is truly amazing.
you can buy velcro material from a sewing/fabric store as well as at Home Depot too ( used to wrap electric cords or any use you need )... for the same use.... re-useable straps or tie wraps...yep...
That part is exactly why I have my VM tables in perfect alignment with my lathe bedways.. It's those extra long parts that most shops walk away from, that I love to tangle with. I watch your channel quite a bit since you are Old School, Highly skilled. Our shops could be twins. Excellent work Keith!!
I have found that the drywall dust bags they sell for shop vacs do a good job of collecting fiberglass dust. Plus they save the very expensive heapa filter.
Hi Keith not and easy job turning fibre glass tube at that distance between chuck and steady deflection and out of round makes the job difficult. Late 70's I turned a number of large fibre glass coated rollers for paper pulping plant.. yeah glass fibres are a pain . Good to see you back.
I learn so much watching your videoes.. all the small tips, like your tube holding. As always your the best youtube educational entertainment. Hope you will have a great new year! Best from Denmark.
Love your vids you got me into metal again just got a 14-40 doall lathe:) you inspire and teach me you are an artist. thank you so much!! Alaska its not ez to find good tooling:(
i would have thought there was lots of tooling in alaska...industrial sized way too big for normal use stuff lol. and it wouldnt be the north if there wasnt a way to work around it or to jerry rig it or to just make it work lol
I had never seen glass tubes machined before. You make it look deceivingly easy. How many pieces of tube did you destroy before you got it down to a process that worked. As always, you teach me something new with every video. I'm like you, I don't want to breath it, and I don't want to wear any of that fiberglass. Makes me itch just watching it turn. Take Care and Stay Safe. Bob
Keith, my screen on my iPad was starting to delaminate so when I took it in to be repaired they said my battery was expanding from being charged. They replaced the battery and it was somewhat better.
Give a decent machinist a job like this and before the days out they might need some more tubing. "One shot and done"...Make a patch or shirt and I'm a buyer. It's too much fun to watch someone do jobs like this as if they have been doing it for years (go figure).
Very interesting! Bessey clamps are great, but the quick release, plastic ones you find at HD are garbage, although when modified they make great remote release mechanisms for theater gadgets.
The tubes are made in bulk and modified for different systems and an array of bearings , the combination of sizes is more sized to suit shaft sizes and water clearance around it.
I just learned that zip ties can be released by pushing the little 'latch. tab away from the 'teeth' of the tie. That blue tape ain't cheap either, if it is 3M.
top gun as usual, I appreciate your videos. My question is about the tool bit you use, I had a bad experience machining fiberglass, my tool bits eroded quite fast so I tryed many carbide grades with a mmixed success you don't seemed to refresh your tool bit frequently. happy new year
Unfortunately, given the composition of the material (and composites in general), the glass bit of the fiberglass tends to shred the everliving hell out of anything you use to cut it. Glass is Hard. Fiber is not, you're basically doing a constant interrupted cut. I'm sure there's custom tooling for exactly that purpose, but for the average tinker, carbide will be your best bet. And like Keith said, the bigger radius will be better due to being slightly more resistant to the grinding effect of the fiberglass.
Looking over your Clausing lathe, from back to front, we see a highly paint-worn green lathe at 27:00, with short bed. Have we been properly introduced to that machine?
Hello Keith, I machine and thread 1.5"glass tube for a SCUBA scooter I build. Also some 2.5" glass. Can't over emphasizes how damaging fiber glass dust is on machines. Would like to see how you thread this type of material,
+.250-.500 those are the kind of dimensions even I can hit! Ok, I don't know anything, but out of curiosity, assuming your boring head could extend that far, and I don't know if it can. Wouldn't it be easier to cut the outer dimension with the boring bar and just swap ends and repeat, I am assuming you will have to repeat the procedure on the other end? Or would the concentricity be to far out of alignment? Never mind, I commented to soon, the boring bar wont reach 2 foot and if it did it would be a wet noodle hung out that long. It is always educational watching you work, thanks for sharing with us!
Thanks for the video. Would it have worked on the mill to have the tube overhang the vee block by 10 inches, then use the boring bar to make both inside and outside coaxial cuts?
I have a little experience with fibreglass and seeing the thickness of those tube walls along with the heavy weave within it, I imagine its sturdy enough to handle the load without much distortion 😉
if your NOTE 4 phone is pushing apart.. i would examine the battery carefully.. they swell up just before they fail and .. none of my 3 note 4s have caught fire but the bent circuit board is dead from the bending of the battery expanding.. i miss those... my note 2 had an incredible camera with a macro focal length of about 3/4" i could photograph my finger print full screen.. only thing i could see if you ever do another of these.. when you are boring the center on the mill... how about resetting the boring bar to true the outside.. are you going to continue the bore for the cutlass bearings so a double D extractor plate could be wedged in to extract them with a bolt later in the boats life.. when i helped a friend with a replanking the bottom.. had to figure out where to install the inner thru hull propshaft plate with the cutlass bearing , the outer thru hull prop shaft plate. a single strut and a V strut.. the prop shafts were coupled 15 foot long 3" bronze shaft.. so each shaft was 30 feet long with 32x30 3 bladed props.. and 6-71 engines with 3 to 1 twin disc air shift transmissions.. yes.. counter rotating clutch discs.. and yes.. with 5 of us trying to hold a greased up shaft and slide it in.. we dropped it.. it was like catching a greased pig.. had to go back to the marine machine shop to check the straightness. my GPS measured 18 knots at 1700 engine rpm.. not bad for a 104' wooden hulled boat..
For those who are ignorant about what a stern tube does, can you give a brief explanation? i. e. why is the interior of the brass sleeve coveted in rubber and how is the tube retained and later removed when it needs replacing?
It's a marine cutlass bearing. They are held in place with stainless steel set screws, usually 4. They are machined to close tolerances and sometimes are a bear to remove and replace requiring them to be cut out. We freeze them overnight for installation. I probably replace a dozen of these a year.
Hi Keith (the other Keith ; ) I'm having difficulty envisioning how this glass tube works within a marine propulsion system. If you do a follow-up video, please provide a drawing or photo. I'm guessing a steel prop shaft spins inside this glass tube and maybe the tube supports the spinning shaft? Just curious. Happy New Year to you and much success to you in your new shop.
Please explain "stern tube", a term foreign to me. Watching you work is nice but I have no idea what these tubes are for and hence why you would need to machine them. Thanks.
How about using wire instead of tape or zip ties! Soft iron wire like rebar ties is great, eco-friendly, reusable, keep it wound around the shop-vac tube!
Another great video thanks, a question on the Cutless bearing‘s for freshwater I went to Vesconight bearings I’m curious have you ever tried that material for the salt water in your area or not I’ve been getting a much better life out of them than the classic style like you’re using there
Thank you for your videos. I’m interested in how you align your jig with the center line of machine. Also how did you creep the angle iron centered when making the jig?
Explained in my earlier videos , I show the build of the jig and it's use. It has slot locating pins on bottom side and the box tube and angle were jigged up to match.
@@KeithFenner An interesting setup you had there. As for using the crane to support the long weight, the other option would be to add counterbalance weights to the other end of the table - such as a 4-jaw chuck off the lathe :)
I did 15 and a half years as a civilian contractor in the navy yards, 32nd steet, North Island and point Loma San Diego California, I started out as a machinist helper, in 1975.
A master machinist at work is a wonder to behold
Keith, Set-up time takes a long time, but is fully needed. Even us hobby guys spend hours aligning parts up. The actual machining takes minutes. Your a “Real” Machinist. Oh yea, if we fixed up all the little things in our shops, we would be stuck for a whole month. I loathe fiberglass! See ya in Fla. love the kids singing the Pledge.
Kieth great episode, You are like your old self. Thanks.
Fascinating! My Dad and Grandfather were both Tool & Die Journeymen. I knew they were very skilled craftsmen but I have gained a new perspective on how gifted they were when, in retirement, I am attempting to develop some basic machinist skills simply as a hobby so I may honor and appreciate just what a formable skill a machinist possesses. I am awed and humbled by the craftsmen and their knowledge and skill I see on RUclips. Their precision work is a joy to behold. 🖕🙏🏼🇺🇸🖖
Awesome video. It is new years eave and I would rather watch you pass on what you have learned instead of doing all the new years stuff! Thank you so much and may God bless you and your work.
Keith I’m an armature machinist, so my comment is from that perspective, your content is varied and fantastic, I was so impressed with you innate professionalism, the discipline you maintain with removing the chuck key from the chuck when you’re not opening or closing, eg whilst adjusting for the 6 inch chuck was amazing, it’s so deeply ingrained. You did not leave the chuck key once when it shouldn’t have been in, very instructive, thank you.
Glad you are back on deck . Another fine video .. thanks for your valuable time ..
Nice to see you relaxed and laughing again. Hope you had a great Xmas and Happy new Year.
Keith, I swear to god, you have forgotten more about this stuff than most people could learn in a lifetime.
I'm just a fan, hope you appreciate how much that means as a testament to your true expertise.
Thank you for stickin with it during the crap you had to deal with over the last few months.
When I read the title I thought :"THIS I gotta see"! Thinking Glass tubes, instead of 'glass tubes. ;)
Also I reuse zip ties all the time. Just tickle the "ratchet pawl" part with my tiny pocketknife ...
Complications aplenty for marine shafting machining setup and you're being such a jolly fellow just after the holidays. What a great way to wake up. Thanks Keith!
Keith, Just want to share that you are a true inspiration to current and future machinists out there. The amount of knowledge and foresight you share with the world is truly amazing.
It's GREAT to see your videos on U-TUBE.. Thanks very much... Dave
Thank you for sharing Keith love seeing the way you do things from set up to thought processes, I always get somthing out of it.
Got my vote right away Keith Beautiful intro.
Ah making a stern tube. Was a machinist for 11 years at a major shipyard. Did a lot of cool stuff. Great video!
Hi Keith. There are zip ties made from Velcro. I use those for temporary things. You can easyly open them up and use them over and over again…
you can buy velcro material from a sewing/fabric store as well as at Home Depot too ( used to wrap electric cords or any use you need )... for the same use.... re-useable straps or tie wraps...yep...
I use those all the time for cables. Great for organization
I'm so glad to see you again Keith!
That part is exactly why I have my VM tables in perfect alignment with my lathe bedways.. It's those extra long parts that most shops walk away from, that I love to tangle with. I watch your channel quite a bit since you are Old School, Highly skilled. Our shops could be twins. Excellent work Keith!!
Well done Keith. Another good job and I would like to wish you a very happy new year from Thailand
Happy New Year
I have found that the drywall dust bags they sell for shop vacs do a good job of collecting fiberglass dust. Plus they save the very expensive heapa filter.
THANKS Keith for another lesson in my apprenticeship. It's the set ups that are the Aha moments for me. Keep up the great vids.
Well presented there Mr Keith👍
Hi Keith not and easy job turning fibre glass tube at that distance between chuck and steady deflection and out of round makes the job difficult. Late 70's I turned a number of large fibre glass coated rollers for paper pulping plant.. yeah glass fibres are a pain . Good to see you back.
So interesting to see how you approach the various jobs you do.
I learn so much watching your videoes.. all the small tips, like your tube holding. As always your the best youtube educational entertainment. Hope you will have a great new year! Best from Denmark.
Love your vids you got me into metal again just got a 14-40 doall lathe:) you inspire and teach me you are an artist. thank you so much!! Alaska its not ez to find good tooling:(
i would have thought there was lots of tooling in alaska...industrial sized way too big for normal use stuff lol. and it wouldnt be the north if there wasnt a way to work around it or to jerry rig it or to just make it work lol
@@mobiousenigma We get the trash the lower 48 throws out. there is some mil surplus but the owners are like ""FROM MY COLD DEAD HANDS!!!!!LOL
@@bearbait2221 kinda like northern quebec then lol
at least it isnt crowded up there yet still enough space to sit and think
@@mobiousenigma Ya you still can piss out ur door LOL
@@bearbait2221 sink is easier and it aint frozen when it hits the drain 8P
Merry Christmas Keith!! I'm very happy to see you back in operation and looking better than ever.
cool beens! I always learn something! Nice job making the new Boaring bar.
The Master at work. Thanks Keith!!
I had never seen glass tubes machined before. You make it look deceivingly easy. How many pieces of tube did you destroy before you got it down to a process that worked. As always, you teach me something new with every video. I'm like you, I don't want to breath it, and I don't want to wear any of that fiberglass. Makes me itch just watching it turn.
Take Care and Stay Safe.
Bob
Woohoo, a new video!
Mechanic hack- If you use a torx bit in those allen screws you'll get a little more bite for a while.
Best intro ever!
🦅 🇺🇸 👍
Great Vid once again.
The variety of stuff you tackle in your shop is unparalleled.
No job is too dirty, no salary too high :D
Stay safe.
Great set-up and ingenuity Keith, that boring bar has seen some 🎬 action.
As always thanks for sharing, and may I wish you a safe 2022.
Merry Christmas and Happy New Year, Keith.
Thanks for making videos and sharing a part of your life with us. I enjoy it and I get to learn something.
Keith, my screen on my iPad was starting to delaminate so when I took it in to be repaired they said my battery was expanding from being charged.
They replaced the battery and it was somewhat better.
Reason for longer lathe! Wonderful work as always!
Nice and creative....good job, Keith!
Great video. Nice setup. Great machining. Thank you for sharing.
Give a decent machinist a job like this and before the days out they might need some more tubing.
"One shot and done"...Make a patch or shirt and I'm a buyer.
It's too much fun to watch someone do jobs like this as if they have been doing it for years (go figure).
My shirts are on teeblaster
Very cool have a great week
Keith, the best part of your video was the kids saying the pledge of allegiance. Young patriots.
Hello Keith,
A very interesting video... nicely explained as always... Wishing you a great 2022,
Take care.
Paul,,
good video MR FENNER and happy new year
Very interesting! Bessey clamps are great, but the quick release, plastic ones you find at HD are garbage, although when modified they make great remote release mechanisms for theater gadgets.
Happy new year Keith , I don't understand why they don't put in an accurate bearing register with they layup the fiberglass tube .
The tubes are made in bulk and modified for different systems and an array of bearings , the combination of sizes is more sized to suit shaft sizes and water clearance around it.
Not the kind of glass I had in mind. lol I don't guess you can heat straighten that fiberglass?
Hey BigBlok I agree,
Tok’n Glass pipe is above my pay grade..
Thnkn Keith’s new dirtleg likes a heat an’ beat..she sounds fun ;)
Sehr gut gemacht! Mach weiter so!👍👍
I just learned that zip ties can be released by pushing the little 'latch. tab away from the 'teeth' of the tie. That blue tape ain't cheap either, if it is 3M.
I been picking them up for years to reuse ... I have self described as a 'packrat from hell' though
Muy buen trabajo, enhorabuena 👏👍
top gun as usual, I appreciate your videos.
My question is about the tool bit you use, I had a bad experience machining fiberglass, my tool bits eroded quite fast so I tryed many carbide grades with a mmixed success
you don't seemed to refresh your tool bit frequently.
happy new year
I use a little more radius on the tip and most the time grade 2 carbide does the best.
Unfortunately, given the composition of the material (and composites in general), the glass bit of the fiberglass tends to shred the everliving hell out of anything you use to cut it. Glass is Hard. Fiber is not, you're basically doing a constant interrupted cut. I'm sure there's custom tooling for exactly that purpose, but for the average tinker, carbide will be your best bet. And like Keith said, the bigger radius will be better due to being slightly more resistant to the grinding effect of the fiberglass.
@@orangedream267 The fibre is glass, so perhaps you mean the resin, being softer and weaker, causes the interrupted cut.
Good video Happy New Year.
Merry Xmas Happy New Year everybody
DAMMIT Keith. Thanks once again for taking the dummy out of me!
Much appreciated Sir.
00:50 is that a new Monarch there? on the right
Different machines for boring I've never seen but it's standard in its processes for larger diameter materials.
Wow, what’s the new lathe?
Olá amigo Keith!!!
Gosto do seu trabalho e das suas explicações com seu bom humor!!!
Desejo um Feliz Ano Novo a você e a todos!!!
Grande abraço!
Hey Keith, Go to Hobby Lobby and get a roll of Velcro tape about 1/2" wide. As good as zip ties but reusable..........
Looking over your Clausing lathe, from back to front, we see a highly paint-worn green lathe at 27:00, with short bed. Have we been properly introduced to that machine?
Great video production/discussion/build…..interesting HNY
✨ Happy New Year ✨
I assume that you are machining these tubes for marine cutlass bearings. I use the same tubes on sport fishing boats that we build.
You do some nice work! TY! Just subscribed.
Hello Keith, I machine and thread 1.5"glass tube for a SCUBA scooter I build. Also some 2.5" glass. Can't over emphasizes how damaging fiber glass dust is on machines. Would like to see how you thread this type of material,
BRAVO!!!! just: man for real...BRAVO.
Man, Buffy's a Sasquatch! Man, is that thing tall...
+.250-.500 those are the kind of dimensions even I can hit! Ok, I don't know anything, but out of curiosity, assuming your boring head could extend that far, and I don't know if it can. Wouldn't it be easier to cut the outer dimension with the boring bar and just swap ends and repeat, I am assuming you will have to repeat the procedure on the other end? Or would the concentricity be to far out of alignment? Never mind, I commented to soon, the boring bar wont reach 2 foot and if it did it would be a wet noodle hung out that long. It is always educational watching you work, thanks for sharing with us!
Keeeeeeeeith!! Love it! Thank you 🙏
Thanks for the video. Would it have worked on the mill to have the tube overhang the vee block by 10 inches, then use the boring bar to make both inside and outside coaxial cuts?
Not enough table travel
You da man Keith
Good one ! Cheers .
Always interesting thanks for sharing. :o)
Keith the gray paint on your lathe is beautiful! Can you share what you used on it?
Rust-oleum smoke grey
I don't have a fell for fibreglass rigidity. How much do those clamps squeeze the round to an oval?
I have a little experience with fibreglass and seeing the thickness of those tube walls along with the heavy weave within it, I imagine its sturdy enough to handle the load without much distortion 😉
Banner your outside flag or let it stand proud.
IT NEVER BOWS.
I think a roll of tape costs more than 100 zip ties! lol Maybe Velcro, it's reusable!
Thanks Keith
if your NOTE 4 phone is pushing apart.. i would examine the battery carefully.. they swell up just before they fail and .. none of my 3 note 4s have caught fire but the bent circuit board is dead from the bending of the battery expanding.. i miss those... my note 2 had an incredible camera with a macro focal length of about 3/4" i could photograph my finger print full screen..
only thing i could see if you ever do another of these.. when you are boring the center on the mill... how about resetting the boring bar to true the outside..
are you going to continue the bore for the cutlass bearings so a double D extractor plate could be wedged in to extract them with a bolt later in the boats life..
when i helped a friend with a replanking the bottom.. had to figure out where to install the inner thru hull propshaft plate with the cutlass bearing , the outer thru hull prop shaft plate. a single strut and a V strut.. the prop shafts were coupled 15 foot long 3" bronze shaft.. so each shaft was 30 feet long with 32x30 3 bladed props.. and 6-71 engines with 3 to 1 twin disc air shift transmissions.. yes.. counter rotating clutch discs.. and yes.. with 5 of us trying to hold a greased up shaft and slide it in.. we dropped it.. it was like catching a greased pig.. had to go back to the marine machine shop to check the straightness. my GPS measured 18 knots at 1700 engine rpm.. not bad for a 104' wooden hulled boat..
Im sure they make lamp posts out of that spun glass, so technically speaking, did you just make a stern tube out of a lamp post?
LOL
For those who are ignorant about what a stern tube does, can you give a brief explanation? i. e. why is the interior of the brass sleeve coveted in rubber and how is the tube retained and later removed when it needs replacing?
It's a marine cutlass bearing. They are held in place with stainless steel set screws, usually 4. They are machined to close tolerances and sometimes are a bear to remove and replace requiring them to be cut out. We freeze them overnight for installation. I probably replace a dozen of these a year.
@@mikebeasley553 Thks. I did a Google search after your description. Amazing to use flutted rubber as a bearing submerged in and lubricated by water.
Hi Keith (the other Keith ; )
I'm having difficulty envisioning how this glass tube works within a marine propulsion system. If you do a follow-up video, please provide a drawing or photo. I'm guessing a steel prop shaft spins inside this glass tube and maybe the tube supports the spinning shaft? Just curious. Happy New Year to you and much success to you in your new shop.
Keith,
U sure know ur away around those BIG PIPES!!
What’s ur current fav pipe dope to use??
Rectorseal
@@KeithFenner
it better be a legal narcotic :)
@@KeithFenner I instantly thought Hunter Biden😖
Keith, did you grind a tool to cut the fiberglass, or is it an insert you use for metals?
Brazed carbide general purpose grade
159B is a great number
How do them inserts hold-up cutting that glass ?
Modern-day shaft logs?
Please explain "stern tube", a term foreign to me. Watching you work is nice but I have no idea what these tubes are for and hence why you would need to machine them. Thanks.
How about using wire instead of tape or zip ties! Soft iron wire like rebar ties is great, eco-friendly, reusable, keep it wound around the shop-vac tube!
Another great video thanks, a question on the Cutless bearing‘s for freshwater I went to Vesconight bearings I’m curious have you ever tried that material for the salt water in your area or not I’ve been getting a much better life out of them than the classic style like you’re using there
All cutlass bearings should be changed out in three years, I see less than 1 composite shell bearing in a couple years.
Would the chuck jaws on the lathe not go inside the bored end of the tube? Is that why you used the 6" chuck?
yep 😊
I thought you were going to pull the tube off the V block an inch or two so to mount it more parallel off the belled end ?
he did, you can clearly see the tube jumps forward past the bell mouth, meaning he skipped showing it 😉
@@GaisaSanktejo Thanks - I was expecting probably more overhang !
Thank you for your videos. I’m interested in how you align your jig with the center line of machine. Also how did you creep the angle iron centered when making the jig?
Explained in my earlier videos , I show the build of the jig and it's use. It has slot locating pins on bottom side and the box tube and angle were jigged up to match.
Duh, after all this time I see. Joe Pieczynski built that miniature model of your drill press. I knew I had seen it somewhere.
Haven't you got enough travel on the Y axis for this operation so you can use the horizontal spindle ?
No
@@KeithFenner An interesting setup you had there.
As for using the crane to support the long weight, the other option would be to add counterbalance weights to the other end of the table - such as a 4-jaw chuck off the lathe :)
Why is the tube made out of fibreglass?
To match and glass in t o the keel of a glass boat 🚢
@@KeithFenner ok thx you know lots of marine stuff
You can buy reusable cable ties.
Very interesting. You Navy guys work on some cool projects. Did the Navy train you or were you a machinist when you joined?
I did 15 and a half years as a civilian contractor in the navy yards, 32nd steet, North Island and point Loma San Diego California, I started out as a machinist helper, in 1975.
I'm telling Santa you need a six jaw for Christmas. Thank me later if he pulls through.
3:42...fiberglass dust is extremely abrasive- AND YOU SURE AS HELL DON'T WANT TO INHALE IT!!!