Changing a drum sander belt with maths and toilet rolls

The wonderful world of mathematics, maths or math can work wonders on cutting your sandpaper to size for your drum sander.
Sandpaper used is Hermes BW110 150 grit aluminium oxide paper 90mm x 10m.

[@118Flyboy]

Hi Sarah, I live in Belgium and bought me the PowerMatic PM2244 drumsander. Afterwards I had difficulties finding pre-cut sanding paper for this machine at a local store. The standard was a 76mm wide roll. I could not find paper with the same width, at least not locally. So I bought a Klingspor J-Flex roll with a width of 50mm which I could find here locally. Then I used the calculations on your video and BAM, perfect fit. Thank you for making this very clear video!!! Kind regards, Patrick

[@JohnnyBlue99]

Thank you Susie!! Finally an explanation so clear that even I can understand the concept.

[@raymondparr2775]

You are brilliant, Susie! I’m almost done with my 36” drum sander thanks to you.

[@barriedavies5058]

Best explanation by far I am no good at maths but this made it very easy for me to understand. Thankyou Susan

[@genebodenberger]

Thank you so much. I did a search to learn what you taught and all I got was pull the old paper off and use it as a template. I am building a sander for Ukulele making and I wanted to do it right this time.

[@chris_thornborrow]

haha love the party trick surprise - total respect!

[@yorkshirefazer]

many thanks for this. got myself a drum sander and really don't want to pay the silly price (and wait an age for delivery!) when i can get rolls of sandpaper locally.

[@MrProfgalax]

¡¡All my life as a luthier looking for this!!...Thank you,...Thank you...Thank you

[@aysenluthier]

thank you so much for this info! I still can't believe I tried it only once and the results were almost perfect!

[@nesnah73]

Big like for the series, and extra bonus like for the science part with math. Good example for me to show my daughter how math is applied in everyday things. A little tip regarding the clamps for the paper might be to have them spring loaded, so when loosening, they will pop up a bit for easier mounting of the sandpaper.

[@Stephens8x6Workshop]

Nice demonstration :-) Speaking as an ex teacher you would make a good maths teacher.

[@yluvaqui]

Thank you very much Susan..

[@a.j.simmonds6324]

exactly what I've been looking for. now my Harbor Freight Rolls fit my Jet 1020

[@PitchPerfectPianos]

Genius! I love it! This is my kind of KZbin tutorial. Thank you for this.

[@polakis1975]

Each time i change sandpaper i have the same problem with my iPhone for several days hahaha. This is where face recognition comes handy!

[@roberthemmelgarn6884]

Thank you for this presentation. Question #1; When starting the wrap around does the cut edge / side or the parallelogram, run along the edge of the spondle? Question #2. Which direction should the wrapping begin? With the feed, against the fees, Doesn't matter?

[@alanmiller4012]

That's great. Thank you so much. I just finished my own drum sander and was wondering how to calculate the paper placement.

[@Peter-qd2wp]

Hallo Susan, works very good. Thanks for sharing.

[@stevensexton5801]

LOL, I've only memorized PI to 3.14159. You are much more a Geek than I expected. Cheers!

[@MarkMcCluney]

got a Triton spindle sander cos you recommended it. very pleased, so thanks. happy new year!

[@lucagobbi5974]

Grazie Susan, sei veramente brava, molto utile il tuo tutorial.

[@andrewbyron6048]

Very helpful video thanks for posting! I think you might find it easier to keep tight by using velcro and matching sand paper.

[@atowning]

A great build, perhaps the best drum sander one I've seen on youtube so far, If I'm allowed to throw in my little piece of adviice it would be to trim the sand paper back to match the shape of the end clamping block where it covers it restricting access, would only be a small trim. other than that I've learnt a few tips watching this build. Looking forward to your next build :)

[@SusanGardener]

+Andy Towning What I've learnt with paper backed abrasive is that you mustn't have any hard edges or corners that could catch or you'll rip the paper. You can trim the paper back but you must do it with smooth curves. This wasn't such a problem with cloth backed paper. I had a small rip occur where an edge caught but fortunately it didn't come off the drum - it did give the work a bit of a kick, but no damage was done. I trimmed the rip smooth and didn't need to change the paper. The Hermes paper backed actually works better than the expensive Abranet Max as it doesn't stretch, however it does clog. Abranet doesn't clog at all as it's an open mesh, but it stretches and becomes loose at the right hand edge so the depth of cut increases by 0.5mm - ok for narrow pieces but bad for sanding panels.

[@garthn2561]

That reminds me of learning pi to 200 places when I was a kid - then being made to recite and repeat it in class. 40 years later, I only remember 30 places...

[@Heathfloors]

Hi, another informative and interesting video.. You probably know this but dried up silicone sealant(old tube) makes a great cleaner for sanders.. Cut the end of the tube off and hold the dry silicone against the drum and move across.. Works a treat

[@SusanGardener]

+Heath Cope I'd seen the blocks you can get in specialist tool shops but I didn't know that silicone sealant is a substitute. I have a half used tube that's still liquid - I'd better get drying it out :-)

[@jimbo2629]

Susan Gardener you can't use a drum sander without using a belt cleaner after each pass, otherwise you will be changing belts every day😀.Dust extraction is not enough. I actually use mine as the wood is going through. They are on eBay and Axminster sell them. When I bought my drum sander years ago Axminster gave me one for free. I have one beside every sander, disc, belt and drum. My belts last for months. On you tube videos I rarely see them used.

[@bitweisor8208]

Using silicon to clean sanding belts might not be suitable for guitar parts in that impregnating silicon into the wood may have an adverse effect on non-silicon finishes.

[@DogeDelecto]

I love how informative your videos are! You should moon-light as a teacher.

[@JohnClothier]

Great Video! A thought to help you with this and perhaps a future video; What about using a stepper motor to rotate the drum slowly. That way you could hold the end of the sandpaper taught and guide it while it does the work.

[@mcdowell356]

I,ve found using double sided tape (1/2") one my roller works very nicely to keep the sandpaper tight while installing . Love your videos . Thank you .

[@stanzee100]

I was thinking of a line of spray adhesive across the entire length. It might give a little more holding power. It sounds to me like either system would work.

[@siwhite]

Spray mount would do the trick I think

[@aungmyat7242]

Thank You Very Much.

[@FranklinArtSite]

Maybe you have thought of it but I think a spindle lock would be a major help in this process. I would suggest a pin through the pulley and shroud.

[@bird197196]

Cut a slot in your 2 clamp blocks, and slide your paper into that slot. When you tighten down your clamp blocks it’ll pull the paper in tighter.

[@TheGuitologist]

Nice parlor trick. I can recite all the US presidents in order from memory. 45 characters. Subbed, by the way. Good channel.

[@celso01s]

Great video

[@martinpook5707]

Just a thought; if the end disc was able to move on the shaft so that it could have the end of the paper clamped and then turned to tighten and then clamped to the main roller using similar bolts to the paper clamp. Next time!

[@joaoholanda4585]

PARABÉNS, A MELHOR EXPLICADORA QUE JÁ VI NO KZbin ESTOU TE ACOMPANHANDO E APRENDENDO.

[@deepconcept2020]

Thank you! You are amazing

[@LovelyKauai]

Thanks for the update!

[@anthonymax6395]

Perfect.. Thank you

[@marcorojas1130]

Hello, great videos Do you think is better the paper for sand paper or fabric? Saludos

[@mujiwala]

You got it a bit wrong. The tapered cut is not equal to the circumfrance as it runs obliquely and not straight around.So that cut edge will be longer than the circumfrance making the angle wrong and hence the following wraps.

[@LovelyKauai]

How about using a thin wedge near the first wrap to hold the drum still (like those made for shimming a door frame) once you are re-tightening the following wraps to the end. Btw. Did you consider using PVC or even steel pipe for a drum? Wood is your medium but it has properties that might make it a better material for a drum, e.g., less expansion from heat or perhaps a more balance drum due to a laminate, etc.

[@joshsundiwa]

Thanks for sharing

[@paulcalverley4687]

Nice vid and love the homemade sander... great job.. so if i use a slightly wider belt and use your method will it still finish in the right place??

[@canalteocratico611]

Aunque no te entiendo eres una máquina. Enhorabuena

[@cncdavenz]

Hi Susan, Maybe a small amount of contact spray adhesive on the sand paper back would help with grip. Cheers Dave

[@akquicksilver]

Yeah, but can you cook? LOL! Great work! Now I will be having Geometry class nightmares again! Haven't had those for over 40 years!

[@arturoherrera5083]

like the drum sander build. Could you have had the last disk rotate a little so you could adjust the tightness of the sandpaper?

[@mmattster]

Great vid cheers, if you could lock the drum with a locking pin through the pully or with a different method it could possibly aid you when tightening the glass paper on the drum as i could see half your effort is used holding the drum still, just a friendly observation. Nice bit of kit all the same.

[@Bizman62]

You'd need some sort of a stopper to prevent your roll from rotating during tightening the sandpaper. A nine inch nail in a pre-drilled hole at the end of the drum would work despite being ugly.

[@alphasigmasezon8597]

Great job

[@robertlohman8947]

Brilliant !

[@Titchtheclown]

Making pencil marks on the back of the sandpaper is a lot less rough on the pencil.

[@gbspikyfish]

I tried this loo roll method and I'm just not having good results. A pack of Andrex doesn't seem to take much off a piece of timber. Should I be using Charmin Ultra instead? Ahem. Very useful video - thanks. It occurs to me that some sort of spindle lock (as usually present on lathes) would be quite useful when trying to tighten the paper. A wedge between the table and the drum (near the left side) would be a simple solution. Some sort of a pin that engages with the end of the drum might be better though.

[@SusanGardener]

+gbspikyfish you need Tesco value toilet paper -rough! You're not the first to suggest the lock. I may try putting a pin through the end.

[@gbspikyfish]

Tesco Value Loo Roll: or "(Rougher than a) Badger's @rse" as it's more commonly known :)

[@Redthumb45]

Thank you, I needed that.

[@walterrider9600]

thank you

[@CryoGenUK]

You need some way to lock that drum and stop it rotating to help you get the sandpaper tight, a drill hole and a rod would be a simple way. :D Nice video, thanks.

[@SusanGardener]

+CryoGenUK I was thinking that as I was doing it. Good idea!

[@MarkMcCluney]

I forgot to ask - what's your wee theme tune?

[@SusanGardener]

+Mark McCluney It's a piece of library music called Vino. I don't think it's a published song. I'm thinking of re-recording it myself. Glad you like the Triton spindle sander - it seems a good piece of kit. Put some oil or wax on the deck - I got a spot of rust on mine

[@MarkMcCluney]

Susan Gardener cool! I'll look forward to hearing your version!

[@tomahoks]

Doesn't a roll leave a tiny tiny bit of a wave to the object at sand? Maybe it is so small, that it does not matter.

[@mikkosutube]

susan..you must be the life of the party...at least for the men!

[@guillomotol]

Thanks so much for your video. It is very interesting. I tried to calculate a sand paper for my drum but i couldn´t do. I am using a drum of an old printer. It is 36 mm of diameter, 415 mm width, circumference 115 mm, diameter of the drum 36 mm. I think to use sand paper of 90 mm width. It gives me 530 mm lenght of paper, but I couldn´t calculate the cutting line for sand paper. It gives me 113 mm, but it doens´t work. I would appreciate if you tell me how to calculate it. Thanks in advance.

[@chrisfxwolf]

Mathematical point of view is ok. However, you need a velcro.