How do you make your sand blocks?

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How do you make your sand blocks?

How do you make your sand blocks?

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Massimiliano	M Massimiliano posted 4 Years Ago HOT Topic Details
M Group: Forum Members Posts: 167, Visits: 1.1K	Hi, what do you use as sand blocks for fairing? I watched some tutorials but they were all about wood working. Wonder if there is some adjustment specific for composites. So... Wood (btw, with or without pads)? Foam? Xps would be ok Commercial available? Ifound permagrit blocks fantastic but they only make the coarser grits. Thanks
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How do you make your sand blocks?

mporta71 - 4 Years Ago

Get a 3M Hookit sanding block. Pricey, but absolutely worth the price, they are so good. Will make getting a flat surface much quicker and easier.

Hanaldo - 4 Years Ago

Thank you. I see there are many options, with or without vacuum connection and a long (70 cm) one. Which one(s) do you recommend?

mporta71 - 4 Years Ago

Vacuum really helps and works great, I would definitely recommend it. Even if you dont use it, it's nice to have the option. I wouldn't get the long one or the medium one though. I have them, but...

Hanaldo - 4 Years Ago

Thanks a lot!!

mporta71 - 4 Years Ago

There are plenty of sanding blocks on the market. You can even make your own carved from a stiff foam (or even wood). Sometimes if you have a fixed shape a custom block can be useful.

Warren (Staff) - 4 Years Ago

Thank you!

mporta71 - 4 Years Ago

if you are sanding specific geometry you can 3d print the blocks, allowing for an offset for the double sided tape and sand paper. Currently just using a whole load to sand some carbon wheels, also....

scottracing - 4 Years Ago

Thanks Scottracing for the 3d print hint! I already have the permagrits, unfortunately they stop at a quite coarse grits. Fantastic tools though!

mporta71 - 4 Years Ago

yes i can highly recommend the 3d printed sanding blocks for specific geometries. i mostly use PETG as it is easy to print but a little more temperature resistant than PLA. And often you can just san...

SleepingAwake - 4 Years Ago

Thank you Lester! I don't own a 3D printer but considering to buy one. Any recommendation?

mporta71 - 4 Years Ago

I use Prusa printers privately and at work and only had good experiences with them. There are a lot cheaper printers that work well too but they are more of a toy than a tool i feel like. The Prusas....

SleepingAwake - 4 Years Ago

Thank you, I will have a look at them!

mporta71 - 4 Years Ago

You can cast-in-place sanding blocks with some packing tape on your surface, some polyester filler (Bondo) to take the surface shape and a wood backer to hold on to... I'm a big fan of the 3M yellow...

explorecomposites - 4 Years Ago

Lot of ideas, thank you!

mporta71 - 4 Years Ago

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