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30.05.2020Like all dedicated woodworkers, I have no problem generating copious amounts of dust and debris. With new shop vacuums, even the most basic models are quite capable, making the dreaded cleanup job much more convenient, effective and enjoyable. Efficient filters and well-sealed tanks are standard with most current models, and design and engineering advances have resulted in vacuums that fit the needs and budget of almost every woodworker and DIYer.
I evaluated eight shop vacuums, from very affordable general-purpose models to high-end dust extractors for professionals and serious and well-heeled woodworkers. Whether you need to clean your shop floor, extract dust from a power sander or suck up a small flood in your basement, one of these units has you covered. I found that all of the tested vacuums provide more than adequate suction for their intended use.
Almost any vacuum will suffer a decrease in performance as it fills with debris, and the finer the dust particles, the more rapid the decline. Hose diameters and lengths vary considerably, but the short explanation is that a larger-diameter hose moves more air and is good for picking up bigger objects, while a smaller hose increases air velocity and is better for sucking up dust.
A long hose gives you more reach for cleaning or collecting dust from a tool without having to move the vacuum. Most of the vacuums come with a standard-duty pleated filter, but other choices are available, such as filters for heavy-duty applications and HEPA high-efficiency particle air filters that trap microscopic dust. Note that installing a HEPA filter does not necessarily mean a vacuum is certified for hazardous material mitigation.
Models with cylindrical filters that extend into the canister will suffer most quickly as the canister fills and the filter becomes submerged in dust and debris.
Empty these vacuums early and often to maintain performance. Also, cleaning or replacing the filter regularly will help maintain peak performance and extend the life of the motor. First thing to do is put the bottom platen in the bag, seal it up, this is done quickly with the plastic clamping system, supplied with the bag.
Now turn on the system, and let it pull a vacuum. Next, is make sure all parts are ready. The other side is covered with veneer tape at all seams. Behind the table, you can see the upper platen, ready for use. The second are the parts to be included in this particular project.
This table has a honey comb core, for weight cutting properties, and for stability, as this is very strong. The honey comb is actually cardboard, coated with resin. We also have hardwood cross pieces to fasten the legs to. Next step, seen in photo 4, to is mix up the glue and get started. In this case, we liberally applied the glue to the recess in the table top.
The next step was to glue the back side of the M. As the vacuum is being pulled, keep an eye out for things sliding around. If it does, just turn off the pump and fix it. And begin again. After this glue up is complete, fill any voids between the M. After this has dried and been sanded, the veneer can be glued on, in the same fashion.
Do not put the blue tape directly on the veneer, and put it in the bag. The blue tape will crush the veneer! The left hand photo show the apron ready for a fine veneer. The images below Woodworking Shop Vacuum Systems 3t show a home office we were commissioned to build. Both sides of the room had matching cabinets.
The end cabinet on each side was curved. Obviously a curved door was needed on the top and bottom of each side. The size of the form these doors required would not permit us to make them with the form inside the vacuum bag. As shown in the second photo, you can glue up the doors, place them into a vacuum bag and clamp the assembly, bag and all to the form. Had that not been a possibility, we would have had to come up with a plan B, as described below.
The first photo shows the back side of the form. As you can see it is a fairly simple design. Not too much in the way of reinforcing was needed.
A hollow form like this would have been crushed by the vacuum, had this been placed inside the vacuum bag, unless an air bladder was placed inside of the form. This bladder would provide equal pressure on the inside of the form.
On smaller projects, like the table apron shown above, a solid form is a practical solution.
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