Hand jig saw stops cutting - makes whirring noise - then restarts
I am cutting 3/16 perforated aluminum sheets, free hand lines. I have two older jig saws. Both worked fine for their first 10 feet, now both make this whirring noise and will not proceed until the whirring stops when I back off on the cutting - then they (each) will work for another 1/4'' of cutting.
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Re: hand jig saw stops cutting - makes whirring noise -...
Jig saws are not made to cut through aluiminum espescially that size. That is really thick and it sounds like you have worn out the motor trying to cut it. If the saws are hot. Let them cool down then proceed but like I metioned before you are putting a lot of stress on something not made to cut aluminum even with a metal cutting blade
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I do not know which jig saw you have, but here are two generic answers.
1) Be sure the guide wheel that is behind the blade is nearly touching the rear of the blade.
If it is loose, the blade is more free to turn one way or another whilst cutting.
That wheel is round and has a groove or slot in it for the back of the blade to ride in.
2) Be sure the blade is sharp and has the right amount of teeth for the job.
A dull blade, or one made for another kind of material can give you trouble.
God bless your efforts.
No. A table saw IS NOT safe for sheet metal cutting. I have seen bar stock aluminum and copper cut on a table saw (at least 1/4 inch thick) but trying to cut thin sheet metal would be a bad idea. The two main problems are that the sheet metal is too flexible and the teeth are much larger than the material is thick.
This is a common issue with jig saws. There are sometimes larger blades, but all seem to distort to some degree. The only real solution is to go slow enough to allow the blade to return to it's normal shape...Essentially, is sounds like another tool would work better, but often you are scrolling with a jig saw and circular saw (for example) would not work.
The other workaround involves several cuts, so the final cut is removing much less material.
You can forget about the table saw, If you are cutting through the back of the material to avoid the tear out of the work, the table saw is not what you want. I would do the receptacles with a jig saw or router. The table saw could still be used for cutting windows out and panels. 3000 x 1200 is what, 4 x10 feet? Plywood? Drywall? You know what we do? Instead of making a panel fit the old box, we get new work boxes, the ones with the clamps on them, we put the hole in the middle of the wall, no stud, and put the box in later, saves time and money and you get a straight line.all the same. Hope this helps.
use a combination sliding square to mark ecxactly where you want to cut. Measure the distance from the jig-saw blade to the edge of the jig-saw bottom plate. Use this distance to mark another line parralel to the first line. Nail or screew a straight piece of wood on the second line. Put the jig-saw plate against the wood fence and cut your perfect line.
check that surface plate is square with the blade.don't push too hard,or force the saw,let it cut at it's own speed,guide rather than force.a scroll saw or band saw is more accurate as you control the work piece instead of the tool.
a jigsaw is for cutting wavy lines if u want a straight cut use a rip saw with fine blade but you still can use a jigsaw must have sharp blade there is a blade u can get now from screwfix with a triangle spine on the back off the blade to prevent it twisting works fine (also do not push hard on the powertool let the blade do the cutting less likely to wander hope this is of help
Hi, The reason for a down cutting blade is to see your cut on the finished side of laminates ( which include veneers, plywoods, plastics, formica . When using an upcutting blade on laminates the smooth cut is on the bottom, which you can not see till you are done and turn the work over. Reversing the teeth allows that smooth cut to be on the top. This is usually done on smooth flat surfaces as you have found out and does not work with orbital or tight scrolls. As far as the pushing or pulling, smooth cuts in laminates require the saw doing the work at a speed that allows the teeth to cut and remove material with biting. So if you are biting, (This is a much slower process than pushing your jigsaw through regular wood) check that you are not pushing too hard and that your blade is still sharp. Good Luck to you, this should Fixya!