An up cut or up spiral bit cleans the shavings but a down cut or down spiral bit seems counterproductive. Reply. X. Replies. WayneL5 | Mar 26, pm | #1. You'd use a down spiral in any situation in which lifting up would tend to tear at the surface. Some examples include wood that splinters easily, veneer, and laminate. Usually such bits are used along an edge so chips wouldn't collect. charlesm | Mar 29, pm | #2. You use a down spiral when surface finish is important and chip clearance isn't an issue (such as for shallow cuts or when inverted in a table). The up. Spiral bits plow through material the way business jets slice through the sky; but neither of these high-tech tools fit everyone's budget. Like a coach-class airline ticket, a standard straight bit gets you where you need to be, and for a lot less money. So why pay for the upgrade? Up- and down-cut flutes meet in the middle of the bit (below) to compress veneer on both faces of a panel tightly against the substrate. These big three have been joined by such specialty spirals as bearing-guided up-cut and down-cut flush-trim bits for template work and combination bits with short up-cuts and longer down-cuts for chip-free mortises. On a combination bit, the down-cut and up-cut flutes both press veneers against the particleboard substrate. When to turn to spirals. WHY SPIRAL BITS ARE BETTER FOR PLUNGE CUTS. Because a spiral bit is designed much like a drill bit, it makes plunge cuts easily. The cutters of a straight bit do not overlap, so if you plunge straight down deeper than 3/32 in., you might burn away the wood in the middle, but you won’t cut it. The increasingly popular spiral router bits borrow technology from the metalworking industry. Spiral bits look like drill bits and are most often made of solid carbide, so they are super sharp and leave a superior cut on wood. Two flutes ground around the body of a spiral bit smooth vibration by spreading.
Tool selection is critical when it comes to achieving a desired surface finish, Up Down Spiral Router Bits Ios tool life, or cut speed of a specific material.
Tooling manufacturers go to great lengths to engineer tools to deal with specific aspects and properties of certain materials. Selecting the right tool for the job could determine whether a job fails or succeeds. Upcut spiral tools are the most popular type of spiral fluted tool. Splral these for grooving apiral slotting, for upward chip vd and best finish on u; bottom side of the part. These bits allow for rapid cuts since the tool clears the chips away from the material.
While ideal dpiral cutting thicker materials, this type of tool is not recommended for thinner or softer materials. When working with these types of material, the upward force can pull the material causing a ragged finish on the top surface, or even worse, eject the part from the table.
This type of geometry is used whenever the best finish is needed on the bottom side of a part. Downcut spiral tools are best used for thinner materials which will be pushed down into the machine bed rather than being lifted with an upcut spiral. This can be particularly useful when using vacuum hold down where maintaining the seal between the material and sacrificial up spiral bit vs down spiral bit ya is crucial. These tools are predominantly used when a high quality cut finish is required on the top surface of cut parts.
Downward spiral tools often require reduced cutting speeds because the chips are pushed back into the material. Odwn chip extraction is generally less effective with this type of tool than it is with an upcut spiral tool. You can purchase general purpose downcut bits or dedicated tooling for up spiral bit vs down spiral bit ya, plastics, aluminum, and other non-ferrous metals. You can find them all at our one-stop shop. Select Language English French Spanish.
Sep 10, · An up spiral will clear chips from a non through hole, but might cause surface fibres to tearout at the router face of the surface. Should leave a good surface at he tip end of the job once it penetrates through. A down spiral will push chips into into the recess and pack them in there during a non through cut, soneeds shallow cuts and frequent clearing of waste. Since I've worn out my 1/2" and 1/4" bits, I'm looking at spiral bits from whiteside as replacements. I will use them both in handheld applications, and in a router table. Mostly they will be for Dadoes. Should I be looking at up cutting or down cutting bits? Aug 15, · The three basic cutter configurations for spiral bits are up-cut, down-cut, and a combination of the two, known as a compression bit. A down-cut bit sends the chips downward; an up-cut bit sends them up to ward the shank. (On a router table, all direc-tions are reversed.)5/5.
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