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2024-11-04 04:20:39

Aluminum millingspeed chart

Feed per tooth, is the amount of material that should be removed by each tooth of the cutter as it revolves and advances into the work.

For the cam clamps, such as those by Ben Myers, I’ve found that some spacer strips can fix any placement issues. For example cut some MDF strips in the dimensions: 1x12, 2x12,etc. When the clamps are too far away, just place the best fitting spacer strip in there to fill the gap. It can also prevent marring the workpiece from clamps rubbing against it.

The feed (milling machine feed) can be defined as the distance in inches per minute that the work moves into the cutter.

This chip thickness or feed per tooth, along with the number of teeth in the cutter, form the basis for determining the rate of feed.

Drywall screws direct into my waste board and any generic cam clamp with a screw as well into the waste board. Just make sure the don’t go through or it may lift the top layer up a bit.

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Spindle speedformula

I’ve been using t-track and clamps - made my own out of scrap plywood. Using extra clamps to set up fixtures if/when needed. Only time I use tape/CA-glue is when I need to face the entire top of the piece.

As can be seen from its position near the center of the group of materials, cermet offers a balance between hardness and toughness. Its properties place it in ...

I find so much of my time is spent just setting the material and getting it clamped one way or another to the waste board. I would love to do more high speed machining but I worry about the blue tape letting go.

When drilling and tapping, it is crucial to use oil. It keeps the bits from squealing, makes the cut smoother, cleans out the chips, and keeps the drill and stock from overheating.

I did get it, and the clamp looks awesome. My current waste board is all 1/4-20 threaded inserts and no T-track though. So I havent tried it yet.

The can clamps I use I screw directly to my waste board today so not an I issue. When I get my quick change waste board then it will be something to keep an eye on

Thanks BJ, are you using Ben Myers cams? I found them a little difficult to get the correct distance to actually cam over and stay?

But you could use smaller diameter holes and bolts to make whatever sized dogs you want. The wedges can be tapped in between the material and the bolt head. Or use solid rod of good diameter (3/8 is probably as small as could be reliably relied on to provide sufficient clamping power with wedges).

I use one in my pocket hole jig (replaced the threaded adjusting one it came with). It’s super easy to use and clamps tightly. Just push it into the material from the end and then push the clamp handle down. The black piece that goes against the material is pretty robust plastic(?) and won’t mar the material.

Cuttingspeed Chartfor milling

Pecking helps ensure that bits don’t overheat and break when using them to drill or tap. Peck drilling involves drilling partway through a part, then retracting it to remove chips, simultaneously allowing the piece to cool. Rotating the handle a full turn then back a half turn is common practice. Whenever the bit or tap is backed out, remove as many chips as possible and add oil to the surface between the drill or tap and the workpiece.

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Cuttingspeedformula

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@bhcraft did you end up getting the Armor Auto Inline clamp? if so how’s it going. I just got some clamps and the bolt sticks up wayyyy too high. I Definitely need t track stops or a low profile clamp.

Cuttingspeed chartfor turning

Has anyone tried the Armor Auto Inline T Track Clamp? https://armor-tool.com/product/auto-adjust-b7-il-in-line-t-track-clamp/

Tighter tolerances for flutes mean more accuracy and consistency in subsequent grinding operations, such as Clearance grinding, pointing and split pointing.

Once the SFM for a given material and tool is determined, the spindle can be calculated since this value is dependent on cutting speed and tool diameter.

What is a collet? A collet is a device used in a collet chuck to clamp on a cutting tool. What ...

I have a waste board system that has t track, 1/4-20 threaded inserts and 3/4” dia. Dog holes. My ? Is how do I use dog holes that are only the thickness of the waste board system in my case 3/4” thick.

Feeds for end mills used in vertical milling machines range from .001 to .002 in. feed per tooth for very small diameter cutters on steel work material to .010 in. feed per tooth for large cutters in aluminum workpieces. Since the cutting speed for mild steel is 90, the RPM for a 3/8” high-speed, two flute end mill is

I imagine I am not the only one who is tired of blue tape and CA glue or having to thread in hold downs that get in the way.

Drilling machines that have power feeds are designed to advance the drill a given amount for each revolution of the spindle. If we set the machine to feed at .006” the machine will feed .006” for every revolution of the spindle. This is expressed as (IPR) inches per revolution

Something else that is good for hold downs is a composite nailer. They use composite (plastic) nails. They work just like regular brads (they’re usually something like 15ga) but because they’re composite material, if the bit hits one it just cuts right through it without any damage to the bit.

Milling speeds and feedschartpdf

There’s also an adjustment where you can adjust the clamping pressure so I would expect it to hold project boards tightly on a CNC t-track setup. You’ll need to make sure to adjust your safe Z height so you don’t run a mill into the clamp handle.

Dog holes (3/4" dia is typical for woodworking dogs) allow you to use solid dogs in the holes and then a wedge between the dog and the workpiece. Just tap the wedge into place.

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What about a system of wedges? Start with an L-shaped frame/fence fastened at two of the edges of the waste board. Place the workpiece snugly into the corner of the frame, place a wooden peg on each of the two sides of the waste board across from the fence and next to the workpiece. Press a wedge between the workpiece and each of the wooden pegs. Not much pressure is needed. If the job goes wrong, the only thing the bit will hit is wood. This is kind of the idea, though his frames U-shaped:

The hardness of the cutting tool material will also have a great deal to do with the recommended cutting speed. The harder the drill, the faster the cutting speed. The softer the drill, the slower the recommended cutting speed (See Figure 2).

Jim I dug in a little deeper and found the dog hole version but my dog holes are only the depth of the thickness of my waste board and this continues to be problematic. Dave

Lathe cuttingspeed chartPDF

I have done several batch operations where I put in 2 fences (one on x and one on y) with 2 opposing cam clamps to get repeatable and quick mounting of blanks. Works great.

As the work advances into the cutter, each tooth of the cutter advances into the work an equal amount producing chips of equal thickness.

Jim, I looked at the clamp you referenced. Will this work when my t track is 3/8” below the surface of my waste board. You also spoke to using dog holes how are you doing that? Thank you so much

Cuttingspeed chart

@Hermsen.BJ I’ve looked at some cam clamps but I’m worried that the bolt sticking up is going to play havoc on the z slide and hit the bolt is it passes by. Have you had any issues with the length of the bolts ?

Climb milling has been recognized as the preferred way to approach a workpiece due to the fact that more and more machines compensate for backlash or have a ...

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Yep. The track bolt is adjustable in height. You can also use longer or shorter t-track bolts with it. But it does require a 3" safe Z height. Rockler also has a version of the same kind of clamp. Not sure how tall that one is.

Cutting speed is defined as the speed at the outside edge of the tool as it is cutting. This is also known as surface speed. Surface speed, surface footage, and surface area are all directly related. If two tools of different sizes are turning at the same revolutions per minute (RPM), the larger tool has a greater surface speed. Surface speed is measured in surface feet per minute (SFM). All cutting tools work on the surface footage principle. Cutting speeds depend primarily on the kind of material you are cutting and the kind of cutting tool you are using. The hardness of the work material has a great deal to do with the recommended cutting speed. The harder the work material, the slower the cutting speed. The softer the work material, the faster the recommended cutting speed (See Figure 1).

Has anyone used a vice setup? This is very common with regular steel machining so I’m curious why I do not see it with woodworking and router CNC?

On the milling machines we have here at LBCC, the feed is independent of the spindle speed. This is a good arrangement and it permits faster feeds for larger, slowly rotating cutters.

If you’re carving wood, I’d get 3/4" hardwood dowels and cut them to 1 1/2 or 1 3/4" length. Then you’ll have 3/4 or 1" extending over the waste board surface. The 3/4" depth of the hole should provide plenty of strength for the wedge holding. Those should work well even for 2" stock. And because they’re wood, if you hit one with a bit it shouldn’t be catastrophic.

Use a strong insert geometry, like a button (round) insert · Use a strong cutting edge – a T-land or K-land insert can better hold up to the stress of the hard ...

I made them I in 1/2" ply for cam and 1/4" for hold downs. Hold Doreen are rectangles of different length with a slot in them.

If you’re going to mill aluminum or something, the wooden dogs might work or you could either get short metal dogs or make your own with 3/4" round metal rod.

Tap guides are an integral part in making a usable and straight thread. When using the lathe or the mill, the tap is already straight and centered. When manually aligning a tap, be careful, as a 90° tap guide is much more accurate than the human eye.