I’ve seen a few good videos (Mitz on speeding up via Max Jerk rates, which was good) and also the Cyber Reef Guru on bits.

Mar 4, 2024 — The ideal scenario involves the carbide drill's tip making the first contact with the material. Therefore, a Spot Drill should possess a point ...

If you made a video on the construction of that, or say, hypothetically, building one for your new biggest fan, you’d get 500k subscribers, pronto!

This article has been created in collaboration with Machining Doctor and Seco Tools. Cutting tool suppliers provide recommendations for cutting speed, but these are broad and intended for perfect conditions. These recommendations are too high in many cases, and we need to adjust them for our specific application. We can use speeds and feeds calculators or the Seco Assistant. However, understanding the parameters influencing calculations will enable better decision-making, longer tool life, and higher productivity. Identify your material correctlySupplier catalogs list multiple subgroups within each material group. Although this may be confusing, it is not the place to take shortcuts! Invest adequate time in classifying your material before proceeding to the next step. Discover the material groups in details Hardness Matters In many cases, you may have personal knowledge or catalog recommendations for the cutting speed of a material in its annealed state, but it may require heat treatment before machining.PH stainless steels or high alloy steels are common examples of this scenario. Raw material hardness affects cutting speed adjustment.To fine-tune the speed, refer to the chart that displays the hardness difference between the material you're working on and the material for which you have the original data. The Y-axis shows the percentage of adjustment needed for the cutting speed.  Stability The overall stability of the setup largely determines the appropriate speed for a machining application, which is a personal assessment.It depends on the quality of both the workpiece and the cutting tool's clamping, as well as the overhang of the tool.To assess stability, rate it on a scale of 0 to 10, where 10 represents a perfectly stable setup with a short tool overhang, and 0 represents a poor setup. Adjust the speed according to the factors from the chart provided (assuming that the catalog recommendation refers to a score of 8). Tool life or productivity?The range of cutting speeds that can be used is quite wide, and there are no definitive rules regarding the best option. Choosing a higher cutting speed will boost productivity but will result in a shorter lifespan for the tool. Conversely, selecting a lower cutting speed will lengthen the lifespan of the tool but will decrease productivity. The best decision will depend on your objectives and personal preferences. Stepp-Over in Milling (Ae)In milling operations, the radial depth of cut (Setp over) is another factor to consider. As the radial depth gets lower, the cutting speed can be increased. We can increase the speed since a smaller radial depth allows more time for each tooth to cool outside the material. The amount we can increase depends on the cutter's diameter and the ratio between it and the radial depth (Ae/d). You should assume that the starting point recommendation is for Ae/d=0.5 and use the table below to get the speed adjustment factor.   It is important to remember that the information presented here is not purely scientific. Nonetheless, it can be a useful guide for adjusting cutting speeds based on application conditions.   Erez Speiser is the founder and developer of the Machining Doctor Website. The platform encompasses his 30 years of experience in the machining industry, during which he held managerial positions in Engineering, Production, and Marketing. Combining his extensive knowledge of the industry and web development skills, Erez founded the Machining Doctor - a platform that serves as a hub for industry professionals to access his wealth of expertise and insights. Contact him on LinkedIn.     Inline Content - SurveyCurrent code - 5fce8e61489f3034e74adc64

Nice! The prices aren’t bad, either and, for those looking to scrutinize whether these are legitimately US-made tools, here’s the confirmation.

Their website is a little confusing to navigate. There is a page for woodworking-specific bits where they have a selection of up, down, compression, and V bits in several sizes. However, the bits I use aren’t on that page and can be found here . Five bits for $34.75 or less than $7 each. I’ve found them comparable to the whiteside bits but would be interested in hearing what others think.

For a super anal-retentive approach I might do a single pass using a 1/4" downcut to make the cleanest surface cut & then switch to the upcut for the rest of the passes.

I discovered CarbideToolsSource a few months ago and have been using the 1/4" upcut bits with good success. They make their bits in their own shop in Oregon and shipping is free and quick. They’re in Southern Oregon and I’m in Portland and have received the bits the next day.

Supplier catalogs list multiple subgroups within each material group. Although this may be confusing, it is not the place to take shortcuts! Invest adequate time in classifying your material before proceeding to the next step.

Cutting speed chart fordifferent materials

Here’s my question. It seems like down bits are the clear winner for cleanest cut…and up down bits as well. But with the up down or compression bit, it seems like you have to get the whole bit in there for it to work as advertised.

The range of cutting speeds that can be used is quite wide, and there are no definitive rules regarding the best option. Choosing a higher cutting speed will boost productivity but will result in a shorter lifespan for the tool. Conversely, selecting a lower cutting speed will lengthen the lifespan of the tool but will decrease productivity. The best decision will depend on your objectives and personal preferences.

I’m new to CNC and overwhelmed, make that OVERWHELMED by everything related to bits. Also feed, plunge, hell, all the dress neckline rates. Sorry, Dad CNC joke.

To fine-tune the speed, refer to the chart that displays the hardness difference between the material you're working on and the material for which you have the original data. The Y-axis shows the percentage of adjustment needed for the cutting speed.

Millingspeeds and feedschartpdf

That seems really aggressive to me. I need to cut either 1/2 plywood for templates, or my dream would be to cut 1" mahogony for final.

Lathecutting speed chartPDF

Compression bits are good for composites like plywood or melamine, they don’t offer a lot of benefit for solid hardwoods.

I am using Easel software and I am inputting all my bit info, and they are asking for: upcut, downcut, straight, v-cut options. So you have to select which option for each bit. While 90% of my bits are clearly marked as either upcut or downcut. I am unsure on some as they are not listed anywhere I could find.

Carbide end Mill RPMchart

Not sure where the best place to post this is, but I wanted to let everyone know about a source for bits that I’ve been using and have been very happy with.

Depends on the material. I usually use 1/4" as my go-to. A qtr inch has less deflection potential than the 1/8" bit. For 1/8" bits you can use either 1/4" shanked bits that are tapered down to 1/8" or straight 1/8" bits with a 1/8" shaft - you’ll just need a 1/8" collet. You can get good ones from Elaire. A 1/8" bit typically has a longer cut depth than a 1/8" tapered from a 1/4" shaft. You probably want to get a 1/8" collet so that you can get smaller bits like 1/16 or 1/32 which are good for 3D projects.

James J. Povinelli is the primary contact at Connecticut Saw & Tool, LLC. Connecticut Saw & Tool, LLC generates approximately USD 500000 in revenue annually ...

I have no idea what diameter I should be using. My first efforts have been using 1/8th" upcut bits from Amana, but it’s only good for 1/2" depth.

In many cases, you may have personal knowledge or catalog recommendations for the cutting speed of a material in its annealed state, but it may require heat treatment before machining.

Cutting tool suppliers provide recommendations for cutting speed, but these are broad and intended for perfect conditions. These recommendations are too high in many cases, and we need to adjust them for our specific application. We can use speeds and feeds calculators or the Seco Assistant. However, understanding the parameters influencing calculations will enable better decision-making, longer tool life, and higher productivity.

Guliz Altın İn modelleri en ucuz fiyat seçenekleriyle Cimri.com'da! Guliz Altın İn modellerinin ürün ve yorumlarını karşılaştır, en uygun fiyatını kaçırma.

Erez Speiser is the founder and developer of the Machining Doctor Website. The platform encompasses his 30 years of experience in the machining industry, during which he held managerial positions in Engineering, Production, and Marketing. Combining his extensive knowledge of the industry and web development skills, Erez founded the Machining Doctor - a platform that serves as a hub for industry professionals to access his wealth of expertise and insights. Contact him on LinkedIn.

To assess stability, rate it on a scale of 0 to 10, where 10 represents a perfectly stable setup with a short tool overhang, and 0 represents a poor setup. Adjust the speed according to the factors from the chart provided (assuming that the catalog recommendation refers to a score of 8).

Nope. You may find a speed advantage to using a template but that’s typically because we tend to overdrive the pass depths when we’re routing by hand. Also, consider that when the CNC is cutting the final piece, it’s essentially a robot assistant and you can do something else. I tend not to make templates unless I need depth that I can’t get with the CNC and I’ll use the bandsaw to do the pattern cut followed up with lots of sanding, etc.

The other but I use a lot is a chip-breaker. Instead of smooth cutting flutes the length of the cutting length, the flutes have horizontal cuts in them to really aggressively cut through and eject chips. But that usually requires a bit more edge sanding afterwards.

The only thing I might add to Jim’s post is that feeds and speeds are not absolutes. I try to look for chip load (saw dust bad, chips good) and adjust feeds/speeds/plunges from there.

The overall stability of the setup largely determines the appropriate speed for a machining application, which is a personal assessment.

May 31, 2023 — Drill Size Conversion Chart ; 1/8. 0.125. 3.175 ; 30. 0.129. 3.264 ; 29. 0.136. 3.454 ; 28. 0.141. 3.569.

price 530. You won't overpay for Lay-In Mount Return Air Grille, 23.75 X 23.75, White, Steel and 24 in x 24 in Filtered Return Air Grille, 45 Degree Louvered, ...

I recently cut 3/4" MDF to make internal ribs for a large curved TV lift cabinet. (used bendy plywood so there are no angles on the body) All of the nested cuts couldn’t have taken more than 20mins to cut. I don’t know if that description is clear enough to give you an idea as to how playing with tool settings can really speed the process up though. Suffice it to say that I didn’t adhere to prescribed tool settings.

Carbide end mill speeds and feeds calculator

Okay, that is nuts. Which is to say, amazing. Holy shit, Phil. My brain can’t even process half of the steps to build that. Hard to see, but did you inlay the veneer in a geometric pattern using cnc to carve? On a convex and concave curve?

These links are both to the same video, but I have selected specific times which show slow motion what is happening in each case.

I would like to piggy back on this thread a bit to ask a few newbie questions on downcut/upcut when it pertains to specialty bits like keyhole, roundover, and spoilboard surfacing bits.

by D Che · 2014 · Cited by 372 — In this paper, a comprehensive literature review on machining of CFRPs is given with a focus on five main issues including conventional and unconventional ...

Millingspeeds and FeedschartMetric

Our free speed and feed calculator can be used to determine the spindle speed (RPM) and feed rate (IPM) for the specified cutting conditions, as well as the ...

Driving a screw into a plastic wall anchor shouldn't take much force at all. Make sure the head is sized probably for the screw.

End Mill RPM calculator

It is finished in rosewood veneer while the top is curly sapele mahogany. (it took two days to cut and apply the veneer pieces…many had to be edge finished with a shooting board) 20220109_0832351219×971 216 KB

Jun 29, 2011 — If the driver is going to be front mounted and not recessed, I would use at least 1" #8 screws with a 3/32" drill bit for the pilot holes and ...

It’s it nuts to rout final cuts in mahogany, vs. just cutting plywood templates? This whole CNC experiment started becuase I wasn’t excited at the mediocre quality of my Rockler pattern bit, 1/2" diameter, which tears the hell out of everything, unless I trim the wood to about 1/32nd proud of what I need, which is pretty damn hard with a bandsaw.

for 1" mahogany (my final material, on this modern Adirondack project), you would use 1/4" compression bits? Or 1/4" upcut bit?

In milling operations, the radial depth of cut (Setp over) is another factor to consider. As the radial depth gets lower, the cutting speed can be increased. We can increase the speed since a smaller radial depth allows more time for each tooth to cool outside the material. The amount we can increase depends on the cutter's diameter and the ratio between it and the radial depth (Ae/d). You should assume that the starting point recommendation is for Ae/d=0.5 and use the table below to get the speed adjustment factor.

A compression bit has a small portion that is an upcut geometry (usually no more than 1/4 - 1/3 of the overall length). To get the clean cut through on the bottom you don’t need to go full bit depth, just the bottom portion needs to go through the lower surface. These bits are good for plywood & melamine so the surfaces are good but the downcut problems of packing chips into the hole or cut channel remain. Also, you want to ramp these into the material so the upcut portion gets below the top surface.

To recap: for 1" mahogany (my final material, on this modern Adirondack project), you would use 1/4" compression bits? Or 1/4" upcut bit?

Finally, while I have learned more about the various types of spiral bits, I have no idea what diameter I should be using. My first efforts have been using 1/8th" upcut bits from Amana, but it’s only good for 1/2" depth.

@Matticustard Gotcha - that makes sense. I kinda figured that to be the case, but didn’t want to assume anything as I am just starting out my CNC journey. Thanks for the help!

Ha ha. Nah, though the build was 100% from scratch, the veneer was probably the hardest part being hand cut and applied. It didn’t like being applied to curved surface at all and took about 48sq ft. in total.

Their bits work awesome. I have been using them since I bought my Onefinity 2 years ago. I have used sizes 1/32nd up to 1/4 inch. I have used both the upcut and the downcut. Ordering is easy and turn around is fast. I have never had a problem with their bits.

I haven’t cut 1" mahogany yet but have 1-1/4" walnut and sepele (sp?) with a 1/4 upcut and not experienced any trouble. Cut direction might be a concern due to mahogany’s fine grain though.

13831 is a prime number. 13831 has 2 divisors, whose sum is σ = 13832. Its totient is φ = 13830. The previous prime is 13829. The next prime is

End Mill speeds and feeds calculator

It seems like down bits are the clear winner for cleanest cut…and up down bits as well. But with the up down or compression bit, it seems like you have to get the whole bit in there for it to work as advertised.

Not exactly. The downcut will make a smoother cut on the top surface but a rougher cut (tearout) on the bottom surface of your material. Downcut bits have a problem ejecting chips so they’re only good for shallow cuts - it’s possible to pack the chips in a cut channel to the point they catch on fire. At the very least they tend to trap heat which is bad for the bit.

It is important to remember that the information presented here is not purely scientific. Nonetheless, it can be a useful guide for adjusting cutting speeds based on application conditions.