Thanks. I’ve been using your recommendations so far and they are working, the only one that I missed was the Climb Milling. I’ll be giving that a shot.

Climb vs conventional millingaluminum

When you have manufacturers' data simply find your tool in the catalog and cross-reference the cutting speed and chip load against the tool diameter:

For turning applications, we do not need this formula since Spindle Speed is usually given in Constant Surface Speed (CSS), which uses SFM value directly. But if you still want to use the RPM formula, then the diameter value is the actual diameter of the workpiece.

Climb milling vs conventionalreddit

One of the primary tasks machinists must learn to perform is a calculation of speeds and feeds required for milling, drilling, and turning.

With a finishing allowance and a finishing pass, neither is a problem but I wish Estlcam could specify climb or conventional milling on a per-toolpath basis (or per-tool would be good enough). Then I don’t have to predict the amount of deflection to set the finishing allowance.

What isclimb milling

Calculate Speeds and Feeds for 1/2" (0.5 in) 2 flute end mill in Mild Steel at cutting speed = 100(ft/min), Chip Load=0.001(inch per tooth)

It starts with knowing what workpiece material you have and what tooling and how you will be using to machine it.The combination of these two factors determines your initial Cutting Speed and Chip Load that you can put into the speed and feed formulas to calculate the cutting tool RPM and feed rate.

Climb vs conventional millingsurface finish

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Climb millingis also known as

Since cutting speeds can be in either Imperial (SFM) or Metric (SMM or m/min) units, you have to use two formulas to calculate the RPM.

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Climb milling vs conventional millingreddit

The formula is used for milling and drilling applications. Please note that some tool manufacturers provide their recommended feed rate as feed per revolution. In such cases do not multiply by the number of teeth.

Honestly I do not see much difference with either of my machines. I feel we are relatively rigid, high power “spindles” and small bits. I feel I get the best cuts and faster speeds using my recommendations, but I assume each persons experience will vary.

Been searching for a little while but can’t come up with a good answer. In the Milling Basics Ryan says use Climb Milling but in ESTLCam it says Conventional is better for most hobbyist machines because the machine needs to be rigid to prevent backlash with Climb. So, which is best for the LR2? Or is it really build dependent and you need to test with your machine and the bits you use? Thanks all!

I’ve observed climb milling produces slightly oversized parts and oversized holes, which gets worse if the feedrates are high. And conventional milling produces slightly undersized parts and undersized holes.

What are Machining Speeds and Feeds One of the primary tasks machinists must learn to perform is a calculation of speeds and feeds required for milling, drilling, and turning. It starts with knowing what workpiece material you have and what tooling and how you will be using to machine it.The combination of these two factors determines your initial Cutting Speed and Chip Load that you can put into the speed and feed formulas to calculate the cutting tool RPM and feed rate. Cutting Speed is the speed at which the tip of the tool travels through the material. It is commonly expressed in Surface Feet per Minute (SFM) or Surface Meters per Minute (SMM).  Chip Load is the advancement of each tooth per revolution of the tool. In other words, Chip Load is the thickness of the material that each tooth removes per each revolution. So how do you find the Cutting Speed and Chip Load for your tool? Tool manufacturers often post Cutting Speeds and Feeds for their tools for various materials and cutting conditions. Most experienced machinists simply remember cutting speeds and chip loads for materials they machine most often. Here are commonly recommended cutting speeds and chip loads for carbide tools for a couple of materials: Aluminum: 300SFM, 0.7% of the diameter (for example fz = 0.5"dia x 0.007 = 0.0035in/tooth) Annealed Tool steel: 150SFM, 0.4% of the diameter (for example fz = 0.5" x 0.004 = 0.002in/tooth) When you have manufacturers' data simply find your tool in the catalog and cross-reference the cutting speed and chip load against the tool diameter: Since cutting speeds can be in either Imperial (SFM) or Metric (SMM or m/min) units, you have to use two formulas to calculate the RPM. Imperial Speed and Feed Calculation Code RPM= 12 x SFM = Please enter Speed and Diameter 3.14 x in Feed Rate = RPM x x in = Please enter RPM, number of teeth, and chip load (in/min) Metric Speed and Feed Calculation Code RPM= 1000 x m/min = Please enter Speed and Diameter 3.14 x mm Feed Rate = RPM x x mm = Please enter RPM, number of teeth and chip load (mm/min)

Cutting Speed is the speed at which the tip of the tool travels through the material. It is commonly expressed in Surface Feet per Minute (SFM) or Surface Meters per Minute (SMM).