End Mill vs Straight Bit

[timothykeenan]

1. Is there any advantage to using an end mill rather than a standard router straight bit?

2. Does a larger spindle motor produce more torque, or just more rpm's?

thanks

[jimandi5000]

1. Is there any advantage to using an end mill rather than a standard router straight bit?

2. Does a larger spindle motor produce more torque, or just more rpm's?

thanks

Straight bits will give you a better finish on MDF becauseof it has no grain.
Spidal mill bits can provide down pressure to provide a cleaner finish.

No one bit fits every job.

Sorry, Spidals can be ordered to spec... we would need details on what you have to what you are looking to order.

[Rcnewcomb]

Is there any advantage to using an end mill rather than a standard router straight bit?

See this thread: The basics of bits and spindle speeds

Does a larger spindle motor produce more torque, or just more rpm's?

More torque to cut faster and/or deeper. The RPMs may even be lower than a smaller spindle or router.
Spindles are able to keep their torque even at slower RPMs whereas routers tend to lose torque at slower RPMs.

[scottp55]

Timothy,
Welcome to the Forum and very helpful people.

Please don't take this the wrong way, but is this the "spindle" you're talking about?
https://www.sainsmart.com/products/genm ... 018-series
People need to be aware of this before bit and cutting strategies could be knowledgeably recommended.

NOT putting down Anything that gets you into this great field, and really depends on what you'd be cutting.
But fixed(?) 20K RPM will be possibly limiting.
IF you haven't bought yet, Maybe ask opinions and alternatives??

A very common saying in CNC is "Buy your second machine First!"
Maybe someone with more personal experience will chime in, as it's out of my ballpark knowledge.

A VERY helpful forum,
discounting this uncaffeinated guy who's only ever had 1 machine, but has many opinions!
scott

[martin54]

How long is a piece of string ?

No where near enough detail to answer either question really as there are so many different factors at play, the job you are doing, material you are cutting all may suit one type of bit or spindle over another

both types of bit have advantages & disadvantages & as jimandi5000 has said, there is no one type of bit for every job.
I have both straight & spiral flute bits & use both, which I choose depends on the type of toolpath & the material I am cutting,

This is a bit more difficult to explain as there are again many factors that come into play but one of the most important when cutting is chip load, this is the amount of material removed by each flute (cutting edge) per revolution of the bit. To get the correct chip load you have to ballance the spindle speed & the speed the machine moves at (feed rate)
There are also many different types of spindle motor & it's important to make sure the spindle motor is right for the work you are going to be doing, every spindle will have a torque curve which falls between a certain speed range.
To give you an example I have a CNC router & a CNC mill, the router is fitted with a high speed spindle with a max speed of 24,000rpm. The mill is fitted with a low speed spindle which has a max speed of about 4,000 rpm.
Both machines have different applications.

[Leo]

1. Is there any advantage to using an end mill rather than a standard router straight bit?

2. Does a larger spindle motor produce more torque, or just more rpm's?

thanks

If you are looking at the Genmitsu router website, it would be very helpful to us to help you decide if you could be more specific about what you are asking.

You have only 2 questions, which is good, but, there are possibly hundreds of different answers on each question. Any answers you are getting are no better than "guesses".

1) - the answer could be YES - or NO, depending on what you want to do.

2) - the answer could be in many different forms depending on the spindle you want to talk about. Maybe a larger spindle can hold a larger tool (ER20) vs (ER11). But then that may not matter is you have a really small machine.

[adze_cnc]

1. Is there any advantage to using an end mill rather than a standard router straight bit?

By "end mill" do you mean one of those three or four flute high helix angle mills (see: https://toolmonger.com/2009/08/12/high-helix-end-mills/) commonly used in metal milling machines or a spiral router bit commonly used in wood/plastic applications (see: https://cncrouterstore.ca/products/onsr ... 8695678083)?