[mactec54]

Thanks, I see that now. Alibaba quotes the spindle at 800Hz, Jainken quotes 400Hz and 400/800Hz.

I thought the VFD video predated the Jainken.

The 400/800Hz is the 4 Pole Spindle motor with a Base speed of 12,000 RPM and 24,000 RPM max

[Waynekofuco]

Ive had some dialog with Wafer at Jainken, he was who I dealt with w my first spindle, and Jainken now offers the 3.2KW in 400Hz or 800Hz. As I initially posted, the goal was to move from ISO20 to BT30 for larger tooling specifically for facing. On my 2.2Kw ISO20 spindle I got good cuts w small tools, but never felt comfortable using a tool larger than 3/8". I want to be able to use a shell face mill or some larger facing endmill to finish aluminum.

so now in the running is the
either the Jainken 3.2Kw 400Hz or 800Hz using https://www.ato.com/5hp-vfd-single-phase-input-output
or
either the CNCDepot FM30 400Hz or FM30F 800Hz using my WJ200

Again this is moving from a steel fixed garnty router that had a lot of headstock flex 2nd the AL spindle mounting plate to a full cast iron VMC.

Either Jainken option is considerably cheaper than the CNCDepot option as Wafer is giving me a deal as my 2nd spindle from them. I know the quality is great. But I don’t know if I actually need 3.2Kw.

Also as Ive read more about the differences of 2 pole vs 4 pole motors and all thing being equal the 4 pole is less efficient and noisier. Is a 2 pole motor capable of running a 50mm facemill at reasonable rpm for such a face mill?

[joeavaerage]

Hi,

Is a 2 pole motor capable of running a 50mm facemill at reasonable rpm for such a face mill?

I don't think ANY of these spindles will do a good job with a 2 inch face mill. These spindle have low torque but high speed whereas a face mill
requires high torque and low speed.

A 50mm diameter face mill cutting steel with carbide tips still requires a surface speed of 100m/min (give or take a margin for coatings/cutting style preference)

50mm x PI= 157mm/rev therefore:
RPM_100m/min= 100 / 0.157
=637 rpm

Do you think any of the spindles you are looking at, be they 2 pole or 4 pole, are going to survive spinning at less than 1000rpm and developing the power required to cut?

Craig

[Waynekofuco]

Hi,

Do you think any of the spindles you are looking at, be they 2 pole or 4 pole, are going to survive spinning at less than 1000rpm and developing the power required to cut?

Craig

I have no idea, that why I'm asking. I'm open to a belt driven spindle, but when I look at normal spindle surface speed of 600 f/m for AL for tooling 1/8"-3/8" cutters the recommended spindle RPM is 18000-6000. Most of the servo/belt driven spindles I see are limited to 6000rpm.

Im still trying to learn my way through all of this. My current understanding is that for AL, spindle rpm should be >10000rpm for best finishes. Using spindles capable of those rpms, what type of tool is used for facing? I'll keep reading \up on speeds and feeds for dummies...

[mactec54]

I have no idea, that why I'm asking. I'm open to a belt driven spindle, but when I look at normal spindle surface speed of 600 f/m for AL for tooling 1/8"-3/8" cutters the recommended spindle RPM is 18000-6000. Most of the servo/belt driven spindles I see are limited to 6000rpm.

Im still trying to learn my way through all of this. My current understanding is that for AL, spindle rpm should be >10000rpm for best finishes. Using spindles capable of those rpms, what type of tool is used for facing? I'll keep reading \up on speeds and feeds for dummies...

10,000 RPM is not need for good finishes the higher the spindle speed the faster the feed, so you get the job done quicker nothing more to it.
A high-speed Spindle has an advantage for small diameter milling cutters though.

If you have a spindle that can only do 3000 RPM Max, you can still get the same quality finish, just at a slower rate.

[mactec54]

Hi,


I don't think ANY of these spindles will do a good job with a 2 inch face mill. These spindle have low torque but high speed whereas a face mill
requires high torque and low speed.

A 50mm diameter face mill cutting steel with carbide tips still requires a surface speed of 100m/min (give or take a margin for coatings/cutting style preference)

50mm x PI= 157mm/rev therefore:
RPM_100m/min= 100 / 0.157
=637 rpm

Do you think any of the spindles you are looking at, be they 2 pole or 4 pole, are going to survive spinning at less than 1000rpm and developing the power required to cut?

Craig

That is a ridiculous RPM number you have posted, I run, and most machinists run 2" to 3" face milling cutters from 2,800 RPM to 4,000 RPM for aluminum machining.

These Amana Face Mills run from 8,000 RPM to 12,000 RPM which are suited for these spindles controlling cut depth is important, choosing the right Tooling is important too.

https://www.amanatool.com/products/i...-x-1-4-inch-sh

https://www.amanatool.com/rc-3400-cn...outer-bit.html

[Waynekofuco]

That is a ridiculous RPM number you have posted, I run, and most machinists run 2" to 3" face milling cutters from 2,800 RPM to 4,000 RPM for aluminum machining.

These Amana Face Mills run from 8,000 RPM to 12,000 RPM which are suited for these spindles controlling cut depth is important, choosing the right Tooling is important too.

https://www.amanatool.com/products/i...-x-1-4-inch-sh

https://www.amanatool.com/rc-3400-cn...outer-bit.html

Ah perfect thanks for the links. I looked at similar bits but the were wood only for the 12000. Thanks great find