Negative rake carbide cutters

[mkemmet]

Although I've spent a fair amount of time turning with carbide cutters, I have not used a negative rake carbide cutter such as Easy Wood Tools Ci-R2 negative rake square cutter. What is the advantage of a negative rake cutter against a normal, flat-topped carbide cutter? Any and all comments about your experience with a negative rake cutter would be greatly appreciated.

 

[RobS]

FOLLOWING

 

[robersonjr]

I started using them on plastic blanks a few months ago, since then I haven't had a single blank catch or shatter. I only use them on the blanks I know I had problems with in the past. I have no complaints, for me it was worth the investment.

 

[acmaclaren]

I love my negative rake carbide cutters. I don't get any chips flying at me like shrapnel anymore. I too don't get any catches or blanks shattering. It's really worth getting them.

 

[neubee]

I used to dread turning acrylic material, switching to a negative rake cutter made the turning much easier.

 

[More4dan]

For much less $$ and the ability to sharpen, I made and use this.


As turned no sanding.

I mounted a standard cutter with a 20 degree negative rake ground into the holder made of 1/2" square bar.

Sent from my iPad using Penturners.org mobile app

 

[rsieracki]

For much less $$ and the ability to sharpen, I made and use this.


As turned no sanding.

I mounted a standard cutter with a 20 degree negative rake ground into the holder made of 1/2" square bar.

Sent from my iPad using Penturners.org mobile app

i really like this idea as lately i've been turning acrylics on my metal lathe as much as possible getting them as thin and as flat as possible.

 

[More4dan]

i really like this idea as lately i've been turning acrylics on my metal lathe as much as possible getting them as thin and as flat as possible.

I turn most of mine on my metal lathe to about 0.100" larger than the bushings. I then hand turn the curved taper to the final dimensions at the ends of the blanks. My next mini project is to build a holder for the normal carbide wood turning insert to use on my metal lathe QCP.

Danny


Sent from my iPhone using Penturners.org mobile app

 

[rsieracki]

ive been doing thin/straight sided pens like executives and zens.. i turn .005-.010 above bushings. then wet sand/micromesh and buff and they are perfect... turned some inlace acrylester from square down to round on my metal lathe and had NONE of the typical chipping either