Maritool Cat40 Collet Tool Holders - TIR is too high

[poorboy]

Hi,

My machine is a Haas TM0P. Its measured TIR at the spindle is less than than .0001". I usually purchase my cat40 tool holders from Haas and the TIR using these holders is generally less than .0002" (it is quite good).

I heard so many good things about Maritool - so I decided to purchases a couple of Maritool's Cat40 Collet Tool Holders (please note that they are almost 2x the price of the Haas tool holders).

From Maritool, I purchased: a CAT40 ER32 1.85 COLLET CHUCK TOOL HOLDER (CAT40-ER32-1.85) and a CAT40 ER25 1.85 COLLET CHUCK TOOL HOLDER (CAT40-ER25-1.85).

The TIR of the ER25 tool holder was around .0005" and the TIR of the ER32 tool holder was .0003" (the ER32 TIR's wasn't that bad) -- but they were both worse than Haas. So what is the point here: if you are going to buy tool holders save some money and buy from Haas - generally the quality is very good.

Anyway just trying to save some people some money.

 

[markba633csi]

Interesting- well, I'm certainly not going to runout and buy those Ha Ha
(it's late)

 

[Ischgl99]

Maritool’s website lists the concentricity of less than 0.0001”, what did Frank say when you called him to report the toolholders are out of spec?

 

[poorboy]

Maritool’s website lists the concentricity of less than 0.0001”, what did Frank say when you called him to report the toolholders are out of spec?

I am exchanging emails with him now. He asked me to check the torque that I am using on the retention knobs - I will do that tomorrow (I just ordered a craw foot adapter to fit the retention knobs) and re-run the tests; however I do not expect that this will impact the TIR measurements (but if it does I will post the new results).

 

[poorboy]

This is the reply from Frank -

===================

In the past 20 years of grinding tool holders, every time there is a TIR issue it is with HAAS machines. I think it is a combination of low drawbar force and people using retention knobs without pilot diameters.

5/8-11 is a very coarse thread and does not center itself very well.

If a series of holders are ground to a low end angle while other manufacturers grind to a slightly higher angle and the spindle does not create enough elastic deformation due to low drawbar force you can get a poor fit with the later series of tool holders.

If you wish I can ups some of our knobs to try out or you can send the holders back for refund. Thank you.

===================

Frank is sending me two of his knobs to test out to see if I can reduce the TIR on the received tool holders. In any case, he was very responsive and I hope that the TIR can be reduced so that I can use his products. Its nice to see someone stand behind their products.

 

[Ischgl99]

I’m glad to hear he is taking care of you, I have only heard positive things about him over the years. After reading his comments, I do recall seeing on PM over the years guys with Haas machines having problems with some toolholders. Hopefully the retention knobs solves your problem.