Shrink fit holders and extensions often come with a big through hole.

Its primary use is to allow the shank be knoked out from he back should the tool ever snap off. It is also used to supply coolant for CTS machines.

Unfortunately said hole affects rigidity of the holder making it more likely to chatter leaving bad surface finish and badly affecting tool life.

There is however an old trick to prevent or minimize the chatter.

All you have to do is pack that hole with some thick grease.

Don't forget to cap off the oppening so that grease does not escape when the tool is spinning.

Here are several photos of surface finish before and after grease application. All cutting parameters were exactly the same in both cases.

before. deep chatter marks after. surface finish is ideal tool in extension holder showing capped hole

Hello gentlemen,

On September the 1st HSMAdvisor will turn one year old.

At that point 75$ for life deal will stop being offered.

Prices will go up.
New payment plans will be introduced.

Considered packages are:

• Current Release Single Seat License (1 key): xxx$
• Current Release Five Seat license (5 keys): xxx$ (30% savings)
• Current Release Company-Wide License (Unlimited seats within company premises): xxx$

Program Upgrades (Upgrading from version 1.xx to version 2.0):

• Single Seat License Upgrade: xx$
• Five Seat license Upgrade: xxx$
• Company-Wide License Upgrade: xxx$

I am not exactly set on pricing right now, so i can not say just how much things will cost.
I can only promise that pricing will continue being more than reasonable and very competitive.

Until September i will release several updates, but I will no longer offer trial extensions after September the 1st.

Announced changes will only affect commercial HSMAdvisor.

Free Online FSWizard will remain free for everyone.

I recently had to machine an aluminum mold cavity.

7 inches deep. With 5 degree wall draft and a 60 thou radius going all the way down. Roughing was not an issue, but for semi-finishing and finishing i had to manufacture these two extension holders.

Both tools have runout of less than 0.001

The one for bigger 3/8 tapered ballnose cutter is shrink fit- i mounted it using torch.

The smaller tool is a 3/32 tapered ballnose cutter from Harvey Tool.
I could not bore to correct size, and had to ream right on.
The tool is mounted with a set-screw from both sides to prevent deflection caused by unequal clamping pressure.

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