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I'm getting different opinions regarding the use of ETP Hydro Grip Tool holders. I cut 3/4 prefinished maple plywood primarily and was advised to use the ETP Hydro-Grip Compact tool holder with my Weeke Vantage nested based router for cutting the parts out for cabinets. Another salesman I spoke with didn't think the expense was worth it. What are your thoughts about these tool holders?
If youre not cutting non ferrous or plastics its not worth the money. Wood isnt that accurate. Hydros and shrink fits are for more exact machining. No need in woodworking. Decreasing runout will give you better tool life but in 25 years ive never had an issue with the old 3pc setup.
I'll say the opposite.
Tool life is *definitely* improved, especially with smaller bits. It does drop off as the tools get larger.
There are many actual studies on this, even for wood.
The cost of a regular collet holder is about 50 bucks, and the cost of a hydro holder is about 350 (I think i paid 380 for the last one).
So you don't need to save very many bits to make up the difference, and you can save them *over the entire lifetime of the tool holder*.
You will in most cases, make that difference up.
Are you going to save 50% of your tooling cost?
But you'll save a few percent.
Given they are simply easier to use and get right than collet systems (most collets are not torqued properly), i don't know why you wouldn't do it.
I can lock and unlock bits with my cordless screwdriver at high speed instead of screwing around with collet wrenches.