Thread: Coventry Quick Change Tooling
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17-06-2021 #11
I have fit a few ATC spindles with BT30 and ISO30 tapers and find they are the same or very similar price to 40 taper holders, but If I had a choice I'd go with 40 taper everytime.
On a Side note, the people I use for planning my large frames have a new machining centre with HSK100 and the size of the 100 Taper is huge.! I could fit my fist in the spindle nose..-use common sense, if you lack it, there is no software to help that.
Email: [email protected]
Web site: www.jazzcnc.co.uk
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17-06-2021 #12
My preference for anything home based, would be BT30.
However, due to the strong anti-change US scene, there are a lot of options for R8 if you want to make tool changes easier.
The Coventry system is good, but I wouldn't use it on any kind of high speed or high HP spindle. The biggest machine I'd say it's good for is something Bridgeport sized, which is the original market it was aimed at. It's just that the educational CNC machine suppliers realised it was a good option to get consistent tool changes, without requiring a full blown ATC.
BT30 tooling is cheaper than BT40.
ISO30 isn't that popular, and why it's generally more expensive. But if you want to save money, BT30 will fit with a slightly longer drawbar (I had various BT/ISO 30 holders for the Harrison mill I've just sold, and they all worked fine with a longer drawbar. The ISO ones just had a bit more thread engagement)
If you've not seen them, APT have spindle tooling at reasonable prices - https://www.shop-apt.co.uk/cnc-spindle-tooling.htmlAvoiding the rubbish customer service from AluminiumWarehouse since July '13.
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30-06-2021 #13
Any love here for R8 with TTS holders?
Alan
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01-07-2021 #14
Why Tormach didn't have the sense to go with BT30 is beyond me, but then they think dovetail slides and gib strips are a good idea for a modern commercially sold CNC too, the only possible conclusion is maximising profit at user expense.
You think that's too expensive? You're not a Model Engineer are you? :D
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01-07-2021 #15
Yeah, profit, lock-in, 'setting a new standard', and easy-ish conversion of all those old R8 millls...
But ... the Chinese TTS holder copies are fairly cheap.
Alan
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