- Thread starter fizzy
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Chinese quality slipping more than likely… can’t imagine the international standards have changed between old and new? Unless modern dogs are smaller.
I’d throw a file over the slots just to check it’s not particularly hard. You don’t want a cutter bouncing off! Should be easy to sort but you shouldn’t need to.
I’d throw a file over the slots just to check it’s not particularly hard. You don’t want a cutter bouncing off! Should be easy to sort but you shouldn’t need to.
Agroshield
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Most of RDG's stuff is sourced from India.
Drive dog on spindle should be 15.9 (b1 dimension): http://www.manufacturinget.org/home/4472-computer-aided-design/lab-assignments/spindle-nose-taper/
Slot in tool should be 16.1 (d6 dimension): https://www.kemmler-shop.de/en/din-69871-iso-7388-1/technical-information/
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Does the 14mm diameter tapping drill hole go deep enough? Maybe that is what is stopping the tap itself advancing.
Is the thread too short or your drawbar too long? Normally, 1 x D thread engagement is ample (think of how thick a standard M16 nut is - if that develops full strength, any extra length of engagement is unnecessary).
Hopefuldave
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I'd be sending that back, or at least firing off a snotmail to them? It should be pretty much through-tapped for the drawbar
Agroshield
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From the fat end of the taper, the bottom of the thread should be L1 - L3. Dimensions from here:
ISO40 FMH40 WITH PCD CLAMPING 035 AD Face Mill Holder
Item Name ISO D L1 L2 D2 ISO40 FMH40 WITH PCD CLAMPING 035 AD Face Mill Holder 40 40 35 27 70 ISO 2080 Standard (Type 1) Pull End Groove
www.toolsengg.com
I recently purchased a INT30 drill chuck arbor from RDG. My mill had an M12 drawbar that wouldn't engage in the arbor and for a while, I assumed that one or other was on fact a similar imperial thread. Only after running an M12 tap down the arbor did the drawbar engage. It didn't take much off but certainly enough to show the threads had not been cut properly. I find it harder and harder to source anything of quality these days, but that's down to manufacturing to a cost. I'm as guilty as the next man for wanting the lowest price, but with that comes the inevitable low QC and the need for fetteling.
Agroshield
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Just in case you do not know of them, Gloster Tooling has a reasonable range of 30 & 40 taper stuff.
Another option is CTC Tools out of Hong Kong.
Hopefuldave
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I got a bucketload of ER40 off EvilBay - always worth a look!
Slot in tool is only 15.85
Hole goes all the way through. 14mm drill bit fits nicely. I think it's just too hard. At least they got that right!
Barking Mat
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I bought a R8 collet off eBay or Amazon, can't remember which, thread didn't fit, complained, didn't accept returns, bummer.
Interesting to know. We’ve all seen the way they manufacture things. Lots of ingenuity but not to any standards when they’re melting any old scrap and machining items using cardboard templates.
Chinese labours gone up a lot in recent years so they must be cheaper…
Not all Indian companies like that. In fact most of the YouTube ones are in Pakistan.
You get what you pay for, regardless of where it's made.
It may pain some people to know, but India and China can and do produce high quality parts.
It's just most people prefer to buy the cheap stuff.
Kram
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I guess that explains it, had a few off things from them.
India does not like to do anything on a large scale, it is all made by a guy sitting in the dirt with a hammer and chisel. Bloody good but doesnt suit tight QC.
China is the opposite, everything on a massive scale by the billion. Every obscure item ever made, theres a giant warehouse full of it.
Had a look but cant see any on amazon.
Sadly not any more. I could have got the same chuck half the price from some Chinese suppliers.
Some suppliers put on small markups. Others far more.
Axminster are a classic example. They sell identical Chinese lathes and milling machines for as much as double other suppliers.
I don't mind paying extra for quality but I do object to high markups wirh no benefits.
At least RDG are very reputable and I am expecting no hassle to exchange.
I'll just leave this here - https://phoenixtoolings.com/index.html
I know two UK companies who buy from them under their own brands, and they produce far more than what's listed on their website.
I'd also guess there are lots of other companies around the world buying from them.
I've got 20 custom toolholders from them that came from them via a UK dealer.
They don't deal direct, as I emailed them direct, and they forwarded my email to the UK dealer, who arranged everything.
However, I highly suspect RDG will not be buying from them.
RDG is well down my list of preferred suppliers, as I've found their quality rather questionable.
