I ordered genuine Tormach from Studica. It will be interesting to compare to the Amazon/Ali holders I have now.
The genuine Tormach TTS adapter and ER Collet holders arrived.
I have 3, R8 to TTS adapters:
- one of my generic adapters is really wonky to about 0.006" basically garbage.
+ Both the Lyndex and iCarbides are both under 0.001", the iCarbide is actually a touch better than the Tormach, all in measurement < 0.0003"
I have many ER16-20 collet holders, I only measured 10; both the Tormach and iCarbide are all under 0.001"
Some of the generic Ali type collet holders appear wonky when measuring or observing the ring, however the actual end mill is actually fairly true typically ~ 0.001"
So the summary is:
> for the most part the cheap Amazon/ Ali type stuff seems pretty good and is about 1/3 the cost of the genuine Tormach (if you can live with the wonky looking ATC rings)
> unless you measure you won't really know for sure, I did have one really wonky adapter.
> the cheap Ali collet holders do NOT have a chamfered stub.
> the iCarbide stuff seems pretty good and is more affordable.