H-M Supporter - Diamond Member
H-M Lifetime Diamond Member
- Jul 2, 2014
Based on this tread, I decided to purchase some CDCO QCTP Holders, to use with my Phase II QCTP. I purchased 4 ea of the 250-102 and 1 ea 250-101.
Here are some of my observations:
1) CDCO Holders though covered in oil, arrived with surface rust on the Set Screws, requiring cleaning to have them screw in and out smoothly.
2) The finish of the Phase II holders is cleaner/nicer. The CDCO holders have dings and marks on all the surfaces, while the Phase II holders are ding and mark free.
3) The Dimensions, Holder to Holder, are more consistent with the Phase II holders. All the dimensions are with in 0.001" of each other, Holder to Holder. On the CDCO holders the same measurements holder to holder varied by as much as 0.010".
Though, the difference shouldn't effect the performance of the holders, I think is speaks to Manufacturing Controls.
4) Of more importance.... I found on 2 of the 5 holders the bottom surface, where the tool rests (Opposite the set screws) was not square with the bottom of the Holder. I don't have access to a surface plate, so I can measure squareness that way, but I put a square along the back and bottom of the holder, and found it to be square. Measure from the bottom of the holder to the bottom tool surface, I found about 0.0015" difference front to back. Again this shouldn't effect things, but if it were greater, it could start to alter the angles of one's cutters.
5) The Dove Tail and back surface of the Phase II holder were ground after the black oxide coating was applied. On the CDCO the dove tail was ground before the Black Oxide was applied. (snip)
Again, the Chinese manufacturers do not seem to care a lot about long term quality control and quality assurance. A company might be making beautiful stuff, and as soon as you brag on them, the next ones are poor. And vice versa. That is why I ignore sellers touting high quality Chinese tools. I never know what I am going to get, so I choose the cheapest, and that approach does not seem to get me worse tools than buying the so called "premium" Chinese tools. It would be nice if the quality actually delivered on those tools long term was a whole lot more predictable, even if it cost more.