pianoman8t8
Hot Rolled
- Joined
- Nov 14, 2012
- Location
- Maine, USA
Hi all,
I've run into a dilemma at work. I run a CNC cylindrical grinder, I grind OD's and ID's. Most ID's I grind are what we call "cones", they vary in size, but are about 10 degrees included angle for the most part with a profile tolerance of .0002" per side. We are currently required to use what they call a "smear gage" to test the form of the cone, and must have 75% contact on the gage to the ground standard. I feel this is fairly subjective to who's using it, how much dye is put on, and on top of ALL that, it does not give you a quantitative number for form, which they are apparently ok with... for now...
I'm raising a stink about it because although I have zero experience in scraping or using hi spot dye to check scraped surfaces, my impression from reading about the scraping process, is the high spot dye could likely not show up over .0002" profile tolerance per side. What are your thoughts on this? Thanks
I've run into a dilemma at work. I run a CNC cylindrical grinder, I grind OD's and ID's. Most ID's I grind are what we call "cones", they vary in size, but are about 10 degrees included angle for the most part with a profile tolerance of .0002" per side. We are currently required to use what they call a "smear gage" to test the form of the cone, and must have 75% contact on the gage to the ground standard. I feel this is fairly subjective to who's using it, how much dye is put on, and on top of ALL that, it does not give you a quantitative number for form, which they are apparently ok with... for now...
I'm raising a stink about it because although I have zero experience in scraping or using hi spot dye to check scraped surfaces, my impression from reading about the scraping process, is the high spot dye could likely not show up over .0002" profile tolerance per side. What are your thoughts on this? Thanks