They are only half way around the tube so maybe 1" or so long..evenly spaced apart about 1/16 of an inch..but they only appear in sections of the tube..I have removed all side guides and have taken out carbide tipped blades on the last 3 finishing heads and replaced with brass..it's hard to pin...
Anyone have any knowledge of center less grinding out there..having a issue with "grind lines" in finished parts..grinding on a 5 head Acme abrasive belt grinder. Grinding a carbon steel tube from a 7/8 dia to a 1 1/4 dia...alignment seems to be right..good run line on carbide tipped blades..no...
