JHOLLAND1
Titanium
- Joined
- Oct 8, 2005
- Location
- western washington state
so--topic of this thread is drilling 7/16 inch bore thru 35 inch long Moore jig borer spindle--thru which draw bar will be inserted to seat iso 30 tooling ground to Moore taper
spindle is R-60 hardness
my first attempt using Botek 27 inch length gundrill and sulfulated squirt can cutting fluid was characterized by 2 inch penetration at which point the carbide drill tip exploded--fragment analysis demonstrated no injury to 4 facet cutting tip but binding of flank resulting in twist breakage at silver solder junction
so--I tuned a wagner 700 psi airless paint power unit and milled 3/8 inch
window in side of drill driver hub--which seats in morse taper 3/4 inch solid socket-- a momentary foot switch pulses cutting fluid to drill
drill requires snug delrin bushing positioned 1/2 inch from spindle entry
the real discovery in this undertaking is use of espresso mix french vanilla concentrate diluted with tap water--this fluid has thus far allowed spindle penetration of 16 inches with no adverse consequence other than minor expected cutting edge dulling---I purchased 20 identical drills anticipating destruction of 19 ------------- each new drill is good for about 2 inch depth at which point chirping begins as dulled cutting edge searches for purchase--and immediate removal from service--I will regrind later on walter 8 axis unit
so analysis of french vanilla extract must incorporate minimum of 35% ethyl alcohol --statute requirement of FDA
to this the flavor chemists at Beck's add propylene glycol --
I had on hand a dozen 5 gallon containers of mostly empty Beck's concentrate
of variety of flavors--to which tap water was added
drill progress thru R60 steel is two inches/hour --flavor mixed fluid allowing increased progress and reduced breakage
so is this amateurish happening a legitimate breakthru in metalworking fluids--to truly clean and green?--likely not, but for the moment methodology facilitating a formidable undertaking
YouTube
spindle is R-60 hardness
my first attempt using Botek 27 inch length gundrill and sulfulated squirt can cutting fluid was characterized by 2 inch penetration at which point the carbide drill tip exploded--fragment analysis demonstrated no injury to 4 facet cutting tip but binding of flank resulting in twist breakage at silver solder junction
so--I tuned a wagner 700 psi airless paint power unit and milled 3/8 inch
window in side of drill driver hub--which seats in morse taper 3/4 inch solid socket-- a momentary foot switch pulses cutting fluid to drill
drill requires snug delrin bushing positioned 1/2 inch from spindle entry
the real discovery in this undertaking is use of espresso mix french vanilla concentrate diluted with tap water--this fluid has thus far allowed spindle penetration of 16 inches with no adverse consequence other than minor expected cutting edge dulling---I purchased 20 identical drills anticipating destruction of 19 ------------- each new drill is good for about 2 inch depth at which point chirping begins as dulled cutting edge searches for purchase--and immediate removal from service--I will regrind later on walter 8 axis unit
so analysis of french vanilla extract must incorporate minimum of 35% ethyl alcohol --statute requirement of FDA
to this the flavor chemists at Beck's add propylene glycol --
I had on hand a dozen 5 gallon containers of mostly empty Beck's concentrate
of variety of flavors--to which tap water was added
drill progress thru R60 steel is two inches/hour --flavor mixed fluid allowing increased progress and reduced breakage
so is this amateurish happening a legitimate breakthru in metalworking fluids--to truly clean and green?--likely not, but for the moment methodology facilitating a formidable undertaking
YouTube