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Thread: A different style boring head

  1. #11
    marksbug's Avatar
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    I have some of those trees in my yard. I once worked in a prototype shop, programing&running the cnc mills off prints and out of my head. many times the prints were rong...especilay when the owner (engineer,machinist etc) did them.... or when they were done by a engineer that did not know basic real life things like...bend raidi changing locations when things are machined then bent and different thickness material alters that also... aerospace, defense engineering shit.....sometimes I wonder weather they can get thier zippers down before or during or after the peeing down their own leg process begins.( male&female, engineers). those sure are pretty pictures(cad) I dont do any of that stuff hear at home...the only place I work any more.I probably should. be eazer to remember stuff than paper.

  2. #12
    Frank S's Avatar
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    Well I am off to plan "C" the idea of placing a set bolt in the center would only work for up to about a 1/4-20 without having to cut into the center shaft that goes in the collet and I feel that anything less than a 3/8-16 would not do much if I ever needed to use a longer boring bar cutter like for going into 3 " or so, and should I go ahead and install the 3/8" diameter bolt the relief area required for the head would require me ot mill away a notch that would remove nearly half of the shaft which would weaken it too much for comfort. So I will have to install 1 or 2 set screws at angles to the original lock.
    Another thing I noticed after grinding the plates and trying the boring head again was as long as I force myself to take very tiny cuts it works great, however I noticed that I have quite a bit of slop in the quill bearings so I am going to have to deal with those soon.
    Never try to tell me it can't be done
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  3. #13
    marksbug's Avatar
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    a real good quality1/4 or even 5/16 grade 8 with a hardened wavy washer under the head.will do a lot more than most people think torqued at only 14~18 pounds on that short of a bolt. as far as the 2 extra set screws, either use a "puck","key" something to keep from making an impression and making adjustability a chore. of coarse hardening the entire thing would also be a good way to keep brinelling&deformation ( boogering up)to a minimum. I tend to get impatent and dont like a lot of little cuts....thus..I sometimes swear a lot when something gets cut toomuch...., my worst thing seems to be making a new tool and not marking it for what it is and...sometimes it gets grabbed thinking it's a drop or whatever and... turned into annother tool...with out realizing it. especialy on round stock Ive made to hold something inpaticular to machine that part......and when Im done...ferget to mark it for what it is. sometimes scraps... are not realy scraps. I do repourpose a lot of stuff, like engine parts...forged piston tops are sweet for oh somany things. camahafts are great for many things too, but be carful if you try to cut the lobes off with a lathe it will beat the shit out of the lathe, those lobes are hardened. I started using a chop saw to cut the lobe's down before sticken in the lathe. keep on making and posting good stuff.we all need new ideas. even just seeing something gets our minds to wandering on something we havent thought of that isant the same but might have just 1 part that will set things in motion. as for the quill bearings....that tree your having lunch under is on a path that has no end.....


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