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boring a la bounty  shear with a 8.750 dia bore burnout is t1 welded on. The burnout is 5 inches thick Attached Images
Reply:That looks like a real beast to lug around.  We do a bit of work for climax from time to time.  It looks like they have some pretty nice machines.Common sense in an uncommon degree is what the world calls wisdom.
Reply:slick looking machine..very cool-Graham-Mechanical EngineerAutosport Mechanic/Fabricator
Reply:What did you use to do the welds?The vertical welds in the 2nd picture cross brace appear runny and the one side appears like the brace kicked out of place during welding instead of being flush with the surface as the other side appears.Last edited by specter; 01-23-2009 at 01:20 PM.Co-Own CNC shop:Miller :1251 plasma cutter, MaxStar 700 TIG/Stick, & XMT 456 Multiprocess Welder.&  2 Hypertherm HPR260's Plasma CutterSorry I had a bad stroke but now I am back.
Reply:Not being familiar with the tool. I have no idea what I am looking at and what is being done to what.Can someone elaborate? It looks as thought the tool is welded to the project.Lincoln Power Mig 210MP MIGLincoln Power Mig 350MP - MIG and Push-PullLincoln TIG 300-300Lincoln Hobby-Weld 110v  Thanks JLAMESCK TIG TORCH, gas diffuser, pyrex cupThermal Dynamics Cutmaster 101My brain
Reply:Not sure on my end either Joker. But it appears only a slight edge of the cross bar/support is welded. Unless its suppose to look like that.Co-Own CNC shop:Miller :1251 plasma cutter, MaxStar 700 TIG/Stick, & XMT 456 Multiprocess Welder.&  2 Hypertherm HPR260's Plasma CutterSorry I had a bad stroke but now I am back.
Reply:Here's what they do http://www.cpmt.com/videos/bm/BB5000.wmv You true the machine up to your hole, attach it to the piece to be bored out and drill your hole.  Just gotta make sure your alignment is true.Common sense in an uncommon degree is what the world calls wisdom.
Reply:The hole is being trued with a portable boring machine. The base is welded to the piece of equipment needing truing, adjusted for alignment, then the rotating bit holder is advanced thru the piece. For work too difficult to bring to a milling machine. Used a lot on construction equipment articulating joints, buckets, booms, etc. Also used to ensure multiple holes are exactly sized & aligned. Look up line boring. MikeD74Thttp://www.yorkmachine.com/Last edited by MikeD74T; 01-23-2009 at 01:40 PM.Reason: added link
Reply:its a lug but it assembles in peices. There was 1 inch of metal removed from this hole a york or climax would take a year to cut that much in a t1 burnout. The welding shop should have been closer but that is life and that is what this boring machine does well it will cut 1/4 per side in one cut.
Reply:Originally Posted by specterWhat did you use to do the welds?The vertical welds in the 2nd picture cross brace appear runny and the one side appears like the brace kicked out of place during welding instead of being flush with the surface as the other side appears.
Reply:Originally Posted by steve lovingits a lug but it assembles in peices. There was 1 inch of metal removed from this hole a york or climax would take a year to cut that much in a t1 burnout. The welding shop should have been closer but that is life and that is what this boring machine does well it will cut 1/4 per side in one cut.
Reply:Ok...what is a T1 burnout?I don't ever get to work on crap that big anyway.....but I want to know.Lincoln Power Mig 210MP MIGLincoln Power Mig 350MP - MIG and Push-PullLincoln TIG 300-300Lincoln Hobby-Weld 110v  Thanks JLAMESCK TIG TORCH, gas diffuser, pyrex cupThermal Dynamics Cutmaster 101My brain
Reply:Joker11 - T1 is a high strength steel alloy.A burn-out is a steel shape that has been flame cut, (burned), to an accurate shape and size by a mechanized torch or burning table.Steveloving  -  Nice post of a nice rig on a nice job! Does the feed have a separate motor?I'll bet you know lots of center finding tricks. Good LuckLast edited by denrep; 01-23-2009 at 08:45 PM.
Reply:i can take a 1/2 cut on a 36 or welded up bores this t1 hardend and was tough to cut but i did take about a 1/4 at a time. the first pic is a centering spiders for this bore i have set up cones for bores 2- 6 i usally dont do bores this large myself. i have pulled string and everthing else over the years to find center of bent arms etc.
Reply:forgot no it dosent have a feed motor ive been geeting to that for about 10 years. i just feed with a ratchet but i need to update.
Reply:Sorry about my assumption on that running weld that is why I asked what method was used for the welds. I wasn't sure if that was slag. Guess I need to get my vision checked.Co-Own CNC shop:Miller :1251 plasma cutter, MaxStar 700 TIG/Stick, & XMT 456 Multiprocess Welder.&  2 Hypertherm HPR260's Plasma CutterSorry I had a bad stroke but now I am back.
Reply:put a servo feed from a bridgeport mill on there , @ 135.00 dollars.built  a few machines for everyday work using hollow shaft gear boxes and vfd drives for speed control.  built  a couple of single use machines for specific jobs.do you ever use the brazed carbide bits for boring ( BR ) or just regular lathe bits ?insert thoughtful quote from someone else2000 Thermal Arc 300GTSW 3.5 hours1946 Monarch 20 x 54 Lathe1998 Supermax 10x54 Mill2004 Haco Atlantic 1/2" Capacity Lasernot mine but i get to play with it
Reply:Originally Posted by steve lovingboring a la bounty  shear with a 8.750 dia bore burnout is t1 welded on. The burnout is 5 inches thick
Reply:so you have to true up the axis of the machine to the hole so when you drill it, it doesnt oblong you original hole right?   what are your tolerances?  we talking 1/8" 1/16"?  reason why i ask is because it looks like you true the machine up and then weld the struts on to the housing so it dont move..  i would be worried about the heat moving the peice a smidge.
Reply:If you look at the shot showing the cutting end of his machine, you can see adjustment bolts for moving the bearing to center it. It appears he has centering bolts for the outboard bearing too, the one on the back side of the cutout. He stated earlier that he holds to 0.001" although that might have been in the other (almost duplicate) thread on this subject.
Reply:http://www.newmantools.com/cttb.htm#blinki have had real good luck with the BR & BL style, , just grind  alittle flat on the tip to keep it from chipping, they have an increased top rake.insert thoughtful quote from someone else2000 Thermal Arc 300GTSW 3.5 hours1946 Monarch 20 x 54 Lathe1998 Supermax 10x54 Mill2004 Haco Atlantic 1/2" Capacity Lasernot mine but i get to play with it
Reply:shott oldiron  knows you just center the bearings then weld the machine on including drive then after cool you line up everything with your adjustments one last time. you can make  slip fits press i have welded washers on to set up final cut before i got to the bore itself. Chenry seems like boring hard stuff a real sharp with to much rake chips like you say. i use ar/al and slightly round the point on harder stuff with maby 3 degree rake works pretty good i havent used the br/bl ill try them
Reply:i ahve  afew pieces of cleveland mo-max and some old stellite bits that would last forever.i dont think i ever bored anything as hard as you have there.we built  a custom set up to true the bore of a 60" single ended cylinder ( large injection molding press) we used it to bore the cylinder and to hone it to final size.  never once thought to take pictures for posterity.insert thoughtful quote from someone else2000 Thermal Arc 300GTSW 3.5 hours1946 Monarch 20 x 54 Lathe1998 Supermax 10x54 Mill2004 Haco Atlantic 1/2" Capacity Lasernot mine but i get to play with it