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NC wayne
05-23-2005 22:29:38
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Re: questions for NC Wayne in reply to timbersavage, 05-23-2005 16:26:10
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Hey, I guess the easiest thing to do is answer your questions in order so here goes. As for going back to spec or oversize and sleeving there are several variables. First does the customer have a prefference, and as you can imagine some do, but most don't. Usually their driving motivation is whatever is gonna work the best and is the cheapest. The two don't always go hand in hand but that's where past experience comes in as to what was is gonna be best in a particular situation. I guess the short way of saying it is some customers have a prefference but most usually deffer to our judgment.--- Ok, on to the Milwaukee driven unit. Unless somebody else out ther is making one it sounds like your talking about a Climax setup. That's what we have and that's all it has for the power unit is basically a 3/4 Milwaukee drill motor with a different nose housing that allows it to mate up with the gearbox. Ours runs a 1-1/4 bar and it's rated to do like a 6 inch hole I believe, but it'll do more with proper bar support and if your carefull. We've made heads to clamp on the bar and, if I remember correctly, the largest bores done with it have been when Dad does the old 260 Fiat scraper necks. He's got a "spider" made up to fit inside the neck and support the middle of the bar and it works great. I even made up a trick a few years back to bore a couple of 1-1/2 inch blind holes for Norfolk Southern on a piece of their track equipment. That's one of the biggest thing when you first get going is not having all the special stuff your gonna need out in the field. To do it right and be able to be versital you need a small machine shop also, at least a lathe and Bridgeport. We use ours alot for making slugs to center center the bar in various size holes, and the special stuff like I was just describing. Most of the kits come with centering cones, or something like that but they are only good if a hole is worn oversize and nearly round. If one is egged massivly the cone is more of a liability than an asset.---YOU NEED AUTO FEED, IT IS A MUST. I emphasize that because without auto feed your just asking to tear up bits, as well as boring a through hole over about an inch would be a nightmare trying to feed by hand. As forbreaking the tool bits if you've done any checking into the prices of carbide, and good tool steel bits their expensive. That brings up another item your gonna need, a grinder for the tools bits. Without some way to sharpen all the bits as they dull down your out of business quick the first time you hit material that's really hard. Some jobs I've taken 1/2 inch out of a hole with one tool steel bit, others I've had to use carbide to take that much, others I've made one pass with carbide and its time to change, and then there are the ones that you take .001 at a time and still dull whatever bit your using. So again auto feed is a must and get yourself a bit grinder or the cost of having someone else sharpened them is gonna eat you alive.---We mainly do equipment repair of all types. Everything from the old friction cranes to farm tractors and anything in between. The boring work alone kinda comes in spells, but it's often a part of another job. Like right now dad just pulled the swing shaft out of a 5299 American crane and is gonna have to do a couple of holes in the machine where the shaft sets that have gotten wallowed out over the years for various reasons. That's the plus for us, we typically do "turn key" jobs where we tear it down, do the welding and boring and then put it back together. many outfirs do either the teardown or the boring but not both and from what we hear from customers that can be a real hassel sometimes getting everybody together to get it done as quick as they'd like it...typically yesterday...-----Beyond that feel free to write me direct if you have any more questions. I've been doing it for about 8 years now and am learning constantly and Dad's been into it for about 18 years and knows alot more than I do but he's constantly learning too. My email is Nota55Nomad@AOL.com---Good luck and I hope this helps you make a decision. I hope I haven't scared you off because there is good money in it. Right now we're at $84 hr for line boring but there are several places around here that are over $100 and are still bringing in customers too.
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