http://www.todaysmachiningworld.com/forum/forum/cutting-tools Brought to you by Todays Machining World en-US Fri, 30 Jul 2010 02:58:47 +0000 http://bbpress.org/?v=1.0.2 q http://www.todaysmachiningworld.com/forum/search.php http://www.todaysmachiningworld.com/forum/topic/does-anyone-remember#post-769 Thu, 01 Apr 2010 18:41:04 +0000 Anonymous 769@http://www.todaysmachiningworld.com/forum/ <p>I used to buy tools marked krt as spade spode drills. Do they exist anymore? </p> http://www.todaysmachiningworld.com/forum/topic/hex-punch#post-768 Mon, 22 Mar 2010 19:42:34 +0000 Anonymous 768@http://www.todaysmachiningworld.com/forum/ <p>Can I use a slater broach as a punch? I want to press a 1/4 inch hex a 1/4 inch deep in aluminum. </p> http://www.todaysmachiningworld.com/forum/topic/precision-turning-4140h#post-584 Thu, 23 Jul 2009 14:26:47 +0000 Anonymous 584@http://www.todaysmachiningworld.com/forum/ <p>Can you anneal the material? </p> http://www.todaysmachiningworld.com/forum/topic/precision-turning-4140h#post-582 Thu, 23 Jul 2009 00:00:20 +0000 Anonymous 582@http://www.todaysmachiningworld.com/forum/ <p>The article is named "Precision turning 4140H" you say "the slug" wich all implies a turning opperation. In what make and type of machine is not listed nor is the type of tooling or coolant If any.<br /> I would turn the slug with a carbide insert tool and leave a finishing pass if you have the extra material. This material can work harden and change from 25RC to 65Rc in the wrong conditions. If you could tell us more of what you want to do, and what you have to do it with, we can help more.</p> <p>Good Luck! </p> http://www.todaysmachiningworld.com/forum/topic/cutting-tool-distributors#post-480 Tue, 05 May 2009 18:58:03 +0000 Anonymous 480@http://www.todaysmachiningworld.com/forum/ <p>Thanks for the tip. CTE had a nice list, but this is the one I was looking for. As it turns out, it wasn't just for cutting tools, but was listed under industrial distributors.<br /> <a href="http://www.inddist.com/channel/2008_Big_50.php" rel="nofollow">http://www.inddist.com/channel/2008_Big_50.php</a> </p> http://www.todaysmachiningworld.com/forum/topic/cutting-tool-distributors#post-478 Mon, 04 May 2009 21:24:30 +0000 Anonymous 478@http://www.todaysmachiningworld.com/forum/ <p>Try the Cutting Tool Engineering buyers guide. It may be online. If not call them and ask for a copy. </p> http://www.todaysmachiningworld.com/forum/topic/cutting-tool-distributors#post-477 Mon, 04 May 2009 21:24:29 +0000 Anonymous 477@http://www.todaysmachiningworld.com/forum/ <p>Try the Cutting Tool Engineering buyers guide. It may be online. If not call them and ask for a copy. </p> http://www.todaysmachiningworld.com/forum/topic/cutting-tool-distributors#post-476 Mon, 04 May 2009 20:20:15 +0000 Anonymous 476@http://www.todaysmachiningworld.com/forum/ <p>Where can I get a handy list of the largest 10 - 20 cutting tool distributors? i started searching online, but once I found 'Bob's cutting tools' (example), I gave up. </p> http://www.todaysmachiningworld.com/forum/topic/useage-of-different-turning-tools#post-439 Sun, 19 Apr 2009 19:12:50 +0000 Anonymous 439@http://www.todaysmachiningworld.com/forum/ <p>Hi - I'm just learning to use a lathe and have bought a set of turning tools that include the following (I found the descriptions on the net):<br /> ISO 2: Left- and right-oriented cranked turning and facing tools<br /> ISO 6: Cranked knife tool<br /> ISO 7: Parting tool<br /> ISO 8: Boring bar </p> <p>It's all pretty obvious to me which tool to use when, except for the knife tool. Can anyone tell me what type of cuts it's supposed to be used for? And why are they called "cranked" tools?</p> <p>Cheers<br /> Dorian </p> http://www.todaysmachiningworld.com/forum/topic/breaking-taps-making-parts-high-strength-low-alloy-60-and-80ksi-minimum-yield#post-402 Wed, 15 Apr 2009 14:55:10 +0000 Anonymous 402@http://www.todaysmachiningworld.com/forum/ <p>All of the suggestions are good. You did not say what machine you are using to tap with. The general rule is to make the minor dia as large as possible to meet the spec or print. The second is to slow the tap down, perhaps below 20 sfm. Next is a good steam oxide tap like osg or hypro. I would choose a 3 flute spiral point to start with. </p> http://www.todaysmachiningworld.com/forum/topic/inconel-gtd-444#post-399 Wed, 15 Apr 2009 10:41:34 +0000 Anonymous 399@http://www.todaysmachiningworld.com/forum/ <p>Has anyone machined any GTD 444 material? i am trying to get a handle on this turbine blade material and was looking for some feedback from anyone that might have done some. </p> http://www.todaysmachiningworld.com/forum/topic/precision-turning-4140h#post-263 Fri, 13 Mar 2009 01:29:11 +0000 Anonymous 263@http://www.todaysmachiningworld.com/forum/ <p>What type on machining are you doing? Turning, milling,grinding? </p> http://www.todaysmachiningworld.com/forum/topic/indexable-carbide-inserts-single-point-turning-benefits-of-molded-vs-ground#post-139 Fri, 20 Feb 2009 02:26:15 +0000 Anonymous 139@http://www.todaysmachiningworld.com/forum/ <p>Egghead has it right on. Also you may not be able to experience the extra benefit of the ground inserts if your machine has some wear on it and won't cut real accurately anyway. </p> <p>I have't used non-indexable tools in almost a decade now due to the savings and flexibility of the newer alternatives. </p> <p>The real glaring difference I've seen is when using indexable milling tools. The ground inserts are the only way to go in this instance in my opinion. The accuracy of the ground ones is almost required to ensure even insert chip load.<br /> Rgds,<br /> John </p> http://www.todaysmachiningworld.com/forum/topic/breaking-taps-making-parts-high-strength-low-alloy-60-and-80ksi-minimum-yield#post-122 Tue, 17 Feb 2009 12:42:20 +0000 Anonymous 122@http://www.todaysmachiningworld.com/forum/ <p>Did your vendors recommend a steam oxide treatment? You didn't mention if the holes are blind or thru. Iv'e had success with gun taps on thru holes in tough, heat resistant high nickel alloy castings. The tap doesn't have to deal with stong chips in the flute. They are pushed ahead of the tap. </p> http://www.todaysmachiningworld.com/forum/topic/precision-turning-4140h#post-117 Mon, 16 Feb 2009 21:12:55 +0000 Anonymous 117@http://www.todaysmachiningworld.com/forum/ <p>I would be able to help if you could give lots more info about this application. </p> http://www.todaysmachiningworld.com/forum/topic/breaking-taps-making-parts-high-strength-low-alloy-60-and-80ksi-minimum-yield#post-115 Sun, 15 Feb 2009 23:46:12 +0000 Anonymous 115@http://www.todaysmachiningworld.com/forum/ <p>If this is being done on a CNC machine, another option is thread milling. There are manufacturers that make thread mills down to 2-56 threads. Also, some of the top tap manufacturers make coolant through taps. This could be another option. </p> http://www.todaysmachiningworld.com/forum/topic/precision-turning-4140h#post-98 Fri, 13 Feb 2009 18:16:26 +0000 Anonymous 98@http://www.todaysmachiningworld.com/forum/ <p>We are haveing a difficult time holding tolerances (.005mm) because the material hardness is so inconsistent, even within the slug. Any suggestions? </p> http://www.todaysmachiningworld.com/forum/topic/breaking-taps-making-parts-high-strength-low-alloy-60-and-80ksi-minimum-yield#post-80 Fri, 13 Feb 2009 11:54:03 +0000 Anonymous 80@http://www.todaysmachiningworld.com/forum/ <p>I agree.<br /> Reduce your drilling and tapping speeds and use a heavy sulphur-based coolant.<br /> Use carbide tools if you can, but any tools need to be sharp, even if after only 5 cuts.<br /> Tom </p> http://www.todaysmachiningworld.com/forum/topic/indexable-carbide-inserts-single-point-turning-benefits-of-molded-vs-ground#post-64 Wed, 11 Feb 2009 21:17:05 +0000 Anonymous 64@http://www.todaysmachiningworld.com/forum/ <p>Typically the ground insert allows for a more precise index of the insert from edge to edge. If your holder is worn and you have to make excessive offset it is a waste of money using the ground insert. (This would be typical of a knee or long turn operation on a screw machine) If you are on a cnc and keep your holder in good shape, the ground inserts will help you keep your scrap cost down by making minimal or no offset at all.</p> <p>If you are using the ground insert for cutting edge prep or to help with chip control that can be worth the investment.</p> <p>From my experience 80% of the time molded inserts work. Now most of my experience comes from the turning side of life in the screw machine world and some fixed head stock cnc.</p> <p>Ask your tooling distributor what would work best, why am I not using molded inserts and have them bring in the manufacturing rep. If they can’t give a good reason to be using molded inserts then they are just trying to inflate their sales. </p> http://www.todaysmachiningworld.com/forum/topic/breaking-taps-making-parts-high-strength-low-alloy-60-and-80ksi-minimum-yield#post-63 Wed, 11 Feb 2009 21:13:03 +0000 Anonymous 63@http://www.todaysmachiningworld.com/forum/ <p>You've got to be getting localized hardening due to your mig and laser cutting operations. Can you draw the temper in the holes back a bit with a torch? Are you using two flute taps? If so, I'd stick with a 3 flute. I'd be inclined to open up the pilot hole slightly even if you didn't get a 75% thread. </p> http://www.todaysmachiningworld.com/forum/topic/indexable-carbide-inserts-single-point-turning-benefits-of-molded-vs-ground#post-52 Wed, 11 Feb 2009 16:46:02 +0000 Anonymous 52@http://www.todaysmachiningworld.com/forum/ <p>Currently we are utilizing indexable carbide inserts for single point turning processes more frequently in our shop. It appears that most of these inserts are available in “Molded” or “Ground” tolerances. Can you tell me the benefits of one over the other? And how will I see the performance advantages from the more expensive “Ground” inserts? </p> http://www.todaysmachiningworld.com/forum/topic/breaking-taps-making-parts-high-strength-low-alloy-60-and-80ksi-minimum-yield#post-49 Wed, 11 Feb 2009 16:37:11 +0000 Anonymous 49@http://www.todaysmachiningworld.com/forum/ <p>Our company has been processing a family of parts made from high strength, low alloy, 60 and 80ksi minimum yield steel plate. After laser cutting and Mig welding, we machine a series of holes using conventional drills, spade drills, boring bars and taps. The problem is we keep breaking taps of all different sizes, 5/16"-18, 3/8"-16 and even 3/4"-10. We have approached a number of industry representatives who keep moving the taps to successively more expensive versions intended for alloyed cutting, but they don’t solve the problem. Until this thing gets fixed, in order to produce a good part we need to destroy the tap that was in the hole, clean the hole out, weld it shut, and remachine the hole by hand. As you can imagine, this issue is killing delivery performance and profitability. </p>