|
|
I read where you use round thread cutting dies to cut new threads and most hex dies are for thread repair. I needed to add about an inch of thread to these hooks and not having any round dies I used a hex die. The threads came out more square like Acme threads but they work fine, is it going to matter and what's the difference? Would a round die give me the sharper threads?
Attached Images
Last edited by bigb; 04-05-2021 at 07:46 PM.Miller Challenger 172Miller Thunderbolt AC/DC 225/150Miller Maxstar 150 STLVictor 100CVictor JourneymanOxweld OAHarris O/ASmith O/A little torchNo, that's not my car.
Reply:
Originally Posted by bigb
I read where you use round thread cutting dies to cut new threads and most hex dies are for thread repair. I needed to add about an inch of thread to these hooks and not having any round dies I used a hex die. The threads came out more square like Acme threads but they work fine, is it going to matter and what's the difference? Would a round die give me the sharper threads?
Reply:
Originally Posted by 12V71
I think your hook had rolled threads, that will displace metal higher than the O.D. of the rod. Cut threads usually require the diameter of the stock to be the same as stated on the Die. If you check that rod with a caliper I'll bet it isn't the full size of the existing threads. There are Hex dies for restoring threads and there are hex dies for cutting threads... Yours is a cutter.
Reply:
Originally Posted by bigb
Sure enough, the rod is a little under, like 3/64" but the nuts fit tight and don't rock. I just jammed two against each other and they cinch up plenty tight. How can you tell my die is a cutter?
Reply:Thanks, and to think I had 9 weeks of machine shop in high school and I wasted it.Miller Challenger 172Miller Thunderbolt AC/DC 225/150Miller Maxstar 150 STLVictor 100CVictor JourneymanOxweld OAHarris O/ASmith O/A little torchNo, that's not my car.
Reply:The die also says "START FROM THIS SIDE", I've never seen a rethreading die that said anything on it other than size, pitch & make.IMPEACH BIDEN!NRA LIFE MEMBERUNITWELD 175 AMP 3 IN1 DCMIDSTATES 300 AMP AC MACHINEGOD HELP AMERICA!Freedom is never more than one generation away from extinction.We didnt pass it to our children in the bloodstream".RONALD REAGAN
Reply:I've heard a lot of very educated machinists insist that the hex dies are meant for cleaning up damaged threads, but they can never explain why. Sure, there are thread-repair dies that also have a hexagonal outer body, but that doesn't mean a die with a hex body is automatically meant only for cleaning damaged threads.The only repair "dies" I want are the two-piece or clamshell variety that allow you to wrap around the threaded portion wherever you want. Most threaded pieces are going to be buggered up on the ends where someone banged them around with a hammer, exactly where you need to get with a traditional die but can't because the threads are all buggered up!If it's a solid die like yours, it's for cutting new threads and can also be for cleaning up threads if you can get to them. The outer shape doesn't matter at all other than making the die far stronger in the wrench unlike the round versions that rely entirely on the grub screws to stop them from spinning.
Reply:
Originally Posted by VaughnT
I've heard a lot of very educated machinists insist that the hex dies are meant for cleaning up damaged threads, but they can never explain why. Sure, there are thread-repair dies that also have a hexagonal outer body, but that doesn't mean a die with a hex body is automatically meant only for cleaning damaged threads.The only repair "dies" I want are the two-piece or clamshell variety that allow you to wrap around the threaded portion wherever you want. Most threaded pieces are going to be buggered up on the ends where someone banged them around with a hammer, exactly where you need to get with a traditional die but can't because the threads are all buggered up!If it's a solid die like yours, it's for cutting new threads and can also be for cleaning up threads if you can get to them. The outer shape doesn't matter at all other than making the die far stronger in the wrench unlike the round versions that rely entirely on the grub screws to stop them from spinning.
Reply:Typically the hex die is on construction sites for restoring thread. The round type is used to make new thread. I have set of round that was from 1960's and just replaced the tap or die that wears out. Just good set that has good box as in time you will need to place and good box is handy.Dave
Originally Posted by bigb
I read where you use round thread cutting dies to cut new threads and most hex dies are for thread repair. I needed to add about an inch of thread to these hooks and not having any round dies I used a hex die. The threads came out more square like Acme threads but they work fine, is it going to matter and what's the difference? Would a round die give me the sharper threads?
Reply:In the UK you pay more for hex dies. They're better for repair work than round dies, because you can use spanners, sockets etc on them and get them into tight spaces.As for cutting new ones... they all cut the same, depending on quality... hex or round, as long as they're not specifically made for rethreading then its all good.I'd love a full set of hex dies, but they're too expensive for what I need and use them for.Murphy's Golden Rule: Whoever has the gold, makes the rules.
Reply:I was very lucky when I found these at a yard sale for $5 and US made to boot. Granted it was 30 years ago but even then it was a great price.
Attached Images
Miller Challenger 172Miller Thunderbolt AC/DC 225/150Miller Maxstar 150 STLVictor 100CVictor JourneymanOxweld OAHarris O/ASmith O/A little torchNo, that's not my car.
Reply:
Originally Posted by bigb
Sure enough, the rod is a little under, like 3/64" but the nuts fit tight and don't rock.
Reply:https://www.kmart.com/jme-innovation...p-00903764000P
Reply:Now if someone would recommend a GOOD tap wrench I’d like to replace mine. I have a couple including one that was supposed to be good quality that loosen as you try to tap a hole. It’s aggravating to constantly tighten the handle to the tap.Burt _____________________Miller Syncrowave 250Millermatic 211Miller 375 Plasma Cutter Hobart Handler 12010FtDrillBit.com
Reply:
Originally Posted by wb4rt
Now if someone would recommend a GOOD tap wrench I’d like to replace mine. I have a couple including one that was supposed to be good quality that loosen as you try to tap a hole. It’s aggravating to constantly tighten the handle to the tap.
Reply:I use an adjustable spanner. I've never, ever felt the need for a proper tap wrench.Murphy's Golden Rule: Whoever has the gold, makes the rules.
Reply:I use the lisle tap sockets quite a bit. Starrett or greenfield tap wrenches are really nice but expensive..
Reply:
Originally Posted by wb4rt
Now if someone would recommend a GOOD tap wrench Id like to replace mine. I have a couple including one that was supposed to be good quality that loosen as you try to tap a hole.
Reply:A wonderful old Beauty I picked some time back on Ebay.
All the good old ones were forged, then machined. They do not break.You simply can't find tools as good as these anymore. Starrett maybe, but extremely pricey.
Reply:Leastways.............I believe they were forged.
Reply:
Originally Posted by bigb
I was very lucky when I found these at a yard sale for $5 and US made to boot. Granted it was 30 years ago but even then it was a great price.
Reply:
Originally Posted by VaughnT
I'm a huge fan of the old Greenfield Tap&Die wrenches and handles. You just don't get nicer builds and they made them for a lot of companies back in the day.The good news is that they're pretty easy to come by on ebay and other places. The key is how the center portion has the look of machined surfaces and no parting lines from being cast in a mold. https://www.ebay.com/itm/Vintage-Lit...AAAOSwxxlgaLarThey will loosen up as you turn, but that's a function of your hand moving the handle and you can't really get away from it. A good wrench will minimize that, but there's always some tightening required as you work the tap back and forth.
Reply:I use the tap sockets also, after breaking a couple of tapping wrenches, would love to have a way to drive the dies with power. I hadnt thought of getting the hex dies then i could use a standard socket to drive them.Do not argue with an idiot. He will drag you down to his level and beat you with experience.
Reply:
Originally Posted by CAVEMANN
I hate that style of tap handle, I very much prefer a "T" handle with a center hole in the, top to facilitate starting the tap straight with a center.
Reply:
Originally Posted by bigb
Got a pic? I use this often but no hole on top |
|
发表于 2021-9-1 23:14:10