Landracing Forum
Misc Forums => LSR General Chat => Topic started by: Jonny Hotnuts on January 06, 2011, 10:13:34 PM
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So the new tubing notcher I just purchased was a full 1/8+" off center line. Are you kidding me!!!!!
I had to shim the deck with washers and precision shims to get the thing in alignment.
OK, sure I was able to fix it but it just pizzes me off to no end when a brand new tool is such a POS and not even remotely close to correct.
(*note, this did NOT come from Harbor Freight)
Rant over....done.
~JH
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Johnny, the last few years I have been having a lot of problems with the quality of things I buy, too. Mostly it seems that people are in a hurry. As much as possible I like to get the folks that screwed up to fix the problem. This costs them their precious time. My feelings are, if I do not do this, lousy work will become the norm.
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JH. what notcher? I have seen a few that needed that sort of tweaking. :?
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I built my own.Has been right on center. A few other problems however.
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JH. what notcher? I have seen a few that needed that sort of tweaking.
http://www.vansantent.com/tube_coping_machines/joint_jigger.htm
OK, I get that this is the cheapest they have but.....it wasnt even close to correct alignment. Truth is now that I have it shimmed it really is not a bad unit. The notcher seems to work pretty good (and rolling through .120).
I would buy it again....but it still should be aligned from the factory.
~JH
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A bridgeport makes a nice Notcher.
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A bridgeport makes a nice Notcher.
The problem with that is when a joint is cut wrong you have to blame yourself. Can't blame the Bridgeport! :lol:
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It's easy to make joints with a Porta Band and a grinder . Two 45 deg cuts viewed from the side is a radius except for the wall thickness .
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The problem with that is when a joint is cut wrong you have to blame yourself. Can't blame the Bridgeport! :lol:
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Yeah I have a bucket full of mistakes. :lol:
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It's easy to make joints with a Porta Band and a grinder . Two 45 deg cuts viewed from the side is a radius except for the wall thickness .
Plus 1.
There are also programs out there to figure the cut angles for odd joint angles as well as odd sized tubing joints. I have found it easier to work off a centerline marked on the tubing using a piece of angle iron as a straight edge.
Ed
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It's easy to make joints with a Porta Band and a grinder . Two 45 deg cuts viewed from the side is a radius except for the wall thickness .
When I learned how handy a Porta band was it opened a whole new world.
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I broke down and bought one of these a few years ago.... it works pretty good but I too had a bucket full of mistakes at the beginning
http://www.lowbucktools.com/notcher.html
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Having spent 33 years in the consruction industry, I live by the axiom " measure twice....... cut once".
I always cut the longest pieces first, cause you can use up your mistakes on the shorter ones.
Never admit those in the bucket are mistakes........... I call them "trial fit's". Bob
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oh..... yeah...... OOPS!..... i had a bucket full of , yeah, trial fits!
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Welcome to the world of production based manufacturing. There is a reason high quality hand built items cost orders of magnitude more than the off the shelf production item of similar nature. That applies to cabinets for the kitchen down to the knife in your pocket. As a Quality Assurance Manager for a small production facility I fight this every damn day.
I will not even get into the Asian country vs. US/European manufacturing debate but simply put the guy making the parts on the shop floor just does not care anymore. I have 60 year old and 20 year old machine operators on the floor who do not care. It is not age or generation dependent. You can get around this if you have management that keeps tight control over the employees but in many cases management has only one goal and that is to get parts out the door. In my case I have to fight not only the guys on the floor but also management that wants to literally circumvent the quality control process by pulling parts straight off the machines and onto pallets to go out the door. Every delivery is rushed, every part is late, and every schedule is stretched. If they can just call it good enough and save a day of inspection in the quality lab they will do it.
We have machines that will hold 0.0005" tolerances all day long if they are setup and programed properly but if the print calls for ±.010 The programmers will not even bother to try and hit the mean numbers. Close enough for government work is the rule they seem to live by.
It makes me sad, when I was a production machinist it would upset me if I missed a dimension or scrapped a part. Now I see operators that do not have a concern in the world when they scrap a part if they even bother to notice it is out of tolerance. No worries for them, they still get a paycheck at the end of the week whether the machine is cranking out junk or perfect parts.
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I just tried my brand new SBC Pioneer Performance dampener from Summit on my billet Crower crankshaft. It fell on. This doesn't seem right. Crank snout is 1.247. Dampener is 1.249. So I call Crower. They tell me 1.247 is the correct size. So I call Summit tech service. They say sometimes Chevys with press on dampeners are smaller than Chevys with bolts in the crank. If that happens you lose. So I call BHJ. They say dampeners should be 1.2435 to 1.2445. So I buy one and call Summit customer service. Tell them the story. Guy talks to Tech guy. Tells me that 1.249 is very close to 1.2445. A thousandth of an inch is very small and they can't be expected to hit the same size every time. .005 should be close enough for anybody...... Why me?
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A thousandth of an inch is very small and they can't be expected to hit the same size every time. .005 should be close enough for anybody...... Why me?
.005 is a mile in precision machining. The "Tech Guy" at Summit has probably never actually seen a mill or lathe much less ever ran one. I die a little inside every time I see one of our operators checking a ±0.005 tolerance part with a pair of cheap digital calipers. Most of the young guys coming out of trade school we hire have trouble reading a Micrometer and do not know the meaning of gage calibration.
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33 years standing in front of a machine at the Airline. Sometimes working to 50 millionths. I knew better than to argue with the guy. He's a tech at Summit. Who could know better than that?
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If you didn't give him the part number, he probably wouldn't know what the part was.
Same thing going to Shuck's, Kragen, etal.
All the stuff they sell with their names on it is Chinese sh-t.
Ask Roy Fjstad how he feels about being ripped off by Jeg's, Summit, and Speedway Bill.
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Do you live close to them? You can bring in your crank and ask them to open boxes and find one that will fit. That may be the only way to make things work if their machining is sloppy.
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having a brigeport and various tube sanders available, I would never even consider a tubing notcher...
one of the first was utiliZing a holesaw cutter...
RICH,
you should know that the pioneer stuff is crap.
properly made and sized parts are available from BHJ or ATI
the RIGHT WAY is to hone the hub to obtain the proper "press fit"
when aided with hot water....
this is what the guy that does your crank balancing is supoose to do...!!!
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Ron; That was my plan except I would have done in myself. This was my first experience with Pioneer. Somehow I had not expected that Summit was selling worthless dampeners. I guess their customers like the easy way they go on or something. Anyway my new BHJ dampener came yesterday and life goes on.