How To Swipe-to-Center Technique on a Bridgeport
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- Опубликовано: 27 апр 2016
- RUclips viewer and subscriber ‘htral’ noticed a useful technique that Don implemented on the Bridgeport in a recent video, so we decided to head into the shop and show you how to do it. It may seem like common sense, but there’s a lot more than meets the eye. Thanks for watching ‘htral,’ hope this helps out!
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I had never heard of this technique prior to seeing this video last year. Now I use it all the time. Thanks for the tip!
Glad you were able to implement it yourself! Thanks again for watching.
Love that trick. Thanks so much. I've seen so many tricks from accomplished machinists. You would never think of that on your own.Tom
This technique is also accurate enough to make keyways in a shaft with an end mill. Many thanks, Don.
Great trick, I'll have to try this on the drill press. I've just used the measure it over method, the eyeball it method, or the method with a center in the drill chuck, and you touch off in the middle of a 6" ruler, and move the part until the ruler is level.
Looks like the "swipe" technique should be easily within +/- 0.005" every time. The human eye is an amazing precision tool. Thanks for posting this short cut.
Cool trick.
I never thought of that.
Thanks, Don.
YAY, GLEN!
John
Thanks that's a good one. Oh yes the center is the highest point of the round part. Thanks for sharing.
Classic solution, even works without a DRO.
Great tip. I’ve done the teeter-totter ruler trick but this might reduce the mechanical error and leave only human error. Thanks!
Cool trick Don!
I can see a use for this when drilling the tapping hole in a ball knob / handle , you could swipe in the X and Y axis then and find the centre with perfectly acceptable accuracy.
Good tip, thanks for sharing!
Really great shortcut!!!
Thanks Don!!!
You're welcome, thanks for watching!
with the drill (or whatever) in a collet, you can also run the table in Y and use a piece of rolling paper and touch off on the back jaw of the vice, do the same on the front jaw of the vice --- then take the average of the two DRO readings as the center. I do this all the time when the center does not need to be more accurate then say 5 thou -- particularly with flat stock as opposed to round stock (can't swipe to center with flat stock). Saves chucking up a center finder in a collet, and then having to then take it back out and put in a tool like a drill that you need to do the operation.
I could be wrong, but I believe HTRAL refers to South Bend's book entitled: How To Run A Lathe. That's a nice trick, not everyone has a DRO.
Great tip. Thanks!
+Jason Gabriel You're welcome.
Ah yes, amongst the most important profit killers... over-precision.
I am guilty.
Mark Richardson it depends. The company I work for pride themselves on the fact we're precision toolmakers. But I agree on what you said as some companies unnecessarily over engineer everything. We get fabricators that sub work onto us with a tolerance of +- 1mm and our boss still wants us to get it within +-0.005mm. Two different markets I guess.
Nice trick, I have to drill a lot of holes in some 1.75 pipe this will be handy , thanks.
very clever Thank you
Nice video Don. Good to see you Glen. I thought you retired.
love quick tips...
Nice tip.
iv used this but never knew to call it swipe. I do like the center finder v shape jig
I tuned in to hear the "You can do it better with a DRO" comments. Of course you can. But you can do this withOUT a DRO. You could do this with a 50 dollar drill press. With a little rigging, you can do this in the field with a cordless drill, while underwater, on fire, and being shot at. Thanks - Lumpy
First, nice video!
Very nice intro.
good. job
like more tips like this, thanks
Hello Don
Nice video. I think it would of have been cool to drill the hole thru just to see how accurate or good that technique is.
+tomasobamela Thank you. We made this video in reference to a recent video where Don utilized this technique to drill a part. You can view it here: ruclips.net/video/-JhdLMdg_bA/видео.html
No V block for that round stock?
Don What brand and model # safety glasses are you and Glen wearing ? I notice they seem to fit over Glen's normal glasses very well. Thanks.
+Stephen Smith Crews OG110AF
I love these videos but that was slower than doing it right lol
Surprised, you did not show how to do this for a keyway as well.
That's a pretty awesome trick for a "good enough" for a human hole.
Or better yet, keep the fixed jaw set to "absolute zero" on the DRO and move Y axis to half the diameter of item to be drilled. Dead nuts on and quicker too.
Can't always keep the back jaw at zero on the DRO. Maybe you just indicated a hole in a part & set 0, 0 on a previous set up for example. Now you have to re-indicate back jaw in again. Your idea isn't all that practical.
Gotta ask, why not not just use an edge finder on the vise jaws to find center?
+Finn Custom Knives As explained in the video at 3:15, you can use an edge finder; but, when drilling a hole that is _not_ a critical dimension, the small increase in precision isn't worth the amount of time it would take to use an edge finder.
Drill/Countersink combo, not centerdrill....good info though....cheers
don not every understands ur showing a quick way to center that dose not have to be precise and for someone who might not have dro theses newbies thank every thing has to be done with dro or cnc they dont know that most of the morden world was built before cnc and dro when a man had to use his brain