I have a B&S .0005 per line. Is this accurate enough ? Or should I be looking at getting a .0001 per line ?
I need a probe extension for the B&S ($40)
or I think I can get a Mikioto for around $100 for the job.
Your Thoughts ?
Thanks
Adam
You don't necessarily need a 0.0001" indicator for chambering work but you do need an indicator that has light enough tracking that it will display any movement of the stylus tip.. That is, if the stylus moves any at all the dial will display the change. The very best dial indicator made is the Interapid....period!!!
With a top quality indicator, and indicating for the chamber neck, you are not concerned with HOW MUCH movement, you are concerned with ANY movement.
Read what the dial indicator experts have to say-- these folks have been in the dial indicator sales and repair business for over 40 years. They have seen and repaired them all.
http://longislandindicator.com/p116.html
http://longislandindicator.com/p23.html
There are several dial indicators on the market, Mitutoyo, Starrett, Lufkin, Fowler, Brown & Sharpe, et al, that will work for benchrest quality chambering, if, like Don mentions, are properly set up.It depends on the way you chamber. If you pre-drill, indicate throat area, and pre-bore, then the little Mitutoyo is great. You can reach in pretty far with pin point resolution.
For other methods, the Interrapid would be my choice.........jackie
Also, make sure that you are using a solid base and indicator arm setup.
Over half the gunsmith I see who have gone to all the extra expense and troubles in getting the best .0001 indicators and long stylists, then attach them to the flimsiest and over extended base/arm setups, that in the end reduce their real world resolution to the .002-.003 range, and they go on happily thinking that they are working in the tenths. Some are revered gunsmiths on this very messageboard................Don
Read what the dial indicator experts have to say-- these folks have been in the dial indicator sales and repair business for over 40 years. They have seen and repaired them all.
http://longislandindicator.com/p116.html
http://longislandindicator.com/p23.html
OK, then who do you think makes the best indicator holder for chambering?
OK, then who do you think makes the best indicator holder for chambering?
One of the bigger problems in using a magnetic base, especially on a lathe is that the base is....magnetic. It tends to pick up every little particle and put those particles between the base and the machine.Noga magnetic base.....extremely easy to use compared to the arm types.
Love mine.
Gene
One of the bigger problems in using a magnetic base, especially on a lathe is that the base is....magnetic. It tends to pick up every little particle and put those particles between the base and the machine.
Clamping the indicator shank in a tool holder is the most rigid. Clamping it in a tool holder also gives you two axis of motion you can use to position the indicator stylus point without having to force it around and possibly damaging the innards of the indicator.
Don, as the saying goes " a picture is worth a thousand words" Maybe the next time you do a setup you could take a couple of pictures and post them for our benefit.
That dial indicator is the Interapid 300 series!!!! Fact!!!