Quick Adjusting Automatic Closing Spring Nut

My guess is that it is part of, designed and manufactured with the instrument. Perhaps buy a new caliper, it might turn out to be cheaper than what you are looking for.

Hi Lyn,

Excellent. Except for the non ferrous issue that is exactly what I have been looking for. The non ferrous issue is for a compass used in orienting the telescope base seen in my personal file picture.

Many Thanks

John

What non-ferrous issue?

Doesn't appear that the example picture you posted was non-ferrous, and I can't read minds!

Sorry Lyn.

Earlier today I carefully wrote a very detailed description of what I wanted on a separate document including 2 pictures and every imaginable detail. I did this because of the time out feature in this forum which I had discussed about a week ago. I then signed in to CR4 and opened the question page then tried to copy and paste all this work into the question box. It DIDN´T WORK!!!!!!!!!!!

So, desperate, I tried one more time writing as fast as possible and left some details out. I do not expect you to be able to read my mind. The ferrous issue was in the long detailed letter which the CR4 system didn´t like. I give up!

I apologize if I have offended you. I also want to thank you for steering me to this company. I have now contacted them asking about bronze or brass.

Very very sorry again.

CR4 seems to be too much for me.

Best Regards

John Van Allen

I suffer under similar problems.

Yours may be due to the editor you used with hidden codes.

Try using the simple text editor that is available in most windows versions.

Called editor. It should then copy OK, using Control a or c and control v.

It would be very nice of you if you told us what you wanted it for, we may be able to find something even better for you!!

If it is only to repair a caliper, I tend to think you are being a little too careful with your money, simply buy a new one!!! (already mentioned I believe!)

Thanks Andy,I modified my surveying transit to use with my telescope and made long threaded adjusters with knurled thumb screws but it takes a lot of adjusting to move them long distances so when I looked at my old calipers it gave me the idea. I´ll send you a picture.

With this adjuster I can level the head precisely for the wedge which supports the Questar telescope. They work great by the way.

Well, the image did not show up, but maybe the link will work, or:

http://www.mscdirect.com/product/01376615.

it's not non-ferrous, but maybe someone makes it in brass or aluminum, or 300 series stainless.

Or, you could make your own using the concept from Lynn's post with an end mill, a good vise, and drill press. Just drill through the threads at a slight angle.

Does that small amount of steel really affect the compass that much? I had no idea, but I'm not into star gazing.

Yes, I considered that and thanks for the idea. I contacted the company that sells the quick acting nuts which Lyn suggested and asked them about brass or bronze and they answered no. I then asked them if they would give me the contact info for the machine shop who makes them. They said no too.

I´m going to go ahead and order 3. I suppose that by being evenly distributed at 120° on the tripod legs the compass effect should be neutralized. Heres the tripod set up.

Have you tried Misumi?

US-Misumi-ec.com

They have practically everything.

AH!

Thanks for the explanation.

How about tiny stepper motors and a simple 555 driver? A few small batteries and you are away..... Could be ounces rather than pounds.

Or saw some nuts in half maybe.....not mine or yours!!