Old 07-07-2018, 04:41 PM #1
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Default What is the name of the tool I need?

Hello,

I have a handful of lasers and flashlights that have a cap or insert in the threading that require a way to hold two divots machined into it so that the part can be tightened or loosened. I need to repair and clean the lens on one of my lasers and I cannot remove it without a tool for this purpose. My google-fu is failing and I can't seem to find a way to do this.

Here is a pic of what I am talking about.

https://imgur.com/a/71TIxev

Thanks!!


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Old 07-07-2018, 04:49 PM #2
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Default Re: What is the name of the tool I need?

Lens spanner wrench
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Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be ~very~ roughly ~10% the diameter of the moon or sun at their distances.

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Last edited by Alaskan; 07-07-2018 at 04:52 PM.
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Old 07-07-2018, 05:15 PM #3
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Default Re: What is the name of the tool I need?

Thank you very much!
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Old 07-07-2018, 05:47 PM #4
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Default Re: What is the name of the tool I need?

bman87, that lens retainer looks to be quite a ways in the tube, be sure your spanner is long enough to reach.
An alternate option that may work, especially if the retainer is not too tight, or glued in place, is to use thin tipped needle nose pliers, or pointed style tweezers.

Good luck with your project!

PS - I just noticed that you're also located in Mi.
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Old 07-07-2018, 06:52 PM #5
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Default Re: What is the name of the tool I need?

snap ring pliers may also work.
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Old 07-07-2018, 06:54 PM #6
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Default Re: What is the name of the tool I need?

I have used those myself, they can work on some rings, if not too deep.
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Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions: - https://laserpointerforums.com/f37


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be ~very~ roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3
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Old 07-07-2018, 08:26 PM #7
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Default Re: What is the name of the tool I need?

Hi Yup snap ring pliers the straight type, buy a good pair they work wonders I use them on my mod builds. They give you plenty of torx, Be careful might be a left hand thread. the Chinese are good for doing the reverse that we do here in the states. if that won't work use a 3 LB. engineers hammer, just kidding good luck with your repairs.

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Old 07-07-2018, 09:26 PM #8
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Default Re: What is the name of the tool I need?

I have a Thor H dual power from laserpointerstore.com. It looks very similar to what you have here. Mine came with a three element lens and I wonder if yours might be too. If you are just planning on cleaning the outer surfaces of the lens, you can probably do that with a wooden shaft cotton swab dipped in 99% isopropanol w/v. No need to remove and then put it back in.
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Old 07-08-2018, 12:14 AM #9
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Default Re: What is the name of the tool I need?

Quote:
Originally Posted by paul1598419 View Post
I have a Thor H dual power from laserpointerstore.com. It looks very similar to what you have here. Mine came with a three element lens and I wonder if yours might be too. If you are just planning on cleaning the outer surfaces of the lens, you can probably do that with a wooden shaft cotton swab dipped in 99% isopropanol w/v. No need to remove and then put it back in.

Hi,Now thats good start without going through all the hassle ..

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Old 07-08-2018, 12:28 AM #10
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Default Re: What is the name of the tool I need?

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Originally Posted by bman87 View Post
Thank you very much!
Like Alaskan said: a lens spanner wrench.
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Old 07-08-2018, 12:30 AM #11
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Default Re: What is the name of the tool I need?

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Originally Posted by BowtieGuy View Post
An alternate option that may work, especially if the retainer is not too tight, or glued in place, is to use thin tipped needle nose pliers, or pointed style tweezers.
Those work well for this type of mounting, and are fairly universal since you can vary the distance between the tips easily so you don't need a tool that fix the product specifically.

There are tools to open the backs of watches that are pretty similar to this, but they will probably not fit into anything recessed like this.

Pliers/pincets can also be used, but they often don't have the flex strength to actually twist something unless it's not secured into place by any means.
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