What size tube stock for 510 connector?

[Verb]

I plan on making some 510 connectors from scratch by tapping some stainless steal tube stock. What size I.D. is best to start with before cutting it to 7mm with the tap?

I tried the search feature here, but no luck. I found a chart elsewhere online recommending 6.1mm opening for 7mmx1mm threads. Seems like a bit much to cut for .5mm pitch and with using stainless steel.

Any recommendations for a high quality tap in 7mmx.5mm? Lots of finds on economic taps, but with stainless steel, I'd rather go with something a bit better.

thank you

 

[twgbonehead]

OK, I'll bite.

Why on earth would you try to make something like that by hand, when you can get well-made ones and adapt them very cheaply?

 

[stevegmu]

Yesterday someone started a thread and posted a diagram of their 510 design. Just do like the Chinese and copy his design...

 

[gandymarsh]

These are very popular here 510 Connector - Self-adjusting Spring Loaded Center Pin - 14mm & 22mm I just bought two and they seem to be well designed.

 

[Verb]

I'm building a squonk box mod. I've worked pretty hard on the design and have sourced most of the materials. Well, I though I sourced all of them and then remember the reduction in size when stock is threaded. I'd also need to know what diameter rod (delrin, peek, or ptfe) to start with before I use the die to cut 7mmx.5mm threads on the outside of that.

Wood box
All mechanical (no solder joints)
And the kicker, an adjustable center pin
Contacts and wiring done with 20mil copper strip, except for the feed tube/center pin and 510 threads in stainless.

I am very happy with the high current switch and adjustable center pin I designed. I don't know of a bottom feeder with an adjustable center pin.


My wife will cut and router the boxes. I will handle the electric and machining.

In order to pull off the adjustable center pin, I need a half inch long piece of stainless steel tubing with 7mmx.5mm threads. We plan on making a handful of prototypes and field testing the design. If all works out, maybe small scale production. I'd have a machine shop cut the parts for me if I needed 50 or more. For prototyping I'd figured I'd machine them myself so I could make design adjustment as things progress.

Also, I don't like brass or copper threads. All the off the shelf options, I know of that will bottom feed, are brass.

 

[fishj]

I thought the thread was about "tube socks." Sorry.

 

[Verb]

These are very popular here 510 Connector - Self-adjusting Spring Loaded Center Pin - 14mm & 22mm I just bought two and they seem to be well designed.

Very nice. Can you bottom feed through these?

Also I'd prefer not to use solder. My skills are adequate, just trying to produce a design without it to reduce the chance of failure.

 

[Verb]

I thought the thread was about "tube socks." Sorry.

Tube socks use a different kind of threading.

 

[Maurice Pudlo]

http://www.e-cigarette-forum.com/fo...ible-solution-connecting-510-atomisers-2.html

Folks have been there once at least.

To determine the correct metric drill bit to go with taps, subtract the pitch from the diameter of the tap.

For example: For a 901 Connector, the tap size is 8mm in diameter by .75 pitch. 8 - .75 = 7.25. So you will need to drill a 7.25mm diameter hole before running your tap through.

From the slowtech forum.

Maurice

 

[Verb]

http://www.e-cigarette-forum.com/fo...ible-solution-connecting-510-atomisers-2.html

Folks have been there once at least.



From the slowtech forum.

Maurice

You rock! Thank you.

 

[zoiDman]

I plan on making some 510 connectors from scratch by tapping some stainless steal tube stock. What size I.D. is best to start with before cutting it to 7mm with the tap?

...

Why don't you Mic the ID of a 510 Connector and then Compare what you have to this Chart?

https://littlemachineshop.com/Reference/TapDrillSizes.pdf

As to a Tap. M42 Cobalt Taps will cut Most Stainless Steels. Especialy if you just have a Few Threads to do. A Carbide Tap will last longer. And is Needed with some of the Tougher Alloys. But they are also kinda Pricey for a Hobbiest. What alloy of Stainless are you planning on using? A 4xx series perhaps?

As to Tap Geometry. There are 3 Basic Types.

You are Probably going to want to go with a Bottom Tap for a Shallow Blind Hole.

 

[gandymarsh]

Very nice. Can you bottom feed through these?

Also I'd prefer not to use solder. My skills are adequate, just trying to produce a design without it to reduce the chance of failure.

I understand what you are trying to accomplish now. I hope things go well but it seems that it will be very challenging. 510 connectors are very small, I guess it's because they were probably designed for cig-alikes.

The connectors I linked to have a solid brass spring loaded center pin that floats inside a delrin insulator. It doesn't protrude out of bottom of the connector. The idea is to solder a wire to the pin after inserting the wire through the spring retaining collar. Then the collar is threaded on to the delrin insulator. I suppose you could machine a longer pin and drill a hole through the center but you would need to drill out the spring retaining collar so the pin can protrude through it. I hope I explained that clearly enough.

This thread may be of interest

http://www.e-cigarette-forum.com/forum/modding-forum/560010-printed-dna30-bottom-feeder.html

 

[Verb]

Why don't you Mic the ID of a 510 Connector and then Compare what you have to this Chart?

https://littlemachineshop.com/Reference/TapDrillSizes.pdf

As to a Tap. M42 Cobalt Taps will cut Most Stainless Steels. Especialy if you just have a Few Threads to do. A Carbide Tap will last longer. And is Needed with some of the Tougher Alloys. But they are also kinda Pricey for a Hobbiest. What alloy of Stainless are you planning on using? A 4xx series perhaps?

As to Tap Geometry. There are 3 Basic Types.

You are Probably going to want to go with a Bottom Tap for a Shallow Blind Hole.

316 or 316L

It will be a through hole tap as the threads will also be used by the adjustable center pin from the bottom. Which geometry would be best to cut threads inside a 1/2 inch long tube?

 

[zoiDman]

316 or 316L

It will be a through hole tap as the threads will also be used by the adjustable center pin from the bottom. Which geometry would be best to cut threads inside a 1/2 inch long tube?

I believe that 316L is a Lower Carbon SS that 316. So it should be a Little Easier to Machine & Tap.

For Thru Holes, I like to use Plug Tap because it Starts Easier. And Doesn't need as Large of a Chamfer on the Hole to make a Starter Thread.

Basic Rule of Thumb for Tapping.

Thru Holes = Plug Tap

Blind Holes = Start with Plug Tap. Finish with Bottoming Tap. (if possible)

Are you going to be Doing the Tapping on a Lathe or a Mill or a Drill Press?

 

[Verb]

Drill press or by hand. Not sure if it's possible by hand.

 

[stevegmu]

Here's the design you can steal, I mean clone...

http://www.e-cigarette-forum.com/forum/new-members-forum/594599-fat-daddy-510-connection.html

 

[zoiDman]

Drill press or by hand. Not sure if it's possible by hand.

Hand Tapping something like this Isn't Really an Option.

When Using a Drill Press, you should ALWAYS use one of these to get the Tread Started.

http://www.amazon.com/Triton-Industrial-Precision-Spring-Loaded/dp/B004MSJBXS

So when you go to buy a Tap, make sure the Tape has a Hole in the Shank on the Tap Handle End.

 

[classwife]

moved down into the Modding Forum from Battery Mods

 

[Verb]

Hand Tapping something like this Isn't Really an Option.

When Using a Drill Press, you should ALWAYS use one of these to get the Tread Started.

Triton Industrial Precision Spring Loaded Tap Guide - Spring Loaded Center Milling - Amazon.com

So when you go to buy a Tap, make sure the Tape has a Hole in the Shank on the Tap Handle End.

I have some education to gain. Should be fun. Thank you for sharing so much high quality knowledge. Truly appreciated.

 

[zoiDman]

I have some education to gain. Should be fun. Thank you for sharing so much high quality knowledge. Truly appreciated.

Machining involves many "Tricks" and Techniques. And Many Specially Tools.

Here is another Hot Tip. Use a Cutting Fluid instead of an Oil. This stuff works Great.

But be aware that a Cutting Fluid like this Can Contain some Very Hazardous Chemicals. And you have to Wear Gloves and Eye Protections when Using it.