Welding Tips and Tricks

Someone tell me about Pyrex gas cups...please..

Welcome to the forum.

Mikechallgren wrote:Someone tell me about Pyrex gas cups...please..

It's a gas lens kit with a clear cup...

Mike,
I'm not sure what you want to know but I'll let you know what I know. They're a type of gas lens in the general sense, they are large enough to offer good coverage on most metals with some oversized ones for specialty alloys. They can't take as much heat as alumina and probably the same amount as ceramic. They don't like to be banged around at all.

Their being clear is a great benefit, unless like me, you occasionally dip your tungsten and then they're less than clear from the smoke.

If there's something in particular you want to know you'll have to be less vague with your question.

Len

They melt at 500*

Mike wrote:Welcome to the forum.

Thank you, I look forward to the information...

gamble wrote:

Mikechallgren wrote:Someone tell me about Pyrex gas cups...please..

It's a gas lens kit with a clear cup...

Thank you!

Braehill wrote:Mike,
I'm not sure what you want to know but I'll let you know what I know. They're a type of gas lens in the general sense, they are large enough to offer good coverage on most metals with some oversized ones for specialty alloys. They can't take as much heat as alumina and probably the same amount as ceramic. They don't like to be banged around at all.

Their being clear is a great benefit, unless like me, you occasionally dip your tungsten and then they're less than clear from the smoke.

If there's something in particular you want to know you'll have to be less vague with your question.

Len

Thank you. I think I'd like to try it for the visibility aspect. Yes, I will probably 'smoke it up', but hopefully seeing the weld puddle will lessen that puddle 'leaping' up on my electrode...

gamble wrote:They melt at 500*

Thank you!...

gamble wrote:They melt at 500*

As long as you don't walk the cup you should be ok. Like everything else they have advantages and disadvantages. th

They have a place!

With a pyrex cup the stick out should be 5-6 times the diameter of the tungsten.
Also the Oring will melt at 500* as well.
And when using it on AC don't use more than 30% EN or it puts too much heat into the tungsten which heats up the glass

rahtreelimbs wrote:

gamble wrote:They melt at 500*

As long as you don't walk the cup you should be ok. Like everything else they have advantages and disadvantages. th

They have a place!

Thank you. Gathering data from you and others helps me in my quest to become a better welder, I appreciate your input!

gamble wrote:With a pyrex cup the stick out should be 5-6 times the diameter of the tungsten.
Also the Oring will melt at 500* as well.
And when using it on AC don't use more than 30% EN or it puts too much heat into the tungsten which heats up the glass

Thank you for your time and your input, I appreciate the information.

rahtreelimbs wrote:

gamble wrote:They melt at 500*

As long as you don't walk the cup you should be ok. Like everything else they have advantages and disadvantages. th

They have a place!

So as long as I use in and out I should be ok? How much stick out should my electrode have?

Thank you for your time an information,

5-6 times the diameter of the electrode. Just don't use it at 300amps and it will be fine.