copperastic - 26-3-2014 at 17:58
Hi, ive been researching if a 24/29 joint can fit into a 24/26 joint. I couldn't find any answers so can it? Thanks.
ParadoxChem126 - 26-3-2014 at 18:09
Yes, the 24 refers to the diameter of the joint at its largest point (in millimeters) and the other number refers to the length of the joint. The
taper is the same in all 24mm joints, they just have different lengths. For example, a 24/40 will fit into a 24/29, but it will extend slightly past
the joint.
Steam - 26-3-2014 at 18:15
If you are just starting to get into chemistry, it is important to pick a common joint size for all of your glassware, 24/40 is a good one because it
is the standard size in most American labs, plus it is available on ebay for good prices!
Zephyr - 26-3-2014 at 18:28
Why did you need to start a thread to find any answer to this simple question? Why not just Google it? On the Wikipedia article about ground glass
joints it says;
"The first number represents the outer diameter (OD) in millimeters (mm) at the base (widest part) of the inner joint. The second number represents
the ground glass length of the joint in millimeters."
Please do more research before starting a thread.
http://en.wikipedia.org/wiki/Ground_glass_joint#Conically_ta...
MyNameIsUnnecessarilyLong - 27-3-2014 at 00:27
Since all ST glass has a standard taper angle of 5 degrees, all you need to know is the max diameter to know if two pieces will mate or not. It's
important that the male joint is the same length or slightly shorter than the female joint if you want to use joint clips such as Kecks
copperastic - 27-3-2014 at 03:26
OK sorry I just didn't think to go to wiki. So should I get the distillation setup (its 55$) because the diamateter is 24 or is the length important
to?
TheChemiKid - 27-3-2014 at 07:09
I have received a sep funnel with a 24/26 joint, but it was not standard tapered. It would not work with either my 24/49 glassware or my 24/40
glassware, whereas the 24/49 and 24/40 worked fine together.
Chemosynthesis - 28-3-2014 at 18:00
I highly recommend getting pieces where both sizes, diameter and length, are congruent to avoid issues with leaking or sticking. The ideal is
definitely standard taper, with that little T symbol, then #/# all matching throughout any glassware not using an adapter to size.