Cant find Tips for Weller 8200N Gun. It has two nuts that resemble cap screws only with holes in the middle that accept the leads for the tips.

If this is the dual trigger Weller gun and your tips are held in place by either set screws or by locking nuts, Just loosen both of the parts that are holding the tip to the gun and then retighten them back up. Soldering iron tips that appear to be tight might not be and this will insure that the tip is indeed tight and also cleans up the connection of the tip to the soldering iron. Oxidation from heating and cooling will cause a tip to not get very hot. Loosen the tip holder and then retighten it. Hope this gets you going again.
Dennis

You might try getting new bolts that are the next size up. For example #6 x 32 to # 8 x 32. Just tap out the existing holes.

I am assuming that you installed a new tip. Note, the tip ends have to be 3/8 of an inch 90 degree bend so that when you insert the tip leads into the barrels, they go into the small holes in the barrels. Also note, the nuts to tighten the tip into the gun have to be installed onto the tip leads before bending the leads. Now when the tip is installed this way, the nuts tighten and hold the tip in the barrel. This tightening of the nuts allow the tip to have a good electrical connection to the barrels and this is what allows the tip to heat. You actually have an electrical current that passes through the barrels and the tip. It is a very low voltage (around 2) but a very high current. Over time the tip will not heat, this is a sign to either tighten the nuts, or look at the tip to see if it has a break in it. If it has an open, then it is time to change the tip.

Hello, just loosen the set screws on the end of the soldering gun barrels. Install new tips and tighten the set screw--sung! If your soldering iron requires that the tips have a 90 degree angle on their ends. You can bend them but be very careful because you can break them end off. The tipes are made of copper with some other alloys and the are kinda brittle. You can do. GB...stewbison

There should be two nuts (ldome shaped nuts) on the end of the tubes that have the holes in them where you are installing the tips. They need to be tightened with the wrench that is supplied with the gun. Let me know if this helps. Thanks

HERE their is a collar that slips over the tip holder theirs screws that go through the holes on the tips that secure the melting tip hope this helps

The tip screws are a drilled bolt for this unit. There isn't room to tap the barrel holes out further if the threads are bad. You used to be able to buy tips that were pre-loaded with the proper clamp bolts. Good luck!

Sears Hardware carries Weller and and has tips for the 8200 Weller Soldering Gun, I just swa them yesterday at Sears Hardware.

Make sure the tip is tightened fully, use a 5/16 wrench to snug it down.

Heat gun tips often get bad electrical connection where the nuts tighten to the tip ends. Remove the tip, clean the ends, re-install the tip, making sure the nuts TIGHTEN onto the tip ends. Your problem is common and always caused by a poor connection at the tip ends/nuts.