# How can I tell if a solder sucker is good?

#### rambomhtri

Joined Nov 9, 2015
317

#### ian field

Joined Oct 27, 2012
6,539
I've replaced the second solder sucker by the actual one I ordered. Yeah, the best way is to test is to use it to suck actual solder, but I'm not working on anything right now. I wouldn't like neither to dirty the sucker I may be have to send back.
So... shouldn't it have enough force to support itself if you release the plunger with your finger over the tip?
The PTFE nozzle will form to the way you use it - so the way it lifts solder will improve with use.

They usually have an O-ring on the piston - a light smear of silicone grease helps.

Don't use any hydrocarbon lubricant - any ABS plastics in the construction will disintegrate!

#### rambomhtri

Joined Nov 9, 2015
317
I'm sending it back, and I got to wait again like 10 days

OK, I've released the plunge with the tip covered by my finger, it stops like at half of the way, but then it starts slowly, like doing little jumps, to recover to its original position. That is not normal, right?

As long as I keep covering the hole so no air can enter to the cylinder, it should stay in the same position, right?

#### ian field

Joined Oct 27, 2012
6,539
I'm sending it back, and I got to wait again like 10 days

OK, I've released the plunge with the tip covered by my finger, it stops like at half of the way, but then it starts slowly, like doing little jumps, to recover to its original position. That is not normal, right?

As long as I keep covering the hole so no air can enter to the cylinder, it should stay in the same position, right?
They're never perfect - that should lift solder quite adequately.

Its not just the nozzle that wears in with use, its like a new car engine - you have to run it in before you start thrashing it.