Overview of the T12 high-quality soldering iron tip set with black chrome plated soldering iron head

In a previous review, I mentioned a sad story aboutthe fact that when sending a metal handle for HAKKO T12 soldering tips for review, not all components were sent to me. So when sending the missing store manager, unobtrusively, offered me another 5 stings for the next review. If you want, you don’t want to, I had to agree, you need to assemble a pen

And so, here is an overview of high-qualityT12 soldering iron tips with black chrome plated soldering head. Let's see how high quality they are. Who cares (there will be photos, measurements, calibration, comparisons, offal) I ask for CAT
To begin with, let's figure out what the stakes of HAKKO T12 are.
The HAKKO T12 Tip is a monolithic design that combines a ceramic heating element, a temperature sensor, and an ultra-durable soldering head.

The basic principles for constructing such a sting are described in the patent US6054678. Anyone interested can see ...
From myself I’ll say that due to the lack ofair gaps in the tip head and the small heat capacity of the materials used, heat is instantly transferred from the heating element to the working surface of the tip head, and, accordingly, faster information is obtained on temperature reduction during thermal contact. As a result, the controller almost instantly increases the power of the heating element to 75W., Raises the temperature of the tip head to a preset value and then stabilizes it.
Quite often, the HAKKO T12 sting is also called a “cartridge”, which is not far from the truth.
A few words about the soldering head itself



Someone may ask, what is the meaning of blackcoatings of the tip of the soldering head? Chinese developers believe that the black chrome coating gives the tip of the soldering head additional corrosion resistance, as well as a more aesthetic appearance.
Main features of HAKKO T12 tips:
Power: up to 75W.
Maximum voltage: 24V
Operating temperature: up to 450 ° C
Thermal sensor: built-in thermocouple
Durability: 30-50 thousand rations.
HAKKO T12 Soldering Iron Tip Sizes
Length: ~ 150mm
Diameter: 5.5mm

The lineup of HAKKO T12 stings is large enough, more than 80 varieties. The full list of HAKKO T12 tips can be found on the official website HAKKO.
5 high qualityT12 soldering tips: T12-K, T12-KU, T12-ILS, T12-JL02, T12-BC2 with black chrome plated soldering head. Of course, I am far from thinking that these are original HAKKOs, but nevertheless, let's consider what arrived in the sent package.
Parcel - as usual, a gray package with delivery information

in a package a cardboard box without identification marks wrapped in tape

In the box there is a set of 5 stings and, already familiar, a plastic bubble with Chinese air

Sent kit stings

Consider the arrived kit in more detail
External inspection first


For all sent stings, the contacts look almost the same

No spot welding like the original HAKKO stings

Also on all stings of any engraving withmanufacturer's indication no. Strangely enough, most Chinese manufacturers are not shy about engraving HAKKO original symbols on their products

Someone may object that this is not original.HAKKO, because there is no engraving. And they will be right, the HAKKO firm does not release a tip with a black chrome plated soldering head. This is entirely the development of Chinese craftsmen.
I have similar stings in use with a black chrome-plated soldering tip from SUHAN, so there is an engraving on them

I bought on Tao back in 2017, in this the store. Now there are no such tips there, QUICKO sells similar tips with a black chrome plated soldering head under its own brand. Who cares can buy SUHAN tips here or here
For comparison, two stings T12-BC2, upper KSGER, lower SUHAN

Subjective visual comparison of these stings.showed that SUHAN tips, compared to KSGER tips, have a smoother and more uniform black chrome finish. Which of these stings will last longer I can’t say, time will tell.
Let's move on to the measurements
I use a PeakMeter MS8236 digital device for measurement, I checked the resistance of the measuring probes before measuring

As you can see, the probes should not make an error in the measurements.
Measurement Details


The measured values ​​of the resistances of the heating elements are summarized in a table.

For comparison, I added the measurement results of the tips SUHAN T12-BC2 and the original HAKKO T12-B2.
The tips were annealed at their soldering station at the set temperature of 330 ° C for ~ 5 minutes. I did not record the temperature, since the station was not calibrated for these stings.
As can be seen from the table, the resistance of the heating elements decreased slightly.
And judging by the magnitude of this resistance, the stings from the set provided for the review do not reach up to 70W of power.
We proceed to calibrate and test the performance of soldering tips
Calibration Workstation

The HAKKO FG-100 thermometer is not a panacea, I just have it, you can also use almost any multimeter with an external thermocouple.
The calibration process itself has already been described in the review, so I will not repeat it. I will provide only photos at calibration points
T12-K Tip

T12-KU Tip

T12-ILS Tip

Tip T12-JL02

Tip T12-BC2

T12-BC2 SUHAN Tip

T12-B2 HAKKO Tip

For clarity, I reduced the readings to a table, added a small calculation of the measurement error

All T12 stings sent turned out to be workers and at the moment seemed really high quality.
Well, for dessert, "offal"
I thought for a long time whether it was worth disassembling the sting ...
I decided that it is NECESSARY!
The most common T12-K sting will go under disassembly.
We remove the white cap and we see just awful contact welding

one contact generally hangs on “honest words”, with a flick of the wrist, it easily bends down

It’s not clear how this sting was generally calibrated ...
This is an isolated case or so all sent stings are arranged to check until I began ...
Breaking on. A slight pressure on the slip ring and its edges parted

here it is the lack of contact welding as in the original stings. But it’s easier to disassemble ;-).
Almost without much effort, he separated the contacts from the body of the sting

He drank a little dremel and the sting was dismantled

Here it is the soldering head

The part where the heating element is located has dimensions: diameter 5mm, length 15mm

As you can see, the heating element itself is quite compact.
A visual inspection of the soldering head showed that a black chrome coating is present on its entire surface.
The exit point of the contacts is coated with something in the form of gypsum, which easily crumbled from the touch of a hand

The contacts themselves are supposedly made of stainless wire, are not magnetized and very poorly soldered. To prevent contact closure inside the sting, they are wearing fluoroplastic tubes.
It was not possible to remove the heating element from the head; it was flooded with the same gypsum.
Stoch part of the metal from the surface of the soldering head

Cylinder itself, where is the heatingcopper element. The protective coating is very thin, it is understandable, this part of the soldering head is located inside the body of the soldering tip. But at the tip, the protective coating is already quite thick. To see where copper and where iron is already possible without the use of optical instruments. But there is copper in the tip and it pleases.
Let's sum up.
The stings left a double feeling ...
One side:
+ sting workers, suitable for soldering
+ tips can be calibrated, temperature measurement error within acceptable limits
+ there really is copper inside the tip of the soldering head
+ black chrome coating at least gives the stings a more aesthetic appearance, and at the very maximum provides additional corrosion resistance
On the other hand:
- contacts under the white cap do not deserve any criticism - they are terrible
- the contact rings are not fixed by contact welding, with a slight deformation, the connection may open
- the resistance of the heating element is higher than the prescribed 8 Ohms, and it follows that the sting power is underestimated
- price, such stings are expensive pleasure
Can I recommend these stings to anyone? Probably YES, calibrated easily, the wettability of the solder is good, you can solder.
But keep in mind that the contacts under the cap, at least you need to check, and as a maximum to modify independently to improve contact. The choice is yours.
That's all.
Thank you all for your attention, I am waiting for constructive criticism and comments.
PS I also want to report that from the provided set of soldering tips I only had T12-BC2 left.
T12-KU presented to a friend and mastermind review
T12-ILS gifted to a friend review
T12-JL02 presented to brother review
T12-K fell victim to the review
PSS at the request of members of the forum disassembled the soldering head completely

as far as the photo allows, you can see both the heating element and the thermocouple ball