5-Piece 900M Pure Copper Soldering Iron Tip Set (T-I, T-B, T-K, T-2.4D, T-3C)

Specifications

• Series: 900M-T

• Material: Pure Copper (Unplated)

• Profiles Included: T-I, T-B, T-K, T-2.4D, T-3C

• Total Length: 43mm (26mm base + 17mm tip)

• Outer Diameter: 6.0mm

• Inner Diameter: 4.0mm

• Magnetic: No (Pure Copper)

Key Applications and Projects

• Advanced SMD Rework: Utilizing the needle-sharp T-I tip to expertly solder microscopic 0402 or 0603 surface mount resistors under a microscope.

• Drag Soldering: Using the T-3C Bevel tip to hold a small reservoir of flux and solder, allowing you to drag it across the pins of a QFP microcontroller to solder 40 pins in a matter of seconds.

• Heavy Ground Plane Connections: Employing the large T-K Knife tip to pump massive amounts of heat into thick copper ground planes or heavy-gauge wires without the iron losing its temperature.

Unlock New Capabilities (Project Evolution)

• Master Low-Temperature Soldering: By using pure copper instead of iron-plated tips, you unlock vastly superior thermal conductivity. This allows you to lower the temperature on your soldering station (e.g., from 380°C down to 320°C) while still getting perfect joints, drastically reducing the risk of lifting delicate copper pads off your circuit boards during complex repairs.

Package Includes:

• 1 x T-I Pure Copper Tip (0.5mm Point)

• 1 x T-B Pure Copper Tip (1.2mm Conical)

• 1 x T-K Pure Copper Tip (5.0mm Knife)

• 1 x T-2.4D Pure Copper Tip (2.4mm Chisel)

• 1 x T-3C Pure Copper Tip (3.0mm Bevel)

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What soldering irons are these compatible with? They fit any soldering iron that uses the 900M standard. This includes the Hakko 936, Yihua 936, Quick 936, standard generic 60W adjustable pencil irons, and many others.

2. Why use pure copper instead of standard silver/black tips? Standard tips are iron-plated for durability. Pure copper has vastly superior thermal conductivity, meaning it heats up faster, recovers heat instantly on large joints, and allows you to solder at lower, safer temperatures.

3. Do pure copper tips wear out faster? Yes. Without the hard iron plating, the tin in your solder will slowly dissolve the copper over time (a process called pitting). They are considered high-performance consumables.

4. How do I prevent them from turning black and oxidizing? You must keep them "tinned." Never leave the tip hot and dry. Always apply a generous blob of solder to the tip before resting it in the stand.

5. Can I use a wet sponge to clean these? It is highly discouraged. The thermal shock of a wet sponge degrades bare copper quickly. Use a coiled brass wire sponge to gently wipe excess solder away.

6. What is the T-K (Knife) tip used for? The 5mm wide knife tip is incredibly versatile. You can use the sharp edge to fix solder bridges between pins, or lay the flat side against thick ground planes to transfer massive amounts of heat.

7. Which tip should I use for tiny SMD resistors? The T-I (0.5mm fine point) is specifically designed for precision work on tiny surface mount components and dense circuit boards.

8. What is the T-3C tip for? The T-3C is a 3mm bevel (angled cylinder). The flat angled face holds a nice pool of liquid solder, making it the premier choice for "drag soldering" the pins of large microcontroller chips.

9. What are the dimensions of the base? The hollow base that slides over your heating element is 26mm long, with an inner diameter of 4.0mm and an outer diameter of 6.0mm.

10. Can I use lead-free solder with these? Yes, but lead-free solder requires higher temperatures and is much more aggressive on bare copper. Your tips will pit and wear out significantly faster than if you use 63/37 leaded solder.

11. Are these tips magnetic? No. Because they are 100% pure copper, they will not stick to a magnet. If a tip sticks to a magnet, it has an iron/steel core.

12. Will these fit a Weller soldering station? Usually, no. Weller typically uses their own proprietary tip series (like the ET or PT series), not the 900M standard.

13. How do I restore a heavily oxidized copper tip? If the tip turns black and won't melt solder, dip it into a commercial "Tip Tinner" (a mixture of aggressive acid flux and tin powder) while hot, then immediately wipe it on a brass sponge and apply fresh solder.

14. What does the "2.4D" mean? The "D" denotes a chisel shape, and the "2.4" means the flat edge of the chisel is exactly 2.4 millimeters wide.

15. Can I file or sand these tips if they get pitted? Unlike plated tips (which you should never sand), you actually can use very fine sandpaper to reshape or clean a badly pitted pure copper tip, though it will change the geometry slightly.

16. Why does copper transfer heat better? Copper is one of the most thermally conductive metals available for tooling. It lacks the resistance of the iron boundary layer found on plated tips, minimizing the temperature drop between the heater core and the solder joint.

17. What wattage iron works best with these tips? They are designed for standard 60W to 75W stations (like the 936 series). Because they are so efficient, you will notice a significant performance boost even on lower-wattage generic pencil irons.

18. Can I use the chisel tip (T-2.4D) for through-hole components? Absolutely. The T-2.4D provides an excellent contact patch against component legs and via pads, making it ideal for standard through-hole soldering.

19. How tight should the retaining sleeve be? Hand-tighten the metal retaining nut that holds the tip onto your iron. Over-tightening it can crack the fragile ceramic heating element hidden inside the hollow base of the tip.

20. Will these tips bend if I press too hard? Pure copper is softer than iron-plated steel. If you apply excessive physical force (especially to the long, thin T-I point), it can bend or deform. Let the heat do the work, not physical pressure.