Frequently asked questions.

Frequently asked questions.

What is a cemented carbide hot melt drill bit?

Hot melt drilling technology (Fdrill) is a chip-free processing technology for machining holes and bushes on thin metal sheet or tube, which completely replaces the process of welding (riveting) nuts on thin-walled workpieces. The hot melt drill is made of wear-resistant and high-temperature resistant cemented carbide material.
Application industry:

  • Automobile industry
  • Bicycle industry
  • Stainless steel furniture
  • Aerospace
  • Central heater

Hot melt drilling technology

When the tool and workpiece are in contact, high speed (1000~3500) and proper axial thrust (feed force) cause awesome friction between the drill and metal, reaching 650 centigrade instantly. °~ seven hundred and fifty ° The temperature of the temperature. The metal near the bit softens rapidly, and then axial pressure is applied to extrude the boss and bushing about three times the thickness of the initial plate on the upper and lower surfaces of the workpiece.

The whole process only takes 2-6 seconds. For the machining of smooth connecting surface or chamfering hole, plane drill can be used to cut the boss formed on the surface of the workpiece. The bushing can be used as bearing support, branch throat welding joint, etc., and can also be tapped for threaded connection. The thread is formed by rolling, and the processed thread can bear higher tension and torsion.

The chip-free drilling technology is suitable for processing ordinary steel, stainless steel, aluminum, copper, and other workpieces with ductility, as well as electroplated workpieces. It can be used for manual bench drill or CNC machine tools, the required power is 1.5 ~ 3.5kw, and the spindle speed is 1000 ~ 3500r / min. According to the different hole diameter, workpiece material and thickness, the selected cutting parameters are also different. Advantages: high efficiency, economy, saving materials, and the processed workpiece is more beautiful.

Advantages of hot melt drill

  • No chip, the thread can bear tension and torque
  • No chip processing, no need to remove the waste.
  • High forming precision on boss.
  • Suitable for various tapping machines.
  • High speed, long life and high production efficiency.
  • Suitable for a variety of hot-melt drilling materials.


Suitable for the following occasions:

  • Thread extension required
  • Multi layer heat exchanger
  • Bearing support
  • Screw connection of stainless steel building or metal furniture

Hot drill purchase guide

According to the thickness of the workpiece to be drilled, there are two length specifications of the hot drill:

  • Short drill: suitable for penetrating workpieces with thickness of 0.8mm-3mm.
  • Long drill: used for penetrating workpiece with thickness greater than 3mm – 12mm.

According to the surface requirements of the workpiece after penetration by the hot drill, there are two specifications of the hot drill:

  • Standard hot drill: the hot drill forms a convex ring on the surface of the workpiece while penetrating the workpiece to draw the forming bush.
  • Flat hot drill: the hot drill cuts off the convex ring on the surface of the workpiece when it penetrates the workpiece and stretches to form a bush, so that the surface of the workpiece is smooth.
  • For drilling stainless steel, the diameter of screw thread is M8 or above, the diameter of hot drill should be 0.1mm larger and the drilling speed should be reduced by 10-20%. For drilling non-ferrous metal, the drilling speed should be increased by 50%.