High-speed steel metric thread tap, straight flute tapping tool, hand tap M20x2.5 2 pieces

Features:1. High-quality material: Metric taps are made of high-quality high-speed steel, offering high hardness, high toughness, wear resistance, and durability.
2. Excellent design: Standard metric thread design, clear and tidy, allows for rapid chip removal for efficient, sharp, and durable threading.
3. Application: Straight flute taps are used for tapping through holes. The appropriate addition of coolant (e.g., water) can extend their service life during tapping.
4. Convenient: Adjustable forward and backward, ratchet rotation, lightweight, compact, and convenient to use, saving you time and energy.
5. Wide Application: The metric thread tap is suitable for most metals, iron plates, copper, alloy steel, abrasive steel, A3 steel, stainless steel, etc.
Specifications:Item Type: Straight Flute Tap
Material: High-Speed ​​Steel
System: Metric
Number of Threads: 4
Thread Tolerance Grade: 0.014
Through Hole/Blind Hole: Through Hole
Tap Style: Straight Flute
Thread Code: Standard Thread
Application: Suitable for thick steel, rubber, aluminum, copper, and wood.
Usage: One set of products consists of 2 pieces, which can also be divided into a head cone and two flutes.Tap function: There is a tapered section on the front of the tap, which is smooth without thread (very shallow), so as to facilitate "alignment" between the tap and the tap hole and ensure the circularity of the tap and the hole for smooth tapping. Function of the second cone: in addition to machining the excess thickness of the head cone to meet the standard, it also plays the role of polishing the screw thread (deburring). For thread with "blind hole", it can be "tapped down". Simply, we can say that the head cone is rough machining and the second cone is fine machining.
The workpiece must be Clamped properly. Generally, the side of the part that is to be tapped should be placed in a horizontal or vertical position. In this way, when tapping, it is easier to judge and maintain the direction of the tap perpendicular to the base of the workpiece thread. .When you start tapping, place the tap as far as possible, then press the direction of the tap shaft with one hand and gently rotate the hinge with the other hand. Screw. When the tap turns 1-2 turns, observe whether the tap is perpendicular to the base surface of the workpiece thread from the front or side. If necessary, use a square to correct it. Generally, the direction of the tap is basically determined after tapping 3 to 4 turns of thread. If the tapping is not correct, unscrew the tap, correct it with two taps, then tap the thread with a head tap. When all the cutting parts of the tap are inserted when entering the workpiece, it is no longer necessary to apply axial force and it can be screwed naturally by the thread. When tapping the thread, the tap should not be screwed too much with each rotation of the hinge screw.Generally, it is appropriate to screw in 1/2 to 1 turn at a time, and taps below M5 should not be screwed in more than 1/2 turn at a time; when tapping fine threads or threads with high precision requirements, the feed rate should be reduced appropriately at each stage; the tapping speed for cast iron can be suitably faster than that for tapping steel.After each screwing action, it is about to rotate back half its stroke. When tapping deeper threads, the rotation stroke is greater and it must be screwed back and forth several times. This can break up the chips, facilitate chip removal, and reduce chip sticking to the cutting edge, thus maintaining a sharp edge. At the same time, the cutting fluid can smoothly penetrate the cutting part and act as cold lubrication. When rotating the hinge bar, the force of the operator's two hands must be balanced, and excessive force and left-right jerking should be avoided, otherwise it is easy to tear the thread profile and cause expansion and tapering of the threaded hole. Package List: 2 x Straight Flute Taps, 1 x Storage Box