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Hand Tap M25X1.5 DIN 2181/2 6H HSS
13216
Thread size: M25x1,5172 sizes of this tap
M1x0,2M1,2x0,2M1,4x0,2M1,6x0,2M1,7x0,2M1,8x0,2M2x0,25M2,2x0,25M2,2x0,35M2,3x0,25M2,3x0,35M2,5x0,35M3x0,35M3,5x0,35M4x0,5M4,5x0,5M5x0,5M5,5x0,5M6x0,5M6x0,75M7x0,5M7x0,75M8x0,5M8x0,75M8x1M9x0,5M9x0,75M9x1M10x0,5M10x0,75M10x1M10x1,25M11x0,75M11x1M11x1,25M12x0,5M12x0,75M12x1M12x1,25M12x1,5M13x1M13x1,25M14x0,75M14x1M14x1,25M14x1,5M15x1M15x1,5M16x0,75M16x1M16x1,25M16x1,5M17x1M17x1,5M17x2M18x0,75M18x1M18x1,25M18x1,5M18x2M19x1M19x1,5M20x0,75M20x1M20x1,25M20x1,5M20x2M21x1,5M22x1M22x1,25M22x1,5M22x1,75M22x2M24x1M24x1,5M24x2M25x1M25x1,5M25x2M26x1M26x1,25M26x1,5M26x2M27x1M27x1,5M27x2M28x1M28x1,5M28x2M30x1M30x1,5M30x2M30x2,5M30x3M32x1,5M32x2M32x3M33x1,5M33x2M33x3M34x1,5M34x2M35x1,5M36x1M36x1,5M36x2M36x3M38x1,5M38x2M38x3M39x1M39x1,5M39x2M39x3M40x1,5M40x2M40x3M42x1,5M42x2M42x3M42x4M45x1,5M45x2M45x3M45x4M46x1,5M46x2M48x1,5M48x2M48x3M48x4M50x1,5M50x2M50x3M52x1M52x1,5M52x2M52x3M52x4M55x2M55x3M56x1,5M56x2M56x3M56x4M58x2M58x4M60x1,5M60x2M60x3M62x1,5M62x2M62x3M62x4M64z1,5M64x2M65x2M65x4M68x1,5M68x2M68x3M68x4M70x1,5M70x2M72x1,5M72x4M75x1,5M75x2M76x1,5M80x1,5M85x2M90x2
€51.79 tax inc.
Net price: €42.11
Description
Technical data for the M25x1.5 hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M25 |
| Thread pitch P mm | 1.5 mm |
| Overall length l1 | 90 mm |
| Flute length l2 | 22 mm |
| Shank diameter d2 | 18 mm |
| Square drive size a | 14.5 mm |
| Tap drill diameter | 23.5 mm |
| Thread angle G | 60° |
| Tap tolerance | ISO2 6H |
Roughing tap and finishing tap – how much material each removes
Division of work in the 1–2 set
The M25x1.5 thread is cut into the wall of a hole with a diameter of 23.5 mm. The thread groove extends 0.75 mm into the wall. A single tap would have to cut the entire groove at once, requiring substantial hand torque and risking breakage. The set divides this work into two passes.
The drawing shows the entire set in operation. Both taps have the same shank and the same length. They differ in their chamfer, the tapered tip: No. 1 has a chamfer spanning 8 threads, while No. 2 spans only 2 threads. The detail windows at the hole wall show how the thread groove deepens after each tap.
| Tap | Chamfer | Chamfer angle | Material removed | How it works in the hole |
|---|---|---|---|---|
| No. 1 – roughing tap | long, 8 threads | 5° | the main portion of the groove | enters smoothly and establishes thread alignment |
| No. 2 – finishing tap | short, 2 threads | 20° | the remainder, to the full profile | follows the cut threads and produces the full 6H profile |
How to distinguish the taps in the set
The chamfer on No. 1 is 4 times as long as the chamfer on No. 2 — the difference is immediately visible when you place them side by side. No. 1 has an incomplete thread profile; only No. 2 has the full profile. The number is also indicated on the shank: No. 1 has one ring, No. 2 has none. Keep the set together and always start with the roughing tap.
How to tap an M25x1.5 hole – sequence 1, 2
Hand tapping step by step
Thread M25x1.5 in four steps
ØDrilling
Drill bit 23.5 mm
1Roughing tap
Chamfer 8 threads
2Finishing tap
Chamfer 2 threads
✓Finished thread
Tolerance 6H
Turning sequence: half a turn clockwise, a quarter turn counterclockwise | Between taps: remove chips from the hole
Start with the hole. The drill diameter is easy to calculate: thread diameter 25 mm minus pitch 1.5 mm gives 23.5 mm. An undersized hole is a common cause of a tap twisting off in the workpiece.
Through hole or blind hole – how deep to drill
The set taps both types of holes. In a through hole, the thread extends through the full material thickness. In a blind hole, cut the thread to 62.5 mm, or 2.5 times the thread diameter (2.5 x 25 mm, shown as 2.5D in the drawing). Drill the hole deeper than the thread. The finishing tap has a chamfer spanning 2 threads, so approx. 2 incomplete threads remain near the bottom. The extra depth below the thread accommodates them along with the chips.
No. 1 – the roughing tap establishes thread alignment
Fit the roughing tap in the tap wrench and position it perpendicular to the surface. Check the angle from two sides, for example with a square. Turn half a turn clockwise, then a quarter turn counterclockwise. Reversing breaks the chip into short pieces – a slight crunch is normal. The first threads determine whether the thread will be straight.
No. 2 – the finishing tap produces the full profile
Back out the roughing tap and remove chips from the hole. Screw the finishing tap into the cut threads by hand – it should engage them on its own. Continue turning at the same rhythm as with the roughing tap. The finishing tap removes the remaining material and cuts the groove to the full profile within tolerance 6H. When it screws in smoothly all the way, the thread is complete – check it with an M25x1.5 screw.
M25x1.5 fine-thread hand taps
Hand Tap M25x1.5 DIN 2181/2 6H HSS is a precision set designed for cutting M25 fine threads in structural steels, stainless steels and nonferrous metals. In workshop practice, high repeatability and surface quality are provided by M25x1.5 Hand Tap Set, enabling steady guidance and full control over the cutting process.
Technical data: nominal diameter 25 mm, pitch 1.5 mm, sixty° profile per ISO 68-1, internal thread tolerance 6H in accordance with ISO 965, right-hand thread. Straight flutes ensure controlled chip evacuation, while ground high-speed steel (HSS) guarantees long service life and resistance to microchipping. The two-tap arrangement conforming to DIN 2181/2 — starter tap (I) and finishing tap (II) — enables even torque distribution and maintains axial alignment. In workshop practice, exceptional ease of use and process repeatability are offered by M25x1.5 Hand Tap Set, which organizes the working sequence and tool selection.
- Precise guidance — dividing tapping into two stages reduces the risk of jamming and guarantees an even, clean thread profile.
- High durability — ground high-speed steel (HSS) maintains cutting edge sharpness even during extended use.
- Fit accuracy — tolerance class 6H ensures an ideal fit with 6g threaded components.
- Repeatable results — consistent operation of both taps facilitates control and maintains high machining quality.
Reference to DIN 2181/2 (manufacture), ISO 68-1 (metric profile) and ISO 965 (6H tolerance) guarantees full compatibility with inspection instruments. Careful design and precision grinding of the high-speed steel ensure dimensional repeatability, tool durability and smooth operation in one-off and small-batch cycles.
Stages of cutting an M25x1.5 thread with a 2-piece set: roughing tap and finishing tap
Frequently asked questions
The set includes two taps: a roughing tap and a finishing tap, used in sequence.
Yes, the set can be used in through holes and blind holes.
The tap performs well in low-carbon steel, aluminum, brass, and other materials with good machinability.
Product accessories
Metal drill bit 23.5 NWKc HSS DIN 345 Baildon
Reference: 0380 In stock > 10 items
€22.37
€27.51 brutto
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| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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