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Description
Technical data for the M5 left-hand machine tap
| Technical data | |
|---|---|
| Nominal Diameter D1 | M5 LH |
| Helix Angle | 35° |
| Thread Pitch P | 0.8 mm |
| Overall Length L1 | 70 mm |
| Flute Length L2 | 8 mm |
| Shank Diameter D2 | 6 mm |
| Square Drive Size A | 4.9 mm |
| Tap Drill Diameter | 4.2 mm |
| Chamfer | C (2÷3) P |
| Length l3 | 25 mm |
How a spiral flute tap evacuates chips from a blind hole
The 35° flute works like a screw conveyor
The flutes of this tap follow a left-hand helix at an angle of 35° to the axis. The tap rotates counterclockwise and advances into the hole. The chip cut by the chamfer enters the flute, and the helix feeds it upward like the auger in a meat grinder. The bottom of the hole stays clean, and the cutting edges do not encounter packed chips. The M5 x0.8 tap has a reinforced shank according to DIN 371: diameter 6 mm, square size 4.9 mm.
1
The 35° spiral flute carries chips upward from the chamfer.
2
The stepped chip exits the hole and breaks into short pieces.
3
The tap rotates counterclockwise – this is how it cuts a left-hand thread.
4
Chamfer C: 2–3 incomplete threads on the tapered lead.
5
Clearance below the tap tip – min. 2 thread pitches above the bottom.
6
Feed 0.8 mm/rev, equal to the pitch of the M5 x0.8 thread.
M5 left-hand spiral flute machine tap for blind holes
M5 left-hand machine tap is an advanced cutting tool for producing internal threads with a diameter of 5 mm in blind and through holes. Made from cobalt-enriched HSSE high-speed steel, it offers exceptional wear resistance when machining steel, aluminum, and cast iron. The R40 spiral flute ensures reliable forward chip evacuation, preventing material from jamming in the hole.
Main advantages of the M5 left-hand spiral flute machine tap
- R40 spiral flute with a left-hand helix — automatic chip evacuation out of the hole, particularly effective in blind holes
- Type C chamfer with 2-3 cutting threads — enables a complete thread to be cut in a single pass without repeated entry
- Cobalt-enriched HSSE alloy — withstands operating temperatures up to 600° and intensive use
- Dual-purpose design — designed for blind holes, equally effective in through-hole applications
- ISO 2 accuracy grade (6H) — guarantees M5 left-hand thread dimensions that meet stringent industrial standards
This M5 left-hand tap is valued in the automotive and machinery industries for its stable operation and long service life. It handles metals with strengths up to 1000 MPa. Intended for use on CNC machine tools and conventional machines. Choose a proven solution — get a tool that supports your production efficiency.
Frequently asked questions
A drill bit with a diameter of 4.2 mm is used to drill the hole for an M5 left-hand thread with a pitch of 0.8 mm. After drilling, chamfering the entry edge at a 120° angle to a depth of 0.6 mm is recommended to minimize resistance when inserting the tap and protect the initial threads from damage.
The M5 left-hand tap with an R40 spiral flute is a multipurpose tool suitable for tapping both blind and through holes. The left-hand flute helix forces chips upward, which is crucial for bottomless holes but also works well in through holes.
The M5 left-hand tap made from cobalt-containing HSSE handles a wide range of materials — carbon and tool steels up to 1000 MPa, corrosion-resistant steels, gray and ductile cast iron, aluminum alloys, and nonferrous metals such as brass and bronze. The cobalt content provides extended service life when machining hard materials.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| 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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