- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Description
Material HSSE
Thread size M30
ChamferB (3.5–5.5) threads
Standard DIN 376
Technical data for the M30 left-hand machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M30 |
| Thread Pitch P | 3.5 mm |
| Overall Length l1 | 180 mm |
| Flute Length l2 | 45 mm |
| Shank Diameter d2 | 22 mm |
| Square Drive Size a | 18 mm |
| Tap Drill Diameter | 26.5 mm |
| Chamfer | B (3.5÷5.5) P |
| Thread tolerance | 6H |
How the type B through-hole chamfer pushes chips down the hole
Chips exit at the bottom instead of returning through the thread
The type B through-hole chamfer has a chip breaker at the tip of the tap – an angled notch in the cutting edges. The chip breaker directs chips down the hole, ahead of the tap tip. The chips curl into a spring shape, break into short pieces and exit the hole on the other side of the workpiece. The threads already cut remain clean because the chips do not pass through them on their way up. The M30 x3.5 tap has a reduced shank to DIN 376: diameter 22 mm, square size 18 mm.
1
Straight flute – chips do not enter it; the flute carries lubricant to the cutting edges.
2
The chip breaker at the tip of the tap directs chips down the hole.
3
The tap rotates counterclockwise – this is how it cuts a left-hand thread.
4
B chamfer: 3.5–5.5 incomplete threads on the entry taper.
5
The chips break into segments: individual pieces at the top of the hole, with progressively more farther down. They fall out below the workpiece.
6
Feed 3.5 mm/rev, equal to the pitch of the M30 x3.5 thread.
M30 left-hand machine tap for through holes – HSSE for rotating components
The M30 left-hand machine tap for through holes is a specialized tool for cutting large-diameter left-hand internal threads of 30 mm in components rotating clockwise. HSSE high-speed steel construction with 5% added cobalt ensures a hardness of 65-67 HRC and optimum tool life when machining difficult-to-machine materials. The large-diameter M30 left-hand thread is used in drive shafts, machine tool spindles, and adjustment mechanisms requiring protection against self-loosening during operation under load.
Key features of the M30 left-hand machine tap for through holes
- Left-hand thread direction (LH) used in components rotating clockwise where a right-hand thread could loosen on its own under torque
- Long shank to DIN 376 provides greater clamping rigidity and better tool guidance, which is essential when tapping large diameters
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, essential for machining alloy steels
- Tolerance 6H according to DIN 376 ensures accurate left-hand threads and full interchangeability with left-hand threaded fasteners
- Compatibility with ER40 holders and tapping chucks with axial compensation for CNC machining centers
- Metric pitch of 3.5 mm complies with DIN 13, recommended tap drill diameter of 26.5 mm for a full left-hand thread profile
The M30 left-hand machine tap is used in the machinery industry to manufacture drive shafts, machine tool spindles, and rotating components requiring protection against self-loosening. M30 left-hand threads are found in tensioners, turnbuckles, and large adjustment mechanisms. Cooling with an emulsion containing EP additives at a concentration of 8-10% is recommended.
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 53-212 | 186-742 |
| MStainless steel | 5-10 | 53-106 | 186-371 |
| KCast iron | 5-15 | 53-159 | 186-556 |
| NAluminum | 10-25 | 106-265 | 371-928 |
Thread preparation M30 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 26.5 mm
3 Tapping
M30
✓ Done!
Tolerance 6H
Standard: DIN 376 | Chamfer: B (straight) | Application: through holes
Tolerance 6H — metric thread tolerance classes
| Class | Accuracy | Application | Status |
|---|---|---|---|
| 4H / 4g | High | Precision connections, hydraulics | — |
| 6H / 6g | Standard | Machine building, general-purpose | SELECTED |
| 7H / 8g | Low | Large clearance, easy assembly | — |
6H = internal thread (nut, hole) | 6g = external thread (screw)
Frequently asked questions
The M30 left-hand thread is used in drive shafts, machine tool spindles, tensioners, turnbuckles, and wherever a component rotates clockwise and protection against self-loosening is required.
The recommended tap drill diameter for the M30 left-hand thread is 26.5 mm — identical to that for the right-hand thread. Thread direction does not affect the tap drill diameter.
Yes, the M30 left-hand thread requires screws and nuts with left-hand threads. Standard right-hand threaded fasteners are not compatible and may damage the thread.
Product accessories
Hand Tap M30 LH DIN 2181/3 6H HSS Fanar
Reference: 802153 In stock < 10 items
€144.74
€178.03 brutto
Reviews
No customer reviews for the moment.
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 |
Recommended for you
This website uses its own and third-party cookies to improve our services and show you advertising related to your preferences by analyzing your browsing habits. To give your consent to its use, press the Accept button.
Cookie preferences
Functional cookiesTechnical
Functional cookies are strictly necessary to provide the services of the shop, as well as for its proper functioning, so it is not possible to refuse their use. They allow the user to browse through our website and use the different options or services that exist on it.
Advertising Cookies
These are cookies that collect information about the advertisements shown to users of the website. They can be anonymous, if they only collect information about the advertising spaces shown without identifying the user, or personalised, if they collect personal information about the user of the shop by a third party, for the personalisation of these advertising spaces.
Analytics cookies
Collect information about the user's browsing experience in the shop, usually anonymously, although sometimes they also allow the user to be uniquely and unequivocally identified in order to obtain reports on the user's interests in the products or services offered by the shop.