What does GREEN RING stand for at VÖLKEL?

GREEN RING identifies HSSE machine taps with spiral flute geometry optimized for blind holes and long-chipping materials, ensuring secure chip evacuation and consistent thread quality.

Which materials is the set suitable for?

For general use in unalloyed and low-alloy steels up to 900 N/mm² and other long-chipping materials. For stainless/high-alloy steels, choose suitable HSSE/HSSE-Co variants.

Why are twist drills included?

The included twist drills match the core hole diameters for M3–M12, creating an optimal pairing between drilling and tapping for accuracy and tool life.

Is the set designed for blind holes?

Yes. The spiral flute pulls chips out of the blind hole, reducing chip packing and improving process reliability.

Can I replace individual sizes if one breaks?

Yes. All sizes are available individually—see the linked product pages in the contents section.

Home Bộ mũi khoan kim loại GREEN RING Machine taps for blind holes (set of 14 pcs.) incl. drills DIN 371/376 M 3 – M 12

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GREEN RING Machine taps for blind holes (set of 14 pcs.) incl. drills DIN 371/376 M 3 – M 12

Name: GREEN RING Machine taps for blind holes (set of 14 pcs.) incl. drills DIN 371/376 M 3 – M 12
Brand: VOLKEL
SKU: 47866
Price: 4416000.0 VND
Availability: OutOfStock

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GREEN RING Machine taps for blind holes (set of 14 pcs.) incl. drills DIN 371/376 M 3 – M 12 by VÖLKEL, item no. 47866, suitable for metal drilling and thread preparation. Key specs: Size: Diameter M 3 - 12; Material: HSS-E; Standard: DIN 371/376.

SKU: 47866

4.416.000 đ

Stock status: Hết hàng

Price includes VAT

Description

VÖLKEL GREEN RING HSSE Tap Set M3–M12 DIN 371/376 (incl. drills)

VÖLKEL GREEN RING Machine taps for blind holes (set of 14 pcs.) incl. drills DIN 371/376 M 3 – M 12

The VÖLKEL GREEN RING machine tap set in HSSE is your reliable all-in-one solution for production and maintenance. The GREEN RING spiral-flute geometry enables secure chip evacuation—ideal for blind holes and long-chipping materials. The set covers metric ISO coarse threads M3–M12 and includes matched twist drills for core holes.

Application & Benefits

For general use in metalworking—especially when you need repeatable tapping in blind holes and expect long, continuous chips.

For non-abrasive materials up to 900 N/mm²
Unalloyed & low-alloy steels, long-chipping materials
HSSE for heat-resistant cutting edges and long tool life
Spiral flute for controlled chip evacuation from blind holes
ISO 2 (6H) – consistent ISO-fit threads per DIN 13

Learn the GREEN RING concept: ➜ watch on YouTube

Set Contents

The seven GREEN RING machine taps (HSSE) cover the most common M sizes. You can reorder each size individually via the links:

1x GREEN RING Machine Tap, DIN 371, HSSE, M 3 x 0.5 VÖLKEL 36326
1x GREEN RING Machine Tap, DIN 371, HSSE, M 4 x 0.7 VÖLKEL 36330
1x GREEN RING Machine Tap, DIN 371, HSSE, M 5 x 0.8 VÖLKEL 36334
1x GREEN RING Machine Tap, DIN 371, HSSE, M 6 x 1.0 VÖLKEL 36338
1x GREEN RING Machine Tap, DIN 371, HSSE, M 8 x 1.25 VÖLKEL 36342
1x GREEN RING Machine Tap, DIN 371, HSSE, M 10 x 1.5 VÖLKEL 36346
1x GREEN RING Machine Tap, DIN 376, HSSE, M 12 x 1.75 VÖLKEL 36350
Twist drills: 2.5 / 3.3 / 4.2 / 5.0 / 6.8 / 8.5 / 10.2 mm

From core hole to finished thread, everything you need is in one box—covering the sizes you use daily in service, assembly, and repair.

Step-by-Step (Machine tapping)

Drill the core hole: Pick the matching twist drill (e.g., M8 → Ø 6.8 mm). Drill, deburr, and lightly countersink.
Clamp & align: Secure the tap coaxially (length-compensation chuck recommended). Rigidly clamp the workpiece.
Lubricate: Apply cutting oil/gel to tool and bore—especially important in blind holes.
Tap the thread: Use appropriate speed/feed. The spiral flute conveys chips upward out of the blind hole.
Retract: Back the tool out in a controlled manner. Avoid lateral loading.
Clean & verify: Remove chips, visually inspect, and verify with screw/gauge (6H).
Document (optional): Note parameters and tool life for repeat jobs.

Technical Specifications

The GREEN RING HSSE tap set is built to international standards and optimized for blind hole applications. The table below summarizes the key specifications that ensure compatibility, accuracy and process reliability.

Thread type	Metric ISO thread (DIN 13)
Standards	DIN 371 / DIN 376
Material	HSSE (High-Speed Steel with Cobalt)
Tolerance	ISO 2 (6H)
Range	M 3 – M 12 (7 taps)
Included drills	Ø 2.5 / 3.3 / 4.2 / 5.0 / 6.8 / 8.5 / 10.2 mm
Geometry	Spiral flute – optimized chip evacuation for blind holes
Use case	General use; unalloyed & low-alloy steels, long-chipping materials ≤ 900 N/mm²
Packaging	Plastic cassette
EAN	4022835478669
Item no.	47866

FAQ

Can I combine VÖLKEL drills and cutting oils with this set?
Absolutely. The matched drills are included; using cutting oil/gel further improves surface finish and tool life.

How do I determine the right cutting speed?
It depends on the material. Start with conservative parameters, observe chip form and finish, then optimize.

Is the set suitable for use on CNC machines?
Yes—use appropriate holders (e.g., tapping chucks) and correct speed/feed synchronization.

What if chips pack in a blind hole?
Increase lubrication, clear chips, and adjust cutting data. The spiral flute helps evacuate chips upward.

Can I reorder individual sizes if one wears out?
Yes. Each size is available separately—see the links in “Set Contents”.

Need help selecting the right GREEN RING HSSE tap set for your materials or process? Contact our team and we’ll be happy to advise you.

Specifications

Type of thread	metric ISO-thread DIN 13
Standard	DIN 371/376
Form	Form
Material	HSS-E
Tolerance	ISO 2 /6H
Size	Diameter M 3 - 12
Packing	in plastic case
EAN	4022835478669
Item number	47866