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Machine Tap DIN 371 Form C 35° Spiral Flute HSSE - BSW 1/4 x 20

Name: Machine Tap DIN 371 Form C 35° Spiral Flute HSSE - BSW 1/4 x 20
Brand: VOLKEL
SKU: 70714
Price: 498000.0 VND
Availability: OutOfStock

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Imported from: Germany

Origin: Made in Germany

Machine Tap DIN 371 Form C 35° Spiral Flute HSSE - BSW 1/4 x 20 by VÖLKEL, item no. 70714, suitable for cutting internal threads.

SKU: 70714

498.000 đ

Price includes VAT

Description

Machine Tap DIN 371 Form C 35° Spiral Flute HSSE - BSW 1/4 x 20

You use Machine Tap DIN 371 Form C 35° Spiral Flute HSSE - BSW 1/4 x 20 when you need a controlled internal thread in a prepared hole during production or maintenance work. The spiral flute supports chip transport out of the hole during tapping.

When you select the variant, match the thread system and the nominal designation in the product name to the drawing and the mating fastener. For inch based thread forms, confirm series and class of fit and avoid mixups between similar designations.

Application

Cut internal threads in predrilled holes in mechanical engineering, maintenance, and metal fabrication.
Use for Whitworth BSW threads as designated in the product name.
Prefer for blind holes where chip transport out of the hole is required.
Use a machine tap holder or tapping chuck that clamps the shank securely and supports straight entry.
Process: manual driving or assisted driving depending on your holder and machine setup
Use: thread cutting, re tapping, and thread cleaning depending on condition

Note Verify the exact designation, standard, and tolerance in the product name before you start.

Benefits

Simple inspection using a suitable screw or gauge after cleaning the thread.
Spiral flute supports chip evacuation from blind holes and reduces jamming risk.
Suitable for repeatable workflows in maintenance and serial production setups.
Efficient chip transport supported by flute design when correct cutting fluid is used.
Consistent internal thread geometry when the tool is guided square to the surface.

Drawbacks

Not suitable for hard to machine materials without defined cutting data and stable machine rigidity.
Not intended for high output production where dedicated high performance tooling is required.

Step by step

Confirm the thread designation in the product name matches the drawing and the mating screw.
Prepare a suitable predrilled hole and deburr the entry for clean lead in.
Clamp the tap in a stable machine tap holder or tapping chuck.
Align the spindle square to the surface so the tap starts without side load.
Apply suitable cutting fluid and start tapping with steady feed.
Monitor chip evacuation and reverse out to clear chips if resistance increases.
Back out completely and flush the thread to remove chips and fluid residues.
Inspect the result with a suitable screw or gauge before assembly.

Scope of supply

The provided product data does not include an itemized scope of supply for Machine Tap DIN 371 Form C 35° Spiral Flute HSSE - BSW 1/4 x 20. If your process requires accessories such as holders or cutting fluid, select them separately based on your setup.

Technical features

Product type: machine tap
Thread designation: BSW 1/4 x 20
Thread system: Whitworth BSW
Standard: DIN 371
Tool material: HSSE
Flute type: 35° spiral flute
Tolerance class: medium

Frequently asked questions (FAQ)

How do you select the correct variant for your drawing Match the thread designation in the product name to the drawing and the mating fastener. Confirm thread series, pitch, and class of fit before you start, especially for inch based threads. Is this tap suitable for blind holes or through holes The suitability depends on flute geometry and lead form noted in the product name. Spiral flute execution is typically chosen for blind holes because chips are transported out of the hole. Where can you find technical background information for this tap type Use this PDF for technical notes, application limits, and terminology. Inch to mm conversion table as PDF Which tolerance class do you typically achieve The typical tolerance class for this execution is medium when the process is set up correctly and the hole preparation matches the thread system. Do you need cutting fluid Yes, use suitable cutting fluid for the material to reduce friction and control chip formation. Keep lubrication consistent from start to finish and clean the tool after use. Which holder should you use Use a holder that clamps the shank securely and supports straight entry. In manual work this is typically a tap wrench, and in machines a tapping chuck or a suitable collet holder. Where can you find the VÖLKEL catalog for additional variants and technical context Use the catalog for the full program and selection guidance. VD 23 catalog as PDF

Do you need help selecting or using the product?
Use the contact form.

Specifications

Type of thread	Whitworth-Thread
Standard	DIN 371
Form	Form C
Material	HSSE
Tolerance	medium
Size	BSW 1/4 x 20
Overall length (L1)	80 mm
Thread length (L2)	13 mm
Core hole diameter (D1)	5.1 mm
Shank diameter (D2)	7.0 mm
Drive connector	5.5 mm
EAN	4022835707141
Item number	70714
Type of flute	35° Spiral Flute
Application	for blind holes
Thread standard	BS 84