STI Hand Tap ISO 529 HSS-G - M 48 x 4
The STI Hand Tap ISO 529 HSS-G - M 48 x 4 is designed for manually cutting receiving threads for wire thread inserts. In a large thread size such as M 48 x 4, a correctly prepared STI thread is essential so that the insert can be installed securely and the repaired internal thread can perform reliably.
This HGB S2 hand tap follows ISO 529 dimensions and is intended for controlled manual use in repair and maintenance work. With a specified core hole diameter of 49.20 mm, ISO1 (4H) tolerance and DIN 13 thread reference, it is clearly assigned to an STI-M receiving thread system.
- for general use
- for easily machinable materials up to 900 N/mm²
- for unalloyed and low-alloy steels
- for manual use
- for STI-M receiving threads in size M 48 x 4
- for thread repair with wire thread inserts
- for large components, fixtures, machine parts and repair points with large internal threads
- for workshop, service and maintenance tasks where a damaged thread must be prepared for an insert system
Note: For STI threads, the core hole, tap and thread insert must match precisely. For this version, a core hole diameter of 49.20 mm is specified. Further matching system solutions can be found in the VÖLKEL thread repair category.
- precise design for STI-M receiving threads M 48 x 4
- well suited for controlled manual cutting of large receiving threads
- HSS-G material for clean cutting in easily machinable materials
- useful for repair cases where a wire thread insert restores the final internal thread
- clear technical assignment through ISO 529, DIN 13 and ISO1 (4H) tolerance
- practical for single repairs, rework and maintenance of larger components
Disadvantage
- in size M 48 x 4, manual cutting requires high force; for critical repair cases and matching system components, suitable VÖLKEL thread repair solutions help with selection
- First check that the thread insert, STI hand tap and core hole diameter match the M 48 x 4 system.
- Prepare the 49.20 mm core hole and deburr the bore carefully.
- Secure the component so the tap can be started straight and stable.
- Position the STI hand tap at a right angle and pay particular attention to the first entry.
- Use a suitable tap wrench and guide both arms evenly to avoid misalignment.
- Apply suitable cutting lubricant and keep the torque as even as possible.
- Use short reverse movements during cutting to break and release chips.
- Clean the receiving thread thoroughly before installing the wire thread insert.
- 1x STI Hand Tap ISO 529 HSS-G - M 48 x 4
- Article number: 03076
- Special article: no
- Product type: STI hand tap for receiving threads
- Type category: HGB
- Type: S2
- Dimensional standard: ISO 529
- Flute form: N
- Material: HSS-G
- Thread type: STI-M
- Nominal diameter D: 48 mm
- Nominal size: M 48 x 4
- Pitch P: 4.0 mm
- Thread direction: RH
- Thread standard: DIN 13
- Tolerance: ISO1 (4H)
- B dimension: 53.2 mm
- Overall length L1: 175.000 mm
- Thread length L2: 45.000 mm
- Shank diameter D2: 35.500 mm
- Square k: 31.000 mm
- Bore: DSLO
- Core hole diameter: 49.20 mm
- Packaging unit: 1
- Application code: TAVCG-S2
- Image data no.: BD030S2
- GTIN: 4022835030768
- Customs tariff number: 8207401000
- Delivery weight per storage unit: 3.48381 kg
- Net price: €674.00
- Gross price incl. 19% VAT: €802.06
- What is this STI hand tap used for?
It cuts the STI receiving thread for a matching wire thread insert. The insert then forms the final internal thread in size M 48 x 4.
- Why is the core hole diameter important for M 48 x 4?
Large STI threads involve high cutting forces. The 49.20 mm core hole must match the tap and insert system so the wire thread insert can be seated correctly.
- Can a standard M 48 x 4 tap be used instead?
No. An STI tap cuts a special receiving thread for thread inserts. A standard tap would cut a normal internal thread and therefore would not fit the wire thread insert system.
- Which materials are suitable for HSS-G?
The HSS-G version is intended for general use in easily machinable materials up to 900 N/mm², especially unalloyed and low-alloy steels.
- What does ISO1 (4H) tolerance mean?
The tolerance describes the fit of the receiving thread produced by the tap. It is part of the technical assignment of the STI repair system.
- Where can you find matching thread repair components?
Matching tools, inserts and system solutions can be found in the VÖLKEL thread repair category.
Do you need support with selection or application?
Use the contact form.
