# Step Drill NK-2F | \u00d8 6.7 \u00d7 44 mm<\/p>\n
This detailed product description presents the high-precision step drill belonging to the Wielander + Schill VarioDrill WS 90 series, specifically designed for the reliable removal of rivet heads. This tool is an essential accessory for body repair and metal fabrication work where precise and fast disassembly is crucial.<\/p>\n
## Overview and Key Features<\/p>\n
The NK-2F type step drill belongs to the category of dismantling tools and is optimized for VarioDrill WS 90 systems. Its main task is the efficient and clean removal of rivet heads, minimizing the risk of damage to the surrounding material. The two-step design (2F) ensures fast material removal and precise centering.<\/p>\n
This drill is the ideal choice for professionals who frequently work on modern vehicle bodies, where handling high-strength steels and special rivet joints is essential.<\/p>\n
**Main Advantages:**<\/p>\n
* **Special Application:** Optimized specifically for loosening and removing rivet heads.
\n* **Excellent Material Quality:** The combination of Carbide and HSS (High-Speed Steel) guarantees long service life and excellent cutting performance, even for hard materials.
\n* **Precise Fit:** The 8.0 mm shank diameter ensures stable mounting in suitable drilling equipment (e.g., VarioDrill WS 90).
\n* **Two-Step Design:** Enables faster drilling compared to conventional step drills, as it removes material more efficiently.<\/p>\n
## Technical Data<\/p>\n
The table below summarizes the critical technical parameters of the NK-2F step drill, ensuring optimal tool utilization for the specified application area.<\/p>\n
| Property | Value | Unit | Note |
\n| :— | :— | :— | :— |
\n| **Cikksz\u00e1m** | 627001 | – | A term\u00e9k egyedi azonos\u00edt\u00f3ja |
\n| **Term\u00e9k megnevez\u00e9se** | L\u00e9pcs\u0151f\u00far\u00f3 NK-2F | – | K\u00e9tl\u00e9pcs\u0151s kialak\u00edt\u00e1s |
\n| **Diameter (\u00d8)** | 6.7 | mm | Diameter of the drilling working part |
\n| **Total Length** | 44.0 | mm | Total length of the tool |
\n| **Dimensions (Length x Width x Height)** | 44 x 8 x 8 | mm | Physical dimensions of the drill |
\n| **Anyag\u00f6sszet\u00e9tel** | Karbid, HSS, F\u00e9m | – | A szersz\u00e1m tart\u00f3ss\u00e1g\u00e1t \u00e9s \u00e9less\u00e9g\u00e9t biztos\u00edtja |
\n| **Shank Diameter** | 8.0 | mm | Diameter of the clamping shank |
\n| **Weight** | 0.030 | kg | Weight of the tool |
\n| **Packaging Unit** | 1 piece | Stk. \/ Piece | Packaging unit |<\/p>\n
## Application Area and Compatibility<\/p>\n
This step drill was specifically designed for the **VarioDrill WS 90** system, which is the cornerstone of Wielander + Schill's separation technology. The 8 mm shank diameter ensures precise and secure mounting of the tool in the appropriate drill head holder.<\/p>\n
The drill is ideal for the following:<\/p>\n
1. **Rivet Head Removal:** The most common application area, where the drill is used to remove the material of the rivet head, allowing the rivet to be easily pushed out or removed without damaging the surrounding sheet metal.
\n2. **Machining High-Strength Steels:** The combination of HSS and Carbide materials enables the efficient drilling of modern, high-strength (AHSS\/UHSS) body components.<\/p>\n
## Recommended Accessories for Maximum Performance<\/p>\n
To increase tool life and optimize cutting quality, the manufacturer recommends using the following accessory products, which are ideal for metal processing applications:<\/p>\n
### BTR\/BOR Fluid (Cutting Oil)<\/p>\n
The silicone-free BTR\/BOR cutting oil is essential during the drilling process, especially when machining high-strength automotive steels. This fluid significantly increases the lifespan of cutting tools (drills, milling cutters, saws) and ensures optimal cutting performance.<\/p>\n
| Product | Part Number | Packaging | Benefit |
\n| :— | :— | :— | :— |
\n| BTR\/BOR Fluid | 628000 | 125 ml | Increases tool life, silicone-free |
\n| BTR\/BOR Fluid | 648007 | 50 ml | Ideal for smaller workshops |<\/p>\n
### VarioDrill WS 90 Accessories<\/p>\n
To increase the flexibility of operation, extension pieces are available:<\/p>\n
| Product | Part No. | Description |
\n| :— | :— | :— |
\n| Extension 135 mm | 608010 | Extension element for the VarioDrill WS 90, for hard-to-reach areas |
\n| Extension 85 mm | 608011 | Extension element for the VarioDrill WS 90 |<\/p>\n
### WS Special Center Punch<\/p>\n
Precise positioning is critical before drilling rivet heads. The special self-centering punch performs two functions:<\/p>\n
* **1st Function:** Marking from the side of the rivet head.
\n* **2nd Function:** Marking from the back side of the rivet.<\/p>\n
This tool (Part No: 628006) ensures that the step drill bit hits exactly the center of the rivet, preventing the drill bit from slipping.<\/p>\n
## Summary<\/p>\n
The **Step drill bit NK-2F (627001)** is a professional quality step drill with a diameter of 6.7 mm and a length of 44 mm, featuring an 8 mm shank. It is excellently suited for the quick and clean removal of rivet heads encountered during body repair. The carbide and HSS materials guarantee durability, while compatibility with the VarioDrill WS 90 system ensures efficient integration of the tool into existing workflows. The use of appropriate cutting fluid further enhances the tool's performance and lifespan.<\/p>","protected":false},"excerpt":{"rendered":"
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