# 120\u00b0 Countersink Counterbore with Depth Stop and Pilot Pin (Item No.: 617240)<\/p>\n
This detailed product description presents the 120\u00b0 countersink flat end mill from the professional tools range of Wiel\u00e4nder+Schill, equipped with a depth stop and pilot pin. This tool is essential for precise hole machining, especially when installing screws and rivets, ensuring a perfect fit and surface finish.<\/p>\n
## Overview and Key Features<\/p>\n
The 120\u00b0 countersink flat end mill, part number 617240, is a fundamental tool for auto body repair and metalworking tasks. Its design allows for the precise and uniform countersinking of holes, which is critical for assembly accuracy and visual appearance. The integrated depth stop and replaceable pilot pin guarantee consistent results with every operation.<\/p>\n
This tool belongs to the Wiel\u00e4nder+Schill category \u201eSeparating Tools\u201d and offers outstanding durability and service life thanks to its high-performance HSS (High-Speed Steel) material.<\/p>\n
### Main Advantages:<\/p>\n
* **Precise Countersinking:** The 120\u00b0 angle is ideal for most standard countersunk head screws and rivets.
\n* **Controlled Depth:** The depth stop prevents excessive material removal, ensuring the desired depth.
\n* **Centering:** The pilot pin enables precise positioning in existing holes.
\n* **High RPM Tolerance:** Can be used at a maximum speed of up to 3000 rpm, allowing for efficient work.
\n* **Quality Material Use:** A combination of HSS (High-Speed Steel) and steel guarantees a long service life.<\/p>\n
## Product Information and Technical Data<\/p>\n
The product is supplied as a complete set, including the countersink flat end mill, the depth stop, and the pilot pin.<\/p>\n
| Property | Value | Comment |
\n| :— | :— | :— |
\n| **Item No.** | 617240 | |
\n| **Content** | 1 set | |
\n| **Angle** | 120\u00b0 | Countersinking angle |
\n| **Counterbore Diameter (\u00d8)** | 3 mm, 6.3 mm | For different hole sizes |
\n| **Pilot Pin Diameter** | 4.0 mm | Default size included in the set |
\n| **Total Length** | 87 mm | |
\n| **Material** | HSS, Steel | High-durability alloy |
\n| **Shank Diameter** | 8.0 mm | Clamping diameter |
\n| **Maximum RPM** | 3000 U\/min (revolutions\/minute) | |
\n| **Weight** | 0.090 kg | |<\/p>\n
### Functional Elements of the Set<\/p>\n
The 617240 set is equipped with the key components required for precision work:<\/p>\n
1. **120\u00b0 Countersink Counterbore:** This main element is responsible for creating the conical shape of the hole. The 120\u00b0 angle is ideal for most standard fasteners.
\n2. **Depth Stop:** This mechanism ensures that the countersinking does not exceed the desired depth, which is essential for maintaining surface flatness, especially on body parts where a flush surface is critical for subsequent painting phases.
\n3. **Pilot Pin:** The pilot pin fits into the existing guide hole, thus guaranteeing that the counterbore is centered exactly in the hole, avoiding centering errors.<\/p>\n
## Application Areas<\/p>\n
This countersink can be excellently applied in the following areas:<\/p>\n
* **Automotive Body Repair:** Precise installation of rivets and countersunk head screws.
\n* **Metal Structures:** Any application where the heads of fasteners must be flush with the surface of the workpiece.
\n* **General Metal and Sheet Metal Processing:** Precise hole preparation for secondary operations.<\/p>\n
## Accessory Parts (Zubeh\u00f6r)<\/p>\n
For maximum flexibility and adaptation to different working environments, Wiel\u00e4nder+Schill offers further accessories for this countersink, which can be purchased separately:<\/p>\n
| Accessory | Part Number | Description |
\n| :— | :— | :— |
\n| **Pilot Pin** | 617245 | 4.0 mm diameter pilot pin for precise positioning. |
\n| **Pilot Pin** | 617246 | 6.3 mm diameter pilot pin for alternative hole sizes. |
\n| **120\u00b0 Countersink (Milling only)** | 617244 | Only the countersink head, if the elements of the existing set need replacement. |
\n| **Automatic Centering Device** | 932521 | Centering aid for preparing drilling and milling operations. |<\/p>\n
**Important Note:** Prices for auxiliary guide pins (617245, 617246) and the separate countersink (617244) can be viewed online after logging in.<\/p>\n
## Machining Suggestions<\/p>\n
To achieve optimal tool performance, it is recommended to adhere to the specified maximum rotational speed (3000 RPM). The HSS material is also excellently suited for machining harder materials, but using appropriate cooling and a slower rotational speed can increase tool life in cases of extreme load. The 8.0 mm shank diameter ensures stable clamping in suitable drilling or milling machines.<\/p>\n
This 120\u00b0 countersink with depth stop and pilot pin is a reliable, professional solution for fulfilling precision hole machining requirements in bodywork and sheet metal industry.<\/p>","protected":false},"excerpt":{"rendered":"
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