Cooling lubricants for screw taps: types & use
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In every manual for thread cutting, there's always a strong recommendation to use cooling lubricants for screw taps. This advice is not to be taken lightly! The process of thread cutting generates friction, which in turn produces heat, accelerates tool wear, and leads to poor surface finishes. Neglecting to use cooling lubricants can damage both the tap and the workpiece.
When it comes to tap lubrication, there are many products available, each with unique features tailored for different applications. These range from varying consistencies to specialized additives that offer benefits like corrosion protection or improved lubrication performance. With so many options, choosing the right one can feel overwhelming. We’ll break down the key factors to consider when selecting a cooling lubricant for your screw taps.
The main purpose of cooling lubricants for screw taps is clear: they cool and lubricate. However, these two functions aren’t always equally important. Depending on the machining conditions, one may take precedence over the other. For example, at higher cutting speeds, the need for lubrication becomes more critical than cooling. In addition to this, cooling lubricants help in removing chips effectively, ensuring smooth material removal during the process.
The primary roles of cooling lubricants for screw taps include:
- Cooling effect
- Lubricating effect
- Chip removal
Cooling lubricants are standardized according to DIN 51385, which classifies them as either water-miscible or non-water-miscible. Water-miscible lubricants are mixed with water before use and are especially effective at dissipating heat. Non-water-miscible lubricants, typically based on mineral oils, focus more on providing excellent lubrication and are often used in situations where high-pressure performance is required.
The type of coolant you choose depends largely on the material being machined. For steel, water-based coolants are commonly used, while harder materials like INCONEL might require non-water-miscible options. Special care must also be taken when working with magnesium or titanium, as certain coolants can lead to dangerous chemical reactions if not selected properly.
In industrial settings, a consistent and even supply of coolant is essential. Coolant can be delivered internally through the tool or externally via nozzles. For hobbyists or DIYers, applying the lubricant manually and reapplying as needed is usually sufficient.
If you're looking for a reliable and versatile cooling lubricant for screw taps, consider checking out the cutting paste from BAER, a trusted manufacturer of screw taps. It’s suitable for various materials, easy to use, and free from harmful substances like petroleum, chlorine, and sulfur. If you have any questions about the best lubricant for your project, their customer service team is always ready to help.