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Cooling lubricants for screw taps: types & use
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 overlooked! The process of cutting threads generates friction, which leads to increased heat, tool wear, and poor surface finish on the threaded part. Without proper cooling lubricants, both the tap and the workpiece can suffer damage.
When it comes to tap lubrication, there are many specialized products available, each with unique properties tailored for different applications. These range from varying consistencies to the inclusion of specific additives that offer benefits like corrosion protection or improved lubrication performance. With such a wide selection, it can be confusing. We'll break down the differences and help you understand what to look for when choosing a cooling lubricant for screw taps.
Cooling lubricants for screw taps have three main functions: cooling, lubricating, and aiding in chip removal. While both cooling and lubrication are important, the emphasis often shifts depending on the machining conditions. At higher cutting speeds, the need for lubrication becomes more critical, as excessive heat can reduce the effectiveness of the coolant. Additionally, these lubricants help in efficiently removing chips, ensuring smooth operation during the threading process.
There are two primary types of cooling lubricants: water-miscible and non-water-miscible. Water-miscible coolants are mixed with water and are especially effective at dissipating heat. Non-water-miscible coolants, typically based on mineral oils, provide excellent lubrication and are ideal for more demanding applications. Both types come with various additives that enhance their performance, such as EP (extreme pressure) additives or corrosion inhibitors.
The choice of lubricant depends largely on the material being machined. For example, water-based coolants are commonly used when working with steel, while non-water-miscible options may be preferred for difficult-to-machine alloys like INCONEL. Special care must also be taken when machining materials like magnesium or titanium, as certain coolants can lead to dangerous chemical reactions.
In industrial settings, a consistent and even supply of coolant is essential. Coolant can be directed internally through the tool or externally via nozzles. For hobbyists or small workshops, manually applying the lubricant is sufficient, though it should be reapplied regularly to maintain effectiveness.
Choosing the right cooling lubricant involves considering factors like cutting conditions, the type of tap being used, and the material being worked on. In most home or garage environments, universal products that are suitable for a variety of materials are often a good choice. Just make sure the product is specifically designed for screw taps and comes from a reliable source.
If you're looking for a high-quality cooling lubricant for screw taps, consider checking out the cutting paste offered by BAER, a reputable screw tap manufacturer. It's versatile, easy to use, and free from harmful substances like petroleum, chlorine, and sulfur. For more information or assistance, their customer service team is always ready to help.