ER 25 collets are a type of precision tool holder used primarily in milling machines and machining operations. They are designed to securely grip cylindrical tools such as end mills and drills, allowing for better precision and stability during machining.
ER 25 collets typically have a clamping range that allows them to hold tools with diameters ranging from 1 mm to 13 mm. The overall length of an ER 25 collet is generally around 40 mm. The outer diameter (OD) usually measures about 25 mm, which provides a snug fit in the tool holder. The collet nut, used to secure the collet in place, also has specific dimensions that complement the collet itself.
Dimensions are critical because they determine the compatibility of the collet with both the tool and the tool holder. Using the correct size ensures proper gripping of the tool, reducing the risk of slippage during machining. Incorrect dimensions may lead to vibration, decreased precision, and even damage to the tools or machine.
Most ER 25 collets are made from high-quality tool steel, which offers durability and strength. Some collets may also be coated to enhance their wear resistance and reduce friction. Choosing the right material can affect the performance and lifespan of the collets.
To ensure the longevity and performance of ER 25 collets, regular maintenance is essential. This includes cleaning them after use to remove debris and chips. Inspecting them for wear and damage should also be routine. Proper storage in a clean, dry place can help prevent corrosion and other forms of damage.
ER 25 collets can be purchased from various suppliers, including industrial tool companies and online marketplaces. It's advisable to choose reputable vendors to ensure the quality of the collets. Checking for certification and customer reviews can also help in selecting the right supplier.
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