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Step drill bit Cimco 207375
The Cimco 207375 step drill bit combines drilling, thread tapping and deburring in a single operation. Made from high-speed steel (HSS), it is suitable for use on steel and non-ferrous metals and designed for material thicknesses up to 1× diameter. The tool is a one-piece design that delivers a range of hole sizes with controlled progression from pilot to final diameter.
The HSS construction provides wear resistance and reliable cutting performance on ferrous and non-ferrous materials. Integrating drilling, tapping and deburring into one tool reduces tool changes and saves working time. The stepped profile enables smooth chip evacuation and gradual enlargement of holes, improving accuracy and finish.
Secure the workpiece and select the appropriate drill speed for HSS in the target material. Start with the step drill at the working speed, applying steady axial pressure to progress through the steps until the required diameter is reached. For tapping function, proceed at a controlled feed so the tool forms or cuts the thread within its limits. Withdraw the tool periodically to clear chips and check the hole size. Use cutting fluid where appropriate to reduce heat and extend tool life.
Use appropriate safety equipment and clamp the workpiece securely. Match spindle speed and feed to material type, and apply cutting fluid for improved life and finish. Do not exceed the specified material thickness of 1× diameter to avoid tool damage.
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