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Address: 1178 Zhaizishan Road, Huangdao District, Qingdao City, Shandong Province
Phone: +86-15063986252
Whatsapp: 8615063986252
Email: lucas@ruiliftools.cn
Replaceable-Head or Indexable Drill: How to Choose
Release Time:
Jul 28,2024
Choose between replaceable-head and indexable-insert drills by hole requirements, supported materials, machine capability and cost per accepted hole.
News Summary
A replaceable-head drill and an indexable-insert drill are different tooling concepts, not different grades of diamond. The terms crown drill and U-drill are used inconsistently in translated catalogues, so a comparison should identify the actual tool design and model.
Understand the Cutting Arrangement
A replaceable-head drill uses a cutting head matched to a reusable body. Many indexable drills use separate inserts at center and peripheral cutting positions, although the arrangement depends on the design. Neither the term U-drill nor crown drill should be used to infer a U-shaped body, a hexagonal cutting head or an adjustable clamping angle.
Do Not Assign a Whole Tool Type to One Material
It is incorrect to say that indexable drills are mainly for thin, brittle aluminium while replaceable-head drills are only for hard steel. Supported workpiece materials depend on the tool family, cutting geometry, grade, coating and operating guidance. Check the specific recommendation for the material and its condition.
Start with the Hole Requirement
Compare the required diameter, depth, diameter tolerance, surface finish and blind-hole bottom geometry. Include angled entries, interruptions and any planned finishing operation. The assembly must also fit the spindle interface, available power and torque, fixture clearance and coolant supply.
Compare Total Process Cost
Record the cost of the body and replacement cutting parts, accepted holes per cutting component, changeover time and any additional finishing. One design is not automatically less expensive merely because a replacement insert has a lower purchase price. Use equivalent workpieces and inspection criteria for the comparison.
Conclusion
There is no universal winner between replaceable-head and indexable-insert drilling. Select a supported tool assembly for the actual hole, machine and material, then assess the results against the drawing.
Review the cutting head and insert selection guide before requesting replacement components.
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Ruilif Tools (Qingdao) Co., Ltd.
Founded in 2011, Ruilif Tools (Qingdao) Co., Ltd. manufactures modular drill bodies, replaceable cutting heads and custom hole machining tools.
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