Kunshan Meiyaxing Hardware Machinery Co., Ltd. is a direct branch of Hong Kong Meiya International Trading Co., Ltd. in China. It owns its own cutting tool brand: MANF, and engages in the sales and operation services of CNC cutting tools. It provides tungsten carbide end mills, milling inserts, turning inserts, grooving and parting inserts, drilling and boring inserts, multi-functional inserts, threading inserts, and other indexable inserts and their matching tool holders and tool holders. Furthermore, it has established long-term strategic partnerships with many well-known manufacturers, with joint R&D, design, and production teams, advanced equipment, and continuously innovative technological strength. It is committed to mutual cooperation, guided by technical services, forming a mutually supportive industrial chain to solve various processing problems for manufacturing enterprises.
Applicable Timing: When to Choose a Flat-Bottom Drill?
The value of a flat-bottom drill is particularly prominent in the following scenarios:
1. Blind holes requiring a completely flat bottom. When the bottom of the hole needs to serve as a bearing surface, positioning surface, or needs to be completely flush with the bottom of bolts or pins, a flat-bottom drill is the standard answer. The 118° or 135° taper angle of ordinary twist drills cannot meet these requirements.
2. Aluminum Alloys (Especially Color-Coated Models)
Color-coated parts (such as gold, blue-gray) typically represent coatings like TiN, ZrN, or TiCN. These coatings improve drill surface lubrication, reduce aluminum chip adhesion, and enhance wear resistance. Therefore, when drilling holes in aluminum alloys, especially deep holes or large-volume drilling, coated flat-bottom drills should be the preferred choice.
3. Finishing of Thin-Walled and Easily Deformable Parts
Flat-bottom drills offer a relatively smooth cutting motion and apply a more uniform axial force to the workpiece. When machining thin-walled aluminum parts, this effectively reduces workpiece deformation caused by cutting forces.
Usage and Key Points
• A pilot hole must be pre-drilled: The flat end face of a flat-bottom drill makes it prone to wobbling and eccentricity when drilling directly into solid materials. The correct approach is to first drill a slightly smaller pilot hole with a standard twist drill, then enlarge the hole to the bottom with a flat-bottom drill. This ensures positional accuracy and stability.
• Pay attention to chip removal and cooling: Aluminum machining easily produces long chips that can clog chip flutes. Frequent retraction of the tool is necessary during drilling to remove chips, and sufficient cutting fluid (such as a mixture of kerosene and machine oil) should be used for cooling and lubrication.
• Control feed and depth: When the hole is near the bottom, the feed rate should be appropriately reduced to avoid chipping or drill breakage due to sudden changes in resistance at the moment of penetration. Deep hole machining (such as depth-to-diameter ratios exceeding 5) requires even greater caution and can be completed in multiple passes.
The flat-bottom drill for colored aluminum is a specialized tool designed to solve the problem of "flat-bottom blind holes" in aluminum parts. It is not a panacea, but in situations requiring a flat hole bottom, aluminum alloy materials, and where efficiency and precision are paramount, it is a wiser and more professional choice than general-purpose drills.
If you have any questions about MANF brand tools, please call us for consultation or negotiation"
Contact us:Company name:Kunshan Meiyaxing Hardware Machinery Co., Ltd;Tel:8618962438699;Address: Room 3003, Building 3, Zhengtailong, No. 1288 Chengbei Middle Road, Kunshan City, Jiangsu Province, China;Email:myxcuttingtools@gmail.com;Website: https://www.myxcuttingtools.com
