Guide Drill

Item No:MP4403

 

1. Core function: large-diameter metal drilling

 

This tool is a cemented carbide hollow drill (core drill), which is mainly used to machine large holes with a diameter of 80mm and a depth of ≤50mm on metal materials. Through the design of "guide drilling positioning + multi-edge cutting", it achieves high efficiency and precision Drilling operations.

 

2. Applicable materials and processing scenarios

 

Applicable materials

Steel: such as Q235, 45 #steel, 50Cr and other medium and low hardness steels (hardness ≤30HRC), the 50Cr tool body and YG-11C insert can withstand cutting stress.

Cast iron: gray cast iron, nodular cast iron, etc. The high wear resistance of YG-11C is suitable for brittle cutting of cast iron.

Non-ferrous metals: such as aluminum alloy and copper alloy (the speed needs to be reduced to avoid sticking to the knife), but are preferably used for steel materials.

 

typical application scenarios

Steel structure engineering: Drill installation holes (such as bolt connection holes, pipeline perforations) in steel beams, steel columns, and steel plates. The diameter of 80mm is suitable for bolts or pipes below M72.

Mechanical manufacturing: Processing through holes or blind holes in flanges, equipment casings, mold floors and other parts, and using SDS plus electric hammers or bench drills to achieve mass production.

Ship and bridge maintenance: Rapid drilling into corroded or high-strength metal components, and the impact function of SDS plus helps break down

 

surface oxide layers.

Automotive and aviation maintenance: Drill maintenance holes in frames, engine casings and other components. The hole depth of 50mm meets the thickness requirements of most parts.

 

 

3. Tool performance and advantages

 

efficiency advantages

Compared with solid drill bits, the hollow drill design reduces the cutting volume by more than 70%, and the processing time of 80mm holes is shortened to 1/3 of that of traditional drill bits.

YG-11C cemented carbide inserts can withstand cutting temperatures above 300 ° C, continuous processing without chipping, and are suitable for batch operations.

 

Accuracy advantages

The positioning error of guide drill is ≤0.3mm, and the hole wall roughness Ra is ≤12.5μm, which meets the installation accuracy requirements of general structural parts.

The 50Cr tool body has strong rigidity, and the drilling roundness error is ≤0.5mm, which prevents bolts from being unable to assemble due to hole deformation.

 

Durability advantages

The bending strength of YG-11C blade (containing 11% cobalt) is ≥1800MPa, and its life can reach 50-80 cycles per blade when processing Q235 steel plate.

The 50Cr tool body has been quenched + tempered (hardness HRC30-35) and has good fatigue resistance and can be used repeatedly for more than 1000 times.

 

 

4.Precautions and suitable equipment

Equipment adaptation: An electric hammer, impact drill or bench drill with SDS plus interface must be used (conversion chuck required) to ensure that the handle is securely installed.

 

Safe operation: Wear protective glasses during processing, and fix the workpiece when cutting large diameter holes to avoid shaking of the equipment due to reaction force.

 

Maintenance: Clean the chips on the cutter body after each use. Replace the blade when the wear exceeds 0.5mm. If the 50Cr cutter body cracks, it must be scrapped immediately.

 

This tool achieves the integrated function of "positioning-cutting-durability" through parametric design. It is an efficient and reliable professional tool in large hole metal processing.

 

 

 

 

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