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Straight stepd drill set for Pagoda, 3-piece HSS scalding drill bit set, fabric bag, hexagonal stem, metal hole and titanium-coated wood, 3-12, 4-12, 4-20MM
Straight stepd drill set for Pagoda, 3-piece HSS scalding drill bit set, fabric bag, hexagonal stem, metal hole and titanium-coated wood, 3-12, 4-12, 4-20MM
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Features:
100% new and high quality
Made of high quality HSS steel
Ideal for use to cut holes in a variety of materials such as steel, brass, wood, plastic, etc.
Titanium cover to reduce impact and heat
Thermal treatment and very polished. Perfectly round drills in steel, brass, plastic, wood, etc.
Three-loor toss design to avoid slides when it's on the wrepper
The two-slot design makes faster, softer, clean cuts, each step is clearly tagged with the depth diameter of steps.
Function:Debbated, bevelled, cut or expansion of holes
Support tools: Gun drill, hand drill, load drill, bench drill, bank drill. (Water injection cooling while working can effectively extend the life of the drilling, especially in the case of continuous drilling)
Spinning speed:
3-12 speeds: 260-400
4-12 speeds: 260-400
4-20 speeds: 180-240
100% new and high quality
Made of high quality HSS steel
Ideal for use to cut holes in a variety of materials such as steel, brass, wood, plastic, etc.
Titanium cover to reduce impact and heat
Thermal treatment and very polished. Perfectly round drills in steel, brass, plastic, wood, etc.
Three-loor toss design to avoid slides when it's on the wrepper
The two-slot design makes faster, softer, clean cuts, each step is clearly tagged with the depth diameter of steps.
Function:Debbated, bevelled, cut or expansion of holes
Support tools: Gun drill, hand drill, load drill, bench drill, bank drill. (Water injection cooling while working can effectively extend the life of the drilling, especially in the case of continuous drilling)
Spinning speed:
3-12 speeds: 260-400
4-12 speeds: 260-400
4-20 speeds: 180-240
Detail
Attention: Because the outer diameter of each step of the staggered Broca gradually expands, the corresponding cutting resistance and linear speed will also gradually increase.
Because the staggered drill depends entirely on the sloping edge that is only 1mm long, if the power speed is too fast when drilling, it will be easily annealed caused by the abrasion of the oblique edge.
Please apply a downward force when drilling, do not press down too hard to avoid wear and tear on the edge.
Proper material: working parts with general hardness, such as wood, plastic, PVC plate, iron plate, plate thickness of 3mm. Note that stainless steel and spring steel are not applicable. Not to shut down. (Water injection cooling while working can effectively extend the life of the drilling, especially in the case of continuous drilling)
Length:
3-12mm in length: approx. 7.9 cm/3,11"
4-12mm Length: Approx. 6.7 cm/2,64"
4-20mm Length: Approx. 7.4 cm/2,91"
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