3Pcs/Set 3-12Mm 4-12Mm 4-20Mm Hss Straight Groove Step Drill Bit Coated Wood Metal Hole Cutter Core Drilling Tools Set
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Unit Price | $2.49 | $2.35 | $2.22 | $1.94 |
Customer Reviews
*Note: Some reviews have been processed by Google Translate!DIY Supplies: Woodworking
Type: Center Drill Bit
Use: Wood Drilling
Model Number: 182210864
Certification: NONE
Material: High Carbon Steel
type1: Drill bit
type2: Drill bits for wood
type3: Mini drill
type4: Conical drill
type5: Woodworking
type6: Straight flute step drill
type7: Mini
type8: Conical
type9: Drill holder
type10: Wood Drilling
type11: tools
type12: woodworking tools
type13: Bit for electric screwdriver
type14: Metal drills
type15: Construction tools
type16: Wood cutters
type17: Hammer drill
type18: Step drill bit
type19: Drill bits for wood
type20: Woodworking tools
Brand New and High Quality
Made from high quality HSS steel
Ideal for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc.
Titanium coated to reduce mit and heat
Heat treated and highly polished. Drills perfectly round holes in steel, brass, plastic, wood etc.
3 sided shanks design in order to prevent slippage when in chuck
Two flute design drives faster, smoother and cleaner cuts each step is clearly labeled with the depth diameter in steps
Function: Deburring, Chamfering, Cutting or expanding holes
Supporting tools: Pistol drill, Hand drill, Charging drill, Bench drill. (Water injection cooling while working, it can effectively extend the service life of the drill bit, especially in the case of continuous drilling)
Package include:
Type1: 3-12 4-12 4-20 bag
1 x Drill Bit 3-12mm
1 x Drill Bit 4-12mm
1 x Drill Bit 4-20mm
1 x BagBag color black blue random
Type2:3-12 4-12 4-20
1 x Drill Bit 3-12mm
1 x Drill Bit 4-12mm
1 x Drill Bit 4-20mm
Type3:4-12
1 x Drill Bit 4-12mm
Type4:4-20
1 x Drill Bit 4-20mm
Attention:Because of the outer diameter of each step of the step drill is gradually expanded,then the corresponding cutting resistance and linear velocity will also be gradually increased.
Owing to the step drill is completely dependent on the inclined edge that is only with 1mm length,If the feed speed is too fast when drilling,it will be easily to be annealing caused by abrasion of the oblique edge.
Please give a downward force when drilling, do not press down too hard to avoid the edge wearing.
Suitable material: Workpieces with general hardness, such as wood, plastic, PVC plate, iron plate, plate thickness within 3MM. Please note that stainless steel and spring steel are not applicable. Not for quenching. (Water injection cooling while working, it can effectively extend the service life of the drill bit, especially in the case of continuous drilling)