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HSS Titanium Coated Step Drill Bit Straight Groove Drilling Powe

$24

HSS Titanium Coated Step Drill Bit Straight Groove Drilling Powe

Product description

Rotating speed:
4-12 speed:260-400
4-20 Speed:180-240
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.

Length:
3-12mm Length: Approx. 77mm/ 3.03"
4-12mm Length: Approx. 67mm/ 2.64"
4-20mm Length: Approx. 77mm/ 3.03"
The Cutters Come in the Following Sizes:
3-12mm(3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm) 10 Steps
4-12mm: (4mm, 6mm, 8mm, 10mm, 12mm) 5 Steps
4-20mm:( 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)9 Steps
Package include:
1PC x Drill Bit ( 3-12mm or 4-12mm or 4-20mm)
or
3 Pcs set without bag: 1 PC x Drill Bit ( 3-12mm+4-12mm+4-20mm)
or
3 Pcs set with bag: 1 PC x Drill Bit ( 3-12mm+4-12mm+4-20mm) + 1 Pc x Bag
Note:
1. Item measured by hand, it could be 1-10mm different, your kind understanding will be highly appreciated.
2. Remember that due to lighting effects, monitor's brightness / contrast settings etc., there may be some slight differences in the color tone of the website photo and the actual item.

HSS Titanium Coated Step Drill Bit Straight Groove Drilling Powe

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