HSS Titanium Coated Step Drill Bit Spiral Cobalt Set Ranking TOP19 Ho Multiple Spiral,www.volantino-offerte.com,Cobalt,Set,Coated,Bit,Ho,Titanium,Industrial Scientific , Cutting Tools,/altricial666294.html,HSS,Drill,Multiple,Step,$41 HSS Titanium Coated Step Drill Bit Spiral Cobalt Set Ranking TOP19 Ho Multiple Spiral,www.volantino-offerte.com,Cobalt,Set,Coated,Bit,Ho,Titanium,Industrial Scientific , Cutting Tools,/altricial666294.html,HSS,Drill,Multiple,Step,$41 $41 HSS Titanium Coated Step Drill Bit Set Spiral Cobalt Multiple Ho Industrial Scientific Cutting Tools $41 HSS Titanium Coated Step Drill Bit Set Spiral Cobalt Multiple Ho Industrial Scientific Cutting Tools

HSS Titanium Coated Step Drill Bit Spiral Cobalt Set Ranking TOP19 Ho free Multiple

HSS Titanium Coated Step Drill Bit Set Spiral Cobalt Multiple Ho

$41

HSS Titanium Coated Step Drill Bit Set Spiral Cobalt Multiple Ho

Product description

Spiral groove
Specification:
Material:High speed steel
Surface treatment: Titanium Plating
Outer edge angle:118 degree
Handle: Hex handle
Aluminum Box Package Size: 15cm * 11cm (L * W )
Straight groove
Specification:
Material:High speed steel
Surface treatment: Titanium Plating
Outer edge angle:138 degree
Handle: Triangular handle
Aluminum Box Package Size: 15cm * 11cm (L * W )
Sizes: As the Picture
# 1: 3/16 "to 1/2" 6 Steps (3/16 '', 1/4 '', 5/16 ", 3/8 '', 7/16 '', 1/2 '')
# 2: 1/8 "to 1/2" 13 Steps (1/8 ", 5/32", 3/16 '', 7/32 ", 1/4 '', 9/32", 5/16 "11/32", 3/8 ', 13/32', 7/16 '', 15/32 ", 1/2 '')
# 3: 1/4 "to 3/4 '' 9 Steps (1/4 '', 5/16", 3/8 ", 7/16", 1/2 ", 9/16", 5/8 "11/16", 3/4 ")
# 4: 1/4 "to 1-3/8" '10 Steps (1/4' ', 3/8 ", 1/2", 5/8 ", 3/4", 7/8 ", 1 ", 1-1 / 8" 1-1 / 4 ", 1-3 / 8")
# 5: 3/16 "to 7/8" 12 Steps (1/4 '', 5/16 ", 3/8", 7/16 ", 1/2", 9/16 ", 5/8" , 11/16 ", 3/4", 13/16 ", 7/8")
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)
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 avo

HSS Titanium Coated Step Drill Bit Set Spiral Cobalt Multiple Ho