Cemented Carbide Drill Use

●Chip processing
Processing cemented carbide drill, do not want the chips together into a strip of discharge. Especially in processing toughness relatively strong material, the chips long chip clogging, and thereby damage the tool. In this case, generally stop feeding, chip removal and then continue processing in this way is called phase-fed.
In order to cut off the chip, the method can be used to install a metal shim in the flute cemented carbide drill section.

● Drill diameter and depth of the openings

The standard depth of the opening is maximum 5 times the diameter of the drill shank brazed cemented carbide blade type, maximum depth can be up to 7-8 times the drill diameter, and of course in that case the treatment of the chips is very important .

● The use of the guide sleeve

when the work surface is not flat, in order to prevent the nose jitter and cause damage to the cutting edge, as far as possible using the guide sleeve, so that the cemented carbide drill work material can be cut in a straight line.

Cemented Carbide Drill Processing Abnormal &Solutions

Cemented carbide drill tool is used for drilling in the solid material through holes or blind holes and reaming of the existing holes.

Cemented carbide drill processing abnormal causes and countermeasures

Situation	Reasons	Solution
Drilling into the oval	Form threaded scratches	1.Using a suitable drill sets 2.Reduce the clearance angle 3.Check the drill bit tip angle is symmetrical with both sides length
	Produce fibrillation, vibration	1.Reduce the clearance angle 2.Web thinning 3.Shorten cemented carbide drill length , increased drill bit rigidity 4.Check cemented carbide drill angle grinding is correct or not 5.Check the fixture cemented carbide drill contact situation 6.Pre-drilled center hole 7.Improve the rigidity of the working machine
	The chip discharge is not easy	1.Increase the weekly amount of feed 2.Select the correct helix angle 3.Increasing the groove width ratio 4.Intermittent feed
Drilling tilt	Adverse when cutting	1.Using the appropriate drill sets 2.Reduce the cut when the weekly amount of feed 3.Pre-drilled center hole
	Drill rigidity is bad	Shorten cemented carbide drill length , increased drill bit rigidity
	Drill bit angle is wrong	Resharpening cemented carbide drill