R Type CNC Cobalt Snappy Self Bi Centering Drill Bit Set Tool

• Customization: Available
• Customized: Customized
• Standard: AISI
• Model NO.: R type
• Length: Stub-length
• Type: Center Drill Bit
• Material: High Speed Steel
• Usage: Wood Drilling, Metal Drilling
• Product Material: 6542,M35,M42
• Technic: CBN
• Controlling Mode: CNC
• Customized Support: OEM, ODM, Obm
• Drill Length: 1.0-12.50mm
• Transport Package: Wooden Box
• Specification: high stainless steel
• Trademark: EDWIN
• Origin: China

Product Description

Compared with, type R has the following advantages :
Type R changes the cone generatrix of type A into an arc shape. According to the Pythagorean theorem, it reduces the contact area between the center hole and the tip, reduces the friction of the center drill, and improves positioning accuracy .
Smooth arc surface ensures a stronger drill tip
Arc structure reduces the risk of breakage and extends service life

Key features :
The center drill, which integrates drilling and chamfering , is mainly used to process the center hole of the workpiece. The center hole is the rotation reference and support hole of the workpiece during mechanical processing, especially turning.
Center drills can also be used for chamfering and countersinking
·The high-grade high-speed steel or carbide materials used in the R-type center drill are strictly controlled by dedicated personnel. They are different from the artificially high steel materials on the market and have high wear resistance and long service life ;
·Using advanced CNC equipment, it is processed in at least ten processes before and after to ensure the accuracy of the drill bit.  
·The CBN grinding wheel is fully ground and manufactured, with high smoothness and sharp edge ;  
·Improved cutting edge angle meets universal usage requirements and ensures smooth and efficient cutting ;  
·Reasonable chip groove design ensures smooth and light chip removal ;  
·The cone surface has continuous relief angle ;
·Suitable for processing steel, iron castings, non-ferrous metals and light metals  


Technical Data :

Size(mm)	Length( mm )	K ( mm )	D1(mm)	L1(mm)	HSS 6542	Cobalt M35	High Cobalt M42
1.00	31.5	2.50	3.15	3.00	·	·	·
1.25	31.5	3.15	3.15	3.35	·	·	·
1.60	35	4.00	4.00	4.25	·	·	·
2.00	40	5.00	5.00	5.30	·	·	·
2.50	45	6.30	6.30	6.70	·	·	·
3.15	50	8.00	8.00	8.50	·	·	·
4.00	56	10.00	10.00	10.60	·	·	·
5.00	63	12.50	12.50	13.20	·	·	·
6.30	71	16.00	16.00	17.00	·	·	·
8.00	80	20.00	20.00	21.20	·	·	·
10.00	100	25.00	25.00	26.50	·	·	·
12.50	125	31.50	31.50	16.50	·	·	·

* : "·"  means customizable production