Pre-Cut Bullet Tip HSS Twist Drill Bit DIN338rn for Alloy Steel Iron Metal Drilling

• Customized: Customized
• Standard: DIN
• Length: 86mm to 151mm
• Type: Twist Drill Bit
• Material: High Speed Steel
• Usage: Metal Drilling
• Model NO.: 978
• Steel Type: HSS M2
• Craftsmanship: Fully Ground
• Flute Type: N
• Drilling Head: Bullet Tip with Split Point
• Marking: Stamped Marking
• Surface Treatment: Bright Finish
• Shank Type: Cylindrical
• Standard Type: DIN338rn
• Transport Package: Blister, Skin, Sandwich, Color Paper Hanger, Paper
• Specification: 4.8mm to 13mm diameter
• Trademark: OEM, HTT
• Origin: China
• HS Code: 8207509000
• Production Capacity: 6800000PCS/Year

Product Description

*For use in alloyed and unalloyed steels up to 900 N/mm2 tensile strength, sheet metal and thin-walled profile material(pipes and without pre-punching), where exact and clean drilling is required.

*Special designed pilot point penetrates material faster and allows precise drilling on curved surfaces.

* Optimized flute geometry specially ground shoulder cutting flutes for milling exact circular holes with clean edges.

* Core reinforcement 2x longer life, 2x stronger core. Constantly increasing core diameter in the direction of the shaft for increased durability. Gives maximum fracture stability.

* DIN338RN standard to meet most of drilling stations and workplace demands.




*Other special sizes are also available on the customers' special request.

Item Number	Diameter(mm)	Working Length(mm)	Overall Length(mm)
978.338045	4.8	52	86
978.338050	5	52	86
978.338052	5.2	52	86
978.338055	5.5	57	93
978.338060	6	57	93
978.338062	6.2	63	101
978.338065	6.5	68	109
978.338070	7	69	109
978.338075	7.5	75	117
978.338080	8	75	117
978.338085	8.5	81	125
978.338090	9	81	125
978.338095	9.5	87	133
978.338100	10	87	133
978.338105	10.5	94	142
978.338110	11	94	142
978.338115	11.5	101	151
978.338120	12	101	151
978.338125	12.5	101	151
978.338130	13	101	151