Pre-Cut Bullet Tip HSS Twist Drill Bit DIN338rn for Alloy Steel Iron Metal Drilling
ZHENJIANG HTT TOOL CO., LTD.- Customized：Customized
- Standard：DIN
- Length：86mm to 151mm
- Type：Twist Drill Bit
- Material：High Speed Steel
- Usage：Metal Drilling
Base Info
- 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
Description
Basic Info.
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/YearProduct 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 |