JIATENG TOOLS / FACTORY KNOWLEDGE
Technical Q&A
Material specifications and practical technical references from our drill manufacturing experience.
Technical Articles
From Our Factory
HSS MATERIAL SELECTION
How to Choose HSS Drill Bit Materials: 4241, 4341, M2, M35 & M42
Compare applications, finished-drill hardness, chemical composition and red hardness using material reference data.
Read Technical Article →HEAT TREATMENT & RED HARDNESS
How Do Heat Treatment and Red Hardness Affect HSS Drill Bits?
Compare heat-treated hardness and red hardness of HSS 4241, 4341, M2, M35 and M42 drill bits, and learn how heat resistance affects cutting performance.
Read Technical Article →HSS MANUFACTURING METHODS
Fully Ground vs. Roll Forged HSS Drill Bits: What’s the Difference?
Compare two drill flute manufacturing methods through real factory videos, dimensional accuracy, applications and cost.
Read Technical Article →DRILL DIMENSION STANDARDS
HSS Twist Drill Bit Standard Dimensions
Browse dimensional reference tables for DIN 338, DIN 340, DIN 1897 and ANSI B94.11M Jobber Length twist drill bits, including diameter, overall length and flute length.
View Standard Dimensions →Need a drill specification reviewed?
Send your workpiece, material grade, dimensions and purchasing requirements.