Mte Hss DIN 338 Drill Bit Cylindrical Shank Short Ground Type 13.5 mm

Mte Hss DIN 338 Drill Bit Cylindrical Shank Short Ground Type 13.5 mm

Short Series, Ground Type, Solution for High Precision and M14 Bolt Clearance Applications

Mte HSS DIN 338 Drill Bit (13.5 mm) Short Series, Ground Type is a high-quality cutting tool designed for precise drilling operations. This drill bit is ideal for applications requiring high tolerance and excellent surface quality, especially in large diameters. It has a sharper geometry and a more accurate diameter compared to roll-forged types. The 13.5 mm diameter is critical as it serves as a suitable clearance hole for M14 metric standard bolts or can be used as a pilot hole for M16 fine threads.

The product's main strength comes from its HSS (High-Speed Steel) material and, specifically, its Ground manufacturing method. Ground bits offer higher precision, sharper cutting edges, and better chip evacuation compared to roll-forged bits.

Technical Specifications and Material Details

The Mte Drill Bit has optimized features for M14 bolt clearance and general-purpose large-diameter drilling applications.

Feature Name	Detailed Description
Diameter (Nominal)	13.5 mm
Standard	DIN 338: German standard for twist drill bits with cylindrical shanks and standard short length.
Manufacturing Method	Ground: The bit is fully ground from solid steel. This ensures high precision, tighter tolerances, and excellent surface quality.
Material Type	HSS (High-Speed Steel): Offers high wear resistance and toughness. Does not contain cobalt (HSS-E) (Standard HSS).
Surface Treatment	Bright finish (typically).
Shank Type	Cylindrical Shank: The shank diameter of large diameter bits is often reduced to 13 mm (Reduced Shank).
Point Angle (Estimated)	Typically 118° point angle. (Offers better centering and cutting performance due to its precise geometry).
Cutting Direction	Right-hand Cutting

Applications and Industries Used

This drill bit is particularly used in M14 bolt clearance and general large-diameter drilling applications:

Machine Manufacturing and Assembly: As a suitable and easy clearance hole for M14 metric standard bolts. (A standard tolerance hole where the bolt can be easily inserted and removed).

General Metal Fabrication: Drilling assembly holes in medium and thick section steel, stainless steel (low alloy), cast iron, and aluminum profiles.

Plumbing and Construction: Drilling in steel structures, pipelines, and flanges.

Mold and Tool Making: Preparation of precise and large-diameter pinholes and bearing seats.

M16 Fine Thread Pilot Hole: Can be used as a pilot hole for tapping in special fine thread applications such as M16 x 1.0 (Fine Thread).

User Information and Benefits

This product caters to users seeking high precision and reliable performance for M14 bolt clearance and general large-diameter drilling operations:

M14 Bolt Clearance Hole: The most common use is to drill a hole through which M14 bolts can easily pass. Being ground ensures the hole is precise and smooth.

High Precision and Surface Quality: Thanks to the ground manufacturing method, the hole diameter and position are extremely accurate. It provides a smoother surface quality in large diameter holes, which is important in precision assembly and bearing applications.

Sharper Cutting Edges: Cutting edges, which are sharper than roll-forged types, require less cutting force and produce cleaner holes.

Improved Chip Evacuation: Precisely ground flutes ensure efficient evacuation even with large chip volumes.

DIN 338 Short Series: The short design minimizes vibration and deflection, allowing for more stable drilling.