11° Tapered Spherical Ball End Drill Bit 7 Tooth 40mm Diameter

Price Negotiable

Price: Please contact us

MOQ: 10PCS

Delivery Time: 7-15 Days

Brand: HLDRILL

Product Description

7-tooth 40mm diameter 11° tapered spherical button bit

Product Specifications

Product Name:

7-Tooth Tapered Ball-End Drill Bit

Diameter:

40mm

Body Length:

50mm (50mm/55mm/60mm/68mm/72mm/78mm available)

Tapered Degree:

11° (4°46′,6°,7°,11°,12° available)

Steel Grade:

42CrMo, 45CrNiMoVA

Carbide Grade:

YK05/KD10/KK05/YG9C/YG10C

Net Weight:

0.3 kg per piece

Packaging:

50 pieces per plywood case

Product Overview

The Hanglong 7-tooth tapered ball-end drill bit is engineered for high-precision surface drilling and narrow-space operations in soft to medium-hard rock formations. Combining spherical drill bit design, optimized tooth layout, and compact structure, it is the ideal solution for tunnel profiling, rock carving, slope reinforcement and anchoring, and applications requiring exceptional drilling accuracy.

Key Features & Benefits

Seven evenly distributed carbide buttons designed specifically for contour drilling and curved rock surfaces
Spherical design ensures full contact with curved surfaces and even distribution of impact force
7-tooth configuration increases drilling speed by 18-22% in sandstone, limestone, and weathered granite compared to 5-tooth designs
11° taper angle provides stable drilling performance and prevents slippage
Compatible with most lightweight drill rods and handheld drilling rigs without custom adapters
Ultra-compact 50mm height for access to confined spaces
YG11C tungsten carbide buttons deliver high hardness and impact toughness
Alloy steel body undergoes double heat treatment (quenching + tempering) for enhanced tensile strength and bending resistance

Product Images