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Silver cylindrical diamond core bit 4.25 inch diameter 9.5 inch length with 5/8-11 thread and pilot bit adapter

VEVOR

VEVOR 4.25" Diamond Core Drill Bit 9.5" Depth 5/8"-11 Thread

SKU CH-Z22G-BZW20

Drills 4.25 in holes up to 9.5 in deep in concrete or brick, works wet or dry with a 5/8"-11 thread and includes pilot bit, adapter and 3.15 in saw blade

  • TypeOther Appliances
  • Width4.33
  • Universal 5/8"-11 thread fits standard drilling equipment directly
  • Wet and dry cutting modes suit different job-site conditions
  • 5 in drilling depth reaches through thick concrete and masonry
  • Laser-welded diamond segments stay sharp in brick, block and concrete
  • Kit includes pilot bit, adapter, 3.15 in diamond saw blade and hex wrench

4.25" Diamond Core Bit for Concrete

This 4.25 inch diamond core drill bit handles wet or dry cutting in concrete, brick, stone and foam brick. The 5/8"-11 inner thread fits standard handheld drills and core rigs for air-conditioning, pipeline and railing installations. Laser welding secures the segments for a 9.5 inch maximum drilling depth. The kit includes a pilot bit, adapter, 3.15 inch diamond saw blade and hex wrench.

Upgrade from Worn Segmented Bits

When existing bits lose cutting speed or wander off centre, this laser-welded design restores clean entry and consistent depth up to 241.3 mm. The included pilot bit eliminates the need for a separate guide, and the wet-or-dry rating lets you switch methods without changing tools. Builders who only drill shallow holes in soft masonry will not need the full 9.5 inch capacity.

Thread-On Install with Pilot Guidance

Screw the 5/8"-11 thread onto the drill, mount the supplied pilot bit for alignment, then remove it once the kerf is established. The 4.9 lb assembly runs on common handheld machines without special rigs. Overheating in dry mode and segment glazing in hard aggregate are the typical issues; use water feed or pause cycles to manage heat.

Highlights

  • Universal 5/8"-11 thread fits standard drilling equipment directly
  • Wet and dry cutting modes suit different job-site conditions
  • 5 in drilling depth reaches through thick concrete and masonry
  • Laser-welded diamond segments stay sharp in brick, block and concrete
  • Kit includes pilot bit, adapter, 3.15 in diamond saw blade and hex wrench

Specifications

TypeOther Appliances
Width4.33

Questions about this item

Does the 5/8"-11 inner thread fit my standard core drill motor?

The 5/8"-11 inner thread matches the standard spindle on most core drilling equipment and handheld drills, so it mounts directly without extra adapters.

What is the correct way to use the included pilot bit and hex wrench during installation?

Insert the pilot bit through the centre hole of the 4.25 in core bit, tighten the adapter with the supplied hex wrench, then start the hole with the pilot engaged to prevent the bit from walking before removing the pilot for full-depth drilling.

When should I replace the 3.15 in diamond saw blade and the core bit itself?

Replace the 3.15 in diamond saw blade once the diamond segments wear down and cutting speed drops noticeably; the main 4.25 in core bit lasts through many holes in concrete or brick but should be retired when the segment height is exhausted or the barrel shows cracking.

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